CartThe International Society for Trenchless Technology
Found 95 results with term `` , from `Intl No-Dig-2019 Florence`
| Displaying 61 to 80 of 95 total papers | Previous 20 1 2 3 4 5 Next 15 | ||||||
| ID | Title | Event | Company | Year ▼ | Category | Abstract | Add to Cart |
|---|---|---|---|---|---|---|---|
| 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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