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Found 95 results with term `` , from `Intl No-Dig-2019 Florence`
| ID | Title | Event | Company | Year ▼ | Category | Abstract | Add to Cart |
|---|---|---|---|---|---|---|---|
| 2266 | A case study in successful sewer network rehabilitation with UV cured CIPP & Traditional/non-traditional survey technologies Author: Jan Borje Persson |
Intl No-Dig-2019 Florence | Bkp Berolina Polyester Gmbh & Co. | 2019 | Cured in Place Pipeliners |
This paper will focus on pipe condition assessment of approximately 16 Km followed by rehabilitation of over 3 kilometer of pipelines in a waste water network, using UV cured CIPP method, with reference to a project successfully completed in Ras Al Khaima, the United Arab Emirates. The project was undertaken by the local specialist contractors international Aramoon C. Ltd (IAC), using the BKP Berolina-Liner System and was part of a wider survey of approximately 16 kilometer of the network. BKP have co-operated in the region with IAC since 2009, completing the first installation in Saudi Arabia using the Berolina-Liner System in the autumn of that year. Survey of the network was undertaken using a combination of traditional CCTV inspection and Electroscan ?s state of the art FELL® system. Pipes rehabilitated included PVC pipes with diameters ranging from 200 mm to 500 mm. This paper will examine the results of the survey of the networks, the choice of the CIPP method and the factors that allowed IAC, the specialist contractor for the installation, to take advantage of the benefits of the tightly controlled parameters of the curing process using the Berolina-Liner System, to meet the local demands (click to report an error) more... share... |
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| 2288 | A MICROTUNNEL WITH A VERY LITTLE RADIUS FOR A BIG PIPELINE Author: Ugo Lazzarini, Antonio Guerini |
Intl No-Dig-2019 Florence | Max Streicher S.p.a I.c.o.p. S.p.a. | 2019 | Microtunneling and Pipe Jacking |
The use of the curvilinear microtunnel in c.a., for the installation of large diameter pipelines carrying natural gas, is now a well-established practice to overcome watercourses or major infrastructures. The choice to build a microtunnel with a curvilinear profile allows to significantly reducing the depth of pushing wells and the receipt of drilling and, consequently, the risks associated with underground work. The mechanical characteristics of the steel pipe to be positioned in the microtunnel heavily affect its size as the elastic radius of the pipe determines the minimum radius of the curvature of the microtunnel. In the case in question, a ND 1400 (56 ") steel pipe with a usual bending radius of about 1.600 m was laid to cross the Highway "Autostrada del Sole" by means of a microtunnel with an internal diameter of 2.100 mm. For the first time in the microtunnel, which we call "Costa Rica", of only 156 m length, it was possible to lay the pipeline with a radius of curvature reduced to only 800 m, much lower than that normally used. This was possible thanks to an innovative design choice that entrusted the success of the work to the perfect execution of the microtunnel along the project profile and the ability of the workers responsible for assembling the pipeline to manage it with absolute skill. The construction of the entire work, including the laying of the pipeline, was carried out in a shorter time and with absolute precision. (click to report an error) more... share... |
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| 2323 | A NEW FRP SOLUTION FOR RECONSTRUCTION OF DETERIORATED PIPES AND CULVERTS Author: Mo Ehsani |
Intl No-Dig-2019 Florence | University Of Arizona And Quakewrap Inc. | 2019 | Slip Linings (Loose Fit) |
Pipelines are a major component of the infrastructure that often get damaged by corrosion. In many cases, the repair may require restoring the strength of the pipe to its full original capacity, including the effect of external gravity loads. Access is always a challenge as these structures are buried deep and cutting trenches to replace the damaged pipe can add significant cost and time to the project.This paper introduces a new type of Fiber Reinforced Polymer (FRP) pipe developed by the author that utilizesthe sandwich construction techniqueto achieve high stiffness. The technique received the 2016 American Society of Civil Engineers (ASCE) Innovation Award as the world's first green and sustainable pipe. This technology allows two methods of repair. In one case a custom pipe can be builtto any shape and size in segments of any length up to 10m long that can be used to slip-line the old pipe. In the other case, the host pipe is used as a mold to build a fully structural pipe below ground on site.The paper focuses on threesuccessfully completed projects in the US, Australia and Puerto Rico where both pressure pipes and gravity flow culverts have been repaired under some unique challenging conditions. (click to report an error) more... share... |
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| 2306 | A NOVEL CYBER-MONITORING BASED ASSET MANAGEMENT SCHEME FOR WATER DISTRIBUTION NETWORKS THROUGH FINE-TUNING GENETIC ALGORITHM PARAMETERS Author: Ahmad Momeni and Kalyan R. Piratla |
Intl No-Dig-2019 Florence | Glenn Department Of Civil And Environmental Engineering, Clemson University | 2019 | Site Survey / Pipe Inspection |
There has been an urgent need to monitor, model, and tackle the extreme deterioration of water pipeline systems in the United States and other parts of the world to the quickest and best extent. Since manual pipeline inspection takes excessive costs, effort and time to consider most uncertainties, a novel and swift scheme is required to engage in asset management, which should ensure the accuracy as well as the quickness of the inspection at minimum effort and cost. This paper presents and validates a framework to predict the condition of critical pipeline assets using water distribution monitoring data. A benchmark water distribution network is first operationally optimized, and its pipe roughness values and diameters are subsequently reduced in a random manner in order to create a representation of an old and deteriorated water distribution network. The operational data (i.e., pipe flow and pressure) for such deteriorated network as obtained through simulations using EPANET 2.0 is leveraged to predict the pipe roughness and effective hydraulic diameter values. Evolutionary optimization algorithms are used to predict the roughness and diameter values. The novelty of this study entails: (i) employing modified genetic algorithms in MATLAB interface where multiple attempts are made towards finding the optimal solution by running on several distinct sets of initial population in conjunction with fine-tuning of mutation and crossover parameters; (ii) including an ad hoc function to cut down on the temporal expensiveness of the convergence; and (iii) assessing the validity and accuracy of the simulation-based optimization framework using mean absolute error (MAE) and mean absolute percentage error (MAPE). Successful outcomes of this study offer a great potential in predicting condition of critical water infrastructure assets based on the operational monitoring data that is increasingly being collected in the recent times (click to report an error) more... share... |
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| 2245 | A Novel IoT Application System Using Wearable PPG Heart Rate Monitoring Devices to Improve Safety Management for Shield Tunnel Construction Projects Author: Wei-Cheng Chen, Hui-Ping Tserng and Josh Huang |
Intl No-Dig-2019 Florence | Department Of Civil Engineering, National Taiwan University; Gini Bio-technology Corporation Limit | 2019 | Associated Technologies, Techniques and Equipment |
According to the latest statistics revealed by International Labor Organization (ILO), 33.7 million accidenceshappened around the global with USD1.2 trillion lostconsequently.Safety management has been acting as the mostimportant role in allnationalconstruction projects, that encourages innovative technologiesto be introduced to many construction projectstosave more precious lives. This paper proposes wearable heart rate monitoringdevices andsenor networksto instantlyassess worker's workload,that can prevent accidents caused byworker's unintentionalerrors.Heartrate is commonly recognized as human'sphysical and psychological index used to assess one's health status inclinics. Thanks to the advance of micro photo-electronic technologies, the Photoplethysmography(PPG) deviceis popularly used as the heart rate monitorintheathletic trainingprogram. To extend the value-addedapplicationof wearable PPG devices, we've developed a novel IoT system incorporated with the bioinformatics theory. Therefore, we can continuously monitor and collect construction worker's heart rate without interfering their routine work. In our experiment,16 volunteer workers from a shield tunnel construction project have joinedourfield test. However, theresult of our firstfield testwas notsatisfactory. Modification workof wearable PPGdevices and IoT gateways wereconducted successfully to fulfillthe expected data availabilityof 80%. We increasedthe data transmission rate of the PPG device, andincreased the number IoT gateways installedin the shield tunnel. Finally, we have successfully achieved 85% of the dataavailability in our secondfield testconductedinOctober and November2018.In this paper, we demonstratethe PPG heartrate monitoring device, Bluetooth sensor network and application system used in the shield tunnel construction projects. In order to analyzeworker's workload, we've established the standard procedure of measuring worker's Resting HeartRate (RHR), the assessment method of Percentage of Reserve HeartRate (%HRR) and Workload (%L), which can be appliedas the guideline forarranging worker's shiftsand tasksinthe shield tunnel construction projects (click to report an error) more... share... |
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| 2241 | A novel monitoring procedure for assess the correct road pavement restoration after the One-Day-Dig mini-trenching installation Author: Gianluca Cerni, Barbara Bernardini, Diana Salciarini, Federica Ronchi, Alessandro Corradini, Evelina Volpe |
Intl No-Dig-2019 Florence | University Of Perugia,department Of Civil And Environmental Engineering; University Of Molise, Dep | 2019 | Asset Management and Work Planning |
This paper presents the results of a monitoring campaign aimed at evaluating the road restoration process of the One-Day-Dig (1DD) mini-trenching technology in terms of pavement evenness. The 1DD, patented by SIRTI, leading Italian company in the infrastructure sector for telecommunications, is an innovative installation method for the creation of a narrow trench to lay cable or micro-duct in the ground. In a few hours, the trench is backfilled and sealed, speeding up the construction process and reducing any aesthetic issues thanks to the small footprint that will fade over time.In this experimental activity, more than 20 kilometersof roadnetwork interested by 1DD mini-trenching were detected using a 3D laser scanner. The point clouds collected by the laser scanner have been handled using an open source processing software and developing a proper procedure to manage the whole dataset. The main goal of the procedure is to assess the vertical deviations of the mini-trench surface from a reference plan representative of the road pavement.Results show that either negative (sags) or positive deviations (bumps) are determined with a high level of accuracy for the entire route realized in 1DD. Furthermore, the available data can be analyzed considering different levels of inspection, from local evenness evaluations to a wider scale of assessments such ason hundred meters stretches. (click to report an error) more... share... |
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| 2307 | A PIPE-DETECTING PROJECT AND TECHNICAL ASSISTANCE IN BANGLADESH Author: Kazuki Kito, Masahiro Yoshimoto; Koji Kamiyo |
Intl No-Dig-2019 Florence | Tepco Power Grid; Geo Search Co. | 2019 | Site Survey / Pipe Inspection |
This paper describes a pipe-detecting project and how it improved the accuracy of available information by using electromagnetic radar. The project was conducted in Dhaka, the capital of the People's Republic of Bangladesh, in early 2019. TEPCO Power Grid, Inc. (TEPCO) is providing consulting services for the construction of Bangladesh's first underground substation and for an underground transmission-and-distribution cable improvement project. This project included the design of approx. 5 km of distribution line. The design needed a detailed and precise map of buried pipes to plan the installation of the new pipes. However, Dhaka presented some challenging problems, such as (1) prohibition on road digging due to chronic congestion, (2) lack of accurate information on buried pipes, and (3) insufficient technology (i.e. underground detection technology). These problems made it difficult to use general methods for experimental digging and underground detection on-site for the project. To address these problems, a team of experts from TEPCO and Geo Search, a high-tech company specializing in underground detection, conducted a pipe-detecting project in Dhaka. The project was also conducted to train engineers from the Bangladesh University of Engineering & Technology, with the aim of contributing socially to the country of Bangladesh. Remarkably, the project found 35 utility pipes within the area of the planned distribution line, 29 of which (83%) were non-registered pipes that may have had a large impact on the planning and installation of the distribution line. (click to report an error) more... share... |
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| 2251 | A UNIQUE EXAMPLE OF CLOSE FIT LINING TECHNOLOGY FOR THE RENEWAL OF WATER PIPES ALONG THE BRIDGE "PONTE PUNTA PENNA" IN TARANTO Author: Giovanni Bramante, Gianluca Casamassima, Celestino Davide Tria, Antonio Schinaia; Federica Fuselli |
Intl No-Dig-2019 Florence | Acquedotto Pugliese S.p.a; Rotech Srl | 2019 | Close-Fit Linings |
The Project concerning the rehabilitation of four pressure pipes located inside the bridge "Ponte Punta Penna-Pizzone" in Taranto represents one of the most significant international examples in the field of close-fit lining technology. The bridge rests on 14 spans rising to 47m and holds four steel pipes of 1200m in length DN 500mm hanging inside the deck. Through these pipelines passes a water flow of 500 l/s ensuring the water needs of about 200,000 inhabitants. The rehabilitation through close-fit lining technology consists in inserting into each of the four pipelines a new tube in high-strength polyethylene which is temporarily deformed and subsequently restored into the required shape and size to adhere perfectly to the inner wall of the existing pipe. The advantage consists in avoiding a significant reduction of the hydraulic section and in obtaining a new pipeline that guarantees its own structural resistance independent of the contribution of the existing pipeline. Another important advantage is the stability even in the presence of severe corrosion of the hosting pipe with an extension of the working life cycle of the pipelines by 80 years. A qualified team had to be identified with a strong innovative capacity and capable of ensuring a coordinated project throughout all its development. The cost of rehabilitation was 2.5 million euro. The project was successfully completed in 9 months. (click to report an error) more... share... |
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| 2252 | Advances in CIPP Pressure Pipe Liner Testing and Design Author: Kay Awe, Mark Knight, Ahmed Abdel-aal, George Bontus |
Intl No-Dig-2019 Florence | Department Of Civil And Environmental Engineering, University Of Waterloo; Aegion Corporation | 2019 | Cured in Place Pipeliners |
In North America CIPP pressure liners are typically designed using ASTM F1216 Appendix x1.1. This paper will discuss ASTM F 1216 design method limitations for the design of potable water CIPP pressure liners and the need to complete hydrostatic burst tests on full scale CIPP samples. It will then discuss the development of the Waterloo CIPP Pressure liner test facility and test results on a CIPP liner products available in North America. The test results will show significant short-term burst test variability and how this variability can impact the CIPP liner pressure rating. (click to report an error) more... share... |
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| 2308 | AN AUTOMATED LEAKAGE DETECTION MODEL FOR WATER DISTRIBUTION SYSTEM Author: Harshit Shukla and Kalyan R. Piratla |
Intl No-Dig-2019 Florence | Glenn Department Of Civil Engineering, Clemson University | 2019 | Site Survey / Pipe Inspection |
Leakages are the enemy of water supply systems all over the world. According to recent studies, at least 20% of treated freshwater is lost during transportation due to the leakages. The contemporary leakage detection techniques are able to locate the leakages in the buried pipeline system. However, they require a skilled workforce, expansive equipment and does not support the continuous monitoring of water pipeline networks for leakage detection. In this paper, authors present a deep learning convolutional neural network (CNN) model to predict the leakage sizes using the flow-induced vibration data. The main objective of this study was to use the acceleration signal data collected from a single accelerometer to detect the leakages of the given pipeline network. A two looped pipeline network which comprises a pump, reservoir of 820-litre capacity, varying pipeline diameters, burial conditions, various bends, T-joints, leak simulators and a flowmeter was used to collect flow-induced vibration using accelerometers. In this experimental setup, half of the pipeline length was unburied and the other half was buried with soil backfill. A total of 12 accelerometers were mounted across the pipeline network where 6 accelerometers were mounted on the unburied pipeline and remaining 6 accelerometers were mounted on the buried pipeline network. Several leakage scenarios were designed and acceleration signal data was then converted into image format using continuous wavelet transformation (scalogram) plotted as a function of time and frequency. These images were used to train a CNN model with the help of AlexNet (pre-trained network). The final layers of AlexNet were modified according to the need of scalogram image data and 80% of the total images were used to train and develop the CNN model. The trained model was used to predict the leakage scenarios of the remaining 20% of the images. The prediction accuracy of the trained CNN model was found to be approximately 90%. The findings of this study suggest that the acceleration signal of a single accelerometer can be used to predict the leakage sizes of the given pipeline network with 90% accuracy. Predictive models would allow the water utility companies to monitor their water distribution system in near real time and detect the leakages in the early stage to minimize the loss of treated freshwater. (click to report an error) more... share... |
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| 2327 | Application of solubilizing surfactant in trenchless drilling fluid Author: XuLanbo and Wu Xiaoming |
Intl No-Dig-2019 Florence | Faculty Of Engineering, China University Of Geosciences | 2019 | Testing & Assessments |
In trenchless construction,the dissolution rate of drilling fluid mixing is too slow,which requires a long time to be pre-hydrated and dissolved.In actual construction,people have to put incompletely dissolved drilling fluid into the hole ahead of time.The drilling fluid with incomplete performance can not achieve the expected effect.Itnot only affects the quality of the project,wastes materials,but also sometimes bringsadverse effects.Aiming at this problem,solubilizing surfactant which is the key factor affecting the solubility of drilling fluid was found out.Adding surfactant in drilling fluid can reduce the wetting speed of bentonite powder and prevent it from caking when mixing.At the same time,and the mutual exclusion between fat molecules and water molecules is eliminated,so that drilling fluid additive can quickly wet and disperse in the liquid.Through the solubility test,the solubilization efficiency of different surfactants was compared,the suitable surfactants were selected and the efficient instant drilling fluid system was developed.Compared with common trenchless drilling fluid system,the apparent viscosity of drilling fluid increased by 65% in 30 minutes (click to report an error) more... share... |
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| 2309 | ASSESSING THE UNDERWORLD -A THREE-INFRASTRUCTURE APPROACH TO REMOTE SENSING Author: Chris Rogers, David Chapman,Nicole Metje and Mehran Eskandari Torbaghan |
