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Papers from WTC and ITA conferences have been made available as PDF documents.
ProceedingsThere are 1984 documents.
List of endorsed conferences
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WTC
World Tunnelling Congress
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Rock Engineering Challenges in Finnoo Metro Station area, Espoo, Finland
Abstract: The Finnoo metro station is the first station in the east on 7 km long West metro extension to the western Espoo. There are two passenger shafts and two technical shafts, one of those in the middle of 23 m wide, 285 m long and 15 m high station hall. To the west ofthe station hall there is a 156 m long, 25 m wide and 15 m high track switching hall. At the other end of this hall rock roof is...
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Experiment Study on Ground Suitability for EPB Shield Tunneling in Silty Sand Stratum
Abstract: EPB shield tunneling in silty sand stratum is constantly faced with overburdened loads, resulting in severe problems like large difficulty of advancement. In this case, soil conditioning is an effective way to improve the ground suitability for EPBM. However, the amount of soil conditioners’ injection is often based on experience lacking of experimental data of laboratory or field. In this...
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Super-large Diameter Slurry Shield Tunneling in Rock-Soil Mixed Ground under 0.72MPa Pressure: A Case Study of...
Abstract: Nanjing Yangtze River (Weisan Road) tunnel is one of the most difficult shield tunnel project of the world, which has many special characteristics such as super-large diameter (14.93m), high water pressure (up to 0.72MPa), long distance tunneling (S-line:4140m, N-line:3557m), and complex geological conditions (including 400m rock-soil mixed ground with rock strength up to 115MPa). Key...
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Development of System for Detecting Spalling and Peeling in Subway Tunnel Lining
Abstract: Improvement of the ways for detecting spalling and peeling of the concrete tunnel lin-ing is the important challenge so that we prevent concrete lining from peeling and falling off in subway tunnels . Tokyo Metro Co., Ltd. developed a method for detecting spalling and peeling using infrared thermography and has tested in actual tunnel. Additionally, because we developed a method using visible...
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Design strategy of tunnel-12 passing through a regional Churachandpur-Mao-Fault in the Tupul Imphal B.G, line section...
Abstract: In this study, we have thoroughly investigated the design philosophy of the Tunnel No 12 which is of 11.55 Km length passing through the active Churachandpur-Mao-Fault across the Tunnel. There are also several faults namely Dalang fault , Langka Fault Kadi Fault and Kabaw Thrust etc. are located around the Tunnel No 12. The proposed Tunnel No 12 is located in seismic zone V which is marked as...
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Characterization and safe disposal of acid generating alum shales in the Follo Line project, Oslo, Norway
Abstract: The Norwegian National Rail Administration is building a new railroad tunnel between Oslo and Ski. It is expected to generate between 9 500 and 18 700 tons of alum shales, CambroOrdovician black mudrocks, characterized by their high potential for generating acid rock drainage (ARD). This project illustrates an integrated management approach, from the characterization of the rock to the safe...
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Correlation of the results of the standard beam and EFNARC panel test
Abstract: Fibre Reinforced Concrete (FRC) is widely accepted in the tunnelling industry for use such as shotcrete, cast-in-situ linings or Tunnel Boring Machine (TBM) concrete linings. To calculate an FRC structure the generally accepted method is to measure the parameters of the FRC using the standard 3 point beam test, measuring the load, deflection and/or crack mouth opening displacement (CMOD)....
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Local splitting and crushing behavior under TBM hydraulic jacks
Abstract: During the lining construction process, high concentrated thrust jack forces are introduced in the segments leading to both high compressive stresses under the thrust shoes that can provoke a concrete crushing and tensile transversal stresses; the latter can cause cracks and, eventually, a splitting failure. In order to investigate the main mechanisms involved during either splitting or...
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Sediment-sluicing tunnel constructed neighboring to an existing earth dam with innovative design, construction and...
Abstract: Zengwen Reservoir is the largest reservoir in capacity in Taiwan. Typhoon Morakot in 2009 brought extreme precipitation with sediments of 90 million cubic meters to the reservoir, had reduced its effective capacity less than 69%. Rehabilitation for the reservoir is necessary to mitigate problems caused by sediments. A sediment sluicing tunnel that is going to be built neighboring to the dam,...
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Replacement of PFA in bi-component annulus grout applications
Abstract: Incorporating PFA or GGBS as secondary components to cement in TBM annulus grouting applications has long been considered to be standard within the industry. The decline in the steel manufacturing and coal industries in the UK has led to a massive shortage in supply of these pozzolanic fillers. Laboratory scale tests have been conducted in order to determine whether limestone filler could be a...
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Surface Challenges and underground solutions. The Follo Line Project
Abstract: Acciona Ghella Joint Venture is commissioned by the Norwegian National Railway Administration (Bane NOR) to construct the main part of the Follo Line tunnel (EPC TBM). The tunnel will be the most significant part of the project, including two 20 km separate single-track twin tunnels. AGJV will construct 37 km of the tunnels by using four Tunnel Boring Machines (TBMs). What really makes this...
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M6 Metro Line Extension in Bucharest, Romania
Abstract: The population of Bucharest City Metropolitan Area is currently exceeding 2,1 million. The first step in the preparation of Bucharest Metro Transport Global Development was to identify the methods of increasing the share of Bucharest metro transport system and its performance under the specific circumstances generated by urban public transport. The M6 metro line will connect Bucharest City with...
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Experience from the Ulriken tunnel, the first large TBM railroad tunnel in Norway
Abstract: 6900 m of the 7690 m long Ulriken tunnel is being bored with a 9,3 m open gripper TBM, next to an existing tunnel excavated by drill and blast in the 1960s. The new tunnel will significantly increase the capacity on the heavily rail trafficked line between Bergen and Arna Skanska and Strabag was awarded to perform the contract in a joint venture, entering new land both from a technical and from...
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How time-dependency influences the Longitudinal Displacement Profile (LDP) during the construction of deep tunnels
Abstract: During the excavation of a tunnel the accumulated wall displacement and the loading of tunnel support is the result of both the tunnel advance and the time-dependent behaviour of the surrounding rockmass. The current approach to analyze the wall displacement increase is based on the convergence-confinement method performed with either analytical (closed form solutions) or the usage of the...
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Design and Construction Challenges of a Major CSO Tunnel and Pump Station System in Indianapolis
Abstract: This paper presents the design and construction of a deep rock conveyance and storage tunnel and pump station cavern that was built about 70 m below ground surface for the City of Indianapolis. The TBM tunnel ran nearly 16 km in limestone with a finished inside diameter of 5.5 m. It provided a minimum storage volume of 205 million liters of untreated excess wet weather overflow. A pump station...
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Tunnel challenges – the Datwyler Sealing Solutions - Surface challenges – Underground solutions
Abstract: Datwyler Sealing Solutions is a leading supplier of customized sealing gaskets for modern tunneling applications. In 1969 Datwyler introduced comb-shaped compression gasket profiles, followed in 1974 by hollow chamber gaskets, and then in 1996 created double row sealing gaskets. Today Datwyler continues to develop and define the future in the field of sealing gaskets for tunneling. One of the...
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