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World Tunnelling Congress
WTCThere are 1984 documents.
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Challenges and Innovations in the Deepest Underground Space Development in Restricted Urban Areas of Kuala Lumpur
Abstract: The Damansara Town Centre (DTC) was constructed in 1983 to 1986. The 9 blocks of 8 to 10 storeys buildings were founded on bored piles and steel H-piles foundations. The site is located in Kuala Lumpur Kenny Hill Formation. The construction of 2 new MRT stations within its vicinity and the rapid development of the surrounding areas have created an urge to redevelop this plot of land of over...
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Kolkata EW Metro - Removal of abandoned H-Piles using NATM in Soft Ground to facilitate the TBM operations in Package...
Abstract: Alignment of new EW (East-West) Metro Package 02, bored tunnels to new Esplanade Station, is crossing the existing (30-35 years old) Old Esplanade underground station, built with traditional bottom-up construction used in India in the 1980s. Newly proposed EW Metro tunnel alignment is running diagonally across this 250m long station (see Figure 2. below). There is 7.6m of vertical separation...
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The West Link Project in Gothenburg, Korsvägen Section
Abstract: ITA-AITES World Tunnel Congress, WTC2020 and 46th General Assembly Kuala Lumpur, Malaysia 11-17 September 2020 The West Link Project in Gothenburg, Korsvägen Section Klaus Rieker Wayss & Freytag Ingenieurbau AG, Tunnelling Division, Frankfurt am Main, Germany E-mail: klaus.rieker@wf.bam.com Abstract: In Gothenburg, the second largest city in Sweden, a new 8 km long double track railway line...
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Ground Conditioning for the Excavation of a Rock Mass with High Hydrostatic Pressure Using an EPB: The Experience in...
Abstract: The Interurban Train Line Toluca – Mexico crosses the mountain range of Las Cruces, which is part of the vast TransMexican Volcanic Belt, from east to west, with twin 4.7 km long tunnels, at depths from 15 to 136 m and with a slope of 4% in most of the alignment. Two 8.56 m. diameter EPB shields were used to bore the twin tunnels, facing the extremely complicated geology of the region composed...
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The Common Communication Cable Duct for Bangkok Metropolis
Abstract: Messy line is the common street view of Bangkok. The Underground Electric Cable Projects of Metropolitan Electricity Authority will leave other communication cables to find their space on the street. Bangkok Metropolitan Administration (BMA) was assigned by the Government to study and implement the common communication optical fibre cable duct network to accommodate the abandon cable lines from...
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The Importance and Significant Role of Design in Forming and Delineating an Underground Project’s Risk Profile
Abstract: An underground project goes through various stages throughout its lifecycle, starting from its concept until its constructioncompletion and operation. Every individual stage features its own unique characteristics and particularities; however the design stands out asa prominent element with dynamic inherent potential in defining the project’s outcome. In the present contribution, the important...
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Deformational Behaviour of Ground and Control Measures in Urban Tunneling - A Case Study
Abstract: Ground deformation study is playing a vital role in urban tunneling by means of instrumentation and monitoring. The aim of Instrumentation is to obtain information on ground response, provide construction control, verify design parameters, monitor construction impact on surrounding environments such as ground settlement and ground water regime. From the research point of view, field recorded...
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Importance of Identifying Defects Which Occur During Tunnel Construction for Maintenance, and Examples of Such Defects
Abstract: Maintenance of tunnel structures begins with inspection. Cracks and other defects are frequently found in old tunnels. There are three causes of cracking: external force, material deterioration, and initial defects from construction. As the number of possible causes increases, the determination of cause increases in difficulty. If the characteristics of initial defects are understood, it will...
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Sensitivity Analysis of Enlarging a Large-Diameter Shield Tunnel Using the Pile-Beam-Arch Method to Construct a Metro...
Abstract: When the situation demands the construction of metro station beneath narrow roads, dense buildings or heavy traffic streets, enlarging process based on shield tunnel with Pile-Beam-Arch method would be an effective way to construct a metro station in comparison with other conventional methods. Based on geometrical and structural characteristics of the metro station, FLAC3D is used to build a...
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Diverting the North Yarra Main Sewer - Making Way for the West Gate Tunnel
Abstract: The West Gate Tunnel Project (WGTP) is a significant piece of infrastructure being delivered by D&C Contractor CPB John Holland Joint Venture for the Victorian Government and Transurban, in Melbourne, Australia. The project will deliver twin tunnels under Yarraville, a new bridge over the Maribyrnong River, a widened West Gate Freeway and enhanced interchanges. The diversion of the North...
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Research@ZaB as a Full-Scale Test Site for Geophysical Measurements
Abstract: Consecutive measurements play a key role in the successful construction of underground facilities. While surveying and deformation monitoring are considered as indispensable during tunnel excavation, the prediction of geological conditions ahead of the face and around the tunnel cross-section is a topic of ongoing research. Geophysical methods provide a useful tool to meet this challenge. Since...
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Maturity Modelling for Non-Destructive Strength Development Monitoring of Wet-Mix Sprayed Concrete
Abstract: Early-age strength development monitoring of sprayed concrete is an important aspect of conventional tunnelling. Current strength monitoring practices use destructive type testing, namely stud-driving and core testing. The testing requires direct and recurring access to active construction zones, posing safety concerns for testing operatives. Thus, there is a need to establish a non-destructive...
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Impact and Back Analysis of Deep Excavation on Existing MRT Line under Complex Surrounding Conditions
Abstract: The North-Cross Expressway project in Shanghai were introduced, involving deep excavation above existing Mass Rapid Transit (MRT) Line 13 and corresponding impacts under the complex surrounding conditions. Displacements of the MRT tunnel and retaining walls were analysed in the Plaxis software by using hardening soil model to predict the soil displacement. In additional, backanalysis based on...
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Dubai’s Deep Tunnel Storm Water System - Engineering for Sustainability
Abstract: Dubai Municipality is implementing the Deep Tunnel Storm Water System as part of a long-term catchment-wide plan for capturing and conveying storm water and groundwater flows. Rising ground water levels in Dubai is increasingly an area of concern as the deep foundations and basement structures of the skyscrapers are curtailing the natural pathways for ground water. For majority of the year, the...
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Prototype Loading Tests on the Mechanical behaviors of the Shield Lining Structure of a Water Storage and Sewage Tunnel
Abstract: A sophisticated and flexible testing system that can simulate both external water-soil pressures and inner water pressure was designed, based on which both single-ring and three-ring full-scale loading tests were conducted, and some interesting observations were made: increasing inner water head decreased the axial force, which thereby increased the lining deformation; the bending moment...
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Pressure Distribution in the Mixing Chamber of an EBP Shield
Abstract: The pressure distribution in the mixing chamber of an EPB shield, operating with foam for soil conditioning, quite often has a left-right asymmetry during drilling. The pressures are higher on the side where the cutter wheel is moving upwards. Recently the same phenomenon was found in computational simulations, but only when compressible muck was modelled. For compressible muck, the centre of...
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