Intl No-Dig-2019 Florence | Department Of Civil Engineering, Universityof Birmingham | 2019 | Site Survey / Pipe Inspection |
Many of the major challenges to a flourishing and pervasive trenchless industry are acutely associated with the complex urban context in which the works are carried out. The first, and most often quoted,challenge, is knowing where the current buried infrastructure is situated, and consequently 'seeing below the ground' to detect, locate and map existing pipes and cablesis the subject of much research (including the UK's Mapping The Underworld). Knowing where and what the buried infrastructure is enables both detailed planning and, crucially, de-risking of trenchless projects. However, such knowledge provides streetworks engineers with only part of what they need: this paper takes a broader, systemsview of the streetworks context to enable engineering works to be properly conceived, designed and carried out to provide thebest long-term outcomes in the circumstances. The enabling step is to consider streetworks as engineering interventions in three strongly-interdependent infrastructures -road infrastructure, buried infrastructure and the geotechnical infrastructure that supports them both -all having different structural performance criteria and deterioration models, and all in potentially different current states of structural competence. Disturb any one infrastructure and the other two will be affected in some way; disturb all three and the whole system dynamic is changed. The paper therefore argues that the brief for surveying in advance of trenchless works should be broadened to cover the constitution and the condition of all three infrastructures, from which the engineering consequences of trenching (which almost always adversely affectsthe condition of adjacent buried pipes and cables, hence all three infrastructures) and trenchless operations (with usually fewer adverse consequences to this system) can be far moreaccurately determined. The paper describesthe outcomes of Assessing The Underworld -a 4-year research programme exploring how surveying approaches and technologies can meet this challenge. (click to report an error) more... share... |
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| 2250 | AWWA Watermain Rehabilitation Initiatives Author: Mark Knight |
Intl No-Dig-2019 Florence | Department Of Civil And Environmental Engineering, University Of Waterloo | 2019 | Cured in Place Pipeliners |
The American Water Works Association (AWWA) is currently developing standards on Watermain rehabilitation - CIPP and Sliplining. It has also recently completed a white paper that provides quantitative tests to classify watermain rehabilitation products and gives guidance on design of pressure lining systems. AWWA is also revising M28 the Watermain Rehabilitation manual. This paper will discuss in detail AWWA ongoing and completed initiatives. (click to report an error) more... share... |
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| 2242 | Business and the SDGs Author: Per Holm |
Intl No-Dig-2019 Florence | Blukolding | 2019 | Asset Management and Work Planning |
We believe that everything we do must contribute to a viable and sustainable world without waste. We exist to protect our common values, the water environment and public health. In order to do so we work with the Blue Economy, circular thinking and the UN's Sustainable Development Goals. We will not settle for minimizing damages to nature and the climate. We strive to complete reverse the trend and raise the level of ambition from doing less damage to doing more good. We believe it is possible, because we have already done it. We have evolved from a traditional waste water company focusing on doing less damage to nature and the water environment to a contemporary environmental, energy and climate company that wants to do more good. From simply cleaning the waste water and making sure it does no damage to upcycling it, and other natural resources. From believing that modesty is the best policy to leading by example by sharing our knowledge, ideas, and accomplishments to inspire customers, partners and the rest of the world. (click to report an error) more... share... |
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| 2253 | CIPP - Advantages, risks and potentials of LED curing Author: Niklas Ernst |
Intl No-Dig-2019 Florence | Bluelight Gmbh | 2019 | Cured in Place Pipeliners |
Bluelight is a LED curing CIPP system for laterals and small pipes. It works in a diameter-range between 100mm and 250mm (from 4 inch to 10 inch) with flexible liners and can perform diameter changes plus bends up to 90 degrees. Nonflexible GFRP liners can also be cured from 200mm up to 300mm. The curing is performed by LEDs in the wavelength of the blue light (450 nm). The carrier is based on flexible felt with a PU coating or GFRP. The resin is based on a styrene free vinyl-ester backbone with a patented photo-initiator that reacts only in the wavelength of the light-heads. In recent years, the Bluelight LED system technology developed by Danish Per Aarsleff A/S has become established in Germany, Switzerland and Scandinavia as a standard method for renovating pipe liners inconnecting pipes. The system technology on offer consists of patent-protected curing technology and matching pipe liners which have been approved by the DIBT (German Civil Engineering Institute). In practice, this approach has proved itself to be simple, fast, clean, practically noise and odor-free and, most importantly, reliable right from the first moment of use. What are the future development potentials of LED curing technology? Before discussing future potentials, it is first worth looking in detail at the principles that underpin this method. We shall also indicate the limitations of the technology and point out the risks of various combinations of liners and curing methods. (click to report an error) more... share... |
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| 2254 | CIPP RELINING OF A DN 300 mm PRESSURE STEEL WATER PIPE ANCHORED UNDER THE ANCIENT Bridge of the Academy in the historic center of Venice Author: Gianluca Paro |
Intl No-Dig-2019 Florence | Risanamento Fognature Spa | 2019 | Cured in Place Pipeliners |
Recent restoration of the bridge has started at the end of 2017 and the renovation works of the "Accademia" bridge in Venice has been coordinated directly by the Maintenance and Viability office of the Venice Historic Center - Public Works Directorate of the Municipality. On this occasion, since jobsite was set for months, various worn technological systems crossing the bridge have been replaced or reinforced to bring light, water, gas... The restoration jobsite of the second main bridge built on the Grand Canal after Rialto one, necessarily implied the construction of important temporary accesses for pedestrian to the work site, minimizing the impact of site on the delicate urban fabric of Venice. With the commencement of the works, Works Management has wisely involved all the interested parties, including the managers of the sub-services that cross the bridge itself. Given the importance of the intervention, the goal was to allow the renewal of all the dated artefacts that were present within the bridge (click to report an error) more... share... |
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| 2310 | Condition monitoring of excavated CIPP-liners to ensure lifespan Author: Love Pallon, Olle Persson, Erik Marklund, Annika Malm and Thomas Johansson |
Intl No-Dig-2019 Florence | Rise Research Institutes Of Sweden; Renoverava | 2019 | Site Survey / Pipe Inspection |
In Sweden there is a lack of knowledge on the expected service life of installed CIPP-liners and a general aim to request CIPP-liners with a 100-year lifespan. In cooperation with Swedish water utilities a national project has been launched for condition monitoring of used CIPP-liners. A large number of CIPP-liners installed in sewage pipes will be excavated and analyzed in order to evaluate material degradation and estimating remaining service life. The CIPP-liners are all between 5-35 years old.The material performance of the CIPP-liners are either compared with the reference data provided from the installation, or in some case compared to pieces of corresponding CIPP-liners that have been kept in a storage. These piecesbecomes especially valuable when looking at possible changes in mechanical properties that may have occurred during the time in use. The materials will be assessed by e.g. bending modulus to investigate material integrity and e.g. FT-IR for chemical stability in the environment of the sewage system. In total the results will give a valuable tool in assessing the expected lifetime of the installed CIPP-liners. The knowledge acquired will help Swedish water utilities to predict service life of installed CIPP-liners and to set sufficient quality demands on new installations for pipe renovation. At an initial stage two excavated CIPP-liners that have been in use for 12 and 16 years have been analyzedand compared with reference data from the time of installation (click to report an error) more... share... |
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| 2244 | Consideration in planning successful trenchless utility installations Author: Loui Thomsen and Jesper E. Andersen |
Intl No-Dig-2019 Florence | Department Of Water And Nature, Cowi A/s | 2019 | Asset Management and Work Planning |
In the northern part of Europe many trenchless utilityinstallations are done on a slim baseline of preliminary investigations, assessments and planning.It's not just about choosing the right trenchless technique but also considering manyother factors in the planning phase to insurea successful installation. Based on more than 10 years of experience COWI has developed a well-functioningpraxis for the task.This paperdescribesthe overall background of trenchless installationsin Denmark and the development of same. The continues development withinthe last decade has resulted in anecessity to make throughconsiderations before executing trenchlessinstallationshence the need for a planning methodic. The paper will fathom the fundamentals of the COWI way of planning trenchless utility installations. Furthermore,the paper contains the baseline of our way of executingand plan site investigations before executing the actual utility installationsalong with ourway of evaluating results of executed site investigations.Likewise,the paper will show the overall praxis of COWI's final assessment of recommended installation praxis and methods. (click to report an error) more... share... |
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| 2297 | Contact Mechanics and its Normalized Indices for Trenchless Cutting Associated with Machine Learning Author: Li-Hsien Chen, Jhih-Ping Huang, Yao-Chung Chen |
Intl No-Dig-2019 Florence | Department Of Civil Engineering, National Taipeiuniversityof Technology; Department Of Constructio | 2019 | Microtunneling and Pipe Jacking |
This study aims at investigation of underground mechanical excavation including both design and construction as turnkey project. During both stages, contact mechanicswith unified normalized indices were developed for trenchless cutting process. By using dimensional analysis, the proposed model generalizes mechanical as well as geological characteristics corresponding to two main types of cutting forces (thrust and torque) to evaluate their excavation progress with penetration rate. Furthermore, the normalized cutting indices can be used not only to estimate the functionality and efficiency of cutting machine adopted for tunneling project, but also to offer a warning system for inadequate cutting strategy.In addition, this study also examine the feasibility of cutting indices to predict the change in geological conditions during cutting process by using machine learning/data miningpackageso-called WEKA. Comparing withtwo case histories, some crucial applicable results show that the difference methods between classical mechanics and novel AI approach are quite useful to examine the cutting behavior during the life cycle of tunneling project (click to report an error) more... share... |
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| 2305 | CRITICAL ANALYSIS OFPIPE RAMMING BEHAVIOR AND FACTORS THAT IMPACT PREDICTIVE MODELS. Author: Kimberlie Staheli; Armin Stuedlein |
Intl No-Dig-2019 Florence | Staheli Trenchless Consultant; Geotechnical Engineering Dept, Oregon State University | 2019 | Pipe Ramming and Impact Mole |
The limits of pipe ramming technology are being stretched on a regular basis. Rams are increasingly installed in longer lengths, in more aggressive/dense geotechnical conditions, below the water table, and to installation tolerancesthat allow the installation of gravity pipelines within the rammed casings. Advances to the technology are largely led by innovations in the field, with engineers striving to develop design parameters that model the performance of the technology. In an effort to understand the mechanisms controlling the ramming, three projects were instrumented during construction to gather information. The instrumentation, consisting of strain gages and accelerometers, commonly used for pile driving analysis, were placed on pipe rams ranging from 915mm (36-inch) to 2130mm (84-inch)diameter. Field data from the instrumentation was collected throughout the ramming while detailed field notes were taken, documenting all aspects of construction. This allowed correlation of ramming data with construction activities, andquantification of parameters that impact overall ramming loads.This paper details a case history of an instrumented project, presenting project details such as design parameters, geotechnical conditions, execution of the ramming, groundwater control, and contractor activities throughout construction. Important design parameters that contribute to the success of large pipe ramming projects are presented. The results of the data and ramming activitiesare analyzed to quantify parameters such as hammer efficiency, resistance on the casing, force on the cutting shoe, advance rates, and hammer blows per meter. (click to report an error) more... share... |
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| 2311 | DEMD : Deep Electro Magnetic Detection Author: Alexandre THOURY, Fabrice PONT and Jean François MAREGIANO |
Intl No-Dig-2019 Florence | Jfm Conseils | 2019 | Site Survey / Pipe Inspection |
DEMD "Deep ElectroMagnetic Detection" is an innovation of JFM Conseils, developed and tested for one of the main sewer owner in France (Paris Area). Their problem is to make interventions on laterals, close to the buildings. When the digging occurs, it is commonly found that the lateral is not at the expected place. The electromagnetic solution proposedis free fromnatural physical constraints of detection and can identify wastewater pipes at depths never coveredby conventional non-intrusive network detection equipment.The purpose of the DEMD is to avoid costly interventions with a large footprint and detect and locate deep sewers and blind laterals from the man entry sewer. First trial was made last year. It showed that thelaterals which were supposed to go straight from main to the buildinghad deviations. They can befound 3 meters away from the intended alignment. The trial has shown that this method can locates them with a precision of 10 cm at a depth of 5 m. A larger scale trial is underway is on 200 laterals in a main street. Benefits of DEMD are plentiful and interesting. -It is possible to precisely locate sewer pipes with only one entry point. It works well with blind laterals. It works in dense urban environmentwith lots of subsurface networks. -It allowstolink the detection system with CCTV and make assessment of the condition of the pipe and offer rehab solution to the owner if requested. System is cost effective by providing: a) Avoidance of risky and unnecessarily costly diggings. b) Connection location and assessment. Propose a cost effective rehabilitation method such as lining instead of laterals replacement. (click to report an error) more... share... |
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| 2256 | DESIGN & BUILDING CONTRACTS AS A PERFORMING OPPORTUNITYTO C.I.P.P. SEWERS REHABILITATION -BRIANZACQUE CASE STUDY Author: Mauro Pozzi and Simone Maria Cellitti; Federica Fuselli |
Intl No-Dig-2019 Florence | Department Of Engineering And Spatial Planning, Brianzacque S.r.l; Rotech Srl | 2019 | Cured in Place Pipeliners |
A 3 millioneuros budget, in order to renovate 2.5 km of a large ovoid-shaped sewer, running underneath a densely populated area, those are the key elements on which the case study is based. BrianzAcque, the Brianza County water company, has opted for trenchless technology, to reduce the social costs arising from the building site and to minimize the sewer system down-time. The novelty is not only the complexity of the project, of the technology and of the construction materials, but the contract award procedure: design and building contract. Due to the importance of the rehabilitation, it has been immediately clear that pinpointing qualified and strong players had a strategical significance, with strong innovative capacity, and task oriented. The complexity of the project needed as well an operation team capable of ensuring the coordinated management and able to master from any design steps to the completion goals. Last but not least, it has been set a remarkable overhead waste-water by-pass system up, in order to manage the sewer during the CIPP operation. Design and building contracts, in which two or more companies and designers are bound together to fulfill their obligations, is a useful tool to ensure ahigh quality performance. A highly technical design, with particular regard to materials and static calculation joining a gathered extensive experience are the key success factors of this challenging project. (click to report an error) more... share... |
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| 2247 | Design and Installation of Water Pipeline Renewals Author: Houming Ni , Mohammadrza Malek Mohammadi,Mohammad Najafi, Seyedmohammadsadegh Jalalediny KorkyRamtin Serajiantehrani |
Intl No-Dig-2019 Florence | Asoe Hose Manufacturing Inc.; Dept.of Civilengineering, University Of Texas | 2019 | Close-Fit Linings |
The market for trenchless renewal of water pipelines is growing at a fast rate. Several methods can be used for trenchless water pipe renewal, such as cured-in-place pipe (CIPP), close-fit pipe (CFT), sliplining (SL), pipe bursting (PB), and spray-in place pipeline (SIPP). There are new methods and technologies developing that should be considered for cost-effective and efficient pipeline renewals. As discussed in this paper, one of these methods recently developed is Pipe-in Liner, a new Fabric Reinforced Flexible Plastic Pipe (FRFPP). Among other factors, pipeline renewal design and construction include considerations for structural, semi-structural and non-structural applications as well as flow capacity. The structural application is used when the new renewed pipe is designed as standalone, without consideration of support from the old pipe. The semi-structural design uses the support from the old pipe and the new liner pipe spans the cracks and holes to eliminate leakage as well as enhancing the structural capacity of the old pipe. The non-structural application is used mainly for corrosion protection and water quality applications. The installation of the renewed pipe requires proper selection of renewal method, old pipe inspection and preparation, and considerations for surface access as well as service disruptions and lateral connections. The objectives of this paper include presenting requirements and decisionmaking process for design and installation of water pipeline renewal systems using a new close-fit product. (click to report an error) more... share... |
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| 2255 | Design of liners for circular & non-circular shapes according to the new French ASTEE 3R-2014 V2.0 method - Influence of geometrical imperfections of host pipe & liner Author: Olivier Thépot, Jean-Marie Joussin, Jean-Michel Bergue |
Intl No-Dig-2019 Florence | Eau De Paris; Fstt | 2019 | Cured in Place Pipeliners |
