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World Tunnelling Congress
WTCThere are 1984 documents.
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Instrumentation and Monitoring for MRT Orange Line (East Section) Project
Abstract: In the underground construction of MRT Orange Line (East Section) project, the instrumentation and monitoring works play an important role for construction safety control. The overview of instrumentation schemes for underground structures (i.e. underground stations, ventilation/intervention shafts, cut&cover tunnels, bored tunnels), underpinning structures and adjacent utilities/buildings...
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Ground Improvement Applications for MRT Orange Line (East Section) Project
Abstract: The overview of ground improvement applications by jet grouting method for underground structures (underground stations and bored tunnels) between MRTA Station (OR14) and Pradit Manutham Station (OR15) of MRT Orange Line (East Section) project is presented in this paper. The main purposes of ground improvement are 1) to ensure water tightness for TBM break-in/break-out at stations 2) to control...
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Challenges in Design and Construction of Bangkok MRT Orange Line Project
Abstract: The MRT construction works in Bangkok are more complicated than works in earlier projects. As the tunnel alignment passes through the congested urban areas in the city, it either clashes with or passes beneath several pre-existing structures. Underpinning works are then required. Assessment of movement of ground and structure plays an important role in the project. Besides, the rebound of...
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Exploiting Civil Underground Space for Sustainable Urban Development in Vietnam
Abstract: ITA-AITES World Tunnel Congress, WTC2020 and 46th General Assembly Kuala Lumpur, Malaysia 11-17 September 2020 Exploiting Civil Underground Space for Sustainable Urban Development in Vietnam Nguyen Tuan Hai Hanoi Architectural University, Hanoi, Vietnam. Email: haint@hau.edu.vn ABTRACT: The spirit of Sustainable Development can be encapsulated in " the development that can meet current needs...
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Design and Construction of an Intervention Shaft of MRT Orange Line Project
Abstract: Currently, the Orange Line East Project of Mass Rapid Transit Authority of Thailand (MRTA) is being constructed. The main structures of this project consist of cut and cover tunnels, intervention shafts, stations and bored tunnels. For the intervention shafts (IVS), the depth of excavation is approximately 25 to 40 m from ground surface using top-down construction. The IVS has 4 to 5 permanent...
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Construction Simulation of Large Diameter TBM Tunnelling in a Sharp Curve Alignment in Soft Clay Using 3D Numerical...
Abstract: This paper presented a case study on the numerical simulation for construction of large dimeter TBM tunnelling in a sharp curve alignment. It took Shanghai North Crossing Channel as a case to analyse the tunnel settlement and alignment offset during the construction. A notable feature and difficulty in this project was that larger-diameter tunnel (15.56m outer diameter) run in soft clay with a...
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Green Square - Trenchless Construction for Australia’s Largest Urban Renewal Project
Abstract: Sydney’s Green Square is Australia’s largest urban renewal project, which involved transforming old industrial land into a major new residential, retail and cultural hub. The Green Square Stormwater Drain came about through a strategic alignment between City of Sydney and Sydney Water to address flooding in the Green Square area. Through a process of optioneering and hydraulic analysis, a new 2...
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Influence of Ground Stiffness on HandV Shield Behavior
Abstract: Shield tunnelling technology has been widely used in soft ground conditions to minimize the ground movement and the damage to neighboring structures around a tunnel. Due to limited underground space in urban area and for saving construction cost, multi circular face shield (MF shield) had been innovated to construct a twin tunnel at once. Furthermore, according to the more severe restriction of...
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Evaluation of Tunnel Lining Structures Built in Expansive Rocks Considering Ground Water Effect
Abstract: The construction of tunnels excavated in expansive and water-rich rocks involves significant concerns for the safety of lining structures. This paper focuses on an ongoing tunnel excavated in silty mudstone within water-rich strata. Laboratory mechanical test and mineral composition analysis are conducted to investigate the expansive characteristics of rocks. It is analysed that the rocks...
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An Explicit Numerical Manifold Method and Its Application on Modelling Tunnel Failure Process
Abstract: The failure of tunnel can affect personal safety and even result in great economic loss. Investigating the failure process of tunnel is one of the key issues of rock mechanics. In this study, the failure process of a deep buried rock tunnel is numerically investigated by the numerical manifold method. An explicit numerical manifold method (ENMM) based on the Newmark time integration method is...
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Crossing Nee Soon Fault and Springleaf Station (TE4) with Slurry TBM
Abstract: The Nee Soon Fault is one of the known faults in Singapore. It strikes in NW-SE direction along the contact between Bukit Timah Granite and Old Alluvium and the younger Kallang Formation. As this few kilometer-long lineament was confined to the granite, it was associated with tectonic uplifting in early Triassic or during the later period of block faulting, reactivated strike-slip movement in...
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Operation and Maintenance Costs of Subsea Road Tunnels in Norway
Abstract: In Norway, there are currently more than 30 subsea road tunnels in operation. The Vardø Tunnel was the first one, finalized in 1983. In general, road tunnels require rock support for its stabilization along with other materials, equipment, consumptions and activities that affect the cost during their Operation and Maintenance (O&M). These resources aim to fulfil requirements related to...
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Mega Transport Projects and Politics: East Coast Rail Link, Malaysia
Abstract: The East Coast Rail Link (ECRL) qualifies as a Mega Transport Project (MTP) since its original contract sum was a hefty RM65.5 Billion. This paper attempts to explore if the decision-making criteria adhered to “iron triangle law” at the early project appraisal stage, and also the related “cost-benefit analysis”. Often, the “iron triangle” criteria is hardly applied by decision-makers in this...
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Lattice Girder Assemblies for Use as Final Concrete Liner Reinforcement
Abstract: As the use of lattice girders for initial ground support has matured, this paper explores the advancement and design development of lattice girder type systems for use as final cast-in-place concrete liner reinforcement. The studied area of application includes underground caverns, stations, and tunnel cross passages which typically require hand-tied rebar mats to accommodate the varying...
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Influencing Factors of Metro Light Environment Satisfaction
Abstract: In this paper, all the operating stations in Chengdu are selected to measure the illuminance values of different areas in the field, and the passengers are surveyed online. Then the SPSS is used to analyze the survey data, and the principal component analysis method is used to classify the factors affecting passenger satisfaction in different regions. The conclusion is that for the entrance and...
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Use of Spile Umbrellas for Load Transfer and Prevention of Settlements
Abstract: For sprayed concrete tunnelling in loose soils, spiles and face-bolts are often employed as micro pile systems to stabilise the roof and the face of the tunnel. In this paper, four different construction methods of spile umbrellas will be presented for which extensive site measurements are available. These results will be compared with values from numerical simulations on a three-dimensional...
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