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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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Study on numerical simulation of seismic response for underground tunnel across fault
Abstract: Fault fracture zone is the seismic weak link of tunnel structure. Aimed at the dynamic interaction characteristics between surrounding rock and fault under seismic load, a dynamic contact force method considering several contact states is built. Considering point to point and point to surface contact in finite element model, the method can simulate four contact states between the rock and...
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International best practice in the prevention of illness and disease in tunnel construction workers
Abstract: Each year, over 250 workers in Australia die from an injury sustained at work, while over 2,000 workers will die from a work-related illness. (SWA, 2012) Construction is a priority industry for work health and safety, with controlling exposures to diseasecausing hazards identified as an area requiring improvement. (SWA, 2015).Tunnel construction workers have an increased risk of developing many...
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The structure performance-based seismic design method for tunnel
Abstract: At present, the research on performance-based seismic design of tunnel structure in tunnel field is not as systematic as bridge and high-rise building. However, from the previous earthquake damage experience, the increase in the development of tunnel construction in the region of high earthquake intensity and the development of national “traffic infrastructure major structural security strategy...
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Study on the Behavior Dynamic at the Earthquake of the Crossing Direction of the Tunnel Sections with Non-uniform...
Abstract: Tokyo Metro Co. Ltd. operates 9 routes in Capital area in Japan, total length of the routes is 195.1km. The total length of tunnels is 166km.In Japan, subway tunnels constructed by the open-cut method are typically horizontally oriented double cell box tunnels with rectangular cross sections. The open-cut method involves excavating parts of public roads, installing tunnel frames in place and...
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Structural noise and third parties when TBM-tunnelling in urban areas
Abstract: This paper describes how tunnelling in urban areas poses challenges with respect to structural noise and risk of limited TBM operation time. The ongoing construction of the tunnel section of The Follo Line Project requires many considerations as the tunnel boring machines work their way through several densely populated areas with occasional limited overburden. The structural noise generated by...
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Smart Tunnel and Risk Analysis
Abstract: This paper presents a new approach about safety in tunnel that exploits innovative technologies to have accurate information in tunnel about safety system, traffic and environmental conditions in order to manage operational or additional measures.The technological innovation allows reaching high levels of safety through low costs knowing in real time, what happens inside the tunnel...
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Different Effects Analysis of Adjacent Construction to Existing Tunnel in Soft Clay
Abstract: With the continuous development and utilization of urban underground space, new urban tunnels will inevitably affect the formation of nearby existing structures. Methods to minimize the environmental impact induced by adjacent construction have been a hot topic of research in recent years. Based on different cases of adjacent construction to the existing tunnels in Shanghai, many different...
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Flood measure of the Underground station of Tokyo Metro
Abstract: Tokyo Metro Co., Ltd. (hereinafter, Tokyo Metro) comprises 9 routes in capital area of Japan operating over 195.1 km and 179 stations, and is used by 7.24 million passengers per day. Tokyo Metro operates on the belief that security equals safety plus service. In regard to safety, special effort is devoted toward countermeasures for natural disasters. In light of recent extreme weather events,...
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Long-term vision and working programme on tunnels in the Netherlands
Abstract: The position of tunnels in their immediate environment and the transportation network is changing. Sustainability is becoming more important and increasingly higher demands are placed on the reliability and availability of tunnels throughout their entire life cycle. Faced with a huge renovation task, COB has formulated a longterm vision, to support and challenge all stakeholders, including the...
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Working Towards a Zero-Energy Tunnel: Technical, Contractual and Process Solutions
Abstract: The Dutch Ministry of Infrastructure and Environment, Rijkswaterstaat (RWS) is taking on a major challenge in order to achieve its policy objective: 20% energy reduction in 2020 compared to 2010. This means that the energy demand of existing and new tunnels must be reduced by at least 48%. In order to achieve this objective, different expert teams within the Netherlands Knowledge Center for...
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Proposed Methodology for Clogging Evaluation in EPB Machines
Abstract: Clogging occurrence has long been an issue for EPB drives, through not only pure clay soils, but also in mixed soils with sufficient clay content for clogging to happen. It occurs when clay particles adhere to metal surfaces of excavation tools because of the attractive forces of the clay particles and the presence of water between the clay-metal surface. The occurrence of clogging in Earth...
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Crack formation and damage evolution during consolidation in TBM driven tunnel linings in fine-grained soils
Abstract: The paper deals with the numerical modelling of crack formation in segmental tunnel linings. A series of numerical analyses was conducted using the finite difference code FLAC2D. The primary aims of the analyses were to back-analyse the damage pattern observed in a TBM driven hydraulic tunnel excavated in clayey soils and to evaluate the safety level of the excavation assessing the stress and...
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Excavating Turkey’s Hardest Rock at the Bahce-Nurdag Railway Tunnel
Abstract: Southeastern Turkey’s Gaziantep province is characterized by complex fractured rock within the Eastern Anatolian Fault, and it is now the location of an important railway tunnel project. With a population of nearly 1.7 million, the province is overhauling its public transportation with a rail line between the towns of Bahçe and Nurdağı. The Bahce-Nurdag Railway Tunnel consists of two parallel...
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Design of Primary lining (Diaphragm wall) at Kirtling Street Shaft for Thames Tideway Tunnel, Central Contract
Abstract: Thames Tideway Tunnel project is a new 25 km long combined sewage storage and transfer system beneath the River Thames in Central London currently under design and construction. Three design and build contracts have been awarded. The contract for the central section, the biggest and most challenging one, consists of 12.7 km of tunnel and 8 sites with deep inlet shafts and ancillary...
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An empirical design tool to predict ground surface response to tunneling with TBM
Abstract: Current tunnel design methods include empirical and analytical solutions that correlate ground movements, to soil conditions and tunnel characteristics (size and depth). These methods do not relate movements to different tunneling processes or operational parameters and therefore are not helpful in assisting engineers to specify appropriate construction methods. Several analytical and numerical...
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The Effects of TBM Operational Parameters on Excavation Performances in Complex Geology when Driving Twin Tunnels in...
Abstract: The geology of Istanbul is complex, changing frequently from very hard rock formation with different degrees of fracturing to soft ground in a short length. Twin tunnels which were excavated by an EPB-TBMs in Istanbul Metro Projects, gave the opportunity to investigate the effect of geotechnical properties, EPB pressures in virgin and disturbed zones by the excavation, on the performance of a...
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