After a brief presentation of the new French recommendation 3R-2014 V2.0 for the design of liners (published in 2017 by ASTEE Scientific and Technical Association for Water and the Environment), the influence of geometrical imperfections on the resistance of linings to the groundwater pressure is presented. In the 3R2014 method, imperfections are treated using single analytical reduction factors or combined analytical reduction factors. Imperfections are classified in two types: global imperfections like gap or ovality and local imperfection like intrusion. Global imperfections are uniformly distributed around the perimeter. Local imperfections are distributed on a limited angular sector It is shown that geometrical imperfections dramatically decrease the buckling resistance of lining and increase the stresses. For egg-shaped lining, variation of the radius at the sides and annular remaining gap may also have a big influence on the bucking resistance. Since it is not always possible to estimate imperfections, the default values play an important role, since they limit overly optimistic behavior and ensure coherence between the different methods of calculation. For common circular and 3 x 2 egg shape pipes & liners and prefixed imperfections it has been established a good correspondence between the DWA A 143-3 calculation tables and the French method calculations result. European Standardization working covering the liner design is starting now and the new French method will provide a good basis of discussion within the dedicated working group. (click to report an error) more... share... |
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| 2289 | E-Power Pipe®: Jet Pump Technology for long-distance drives in small diameters Author: Dr Marc Peters |
Intl No-Dig-2019 Florence | Herrenknecht Ag | 2019 | Microtunneling and Pipe Jacking |
In Slurry Microtunnelling the slurry pump system is one of the decisive parameters in terms of drive length, especially when small diameter projects are discussed. With conventional centrifugal pumps, the drive length is so far limited to approximately 100 meters in small diameters below 800 mm inner diameter. The Jet Pump technology is based on a Venturi system, which can be used to accelerate fluids inside the conveying line. The efficiency is such high that distances of up to 1,5km can be accomplished with only one high-pressure pump at the launch shaft. In standard pipe jacking on the other hand multiple centrifugal pumps in the machine or tunnel need to be engaged to overcome such a distance. The jet pump has been first tested by Herrenknecht in conjunction with HDD to extend the application range of HDD in soil formations with higher permeability. In a next step, the jet pump was integrated into the Slurry Microtunnelling machine range creating the AVNS machine designed for drive lengths of 1,000 meters and more. At the same time the demand for small diameter long-distance pipe jacking had been fueled by the decision of the German government together with the Energy companies to install high voltage cables underground. In order to install close parallel underground cable casings with minimal overburden and high precision over long distances, Herrenknecht AG has developed the E-Power Pipe® technology using the AVNS Microtunnelling machine (Ø 505mm) with jet pump system. Meanwhile three projects have been executed successfully reaching drive lengths of up to 700 meters. (click to report an error) more... share... |
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| 2283 | ELECTRIFICATION OF DIRECTIONAL DRILLING MACHINES FOR SUSTAINABLE TRENCHLESS EXCAVATIONS Author: Raffaele Savi, Luca Pugi, Massimo Delogu, Lorenzo Berzi, Francesco Grasso,Enrico Boni, Francesco del Pero |
Intl No-Dig-2019 Florence | E.g.t Srl ; Dipartimento Di Ingegneria Industriale, Università Degli Studi Di Firenze; Dipartime | 2019 | Horizontal Directional Drilling |
Smart Mobility and Communication Technologies are transforming our communities in smart sustainable human aggregates which require continuous improvements in terms of installed communications andservices. These complex network of wires and ducts have to be continuously updated, maintained and repaired considering the increasing obsolescence rate of new technologies. These continuous efforts have to be optimized in order to be sustainable in terms of costs, environmental impact, public soil occupation, perturbation of the complex organization of the involved urban communities. It's also important to remember the fundamental role that an efficient exploitation of natural resources (Water, GeoThermal Energy, etc.) and underground distribution resources, can play in order to produce a sustainable development of human communities. No Dig Technologies represents a clear response to this kind of troubles. In particular, EGT Srl, a consolidated manufacturer of solutions concerning drilling and more generally geotechnical applications, proposes a new generation of directional drilling machines designed to satisfy these incoming challenges. New machines have to be electrified in order to improve environmental impact. They have to be smart and interconnected with a variety of systems and functionalities of Smart Construction Yards to increase safety and optimal resource allocation. Finally, the new machine has to be designed to be a proactive tool able to measure, and collect a large amount of data concerning performed activities and inspected soils. In order to satisfy these ambitious specifications without sacrificing the traditional robustness of machines that have to guarantee high level of reliability even in harsh conditional environment, EGT Srl has to redefine and improve design, manufacturing and maintenance approaches. This effort which is presented in this work is the object of a multidisciplinary interaction with research and industrial partners that are harmonically integrated in the STIGE research program (Sviluppo di Trivelle Innovative per attività Geologiche con alimentazione Elettrica). (click to report an error) more... share... |
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| 2265 | EXPERIENCES WITH REHABILITATION OF POTABLE WATER PIPES IN NORWAY Author: Hendrik Panman |
Intl No-Dig-2019 Florence | Sande I Vestfold | 2019 | Cured in Place Pipeliners |
Norwegian waterworks have, in average, water leakage of approximately 35%. For many years, waterworksand pipe owners have requested money-saving and environment friendly products to renew water pipes. We, the Norwegian contractor Kjeldaas, have been renewing sewage and storm water pipes by CIPP and other methods for several years. Since 2014 we also have been able to install innovative products for potable water pipes. In 2016, we were first in Europe (and second in the world) to install a UV light cured GRP liner with structural strength for potable water - the Saertex-liner H2O. When installing liners in potable water pipe sections with bends, we use the product Primus Line. Primus Line is a flexible sliplining solution for the trenchless rehabilitation of potable water pipes. Kjeldaas would like to share our experiences when rehabilitating potable water pipes with such liners in Norway. (click to report an error) more... share... |
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| 2246 | EXPERIMENTAL CHARACTERIZATION OF MINI-TRENCHES ON ROAD PAVEMENTS Author: Alessandro Corradini, Gianluca Cerni, Federica Ronchi, Diana Salciarini |
Intl No-Dig-2019 Florence | University Of Perugia, Department Of Civil And Environmental Engineering | 2019 | Associated Technologies, Techniques and Equipment |
Perugia is one of the leading cities in Italy that launched itsfiber optic broadband network initiative in 2013, through the use of a new mini-trenching technology, called 1-Day-Dig (1DD) -patented by Sirti, leading Italian company in the infrastructure sector for telecommunications.In this work we present the results of an extended experimental campaign to characterize the mechanical behavior of the materials used for the realization of the 1DD mini-trenching system. Three different types of sample have been collected from the fields and tested: i) samples from theoriginal pavement (benchmark); ii) samples within the trenches; and, iii) samples that include the interface between the original pavement and the installed trenches. The focus of the experimental tests has been the determination of the mechanical stiffness and fatigue characteristics. Despite several heterogeneity in the material response can be observed, due to different building conditions at the sites, overall the performance of the materials within the trenches is comparable to the performance of the ordinary pavements. On the other hand, the interfaces appears to be weaker in terms of adhesion and for this reason,particular attention is paid to this issue during the 1DD realization. (click to report an error) more... share... |
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| 2270 | EXPERIMENTAL STUDY ON PULLBACK LOADS FOR STEEL PIPELINES INSTALLED BY HORIZONTAL DIRECTIONAL DRILLING Author: - Ashkan Faghih; Alireza Bayat; Samuel Wilson |
Intl No-Dig-2019 Florence | Department Of Civil And Environmental Engineering, Universityof Alberta; Cci Inc. | 2019 | Horizontal Directional Drilling |
Pull force estimation during Horizontal Directional Drilling (HDD) is one of the essential steps during the planning and design phases of these projects. Although numerous studies have been completed in an effort to increase the accuracy of the theoretical calculations, the importance of site-specific factors are often neglected which has sometimes led to significant discrepancies between expected forces and observed values during construction. Among many factors affecting pullback force, engineering assumptions are often the same regardless of the project-specific considerations and the scope of the crossing.This paper reviews the design parameters affecting the pull force calculation and compares measured pullback forces and theoretically calculated values for over twohundredcompleted HDD projects. Also, the paper discusses a strain monitoring program which was utilized in several case studies to capture the magnitude of the forces applied to the product pipe. The mechanical stresses calculated from the strain gauges will be used as a basis to determine the portion of the rig pull load transferred to the product pipe and the force required to move the bottom hole assembly and the drill pipes inside the hole. This study will provide an evaluation of the applied tension on the product pipe and suggest modified design parameters for improving the accuracy of the pull force estimations. (click to report an error) more... share... |
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| 2312 | From Hades to Heaven? Developments in integrated buried asset information systems in the UK Author: Jo Parker |
Intl No-Dig-2019 Florence | Watershed Associates | 2019 | Site Survey / Pipe Inspection |
When designing any new pipeline scheme, information about the existing buried assets is essential to ensure that the design is optimized, even more sofor trenchless projects where damage to existing buried assets may not even be identified at the time of the work.With the deregulation of the utilities industry in the UK, where once only a small number of organisations would need to be contacted to obtain information about their assets, now over 100 may own assets in the area under consideration and collating the details can be a timeconsuming and expensive business. In 2006 a research project was launched which looked at the problem of integrating the wide variety of data base systems and structures.This resulted in the launch in Scotland of an integrated web based system in 2012, the Scottish Vault. This has been very successful and is used by all members of the utility and highways community with legislation being introduced to support the timely update of data.In England the development of such a system has been rather more problematic. The issues are not technical but rather organisational and financial. A number of funding models have been considered and some organisations have been established to promote such a system, only to struggle and fail. In 2018 another attempt was made to launch an integrated system for London, named Hades -Highways Asset Data Exchange System. The trial was successful and options for ownership of the data and processes are currently being considered. It is hoped to report on the successful implementation in the presentation.. The presentation will also consider the technical and organisational factors which need to be considered when setting up and the factors which made the Scottish project so successfulsoother countriescanattempt to reach buried asset information Heaven (click to report an error) more... share... |
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| 2324 | FRP 101: TAKING THE MYSTERY OUT OF TRENCHLESSREPAIR OF PRESSURE PIPES WITH CARBON FRP Author: Mo Ehsani |
Intl No-Dig-2019 Florence | University Of Arizona And Quakewrap Inc. | 2019 | Spray-on Linings and Coatings |
Over three decades ago the author introduced the concept of using carbon and glass Fiber Reinforced Polymer (FRP) to the construction industry. In its simplest form, FRP consists of fabrics made with glass or carbon fiber. The fabric is saturated with epoxy resin in the field and applied like wallpaper to the surface of the structure. Within several hours, the epoxy cures and FRP reaches a tensile strength 3-4 times that of steel. While the original applications were on strengthening of beams, columns and walls, the technique has beenused extensively in the US. since the late 1990s to repair pressure pipes.FRP offers a great solution for repair of pipes. Larger diameter pipes can be repaired internally by man entry. For smaller pipes a packer can deliver the materials to the point requiring strengthening. FRP allows restoration of a deteriorated pipe to its original strength. It can also be used to increase the pressure rating of a pipe to levels far beyond the original design capacity. Unfortunately most engineeringprograms do not cover this subject and consequently few practicing engineers know how to exploit the unique advantages of this emerging technology. The presentation will focus on introducing the principles of design, advantages and disadvantages of the system, assuring quality control on the job site, etc. Several case studies covering a wide range of host pipe materials (steel, concrete and fiberglass) and for applications to repair water, sewer and oil and gas pipelines will be presented. (click to report an error) more... share... |
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| 2271 | GAS STORAGE PLANT WITH ANNULUS FILLING Author: Marcello Viti and Marco Berti |
Intl No-Dig-2019 Florence | Anese Srl | 2019 | Horizontal Directional Drilling |
The purpose of the work was to lay,avoiding digging in an urban area for a length of about 730 m, a pipeline in DN850 steel 25 mm thick, as casing pipe fora super-thick steel pipe (32mm) for the transportation ofmethane gas at a very high pressure, according to the project, of about 195barg.The pipeline was intended to convey methane gas into a new gas storage field by connecting the two input and withdrawal clusters.The need linked to the geology of not being able to deepen the laying plan,forced to lay the pipeline at a very limited depth ofabout 6 -7 meters below the road.This depth, considering the hole DN1200 made for the diameter of the DN850 pipe, has suggested that the empty space of the hole filled by bentoniteandmudalone, could be subjected to high stresses due to surface traffic, which could generate settlements on the portions of ground and also affect the road surface.Sotoavoid any sagging / swelling of the road surface, an accessory work has been planned, consisting in the installation of two"Tubes A' Manchettes" of 3" welded on the external wall of the DN850 pipe distributed at 120 °, about 70 meters long, equal to the crossing of the road. The purpose of the TAM was to injecta cement mixture into the gapby displacing the portions of bentonite mud in order to fill and consolidate the empty space between thewalls of the hole and the pipe;guaranteeing the hole stability of medium / long term and ensuring the holding of the road above (click to report an error) more... share... |
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| 2313 | GPR and PIPELINE & CABLE LOCATOR DEVELOPMENT Author: Masaru Tsunasaki, Shintaro Hiromori and Takaharu Nakauchi |
Intl No-Dig-2019 Florence | Gas Network Division, Osaka Gas Co. | 2019 | Site Survey / Pipe Inspection |
Osaka Gas has been developing 'GPR' and Pipeline & Cable Locator, hereafter 'PCL' for many years. Since 1982, 296 GPR sets and 574 PCL sets have been adopted by Osaka Gas. The latest GPR enables pipe detection automatically by simultaneous image processing. The latest PCL's phase detection enables identifying the target pipe from the adjacent conduits. This paper describes the recent developments and case studies of these two machines. (click to report an error) more... share... |
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| 2272 | HDD DRILLING IN HARD AND HARDEST ROCK IN EUROPE - EXAMPLES OF JOB SITES Author: Hans-Joachim Bayer |
Intl No-Dig-2019 Florence | Tracto-technik Gmbh & Co Kg | 2019 | Horizontal Directional Drilling |
For almost two decades, rock drilling is possible using the HDD technology. In the first 10 years, this was only possible with mud motors and in rock formations of low to middle compressive strength. For drilling through hard rock, new HDD technologies were required and this became possible just in recent years by means of the twin-tube technology, combined rock breaking equipment, new types and configurations of tools, new and advanced bit elements and inlets, optimized machine performance and improved drilling fluids. The hardest rocks in Europe exist in Scandinavia, the central Alps and some other outcrop regions of magmatic and metamorphic rocks. Exactly in these areas, which used to be "no-go areas" for HDD technology, many challenging and sophisticated rock drilling jobs were carried out in recent years. Some ofthem will be presented at this NoDig Conference. The featured jobsites were in Finland (ultra-hard rock), in central Switzerland (Berner Oberland), in the Hohen Tauern of Austria, in the German Ore Mountains (Erzgebirge) and in some basaltic massifs. As these projects were executed in mountains and high mountain regions, they were challenging not only regarding the tough ground but also in terms of the overall jobsite conditions. (click to report an error) more... share... |
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| 2273 | HDD MARSDIEP CROSSING BETWEEN DEN HELDER AND TEXEL, LENGTH = 4,600 m Author: Ernst Fengler |
Intl No-Dig-2019 Florence | Lmr Drilling Gmbh | 2019 | Horizontal Directional Drilling |
PWN, the major water supplier in the North of the Netherlands, had to replace a main water supply line between the harbour of Den Helder and Texel island. The length of that line is almost 5000 m and most of that line is placed below the seabed. As such, surfaces are not accessible. After investigating multiple installation techniques to solve that challenge, the decision was made to do test drill operations for confirming the feasibility of HDD. Those test drill operations, done in 2015, by two different contractors, showed that HDD is a reasonable approach. As a consequence, the tender was published, and bits were handed in. After some negotiations the subject HDD contract was awarded to LMR Drilling. Eight months period of profound engineering was used to prepare this project and to cover almost all eventualities. Construction began in spring 2017. Drilling operations for that 4600-m-long crossing took only three weeks. This outstanding job was a great achievement for the HDD industry in Europe. (click to report an error) more... share... |
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| 2274 | Horizontal directional drilling, pipeline installation by pulling or pushing Author: Henk Kruse; Jorn Stoelinga |
Intl No-Dig-2019 Florence | Deltares Department Of Geo Engineering; Lmr Drilling Gmbh | 2019 | Horizontal Directional Drilling |
The success of a horizontal directional drilling is largely dependent on thesuccess of the installation of the product pipe, which is installed in the created borehole.The costs of damaged pipelines and the costs for additional measures during and afterthe pipeline installation can be considerable. In order to reduce the unexpected costsrelated to problems during the pipeline installation, a detailed analysis of the installationforces should be carried out. Nowadays the pipeline installation can be performed by thenormal pull back operation or by pushing the pipeline forward in the created borehole.Since the behavior of the pipeline, which is pushed forward by a thruster at the entrypoint, is different from the behavior during pulling, the right prediction model for the soil-pipeline interaction during installation should be used. The prediction results of theinstallation forces using the available models for pushing and pulling the pipeline are inline with the measurements of pulling forces and thrust forces. (click to report an error) more... share... |
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| 2257 | HYDROELECTRIC PIPELINE REHABILITATION, BLUELINE-UV LINER SYSTEM Author: Dario Dalla Corte, Vicentini Matteo, Paolo Chemello, Federica Fuselli |
