CartThe International Society for Trenchless Technology
Found 95 results with term `` , from `Intl No-Dig-2019 Florence`
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| ID | Title | Event | Company | Year ▼ | Category | Abstract | Add to Cart |
|---|---|---|---|---|---|---|---|
| 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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