Intl No-Dig-2019 Florence | Enel Green Power; Rotech Srl | 2019 | Cured in Place Pipeliners |
The rehabilitation of the hydroelectric pipeline in Agordo was planned in 2017 and realizedafter one yearin 2018. The presence ofundergroundutilities, roads andprivate propertiesmade the solution of replacing the existing pipeline with a newoneeconomically unfavorable, therefore, theproject was oriented towards NoDig technologies. In particular, the followingtwosystems were considered:the inversion system (BlueLine) and the PressureUVLiner System. The client compared thosetwotechnologies in order to make the choicethatwastechnically more appropriateand respected the needs of citizens in the best possible way. Despite the experience in the field ofinversion systems, the first choice fell on the UV systemthatcould guarantee greaterlengths, around 230 m, without foreseeing excavations that would have affected private properties. The BlueLine could not ensure suchlengths as the UV System and additionally, it would have also foreseen the use of a very biginversion drum. After a meetingwith theproducer of theUV Liner, other problems have arisen, such asexcavations with dimensions, about 3metresbiggerthan the ones already planned, the presence of two curves, with 15 and 33 degrees,where the UV lamps could have damaged the liner andthe irregularities insidethe existing pipeline. The client decided uponthe UV technology, but unfortunately, due to a fire in the manufacturing company and the strict time tableof the rehabilitation, the final decision fell onthe BlueLine Systemin agreement with the owners of theprivateareas.The technology was flexible and suited to asuccessful project (click to report an error) more... share... |
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| 2268 | INNOVATION FOR THE ENVIRONMENT: THE EXPERIENCE OF MARCHE MULTISERVIZI S.P.A. Author: Niko Bruni |
Intl No-Dig-2019 Florence | Marche Multiservizi S.p.a. | 2019 | Horizontal Directional Drilling |
"Innovation to reach excellence, to reduce environmental impact, to optimize costs and improve efficiency". Innovation has always had an important role for Marche Multiservizi S.p.A., the biggest multi service provider of the province of Pesaro and Urbino. Our Company has always invested in research and technology to develop the services it manages within its territory. Its activities contribute to the growth of the territory it manages. The study developed by the Engineering and Construction Department of Marche Multiservizi, fits into this context, with the mission of improving the cost-benefit analysis that compares the traditional pipe laying techniques with trenchless technologies, with a focus on Horizontal Directional Drilling technology (HDD). The research concerned three fundamental variables to choose the best method to lay high-density polyethylene water pipes (HDPE) with an external diameter of 110mm, the cost of the intervention, the duration of construction and CO2 emissions. With regards to the first two variables, the results show that it is advantageous to adopt HDD technology for interventions of 100 m or more, as opposed to traditional open-dig excavation techniques. Using trenchless technology, the costs are similar, but the execution times are considerably lower. The most interesting result was obtained in the analytical quantification of CO2 emissions determined for the two different laying techniques (HDD vs open dig) applicable for the construction of a 1,000 m aqueduct in HDPE - with an external diameter of 110mm. It was found that the Horizontal Directional Drilling technology involved a considerable reduction in CO2 emissions equal to 68 tons of CO2, considering Equivalent Tons of Petroleum (TEP) and Embodied Carbon (Kg CO2e/Kg) for each type of material and the various machines used in each construction process. The result corresponds to the emissions produced by the annual electricity needs of about 71 families, an environmentally favorable result. (click to report an error) more... share... |
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| 2284 | INNOVATIVE MONITORING OF RAILWAY TRACKS DURING TRENCHLESS CROSSINGS Author: Jack Butterworth |
Intl No-Dig-2019 Florence | Lynx Plus Sas | 2019 | Horizontal Directional Drilling |
Railwayauthorities around the world are awareofthe risksfromunderground crossings by micro-tunnelling, HDD or other techniquessuch as augerboringetc.It hasbecomevery important to provide true and consistent monitoring of railway tracksas crossings are installed.Theexistingstate of the art in monitoringtechnologies isnot fail proof. The most commonlyused type of technologyismotorized total stations. Theseprovide measurements in the three dimensionsof space. Unfortunately,in some circumstancesthey are not to be relied upon beingsubject to weather conditions. Whenever rain snow fog moisture frost high temperatures or any obstacle interferethen the measurements cannot be trusted even ifavailable.Two monitoring innovations were developed specifically for the safety of rail transport.LYNX Ariane is independent of weather conditions,has the required accuracy and fast measuring frequency. It measures all the required parameters (x,y,z) It is based on a reference line parallel to the rails with both ends anchored outside the crossings influence zone. This line runs through specific sensors fixed to the rails at set distances. Any deformation ofthe rails causes an identical displacement of the sensors which is data logged and eventuallyan alarmis sent.LYNX Boogie is intended to monitor the deflation (settlement) of the rails as a train passes. This equipment is used as a maintenance tool indicating where ballast is failing. It can also provideuseful and additional data to LYNX Ariane since rail deformation reaches its peak as a train passes. (click to report an error) more... share... |
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| 2299 | INSTALLATION OF PRE-SUPPORT STEEL PIPES TO PROTECT AN HISTORICAL BUILDING BY A RETRACTABLE MTBM Author: Riccardo Miotto |
Intl No-Dig-2019 Florence | P.a.t.o. S.r.l | 2019 | Microtunneling and Pipe Jacking |
As part of the modernization of the "Piazzale Flaminio - Riano" section of the "Rome - Civita Castellana - Viterbo" railway line, the new Piazzale Flaminio railway station has to be built. The station atrium represents a particularly delicate underground work for the urban context in which it is located, above all for the interference with pre-existing historical buildings. In the initial stretch, the station galleries undergo the historic building of the former CNEL Library with very low coverage. In order to minimize the effects induced by the construction of the station galleries, their excavation must be preceded by the laying of 36 steel pipes DN 800 mm, horizontal and side by side but detached and independent, with a pre-support function, having a length of about 50 m each, drawing the upper contour of the three tunnels (see photos), finally filled with concrete. The installation of the steel pipes was performed by the company P.A.T.O. Srl through a Micro Tunnel Boring Machine (MTBM) designed and created ad hoc - for the first time in the world - for this project, where it was necessary to guarantee at the same time: o auger dry excavation, not to "disturb" the ground and the foundations of the building, intersected in some points o retractable MTBM, due to the impossibility of realizing a MTBM extraction chamber for archaeological and environmental reasons o MTBM guided and able to guarantee the design position of the drilling axis with a maximum deviation of 20 mm. The 36 drilling operations were completed in a total time of 45 weeks, including the resolution of unforeseen events, one of which was caused by an earthquake that permanently blocked the advance of one of the steel pipes during drilling. (click to report an error) more... share... |
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| 2298 | Investigation of Cracks Found in the Circumferential Direction on Jacking Pipes Author: Yuki Kaneshiro, Jun Ozaki and Masahiro Yoshimoto |
Intl No-Dig-2019 Florence | Tepco Power Grid | 2019 | Microtunneling and Pipe Jacking |
In the urban area which TEPCO Power Grid supplies electricity, pipes and tunnels are buried underground for electric power cable accommodation. Since the urban area is teeming with traffic, these tunnels are constructed utilizing trenchless technology such as pipejacking from the view of avoiding traffic congestion. During the construction of a tunnel by pipejacking in Kanagawa prefecture, some cracks occurred on pipes. This pipe was about 500 m in length and 900 mm in diameter, including a sharp curvature of 60 m radius. These cracks were mainly found in the circumferential direction, where the curved sections were. To investigate the causes of these cracks, the following procedure was taken: (1) find similar cases in the past; (2) clarify the characteristics of these projects; (3) interview the pipe manufactures and contractors; (4) list up the possible causes of cracks; (5) narrow down the causes of cracks by testings; and (6) determine the cause of cracks. In order to identify the cause of cracks, experiments using a full-scale model and numerical analysis were conducted to reproduce actual phenomena. This report also includes measures for preventing the same kind of trouble. (click to report an error) more... share... |
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| 2258 | Joining methods for CIPP products in pressure pipe systems Author: Federica Fuselli, Jens Wahr |
Intl No-Dig-2019 Florence | Rotech Srl; Diringer & Scheidel Rohrsanierung Gmbh & Co | 2019 | Cured in Place Pipeliners |
At the transfer points to the existing network and at the connections to the individual sections to be renovated, the trenchless renovation of pressure pipes using CIPP systems requires reliable connection technologies which are also adapted to the respective renovation system. Through these connections, a complete system can be integrated into the existing pressure pipe network.Solutions are employedsuchthat, depending on the requirement, either include the existing pipe's support orfunction completely independent. Depending on the condition and material of the ends of the old pipe, these can be further used as a sealing and supporting element, only as a longitudinal anchor or be completely discarded. The latter permits solutions that require no leakage and tensile strength that is only acquired by using new components.Thereby, system checks and approvals of the respective system liner/connection form the basis of the longevity of these interfaces to be able to ensure the appropriate application. Thisapplies in the case of increased requirements, e.g. due to dynamic loads and/or high-frequency of load changes which, in the meantime, are taken into consideration in the actual test programs. The company D&S GmbH & Co KG and their Italian subsidiary, ROTECH SRL, are the driving force and attendant in the development of these innovative technologies. The lecture indicates the requirements, checks and the options, describes the selection criteria and illustrates thetechnologies based on the project examples.The technical options and classifications presented here are performed based on the RSV information leaflet "Renovation of sewage pressure lines and pressure hose liners", which the author also helped to produce. (click to report an error) more... share... |
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| 2314 | Leak detection using helium as a tracer gas and the primus line solution for pipe rehabilitation Author: Avishay Schnaidman |
Intl No-Dig-2019 Florence | Vp- Trenchless Pipeline Rehabilitation | 2019 | Site Survey / Pipe Inspection |
utility providers around the world are challenging with leaks of aging water infrastrucutres. Crinking water is a precious resource and should be protected from being in the pipe system. There is an ongoing struggle to locate leaks and reduce water loss to the least possible. Most common leak detection technologies are based on acoustic system but experience shows that they may lead to inaccuracies due to interference with external noise, low pressure in the network, plastic pipes and limitation of the physical principle of sound propagation, therefore insufficient in order to detect sounds produced by water leakage. The paper will show the process of leak detection usign Helium gas in an under pressure operating water main. , firthermore, the paper will present (in general) the Primus Line solution to potential leaking pipes in general. The paper will present a case study on the trenchless rehabilitation of water mains using the Primus Line system. The case study will demonstrate that it is possible to rehabilitate a (a "wag") 530m of DN350 PN16 water main located in the middle of an urban area with 9 bends of up to 45 degrees. The paper will conclude with the advantages of this leak detection method. (click to report an error) more... share... |
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| 2321 | MECHANIZED PIPE REHABILITATION DESIGN AND CASE STUDY Author: Ladan Sahafi; Chris Sivsend |
Intl No-Dig-2019 Florence | Americore International; Akkerman Equipment | 2019 | Slip Linings (Loose Fit) |
Larger diameter sanitary sewer pipelines may be re-lined with Glassfibre Reinforced Polyester (GRP) pipes using specialty made sliplining jacking machines. While winches and or hydraulic jacks have been used to pull or pushed GRP liners into existing sewers, these systems are less effective in larger diameter >DN1600 mm (66 inches) and greater, especially with rapid live flows present and not bypass pumping in place. In the United States, the contractors use large sliplining machines with twin hydraulic motors and synchronized caterpillar chain drive to traverse the pushing arm at the flow level in both upstream and downstream directions in a very rapid manner. This method allows for sewer to be in full service and causes no interruption to service in live flows without a need for bypass-flow pumping systems. The cost savings of long-distance pushing (jacking) in live flows without bypass and controlled jacking loads and speed are a few of the benefits of these new highly mechanized systems. The longest drives to date utilizing GRP pipes are as follows; 1700 meters (5,200 LF) DN1250 mm (51 inch) 1370 meters (4,500 LF) DN1400 mm (57 inch) 761 meters (2,500 LF) DN2500 mm (96 inch) This paper will discuss the design and construction of such sliplining machines and field assembly and operations of the method that was utilized in Oakland, California; 3rd Street Sewer Rehabilitation project. Challenges and success of the project will be discussed, and future upgrades to the system will be considered. Use of modern automated pipe relining equipment and high strength GRP jacking pipes results in an overall cost effective solution to CIPP, SPR and other lining methods currently being marketed. (click to report an error) more... share... |
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| 2290 | Microtunneling Projects for Power-Transmission Pipes - Steep Slopes and Casing Technology Author: Masahiro Yoshimoto, Shinjiro Nakamura and Kazuki Kito |
Intl No-Dig-2019 Florence | Tepco Power Grid, Inc | 2019 | Microtunneling and Pipe Jacking |
The installation design for power-transmission pipes with micro-tunneling sometimes requires steep gradients that are unique to electrical power transmissions. This paper reports some unique projects including an internal casing pipe laying technology, conducted by TEPCO Power Grid. The alignment design for power transmitting pipes does not need to consider gravity slopes which are typical to sewer designs. Therefore, steep gradient lines can be incorporated. As an example of one of the projects of this kind, an installation of 900 mm diameter pipes using mud-slurry micro-tunneling is given. The driving distance was 583 m, the maximum height difference was 18 m (maximum downward gradient of 13.5% and a maximum upward gradient of 8.3%). When the gradient is steep, blockage of slurry discharge pipes can be expected. To prevent the blockage, the rate of curvature at the bottom of the path needs to be lowered. By setting a flat section at the bottom, gravels can be avoided from clogging inside the pipes. As another study case of steep gradient lines, the internal multi-pipe (casing) laying technology was employed for laying four 130 mm diameter pipes into the 800 mm diameter host pipe. The pipes wereassembled on the trolley set at the shaft, and the pipes were pulled in together to the host pipe. This technology made possible the long-distance pipe-laying installation, which led to the availability of long micro-tunneling projects for this purpose, exceeding 500 m in length (click to report an error) more... share... |
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| 2263 | New Performance of a NO-DIG Technology: Pipetronics eMULTI-one Robot-System with extended applications Author: Christian Noll |
Intl No-Dig-2019 Florence | Pipetronics Gmbh & Co. | 2019 | Cured in Place Pipeliners |
Worldwide unique: One system for filling, grouting and mounting top hat profiles for circular and egg-shaped pipes. Pipetronics turns the pipe robot unit into a complete system: PI.TRON3-Three functions in one: milling, grouting, hat profile. Also newly developed was the chassis for egg shaped pipes. This was completely redesigned and equipped with electric drives forheight adjustment and stabilization in the pipe. So far, this chassis was available only in a purely mechanical variant. Thus, the technology PI.TRON3is used in addition to circular profile in egg shaped profile as well. (click to report an error) more... share... |
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| 2236 | NEW TECHNICAL SOLUTIONS FOR THE BURIAL OF DISTRIBUTION NETWORKS: BENEFITS AND REASONS WHY Author: Luca Venturi; Valeria Nascimben |
Intl No-Dig-2019 Florence | Langmatz Gmbh; Outline Srl | 2019 | Asset Management and Work Planning |
The electricity and telecommunications networks have been characterized in recent years by an important development in particular within Italian urban centers: on the one hand the main telecommunication operators have ventured into the construction of their own infrastructures to host fiber optic access networks.On the other hand, the growing demand for electricity from domestic and industrial users is calling for a constant expansion of the distribution network.Especially in the areas with the highest density of housing, the consequence of these two phenomena is the overlap, of parallel and duplicated networks and the consequent proliferation of infrastructural elements above ground, with both aesthetic and functional evident impacts on urban furnishings and the creation of superfluous architectural barriers.In the comingyears this phenomenon will be steadily increasing dueto further investments planned for the development of broadband networks (optical fiber and 5G),the spread of electric vehicles and the related public charging stationsand the adoption of "intelligent infrastructure elements" for the development of Smart City projects.The purpose of this document is the presentation of possible technical interventions for the burial of infrastructural elements today housed off-road (such as mobile radio cells, distribution cabinets, meters ...) and the consequent advantages deriving from the adoption of thenewtechniques, in terms of:o Improvement of the impact on urban furnitureo Reduction of obstacles and architectural barrierso Greater environmental sustainabilityo Reducinginterventions for the laying of the infrastructures and consequent decreaseof the execution time of the road works and related costso Increase of infrastructure securityo Increased resistance to environmental degradation and vandalismo Reduction of maintenance interventions (click to report an error) more... share... |
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| 2315 | NO-DIG INVESTIGATION AROUND PALAZZO VECCHIO, FLORENCE ITALY Author: Massimo Coli, Marco Tanganelli, Vincenzo Sapia, Valerio Materni, Fabio Giannattasio and Marco Marchetti |
Intl No-Dig-2019 Florence | Department Of Earth Sciences, Florence University; Department Of Architecture, Florence University | 2019 | Site Survey / Pipe Inspection |
Palazzo Vecchio, at Florence (Italy) date back to 1299 when Arnolfo di Cambio built its foundation onto Roman and Medieval ruins. During centuries,the Palace had been enlarged incorporating adjacent buildings until occupying an entire city block; in the meanwhile, the buildings all around had been dismantled for creating the Piazza della Signoria. Recently, in needs for detailed study regarding the subsoil of the area, we opted for the execution of no-dig geophysical investigation suitable to giveinformation about the presence of ruins and to map shallowbedrock. For this target, we acquired fast and non-invasive geophysical data by mean the capacitive coupled resistivity method,usinga multi-receivers array and a 5 m dipolar transmitter (OhmMapper system by Geometrics) along two sides of the Palazzo Vecchio and acrossPiazza della Signoria. Raw data have been processed to remove outliers, and then analysis modeled to recover the subsurfaceresistivity patternup to about 5 m below the street datum, about at the supposed level of the pre-Roman natural ground. The 2-D resistivity sections show the presence ofa heterogeneous resistivity distribution highlighted by both horizontal and vertical sharp contrasts with no evidence of a flat and continuous bedrock. These geophysical anomalies can be reasonably attributable to dismantled buildings ruins. Geophysical resultshave been comparedwith ancillary information,either geological or archaeological,with the aim to classify and characterize related geologicaland archaeological features. The adopted geophysical approach rapidly providesuswith the very near surface geophysical picturesbelow and around the Palazzo Vecchio, contributing to enhance the subsoil knowledge of the area with a quick and cheap no-dig investigation methods. This result can guide both addressed archaeological in situ investigation and sub-service excavation worksavoiding damaging archaeological features (click to report an error) more... share... |
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| 2267 | No-dig renovation of pressure pipelines, re-connection techniques and case studies Author: Firmino Pires Barbosa |
Intl No-Dig-2019 Florence | Reline Aptec Gmbh | 2019 | Cured in Place Pipeliners |
The trenchless rehabilitation of pressure pipelines is nowadays possible with various systems based on different materials. Since the pressure pipeline network is not using manholes or shafts for connecting and diversion of the flow, the re-connection of relined pipelines is a big challenging demand for successfully conclusion of such no-dig renovation projects. Based on the GRP hose liner of RELINE APTEC, we will present various connection systems in detail. The use of the re-connection techniques depends on the material and on the condition of the pressure lines to be renovated, as well as on the static design requirements for the lining system: independent and self-supporting liner or interactive and semi-static liner. The application of GRP hose liner for renovation of pressure pipelines is increasing the choice of systems and the alternatives for optimization of the design and the cost effectiveness of a no-dig renovation project.Liner end sealing with the so-called liner inner sleeves transmits the force stresses onto the existing old pipe. However, most of the cases, the decision for renovation of the existing pipelines is due to high corrosion and subsequence bursting issues. Therefore, this solution is very restricted in its application. A more technically sensible solution is the re-connection of the liner with flanged GRP couplings. These GRP couplings either can use loose flanges or monolithically pre-produced flange adaptors. In some application, it can be necessary to strengthen the re-connection to the liner with additionally manually laminated glass fiber. The sealing of the liner edge to the flanged GRP coupling is the key role in this application. It is necessary to provide a vacuum resistant sealing of the liner end to the flanged GRP coupling, to avoid at any circumstance a pealing of the liner inner coating. The application of the above-mentioned re-connecting techniques is described in detail as following with references to the job site respectively. (click to report an error) more... share... |
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| 2237 | NOVEL BUSINESS MODELS IN SUPPORT OF TRENCHLESS CITIES Author: Chris Rogers, Aryan Hojjati, Ian Jefferson and Nicole Metje |
Intl No-Dig-2019 Florence | Department Of Civil Engineering,university Of Birmingham | 2019 | Asset Management and Work Planning |
It has been stated that we are less in need of novel construction technologies than we are of novel business models. This paper argues that this truism is especially relevant to the trenchless technology industry -there is a remarkably comprehensive range of trenchless technologies that could be applied in urban settings to minimise the short-term disruption and long-term damage to society and the streets that serve them. However the fact that they are not routinely and universally used points to major deficiencies in the business models adopted when urban engineering works are proposed. This paper presents a new approach to the development of alternative business models that capture not only the direct and indirect costs of engineering works, but also the broader social and environmental costs.In essence it identifies all of the potential benefits that the engineering works might bring about and balances them against all of the adverse consequences of the works. To do this, a process of system mapping needs to be undertaken such that all of the systems that are influenced by the engineering works are identified, and the points of dependency and interdependency are understood. These are opportunities for value creation or adverse consequences to arise -negative value, if you wish.Once this value framework has been established, it is then possible to change the elements within it by adjusting, iteratively, the engineering designs. By making transparent the full consequences of alternative engineering approaches to solving any particular problem -repair, upgrade or installation of a pipeline for example -it becomes more difficult to justify short-term cost-saving expedience when long-term damage is manifestly an outcome. This therefore supports a move towards proactive asset management, such as the introduction of swarms of miniature robots to assess pipeline condition -new research that will be presented as an example (click to report an error) more... share... |
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| 2264 | Numerical Analysis of the Behavior of Pressurized Underground Pipelines Rehabilitated by Cure-In-Place-Pipe Method Author: K. J. Shou and C.C. Huang |
Intl No-Dig-2019 Florence | Department Of Civil Engineering, National Chung-hsing University | 2019 | Cured in Place Pipeliners |
Due to the humid climate in Taiwan area, the underground pipes are prone to be damaged by corrosion, which could be more severe for the environment with high salinity near the coast. In addition, the arrangement of underground pipelines in Taiwan area is complicated because the installation of those pipelines is short of long-term planning. In this study, the numerical simulation software ABAQUS was used to simulate different geometries of underground pipelines, i.e. straight line and curved pipeline, damaged by corrosion. The stress and displacement behavior was analyzed for scenarios with different internal pressure and surface loading conditions. In addition, the performance of the Cure-In-Place-Pipe (CIPP) on those scenarios was further analyzed. The results suggest that properly installation of CIPP can reinforce the damaged pipe by reducing the stress concentration and reducing the differential displacement. (click to report an error) more... share... |
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| 2248 | PALERMO RENOVATES WATER MAIN TO COPE WITH SEISMIC ACTIVITY Author: Arnold Cekodhima |
Intl No-Dig-2019 Florence | Danphix S.p.a | 2019 | Close-Fit Linings |
The paper presentsthe unique rehabilitation project of one of Palermo's most important drinking water pipeline. Thanks to this project, the city of Palermo avoided the water emergency during a period of great drought. The high-level engineering design together with the creativity of a "non-standard" technical solution has allowed DanphixS.p.A.to prevent the possible water emergency by raising the bar as far as the trenchless pipeline rehabilitation is concerned. (click to report an error) more... share... |
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| 2326 | Pipe Preservation during Trenchless Installations:There's No Need to Take Unnecessary Risks Author: Cristian Grecco, and Falko Wiethoff |
Intl No-Dig-2019 Florence | Tdc International Ag; Technical Duroplastic Constructions Gmbh | 2019 | Testing & Assessments |
Corrosion is the first cause of pipeline incidents, and one of the most important responsibilities of a pipeline engineer is to choose the right strategy to protect the pipes from it. In trenchless installations, this aspect is even more important as interventions are not possible during the design life of the pipeline and usually such crossings are located in environmentally sensitive areas. Currently, pipeline operators and designers choose between very robust versions of three-layer polyolefin (PE/PP) coatings, hoping the additional thickness will compensate material losses due to abrasion during installation, and relatively thin coatings with very high adhesion properties. In such situation, they expect the coating to perform better in combination with a cathodic protection system in the areas where the steel was exposed due to damages to the coating. In both cases, practical experience has shown that damages cannot be avoided. Currently, specifically on pipes that are installed by trenchless processes, the available methods for identifying wherethe coating damaged cannot provide absolute or accurate information on the location, size and geometry of the damages. Moreover, even thoughcathodic protection verification at HDD locations can be validated close to the starting and final points of the crossings; the region between can only be assumedand thus a questionable strategy.This paper gives evidence on why these strategies are not valid and provides a technical comparison of properties between pipeline coatings used in trenchless installations. It also introduces an engineered mechanical protection system that has been successfully used by German companies for the past 20 years with an impeccable track record. Such a solution is of particular importance to allow the trenchless industry to achieve longer and safer crossings. (click to report an error) more... share... |
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| 2259 | PIPE REHABILITATION SYSTEMS - HOW DO YOU ENSURE THE SYSTEM WILL WITHSTAND THE RIGORS OF DAY TO DAY OPERATION AND MAINTENANCE Author: Richard Swan |
Intl No-Dig-2019 Florence | Picote Solutions | 2019 | Cured in Place Pipeliners |
Picote specialise in pipe cleaning, descaling and the rehabilitation of pipes using a combinationof Cured-in-Place linings (CIPP) and the Picote Brush CoatingTM System. To undertake this type of work Picote has developed a range of "High Speed" pipe cleaning machines and tooling to enable works to be completed quickly, with minimal disruption and without the need to use water, for pipes from diameters DN32 up to DN300.Whether a cured-in-place (CIPP) lining is installed or the pipes are coated using a spray or brush applied coating system it is generally given that the system has a design life of 50 years. However, design engineers and end users rarely consider the important question of whether the system can withstand the rigors of every day to day use and maintenance over the design period.This technical paper will discuss the following test requirements to determine the suitability of any pipe rehabilitation system: oResistance to high pressure water jetting (HPWJ): The test method and pass criteria to be the same as thermoplastic pipesoAbrasion testing: The test method used to assess the resistance of vitrified clay, GRP, concrete and PVC drain and sewer pipes to abrasion by sediments which can also be used as a general abrasion test for CIPP liners, pipe coatings, etc. Finally we will discuss how the Picote Brush CoatingTM System withstood the rigars of the tests which were undertaken by WRc (Water Research Centre). (click to report an error) more... share... |
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| 2328 | Pipe-filling method for stabilizing empty ducts from the manhole Author: Kenji Hiyoshi and Masashi Shintaku , Keitaro Dekai and Noriyuki Ishizu |
Intl No-Dig-2019 Florence | Ntt Access Network Service Systems Laboratories; Airec Engineering Corporation, Tokyo | 2019 | Associated Technologies, Techniques and Equipment |
We have developed a cost-effective technique for reinforcing RC pipes by using a robot to fill them with mortar from the inside of an existing manhole (L2.3 m × W1.3 m × H1.5 m). This technique was put to practical use in the fieldin the first quarter of 2019.Telecommunication ducts are used for storing and protecting cables, and in places where the ground condition is soft orneeds special care, these ducts are laid inside an RC pipe (where they occupyapproximately15% of the pipe cross-section). When they were originally installedsome 40 years ago, the demand for telecommunication networkswas high,and thus the RC pipeswere installed with empty spaces for future duct installation. However, over time, narrower and higher-capacity cables became available, reducing the demand for further duct installation. Furthermore, sincetheseRC pipesare liable to become increasingly dilapidated, the utilityowner decided to fill the empty spacewith mortarin order to stabilize the ducts/pipes permanently.The key technical points of this technology are as follows: 1) Use of a robot to drill a hole (diameter 75 mm) in an existing duct, through which the RC pipe is filled with mortar, 2) Development of an anti-washout mortar that can fill RC pipes even when there is water inside them, 3) Establishment of a method for checking the airtightness of ducts, and 4) Establishment of visual methods for determining operating procedures and checking the progress of work (including the completionof hole drilling and filling operations).By using this technology, telecommunication facilities can be maintained safely and cost-effectively with less environmental disruption. (click to report an error) more... share... |
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| 2285 | POLYMERIC ALLOY PIPE WITH RESTRAINT JOINT SYSTEMFOR HDD APPLICATIONS Author: Gianfranco Battaglin and Nicola Melotti |
Intl No-Dig-2019 Florence | Fitt Spa | 2019 | Horizontal Directional Drilling |
FITT BLUFORCE RJ is a range of polymeric alloy pipes with restraint joint system. The polymeric alloy consists of unplasticized polyvinyl chloride (PVC-U) and chlorinated polyethylene (CPE): this mix allows for obtaining pipes capable of guaranteeing excellent performances in terms of resistance to crack propagation, ductility and resilience - besides resistance to crushing, corrosion, chlorine and impermeability to pollutants. The system can work continuously at a pressure equal to nominal pressure (PN), supporting the axial load generated by it, and it can work in depression up to -0,8 bar. The joint is equally well performing even for short periods at pressures higher than the nominal one, with resultant axial load reaching up to 440 kN (PN20 in the case of OD400). In trenchless applications, FITT BLUFORCE RJ is a decisive solution for applications on soft or sloping terrains and for direction changes. In those highly technical applications, FITT BLUFORCE RJ fully unleashes its innovative potential, which translates into tangible advantages:- reduction of pipe laying times: thanks to the socket joint, the bars can be assembled during the pulling phase, uninterruptedly;- compact work site: the 6-metre bars minimize the site's bulk - a critical factor especially in works on roads;- no special processes on-site: since there is no need for welding, it is not necessary to use special equipment nor qualified workers;- system flexibility: the combination of the restraint joint angular deflection and the ductility of the polymer alloy bar results in reduced bend radii values;- innovative technical solutions for trenchless technologies: FITT BLUFORCE RJ is the world's first polymer alloy pipe with restraint joint and it is the first polymer-based pipe ever made in Europe.Technical and economical comparison between polymeric alloy and other used pipe technologies have been performed to highlight advantages and disadvantages. (click to report an error) more... share... |
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| 2260 | Quality Control Factors of CIPP Construction Management for Water Main Rehabilitation Author: Wei-Cheng Chen, Yu-Chin Lin, and I-Chun Chen |
Intl No-Dig-2019 Florence | Taipei Water Department; You Tai Feng Technology Co | 2019 | Cured in Place Pipeliners |
Cured-In-Place Pipe (CIPP) technology is worldwide conducted to various pipeline rehabilitations. CIPP entire projectscombine the expertise of material chemistry, pipeline techniques, and civil constructionin water main rehabilitations.Due to the requirementsof high technique level, insufficient training for construction, the restriction of technical transfers, and the inadequacy of equipmentsresulted from limitations of application authorization, some failure projects occurredin the past years.The problems were, for example, collapse of cured tube, inversionhydrostatic pressure decline, and excessive longitudinal folks etc. Once the lining inversionand solidification operationswere mistaken, the cost of reconstructionand the overdue risk of contract period must be assumed. Therefore, material preparation and on-site construction quality management are essential issues.In view of this, this paper proposedtheframework of quality control factors on CIPP construction management, to establish the relationshipsbetween those key factors by the superposition effect, and three mainoperations including resin impregnation process, on-site inversionprocessand curing process.The quality control factors were discussedby means of thecase studiesof practical projectswith 152m MJP DN1000mm and 94m CIPDN800mm water mains of CIPP rehabilitationsin urban area of Taipei. The quality control factors of water mainCIPP in this paper will provide to help the civil engineersof contractors,supervisory units and owners to establishoverall quality concept of CIPPfor reducing the risk of project failures (click to report an error) more... share... |
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| 2300 | Recent developments of GRP solutions in the booming transportation market Author: Laurent Hesters and Marc Sadok |
Intl No-Dig-2019 Florence | Amiblu France | 2019 | Microtunneling and Pipe Jacking |
GRP pipes of any size or shape have been used for more than 50 years in the water market both in open cut and trenchless ways of installation in the main following fields as sewerage market: gravity collectors, WWTP and pressurized sewer mains including access chambers and ancillaries; storm water market: drainage and collectors and drinking water mainly for water mains Today we see an impressive development of GRP open cut and particularly trenchless pipe solutions in one of the world's largest industries: the transportation market. Transportation sectors range from roads to motorways, airports, high speed and freight railways, urban tramways, container ports, multimodal platforms, ... Transportation is a vital service to every other sector of the economy and massive investments for new and existing infrastructures are made all over the world with objectives of ensuring efficient, long lasting and environmental friendly systems. Among the significant advantages of trenchless GRP solutions, we can mention implementation of an innovating comprehensive solutions (e.g. tailor made for any challenging shape - ovoid, arch shaped...-, OnePass long jacked deep pipelines without interruption of traffic...); clear design in line with severe service conditions (e.g. heavy traffic...); quick and safe installation in complex ongoing sites conditions (e.g. tight schedules constraints...); long life expectancy an environmentally friendly techniques The paper will present how we can apply GRP solutions to the booming transportation market and how we can adapt them to meet its specific needs and constraints. Several case studies jobs will be presented to illustrate this. (click to report an error) more... share... |
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| 2286 | RedEx® Internal sealing collars - Partial Repair and Liner End Sealing for sewage and drinking water pipes Author: Martin Cygiel; Federica Fuselli |
Intl No-Dig-2019 Florence | Pipe-seal-tec Gmbh & Co.; Rotech Srl | 2019 | Cleaning, Localized Repairs and Grouting |
The RedEx® can be used for pipelines DN 800 - DN 6000 and used as liner end collar DN 190 - DN 1200 in almost all tube materials: Steel, Vitreous ceramic, Cast iron, Concrete pipes, Cement mortar, PVC, Asbestos cement, PE, PP, GRP. The cuff is installed by hand, it can only be used for liner end sealing in non-accessible widths DN 190 - DN 800. A confectioned EPDM cuff is set up with stainless steel bands. At a squeezing pressure of 250 bar-350 bar, the sleeve is pressed at a pressure of about 3.5-5.5 bar in the radial direction to the old pipe. Different rubber qualities allow use in media like potable water, service water, waste water, salt water, fuel, gas, acids or oil on request. The RedEx® System is currently the first and only inner sealing system worldwide certificated of 10 Mio. dynamic load changes between 10 bar and -0,9 bar Vacuum in a frequency of 2 Hz. The RedEx system has almost all national and international approvals for the pressure tube and drinking water. The Standard-EPDM and Stainless-Steel rings are usable in temperature from -20°C till 140°C and for compensation of standard-tolerances in the pipe-diameter, pipes with sleeve misalignment and axial offsets. With the special solution RedEx® Connect, dimensional changes (as example DN 800 to DN 1000), larger damaged areas or even drawn bows can be remediated. Egg profiles can be rehabilitated outside the approval up from DN 600/900. (click to report an error) more... share... |
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| 2249 | REHABILITATION OF A 10 KM LONG ASBESTOS-CEMENT DRINKING WATER TRUNKMAIN IN SPAIN WITH FLEXIBLE RELINING TECHNOLOGY Author: Jorge Lamazares |
Intl No-Dig-2019 Florence | Sinzatec Canalizaciones S.l. | 2019 | Close-Fit Linings |
Utility providers all over the world are confronted with deterioratingdrinking water pipeline infrastructure. Only in Spain there is around 40.000 km of asbestos cement pipe that is still in contact with drinking water and, as in the rest of the world, this pipes are approaching the end of their useful life. How to attempt their replacement is a great concern and the study of the best methods to replace them has to be done with a focus on safety, cost and environmental protection.Although trenchless technologies are well-established in the sewer industry, little progress has been made in the drinking water arena up to now. The paper introduces the alternatives to the replacement or rehabilitation of asbestos cement pipes and the reasons that can move the decisions to the use of Trenchless Technologies.This paper presents an innovative flexible relining technology that has been conceived for the trenchless rehabilitation of pressure pipes. The paper shows the composition of the Primus Line hose and addresses the specifically developed termination fittings which complete thesystem. Furthermore, the paper demonstrates that this technology permits long insertion lengths and the negotiation of bends. Finally, a case study from Reocín, Spain will address the deployment of the Primus Line technology for the rehabilitation of a 10km long drinking water main. In particular, the complete installation process will be lined out. The case study shows that the flexible relining technology is characterized by short construction periods with significant cost and time savings compared to traditional open trench methods, ease of installation and minimum equipment needs on-site. The paper concludes with an outline of the benefits and limitation of the Primus Line technology. (click to report an error) more... share... |
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| 2261 | Rehabilitation of a 3000 mm water supply line under operating conditions in Buenos Aires Author: Jens Hölterhoff |
Intl No-Dig-2019 Florence | University Of Applied Sciences Hochschule Wismar / German Society For Trenchless Technology /prof. H | 2019 | Cured in Place Pipeliners |
The portable water in Buenos Aires, Argentinia is transported from the drinking water plants to the pumping pumping stations in the city via an approximately 80 km long supply network, 30 - 35 meters deep, with diameters of 4.5 to 3.0 meters, the so-called Rio Subterráneo. The pipes were formed by mining as in-situ concrete pipes without steel reinforcement. Some of these pipes show cracks due to changed conditions. The situation in the area of the Villa Adelina pumping station was particularly critical, so that there was a danger of collapsing. The Buenos Aires Water Supply Company Aqua y Saneamientos Argentinos S.A. (AySA) decided, due to the complexity of the project, to ask companies worldwide with experience in the rehabilitation of such pipelines under very difficult conditions to submit a rehabilitation concept. The German company Ludwig Pfeiffer from Kassel was awarded the contract to rehabilitate the pipeline. The following execution describes the implementation of the project with the particular difficulties of having to carry out all work under water and under operating pressure. (click to report an error) more... share... |
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| 2262 | Renovation of sewerage networks under pressure with cured-in-place pipes; RSV leaflet 1.2 Author: Susanne Leddig-Bahls |
Intl No-Dig-2019 Florence | Iqs Engineering Ag | 2019 | Cured in Place Pipeliners |
Lining with cured-in-place pipes has been successfully established in the pipeline rehabilitation market over the past 45 years. In the field of renovation of underground non-pressure drainage and seweragenetworks the technology is now considered to be comprehensive and has many applications.When it comes to the rehabilitation of pressure pipelines, network operators, engineering offices, manufacturersand installation companies, however, are confronted with issues that are currently not adequately answered and regulated. The RSV working group 1.2 "Renovation of sewage pressure pipelines with cured-in-place pipes", which was initiated at the end of 2017, deals with this gap. A leaflet has been prepared which sets out the normative basis, defines requirements for materials, techniques andprocedures and describes the basics of planning, announcement, execution and testing. The pressure pipe liner system, consisting of the cured-in-place pipe, its service connections and connections to the pipeline network, is defined here for the first time and the requirements for quality assurance are established on the basis of typical operating conditions in a pressure pipe system. The considerations range from corrosion, pitting, cracks and leaky pipe connections to loads from pressure surge (pressure hammer) and the occurrence of negative pressure. The RSV leaflet 1.2 goes beyond existing regulations and, in particular, provides practical information for all parties involved in the project and all project phases - from suitability testing of the pressure pipe liner to project planning, comprehensive tender and quality assurance on the construction site. (click to report an error) more... share... |
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| 2275 | REPLACING A PENSTOCK PIPE USING DIRECTIONAL DRILLING : CHRONICLE OF A NON-STANDARD JOBSITE Author: Dominique FELDMANN and Paul CAVILLON |
Intl No-Dig-2019 Florence | Forexi | 2019 | Horizontal Directional Drilling |
Nested in a geological environment shaped by the tumultuous tectonic history of the Alps, the hydroelectric power plant of Saint Martin de la Chambre, located near Grenoble (France) and supplied by a penstock pipe, was eventually shut down because of a landslide. To bring the powerplant back into service, a new project was set up around the central idea of using directional drilling to rebuild the penstock pipe while taking into consideration both the geology of the area and the geomorphological context. Overall, the project represents a 1000m (3280ft) drilling along a 450m (1476ft) drop (?z), between the hydroelectric power plant of Chamorand and the chapel Notre-Dame de Beaurevers, right in the middle of the dauphinoise zone and in a geological environment that mixes marls, limestones, zones of compressions and faults. Furthermore, the landslide that caused the failure of the initial pipe created a lens of weakened soil, preventing any rehabilitation of the existing building. Lastly, the presence of a nearby stream named the Merderel had to be considered. This project put a strong emphasis on the importance of intensive analysis of the geological context through direct field investigation by the geologist and precisely calibrated geotechnical and geophysical studies. This has fueled a joint reflection to find and set up the necessary techniques that ensured the smooth and risk-free realization of this outstanding project, in such a complex mountainous landscape. (click to report an error) more... share... |
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| 2276 | SAFETY MEASURES FOR REDUCING ASSET STRIKES Author: Scott D. Landes |
Intl No-Dig-2019 Florence | Infrastructure Resources And Rhino Marking & Protection Systems | 2019 | Horizontal Directional Drilling |
Taking the appropriate safety measures to minimize the risk of hitting a pipeline or cable during the HDD process is far less expensive than paying for repairs, property damage, or even risking loss of life. A pipeline accident and explosion on November 10, 2004 in Walnut Creek, CA, USA led to five fatalities and over $90 million USD in damages being awarded by the court. While this incident is not a result of HDD, there are an increasing number of major damage cases where HDD is involved. The buried asset owners, locators, and HDD operators all have a contributing role in making this happen. This paper and presentation will provide examples of how the risk of asset strikes can be reduced using proper safety measures. (click to report an error) more... share... |
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| 2238 | SELECTION OF CRITERIA AND METHODS FOR A COMPARATIVE EVALUATION OF ENVIRONMENTAL SUSTAINABILITY OF OPEN-CUT AND NO-DIG TECHNOLOGIES FOR NEW INSTALLATIONS AND IN SITU REHABILITATION OF WATER PIPES Author: Martina Ferrini,Valentina Castellani, Nadia Mirabella,Serenella Sala, Stefano Tani and Valeria Mezzanotte |
Intl No-Dig-2019 Florence | Disat, Università Degli Studi Di Milano Bicocca; Sustainability Consultant; Ku Leuven, Department | 2019 | Asset Management and Work Planning |
MetropolitanaMilanese (MM Spa), the water authority of the city of Milan, has carried out, on both water and sewage networks, installation of new pipelines and rehabilitation of the already existing ones using no-dig technologies, i.e. techniques alternative to open cutexcavations. To spread such techniques, having evident advantages with respect to the traditional ones, a procedure to assess its sustainability in different cases was developed based on SATanalysis (Technology Sustainable Assessment), a procedure adopted to support the decision-making process, including a set of indicators that take into account the technological, environmental, economic and social aspects.To take into account the most relevant aspects in the specific case the SAT procedure was modified: the environmental impacts were calculated by LCA, the economic costs as direct costs and the social ones as indirect costs (including logistic aspects) and risks for the exposed population (workers and general population). To setup the methodology, two significant case studies of the city of Milan in order to disclose and assess the environmental, social and economic impacts which should be used for decision making. (click to report an error) more... share... |
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| 2240 | Sensors Monitoring and Trenchless Technologies: Two Essential Keystones Toward a Deep Innovation of Smart Pipes Backbones Author: Costantino Giaconia, Leonardo Mistretta, Giuseppe Greco, Raimondo Rizzo, Antonino Valenza and Francesco Di Puma |
Intl No-Dig-2019 Florence | Diing -department Of Engineering, Università Degli Studi Di Palermo; Ekso S.r.l. | 2019 | Asset Management and Work Planning |
Trenchless methods are nowadays most widely used in rehabilitation of existing pipelines. It offers huge advantages compared to the traditional open cut methods eliminating costly and time-consuming excavations, reducing the discomfort of the service interruption and in most cases being the unique applicable technology, as in the common scenarios of our very dense cities. Both industrial pipes networks and backbones for drinkable water are very important assets of our society, being water one of the most important natural resource too. There is an effort, technological and social, to reduce waste and enhance conservation of resources. The major problem in wasting is the efficiency of the water distribution networks, average losses are around 30% of the input volume with peaks near the 60% in certain areas. Hence, the rehabilitation and control of the existing pipeline networks is a crucial point to avoid waste and reduce running costs. During the last decade the tremendous exploitation of the IoT (Internet of Things) technologies is happening in full force and including monitoring systems during the rehabilitation processes of a pipe network can lead to fully monitored systems in a few years. Having a monitored network can be useful for the manager of the distribution network in terms of fast leak detection, network control and, most important, on planning new and expensive refurbishing actions. This work will explore the state of the art investigations present at research and industrial level, trying to depict some figures regarding possible innovations that may help to increase the overall "smartness" of these crucial backbones.Some experimental work,carried out by the authors,exploiting the MEMS technology capabilitieswill also be described as an example of the IoT potential in this field. (click to report an error) more... share... |
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| 2303 | SHARING PERSPECTIVE: HOW BID ITEMS EFFECT THE COST AND CONSTRUCTION OF A PIPE BURSTING PROJECT Author: Edward Alan Ambler ; Mark Hutchinson Mark ; Lawrence Pultz ; Michael Woodcock |
Intl No-Dig-2019 Florence | Leed Ap Am Trenchless; W. Hutchinson Consulting L.l.c; Cph Engineers; Portland Utilities Constru | 2019 | Pipe Bursting and Splitting |
Trenchless technology projects vary significantly in many ways from traditional open cut construction projects, the least of which is the mechanism as to which to solicit competitive bids for the work to be constructed. Pipe bursting projects use an existing conduit to put back a new facility while minimizing above ground restoration. There have been a wide variety of approaches by owners and design engineers to provide bid items for contractors to competitively bid in a balanced fashion. There have been an even wider variety of ways that contractors and construction inspectors have interpreted these bid items when actually constructing the project. This paper will provide evidence of bid items and their effects on the cost and construction projects utilizing pipe bursting methodology for pipeline rehabilitation projects from the perspective of actual owner's representatives, design engineers, contractors and construction inspectors. Varying methods on quantifying and costing pit excavation, pipeline installation, lateral connections, sag repairs, restoration, utility conflicts and field failures will be examined among many other items. Multiple executed contracts in North America will be used as example case studies from the people involved in designing, executing, inspecting and paying for the projects. (click to report an error) more... share... |
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| 2291 | Short-Segment Jacking of Water Mainfor Realignment under Limited Spacein Urban Area Author: Huanying Fan and Shihchi Wu |
Intl No-Dig-2019 Florence | Taipei Water Department | 2019 | Microtunneling and Pipe Jacking |
The underground pipelines of various utilities crossing each otheris inevitable dueto limited beneath spacein urban area such as Taipeicity. Among thiscircumstance, the existing large-diameter water main penetrating through drainage become a major concerning issue. The water mainspassing through drainagesnot only causing breach that affect the drainage structural stability, but also occupy the interior space that might obstruct the draining water flow. Therefore, such situation can lead to catastrophic consequence to general public and utilities in terms of public safety as well as property damage. Thus Taipei Water Departmentplans to remove all the penetrating water main pipesinside the drainagesin time.Considering the complexity of various underground circumstance, traditional open-cut method is not capable to complete the water main realignment of crossing drainage. Therefore micro-tunneling pipe jacking method has been implemented in such kinds of water main realignment project. In addition, indispensable adjustment and innovation of the trenchless method coordinated to the site conditionshad been carried out repeatedly, including minimize the size of jacking shaft as well as the lengthof pipe unitin order to fit the congested circumstance.Eventullythe improved methodregarded as short-segment jacking of water mainhad become a reliable approachin the waterline realignment project.Until now severalcases had been successfully realigned by this technique, therefore become a trenchless resolution for thedrainage trouble.The technique might be applicableforother urban areaswith complex underground in the future. This paper will elaborate the application of short-segment jacking method and the adjustment as well as innovationadopted during the process.Furthermore,?700mm water main realignment case studywill be discussedconsiderablyin this paper. (click to report an error) more... share... |
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| 2316 | Small or Big -we don't mind! Piccolo o Grande -non c'importa! Watermain Inspection Technologies Author: Piero Salvo |
Intl No-Dig-2019 Florence | Game Trenchless Consultants | 2019 | Site Survey / Pipe Inspection |
When we speak about CCTV inspection, the first thing that comes to mind isa sewer inspection. However, watermain inspection is more limited because of the implications regarding isolation of the watermains and dewatering of the pipes to have access. In the past 8 to 10 years, technology has been introduced that allows for watermain inspection and leak detection of both small diameter and large diameter pipes without always having to put the pipe out of service or without having to dewater the pipe. For smaller diameter pipes (100mm to 300mm), access to the pressurized watermain is done through existing fire hydrants or existing ball valves on the main. This takessome coordination with water utilities to prepare the hydrants or access points before the inspections. The presence of tuberculation (iron oxide) on the inside of the pipe and bends in the pipe will have animpact on the length of inspection.For larger diameter pipes (> 300mm), access to the pressurized watermains is usually done through air release valve or other accessories that are typically on the crown of the pipe. In other cases, a depressurized watermain can be accessed through a lid in a valve chamber.This paper will present the different technologies that will allow municipalities to inspect their watermains without having to depressurize the pipe and in other instances, can be depressurized but not necessarily dewatered to get an inspection. Following the description of the different inspection technologies, case studies and project results will be presented (click to report an error) more... share... |
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| 2277 | SMART TECHNOLOGIES FOR THE ENHANCEMENT OF PRODUCTIVITY AND DIGITAL INTEGRATION AND SAFETY IN HDD PROJECTS Author: Jasper van 't Westende |
Intl No-Dig-2019 Florence | Vermeer Emea | 2019 | Horizontal Directional Drilling |
Some horizontal directional drills register a full set of operational parameters; some of these are processed and made available on a real-time online platform.The online platform is conveniently accessible, regardless of the device and OS locally available. It means that the user can interrogate the platform either with a laptop, a tablet or a smartphone -wherever the location of the user. Such a productivity tool makes it convenient for operations managers to collect, organize and share important job documentation through the cloud and provides detailed customized reports.Bore line and utilities mapping, rod-by-rod bore planning and as-drilled log data collection are part of the capabilities of this productivity tool. The integration with third-party high accuracy GPS antennasmakes this tool capable to perform pre-existingutilities avoidance to help enhance safety during HDD operations and return detailed as-builts of the installed product pipes. (click to report an error) more... share... |
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| 2325 | Spray Applied Lining Systems Address UniqueInfrastructure Problems Author: Josh Marazzini |
Intl No-Dig-2019 Florence | Vortex Companies | 2019 | Spray-on Linings and Coatings |
As trenchless technology continues to become more universally accepted, and new materials are being developed and proven successful, we are beginning to see more "outside of the box" applications, if you will. For a full structural restoration, it wasn't that long ago when the use of a trenchless technology typically meant one of three applications: CIPP, slip lining or pipe bursting. Over the last decade, with the advancement of new products and application methods, it is now possible to obtain a fully structural replacement using spray applied technologies. One such material capable of this is geopolymer mortar. In the case of Lakewood, Ohio, it was the perfect solution for repairing an aging and badly deteriorated drop manhole and outfall culvert. (click to report an error) more... share... |
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| 2292 | STABILITY OF SURROUNDING SOIL BY USING UNDERPINNING PIPE JACKING METHOD Author: Hideki Shimada, Takashi Sasaoka, Sugeng Wahyudi, Akihiro Hamanaka, Fumihiko Matsumoto, Tomo Morita |
Intl No-Dig-2019 Florence | Department Of Earth Resources Engineering, Kyushu University; Alpha Civil Engineering Co | 2019 | Microtunneling and Pipe Jacking |
In this paper, ground movement around shallow underground structures when a new structure is constructed crossing beneath an existing structure was studied using a finite different method (FDM) by means of FLAC3D. The induced stress generated by the excavation work is controlled by underpinning pipe jacking method to protect the existing structure failure. Six underpinning pipe jackings are jacked around the projection area of new structure; 3 at right side and 3 at left side. This study also considers the pipe shape, distance between pipe to new structure, and distance between pipe to the existing structure. The cross-section of the pipe was considered in circular and square. While distance between pipe and new structure and the existing structure was considered 1 to 3 m. The results showed that the underpinning pipe jacking method was a powerful tool for controlling the induced stress when the projection area is excavated; accordingly, the settlement can be minimized. Pipe shape influenced the stress pattern surrounding the existing structure and new structure, in which rectangular-shaped pipe shows a better ability to restrain ground movement. The ability to restrain ground movement increases with decreasing distance between pipe and the existing structure and decreases with increasing distance between pipe and new structure. The achievements can be practically used in excavating a new structure for stability of shallow underground structure. (click to report an error) more... share... |
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| 2278 | Steering the HDD Author: Hans Blok |
Intl No-Dig-2019 Florence | Brownline | 2019 | Horizontal Directional Drilling |
Trenchless Technologyis continuouslyimproving and expanding beyond it'slimitations.HDD drillings are getting longer and longer and we execute intersect drillings in very complex soil conditions.We drill more and more in very congested area's with several other services within in the vicinity of the planned route.Drilling routes are quite complex with all sort of requirements, like drilling in the best soil layers, allow for enough cover to avoid mud blowouts, allow for sufficient tolerance with existing infrastructure, etc. etc..Several curves will be applied in the route to steer the optimum drill line.All this design data will be used to calculate the theoretical pulling forces withour usual calculation programs and then we add asafety factor of 40% for unforeseen circumstances.These calculations are still the same as we used several years ago with the large safety factorfor several risks. And because the uncertainty of the soil parameters, we certainly need a substantial safety factor.But some of this safety factor is quite often used for tolerances in the drilling, when a deviation must be compensated, or interference is disturbing the measuring.We can reduce this part of the safety factor, when we follow the drill line more accurateand use a system where interference is not influencing the measuring.Accurate measuring can reduce the pulling forces of the drillingsand will give more certainty of the final position of the drilled profile (click to report an error) more... share... |
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| 2287 | Successful Installation of CFRP and GFRP on Pipe Bridges in Scotland, UK Author: Amber Wagner; Shauna Herron; Raymond Hope |
Intl No-Dig-2019 Florence | Aegion Corporation; Environmental Techniques; Black And Veatch | 2019 | Cleaning, Localized Repairs and Grouting |
In 2017, Amey Black and Veatch (aBV), and Environmental Techniques approached client Scottish Water about utilizing carbon fibre (CFRP) and glass fibre (GFRP) to provide a 60-year rehabilitation technique to an existing pipe bridge, an approach that has never been used before in the UK Water Industry. Traditionally, pipe bridges are replaced, but this one was located on an environmentally sensitive area on a golf course. One of the benefits considered was a much reduced impact compared to standard construction process with minimal over-pumping required. The CFRP/GFRP system provides a robust, sustainable solution that creates a new pipe. After receiving the initial estimates, which included a 10% savings in cost and a 25% reduced on-site construction time, the client elected to move forward with the CFRP/GFRP design option. Nevertheless, this began an 18-month approval process for the CFRP and GFRP systems through rigorous assessment.by Scottish Water's Technical Support & Assurance team along with aBV Design Engineers. This paper will focus on two majoraspects of this project: (1) the engineered solution, and (2) the quality and expediency of the installation to meet the client's timeline. (click to report an error) more... share... |
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| 2293 | Technology transfer - how dredging and shipbuilding innovations are improving (micro)tunnelling operations Author: Tobias Vraetz, Hans Greve, Kris Zych and Karsten Jansen |
Intl No-Dig-2019 Florence | Royal Ihc, Ihc Mining & Tunnelling | 2019 | Microtunneling and Pipe Jacking |
At first glance it may not be obvious but shipbuilding, dredging and tunnelling have many related disciplines. Royal IHC, the global market leader in dredging vessels, has resumed the development of tunnel boring machines about two years ago. Part of the focus of Royal IHC lies with the development of innovative solutions concerning more efficient production methodologies and monitoring serving the aforementioned markets. This publication describes challenges and developments of innovative solutions from shipbuilding and dredging, being applied in the domain of tunnelling. This includes the adoption of an electric drive concept for MTBMs, as well as the use of the non-radioactive density meter, the so-called RF meter, for bentonite slurries. The prototype for a MTBM with a completely new electric cutterhead drive is currently under construction. The RF meter has already been released for dredgers and is currently evaluated on a pilot project on a TBM. (click to report an error) more... share... |
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| 2317 | The adoption of a Dial Before You Dig System by New Zealand in order to protect the underground infrastructure Author: J.W. Nijman |
Intl No-Dig-2019 Florence | Pelicancorp Pty | 2019 | Site Survey / Pipe Inspection |
Underground infrastructure such as cables and pipes in mature economies are every day at risk of damages caused by excavation works. Apart from interruption of the service (electricity, gas, water, telecom, etc)leading to missed income and reduction of customer satisfaction, in some cases the damage can cause injuries or fatal accidents, whether this is direct or indirect (consequential damage). This paper describes the erection of a so called Onecall service in New Zealand by 2008 and the learning of that service throughthe years and what this can mean for other countries and asset owners (read utilities and other companies owning underground cables and pipes).The papertouches as well on the business model, or better who pays for the servicebased on the model in New Zealand but also looking in other jurisdictions andthe reasons for a certain method.We are in the digital era, which meanspeople expect that information gathering are all accessiblebyapp on a mobile deviceor if not at least via a websupporting any kind of browser, however the reality of the informationexchange of plans of the whereabouts of cables and pipes is in many European countries still a verycumbersome and manual process. Not only time consuming, it alsomay take weeks of the delivery of those plans.At the flip side we have New Zealand and its neighboring country Australia wherewith a single request all plans of affected utilities are provided, a process that has a guaranteedelivery within 2 daysand in most cases all major plans are available in minute after the requestis made. (click to report an error) more... share... |
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| 2318 | THE CADASTRE OF UNDERGROUND INFRASTRUCTURE NETWORKS: THE MODELOF REGIONE LOMBARDIA Author: Chiara Dell'Orto, Erminia Falcomatà and Francesca Fava |
Intl No-Dig-2019 Florence | Bip -business Integration Partners; General Direction For Infrastructures, Transport And Sustainab | 2019 | Site Survey / Pipe Inspection |
The purpose of this paper is to explain and describe the benefits achieved after seven years of underground register management. In a very heterogeneous situation as the Italian one, regarding underground management,Regione Lombardiastands out with the regional law n. 7 dated 18 April 2012 "Procedures for economic development and occupation" that, for the first time in Italy, established the legal framework for the creation of a local underground infrastructure register.The Underground Cadastre, as defined by the Law, is configured not only as a tool to catalogue the underground infrastructures (pipeline of water supply, sewage disposal plant, public illumination, gas, broadband, ecc) but above all as the set of tables, mapsand related documents suitable to represent:-the stratigraphy of the soil and subsoil-location and size of infrastructures for the distribution of public services-attributes related to the property, the management and the service deliveryThe benefits that a knowledge instrument of this type offers are both for policy makers and for the stakeholders: a better use of the resources, a shared planning of interventions, a reduction of excavations and accidents. While creating the Cadastre, Regione Lombardiahas provided: the enactment of mapping specifications for data acquisition (GPR and no-dig technologies), the interoperability standards for the exchange of dataset information, a modern dedicated webgis, the IT security criteria. (click to report an error) more... share... |
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| 2294 | THE CHOICE OF THE BEST TECHNOLOGY FOR LAYING AN UNDERGROUND PIPE. A SUCCESSFUL CASE: CROSSING THE ADDA RIVER BYTHE DIRECT PIPE METHOD Author: Marco Dusso, Antonio Guerini and Enzo Rizzi |
Intl No-Dig-2019 Florence | I.c.o.p Spa | 2019 | Microtunneling and Pipe Jacking |
The continuous development of trenchless technologies offers today the possibilityto identify and use different alternativeno-digsystems for the same project. International and national standardsclearly describe and classify all available trenchless technologies and their typical application range. Nevertheless, a specific investigation and risk assessment are necessary to choose the proper design according to the Client'sneeds. Recently, I.CO.P.S.p.A.completed the Addariver crossing in a very complex geological situation where HDD had beenpreviously appliedwithout success. After execution of additional geological investigation, and after a proper risk assessment,Microtunnelling and Direct Pipe were identified as possible solutions. The final choice was to install abig casing pipe (56")bytheDirect Pipe system. Based on the experience gainedin the last years in Direct Pipeworks,it was decided to design a dedicated cutting head and deploy tailored operating procedures which allowed to successfullycomplete the work. In the present paper we describe how it was possible to execute the Addariver crossing using Direct Pipe.It has been demonstrated that an important step forward has been done to enlarge more and more the applicability of the Direct Pipe system. (click to report an error) more... share... |
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| 2279 | THE CORNEGLIANO LAUDENSE NATURAL GAS STORAGE PROJECT: HDD AS SOLUTION FOR PIPELINE INSTALLATION IN URBAN AREAS Author: Nisii V., D'Alberto D., Bruciatelli L. , Napolitano A. and Tallone F. |
Intl No-Dig-2019 Florence | Onshore E&c Division Saipem | 2019 | Horizontal Directional Drilling |
The Cornegliano Laudense Natural Gas Storage Project consists in the conversion of a depleted gas field into two underground gas clusters interconnected by a DN600 (24") clad gas pipeline at 170 barg. A major design challenge of the interconnection pipeline route was the crossing of a densely urbanized area. In order to minimize the impact of the project on the residential and commercial districts, and also to soften disagreement of the local community with respect to an open cut option, a 680 m long HDD (Horizontal Directional Drilling) crossing technology was proposed. In order to comply with Italian National Regulations related to urban area crossings, a DN850 (34") casing pipe was installed with the HDD method and the DN600 (24") process pipe was inserted by steel slits. Additionally, long term gas pipeline operation safety is guaranteed by an advanced loss prevention design (i.e. casing pipe design to withstand full pressure, remote controlled gas detectors and alarm systems). The work was successfully completed, taking care to minimize the impact on the local community by monitoring noises and vibrations produced during construction. The paper illustrates an overview of the major challenges, showing strategies and technical solutions adopted to overcome major concerns related to adoption of trenchless methodologies for urban area crossings. (click to report an error) more... share... |
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| 2329 | The Design and Application of PE100 Pipe in Trenchless Technologies for New Installation and Rehabilitation -Aspects of new Materials and Support via Online Guide and Tool Author: Patrik Schneider and Andrew Wedgner; Tom Sangster |
Intl No-Dig-2019 Florence | Pe+ Association ; Downley Consultants Ltd | 2019 | Associated Technologies, Techniques and Equipment |
PE100 pipe is the most widely used material for the installation, rehabilitation and replacement of pressure pipes for water and gas supply and for pressure sewers. PE100 is used in a broad range of trenchless technologies and this very versatility means that selecting the appropriate method for its use is not always a simple process.Special grades such as PE100-RC have been developed specifically for use in trenchless technology, but the lack of recognized international standards has so far limited the use of these highly innovative materials. The PE100+ Association, representing 12 international producers of high quality PE100 pipe resins, undertook a project with key players in the pipe industry to address this issue. Extensive work was undertaken on the development and validation of methods for the characterization of the materials, specifically of their exceptional resistance to slow crack growth, which makes them the material of choice for no-dig applications. Threshold values for the key parameters have been proposed and will be used in the upcoming update of the respective international standards for gas and water pipes. The outcome of the project will be discussed together with an online guide and method selection tool to aid designers, utilities and contractors in selecting materials and trenchless methods for PE100 pipe installation covering both new installation and rehabilitation works. (click to report an error) more... share... |
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| 2280 | The Development of Real-time Detection and Wireless Transmission System of Drilling Parameters in HDD Reaming Hole Author: Zhu Xuming and Wu Xiaoming |
Intl No-Dig-2019 Florence | Faculty Of Engineering, China University Of Geosciences | 2019 | Horizontal Directional Drilling |
n HDD construction, in order to solve the problem that the real working condition in the hole cannot be accurately grasped only by using surface sensors and instruments, it is necessary to directly detect drilling parameters such as bit torque, axial force and mud pressure. For this reason, an automatic detection system is developed, which has underground detectionpartto detect drilling parameters andfinish the signalcode modulation, and then transmit the signal to the surface receiving equipment in the form of wireless electromagnetic waves for demodulation. The new mechanical structure of the underground detection partprovides the best environment for strain gauge and pressure sensors to detect bit torque, axial force and mud pressure while ensuring sufficient strength. In order to ensure the effective penetration of the formation, the transmission frequency and power of the electromagnetic wave are optimized through theoretical analysis and experimental demonstration, and measures are taken to reduce interference, so as to ensure the real-time and accurate acquisition of the real working condition of the underground bit. (click to report an error) more... share... |
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| 2330 | The DLT-Method: Stress Test for Pressure Pipes Author: Andreas Haacker |
Intl No-Dig-2019 Florence | Siebert + Knipschild Gmbh (institute For Testing Of Plastic Materials) | 2019 | Testing & Assessments |
In view of the aging of pressure pipe networks, the pressure on network operators for maintenance is increasing. Although there are trenchless rehabilitation methods available, proof of the suitability has not yet been sufficiently available -due to a lack of test methods that reflect real conditions. With a new special test method, the Dynamic Load Test (DLT), rehabilitation systems for pressure pipelines under pressure shock loads -even in the vacuum range -can now prove their suitability for the first time. A system for dynamic component testing was developed and put into operation in Germany -with the participation of a working group of the German Society for Trenchless Technologies (GSTT) -at the Siebert + Knipschild testing institute. The first systems tested and approved on the basis of DLT are now in use in Germany and promise growing confidence in rehabilitation technologies and thus a revival of the market for pressure pipe rehabilitation systems. (click to report an error) more... share... |
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| 2281 | The Drilling Contractors Association (DCA-Europe): A European organization for Quality and Education in HDD Author: Jorn Stoelinga |
Intl No-Dig-2019 Florence | Dca-europe | 2019 | Horizontal Directional Drilling |
The DCA was established in 1994 by the leading HDD companies in Europe. From the start the goals have been to support, promote and develop the HDD technology. It aims at creating a level playing field, improving understanding for roles and responsibilities of parties involved and improving quality. In the Technical Guidelines basic technique and responsibilities are described. These guidelines are being revised regularly, the current (4th) edition is under revision again, in order to keep up with recent developments. Special issues that of interest to all involved in the HDD industry are discussed in special task groups, in which members take place. Recently a task group was finalised, studying the options of dealing with drilling fluids after completion of the HDD. Another task group is studying the coating materials suitable for HDD, advising on the use of proper coating for both pipe and field joint for various circumstances. Recently a new task group was started trying to get a uniform system of gathering and transmitting data collected by the drilling rigs. Achieving and maintaining high quality and safety standards is very important to the DCA. We actively support training of personnel, with lecturers and content support at the Drillers school in Celle (Germany) and Deltares (The Netherlands). Other events aimed at improving knowledge and quality organised by other parties are supported by presenting or providing lectures at those events. On our yearly congress contractors, principals and suppliers come together, with interesting lectures and workshops in the day and an entertaining programme in the evening it is a great opportunity for networking and exchanging ideas in an informal setting (click to report an error) more... share... |
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| 2319 | THE ITALIAN SOLUTION FOR THE CADASTRE OF TECHNOLOGICAL INFRASTRUCTURES Author: Fulvio Ananasso and Sergio Farruggia, Calogero Ravenna; Monica Sebillo |
Intl No-Dig-2019 Florence | Associazione 'stati Generali Dell'innovazione'; Asa -aziendaservizi Ambientali; Associazione 'amf | 2019 | Site Survey / Pipe Inspection |
This paper aims at showing the implementation of the Italian cadastre of technological infrastructures, its maintenance and updating. SINFI(National Infrastructure Federated Information System) is the identified platform devoted to the coordination andmanagement of nationalinfrastructures in the framework of the broadband and ultra-broadband Italian strategy. Among its functions, it facilitates sharing of infrastructures, thanks to coordinated management of the under-and over-ground technological networks and related interventions; it also offers a single dashboard that efficiently manages and monitors all interventions.Previously, the need for such a platform was put in relation to the rational use of the underground and the implications onto themanagement of public land: consequently, even on the mobility infrastructures and transportation systems, as well as risks for people and manufactured goods, but also to prevent potential economic damagesfrom accidental breakage of pipes and ducts.The increased awareness in terms of safety and civil protection has further expanded its importance, linking, for example,its availabilityto environmental issues(such as hydrogeological instability)tothe context of critical infrastructure management (see Directive 2008/114 / EC)Last but not least, the availability of such aregister is necessary to publicly check choices on sustainable development, according with the UN 2030 Agenda for Sustainable Development, signed in September 2015 by the Governments of193 UN Member Countries, specifically with respect to the themes of Strategic Development Goals 9 ("Build Resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation")and 11 ("Make cities and human settlements inclusive,safe,resilient and sustainable").The paper aims at providing solid answers to a multiplicity of operators / stakeholders in this respect / application framework, thanks to the availability of a national information system specifically dedicated tothe over-and under-ground network infrastructures--the SINFI. (click to report an error) more... share... |
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| 2304 | THE PATH FORWARD FOR PIPE BURSTING ASBESTOS CEMENT PIPE WHILE MEETING EXISTING US REGULATIONS Author: Edward Alan Ambler; John Matthews ; Lawrence Pultz; Ryan Stowe |
Intl No-Dig-2019 Florence | Leed Ap; Battelle Memorial Institute; Cph Inc; Battelle Memorial Institute | 2019 | Pipe Bursting and Splitting |
The city of Casselberry completed its $10.3 million asbestos cement (AC) pre-chlorinated potable water main pipe bursting project in April of 2014, which replaced approximately 35 miles of AC pipe. City staff has worked closely with the contractor, engineers, and regulators from the local to federal government to fully understand the applicability of the National Emissions Standards for Hazardous Air Pollutants (NESHAP) to pipe bursting of asbestos cement pipe. The Environmental Protection Agency (EPA) and industry representatives have recognized the need to understand the potential environmental impacts of AC pipe rehabilitation and commissioned a study to determine those impacts. The environmental impacts of pipe bursting AC pipe have been analyzed with the Casselberry Water Quality Improvement Project as its pilot project. Results of the study indicate that bursting AC pipe is environmentally friendly while providing the option to rehabilitate the existing pipeline in place. This paper will present the results of impact study of pipe bursting AC pipe while clearly describing how to burst AC pipelines and meet all existing regulations. This paper will also describe the challenges and successes of implementing a pipe bursting project, from field application of pipe bursting technology to working directly with regulators and right-of-way controllers who may be skeptical about pipe bursting AC pipe. A potential path forward through submission of a potential Administrator Approved Alternate to EPA that accepts a streamlined AC pipe bursting process will also be presented. (click to report an error) more... share... |
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| 2282 | THE ROLE OF TORQUE IN THE REAMING PROCESS IN HDD APPLICATIONS Author: Renzo Chirulli and René Albert |
Intl No-Dig-2019 Florence | Vermeer Emea | 2019 | Horizontal Directional Drilling |
Horizontal directional drills are traditionally classified on the basis of the maximum pullback force they can deliver. Nevertheless, during the reaming process the pullback force is just one of the operational parameters that plays a role in the borehole making. A simplified mathematical approach shows the role and the importance of torque in the borehole-making process. (click to report an error) more... share... |
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| 2295 | TIGHT CURVED MICROTUNNEL IN AUCKLAND; NEW ZEALAND Author: Yann Rouillard |
Intl No-Dig-2019 Florence | Bessac | 2019 | Microtunneling and Pipe Jacking |
The City Rail Link project in Auckland is the biggest underground infrastructure project ever made in New Zealand. The project consists of the construction of an underground rail tunnel between two existing rail stations. As part of this project, Bessac, associated with the local company March Construction, has successfully carried out the CRL C6 contract. This package consisted in the diversion of an existing stormwater tunnel located in the axis of the future rail tunnel. The scope of works included the construction of a 425 m long microtunnel, 2.0 m ID with a 100 years' design life and the construction of shafts and associated civil works, in a sensitive urban area. The geological conditions were very heterogeneous: the first part of the microtunnel is in soft clogging rocks and soils and the last part is in a mixed face with very hard and abrasive basalt. The project was originally designed to be carried out in two straight drives. Thanks to its expertise and previous experiences, Bessac brought an innovative solution to build the microtunnel in only one curved drive and so save the construction of an intermediate shaft. This alternative route included a very tight "S curve", with a radius of only 150m. Almost 90% of the length was curved. This solution was possible thanks to an adapted MTBM for such curves, the implementation of specific hydraulic joints between each pipe with a real-time monitoring system and experienced operators to ensure an accurate guiding while respecting the high local safety standards. (click to report an error) more... share... |
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| 2269 | TRENCHLESS SOLUTIONS FOR THE INSTALLATION OF GAS DISTRIBUTION NETWORKS Author: Thorsten Schulte |
Intl No-Dig-2019 Florence | Tracto-technik Gmbh & Co | 2019 | Horizontal Directional Drilling |
Well developed natural gas distribution networks play an important role in the success of the energy transition. In order for the pipeline network to be able to transport and store sufficient quantities of fossil and increasingly renewable natural gas, high investments are required for the maintenance and expansion of the infrastructure. These expenses can be significantly reduced with trenchless technologies in an environmentally friendly way and expansion can be accelerated without compromising supply quality and security. (click to report an error) more... share... |
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| 2296 | TUnIS Navigation E-Power Pipe. Precise Guidance of Small Diameter Tunneling Machines Author: Torben Hähnle |
Intl No-Dig-2019 Florence | Vmt Gmbh | 2019 | Microtunneling and Pipe Jacking |
The trend towards longer and smaller-diameter projects in Microtunnelling represents an enormous challenge for the guidance system. Pioneering innovations make the use of smaller and smaller machines possible, which do not allow conventional determination of position due to the reduced space availability. The areas of use for these small-diameter TBMs are various, and the guidance system must likewise be flexible toadapt to the requirements. An application that needs to be particularly emphasised in this connection is the Herrenknecht E-Power Pipe® method. The circumstances and demands on exact guidance could not be any more challenging - the machine and the pipeline cannot be accessed by personnel, there is absolutely no visual connection to the TBM, a conventional control survey using known reference points in the shaft area is not possible at any point in time. Despite all this, it is possible for the TBM to tunnel 3D curved advances 1000 m and longer, with the position being determined and represented continuously with an accuracy of less than 10 cm. For this, VMT offers the tailored guidance system, TUnIS Navigation E-Power Pipe®. The system allows a permanent, precise calculation of the position and displays the current and expected 3Dmovement direction numerically and graphically. For this, a hybrid system consisting of a fibre-optic gyroscope and an electromagnetic probe are used, which do profitably improve each other in an innovative navigation process that never requires the machine to be idle. This bi-directional support ensures high accuracy at all times so that even the small-diameter machines can always be controlled securely and accurately. The paper presents the challenges of small-diameter Microtunnelling in terms of guidance and the solution developed for the E-Power Pipe® method. (click to report an error) more... share... |
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| 2239 | UNI Pdr-Guideline on Low Environmental Impact Underground Infrastructure Technology Author: Esposto Feliciano, Paola Finocchi, Alessandro Olcese , Elena Mocchio, Alessandro Delvecchio |
Intl No-Dig-2019 Florence | Iatt , Uni | 2019 | Asset Management and Work Planning |
Technical standardization is an important tool in order to develop the no-dig market.IATT, in collaboration with UNI, has prepared a series of Best PracticeReferencesfor some Trenchless Technologies and this job is continuing to cover all the TT thanks to a Permanent Technical Commission.The UNI/PdR contains technical specificationsregarding innovative mattersfor the application of no-dig technology to all network services (water, gas, sewerage, telecommunications, electricity); they provide planning and technical indications for designers, contractors and costumers. The paper will provide a synthesis of the contents of the already published UNI/Best/ Practice Rules for various no-dig activities.Moreover some anticipations for those almost ready for their publication will be given. (click to report an error) more... share... |
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| 2301 | Unique horizontal drain installation under a building using pilot tube guided auger bore methods. Author: Michelle L. Macauley; Steve Torgerson |
Intl No-Dig-2019 Florence | Macauley Trenchless; Trenchless Construction Service | 2019 | Auger Boring and Pilot Tube Microtunneling |
This paper describes design and construction considerations for the pilot tube guided auger bore installation of one 10-inch (25-cm)diameter drain line and four 6-inch (15-cm)diameter horizontal drains under a critical FAA Air Traffic Control Facility with no interior access for construction. Key considerations included high water table in granular soils, limited work area around the building, and coordination around (and under) a critical infrastructure facility that operates continuously and cannot shut down. The facility was built on wetlands in the 1960s and expanded in the 70's and 80's with deeper subbasements and a larger 120-meterby 120-meterfootprint. This facility has reoccurring problems with flooding in the basement areas, which houses critical equipment/electrical components. The original construction included waterproof membranes, sub-slab drain tile, and perimeter drains to allow dewatering under the basement structure. In the 1990s water ingress was observed in the basement and a groundwater management system of 7 vertical dewatering wells was installed around the perimeter of the facility. These wells worked effectively until 2010 when groundwater was again observed in areas of the basement. The existing vertical wells were subsequently upgraded with larger pumps/stainless steel screens andan additional vertical well was installed to mitigate water infiltration into the facility. These measures worked until 2014 when the wells were found to be heavily fouled with iron-fixing bacteria which resulted in lost efficiency. After significant study, a plan was developed that will provide redundancy of the system and groundwater protection for the building. This plan included installation of four horizontal wells under the existing building to augment the 8 vertical dewatering wells and installationof a 10-inch (25-cm)diameter drain line under the building to tie to a new pump station. Design and construction challenges are discussed in this paper. (click to report an error) more... share... |
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| 2243 | Use of New Condition Assessment Technologies for Selecting Trenchless Rehabilitation of Wastewater Networks in Ras Al Khaimah, UAE Author: Abdul Qadir Malik |
Intl No-Dig-2019 Florence | Ras Al Khaimah Wastewater Agency | 2019 | Asset Management and Work Planning |
The Ras Al Khaimah Wastewater Authority (RAKWA) manages wastewater collection and treatment of sewerage in the emirate of Ras Al Khaimah (RAK) - the fourth largest of seven emirates of the United Arab Emirates (UAE). Having the most fertile soil in the country, due to a larger share of rainfall and underground water streams from the Hajar mountains, combined with a growing number of resorts taking advantage of Gulf beaches, RAKWA is undertaking a series of major wastewater rehabilitation and expansion projects supporting a population of nearly 420,000 people. Representing over 14.5km of recently installed plastic and fiberglass reinforced pipe, RAKWA targeted its City West Trunk Main, Mairid Network and Force Main Network - Area 1 Project, a currently 'inactive' network, for addition to the city's growing underground wastewater network, requiring innovative condition assessment, prior to its addition to the collection system.RAKWA engineers had noticed numerous sections of the 'new' network were experiencing high levels of infiltration, initially approved by high resolution CCTV cameras. Located on the Arabian Sea, tidal infiltration is a constant threat resulting in infiltration and exfiltration. As a result, prior to connecting lateral services to the network, RAKWA decided to incorporate Focused Electrode Leak Location (FELL) to identify and quantify specific leak locations for Fiberglass UV-Cured Trenchless Rehabilitation. FELL had been recommended in a recent Masterclass by UK-based WRc and is supported by ASTM F2550, leading to RAKWA's decision to use both IBAK Panorama CCTV and FELL technologies. While Gulf authorities have commonly relied on CCTV of their pipes, defects at joints and manhole connections many times have gone unnoticed, adversely affecting network performance. This paper will share results from the first major benchmark of CCTV & FELL technologies in the Gulf and discuss selection parameters to conduct 3.5km of UV-cured CIPP and 310 patches or sectional liners. (click to report an error) more... share... |
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| 2302 | UTILISATION OF MICROTUNNELING TECHNOLOGY FOR CONSTRUCTION OF THE NEW GAS PIPELINE BETWEEN AZERBAIJAN AND EUROPE Author: Yann Rouillard |
Intl No-Dig-2019 Florence | Bessac | 2019 | Microtunneling and Pipe Jacking |
Due to the increase of the gas demand in the European market, a new 42'' pipeline is under construction to link the Shah Deniz gas field in Azerbaijan to western Europe. In this context, Bessac has been awarded seven sensitive portions of the project to be constructed trenchless by microtunneling. The two first portions are located in Azerbaijan & Georgia, on the SCPX project. Microtunneling is used to limit environmental impact to install the pipeline underneath the Kura river. Each portion consist in a 1.8m id microtunnel excavated from a 20 m deep shaft to pass under the river. In Azerbaijan, the drive is 1000 m long and in Georgia, it is 600 m long. The five other portions are located in Albania, on the TAP project. On the two first sections, microtunneling is used in narrow valley context to pass under mountains. Each drive consists in a 1.8m id microtunnel excavated from a 8 m deep shaft. The drives are 595m and 555m long. After the construction of the microtunnels, the most challenging part of this kind of project is the installation of the 42'' steel gas pipeline in the tunnels. The pipe installed on roller in surface and is then pulled in the tunnel with a linear winch up to microtunneling launching shaft. Once the pulling operations completed, the annular void between the pipeline and the microtunnel is grouted. On the two followings sections, a 1.6 m id microtunneling machine is used to cross a river. The drives are 435 and 420 m long. The last section, 400 m long and 1.6 m id as well, is located 2000 m.a.s.l. to avoid a landslide area. These projects are accomplished in an oil & gas context with very high QHSE standards. All these drives have been successfully completed in 3 countries and in various and challenging geotechnical conditions. (click to report an error) more... share... |
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| 2322 | Water main rehabilitation with inserted hoses - Considerations on design and installation Author: Andreas Gross |
Intl No-Dig-2019 Florence | Rädlinger Primus Line Gmbh | 2019 | Slip Linings (Loose Fit) |
DIN EN ISO 11295:2018-06 references the classification and information on design and applications of plastic piping systems used for the renovation and replacement. The updated version includes now the rehabilitation with so-called inserted hoses. The paper presents the characteristics of this newly included product family and focuses in particular on the flexible aramid reinforced lining solution Primus Line® which falls into this product family. The paper will discuss in particular the no-dig rehabilitation of potable water mains using the aramid reinforced lining system. The paper will show the composition of the lining material and the functionality of the termination fittings. Furthermore, the paper will present the design considerations for a design life of 50 years. The paper will show the feasibility to install through bends and the underlying design and installation considerations. In addition, the installation methodology is shown. The requirements on installation start pits and destination pits are discussed as well as installation through manholes. The CCTV inspection, pipe preparation and cleaning requirements are discussed before the liner installation can commence. The paper will present the areas of application and show case studies on completed projects. The paper concludes with the advantages and limitations of this system. (click to report an error) more... share... |
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| 2320 | WRc's Use of Focused Electrode Leak Location (FELL) to Assess Gravity Sewers in the United Kingdom, United States, and Germany, Before & After Trenchless Rehabilitation Author: Peter Henley; Chuck Hansen |
Intl No-Dig-2019 Florence | Wrc Plc; Electro Scan (uk) Ltd | 2019 | Site Survey / Pipe Inspection |
Since 2015, WRc plc has completed numerous projects utilizing Focused Electrode Leak Location (FELL) to as-sess gravity mains, before and after rehabilitation, to detect leaks missed by conventional surveys. This paper discusses several UK FELL-based projects and a recent project undertaken by WRc in partnership with Electro Scan Inc. for Gelsenkirchen, Germany-based IKT, describing how low voltage conductivity can:1. Identify and quantify estimated levels of infiltration in litres per second or gallons per minute.2. Find major defects while other methods may not, i.e. ensure that major defects are not accepted.3. Help prioritize repairs.4. Survey sewerage mains and private sewer laterals, without interrupting service or bypass pumping.5. Test trenchless rehabilitation for water tightness.Based on the joint project conducted by WRc and Electro Scan personnel on IKT's most recent Short-Liner research project, this paper also discusses updated revisions to core FELL-based testing algorithms to recognize higher stan-dards (i.e. lower tolerances) for defects in Cured-In-Place Pipes (CIPP) and sectional liners, including the identifica-tion and quantification of pinholes. (click to report an error) more... share... |
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