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World Tunnelling Congress
WTCThere are 1984 documents.
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Analysis of Ground Movements Induced by Shield Tunneling
Abstract: In this paper, the role of slurry shield tunnel boring machine main components on ground movements is examined. Tunneling process was simulated using 3D finite difference method. The numerical model simulates the main operational parameters of the shield tunneling process. Advanced numerical schemes were used to model the shield-ground interface and the backfill process including grout...
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Analysis of the Squeezing Phenomenon and Rehabilitation of La Linea Tunnel
Abstract: La Línea tunnel corresponds to one of the most important road tunnels in Colombia, 8.6 km long, 14 m of diameter, with high overburden in excess of 800m, built in a complex tectonic geological environment in the Andes. The presence of several geological faults, where the squeezing phenomenon predominated and was classified as highly severe, accompanied by time dependent behavior affected the...
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Analytical study on time-dependent behaviour on the stability of tunnel face
Abstract: To construct a tunnel safely and economically with the conventional tunnel construction method, it is most important to ensure the standing time of the tunnel face. One of the authors measured the amount of tunnel face extrusion to understand the displacement behaviour of the weak ground during tunnel construction. The measurement results show that the displacement of the tunnel face has a...
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Anti -Collision Systems in Tunne lling some Preliminary Test s Outcome on
Abstract: Underground works are generally characterised by the presence of narrow operating spaces, high concentrations of high-power equipment, use of iterative work cycles and haste in the excavation phases. These characteristics can cause interferences with a negative impact on production efficiency and can cause accidents and harmful pollution. As shown by the statistics on work-related accidents,...
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Applicability of Three-Dimensional Electrical Survey to Groundwater Flow
Abstract: In mountain tunnel construction, the ground of the area around the tunnel receives some effects from the flow of groundwater. The common way of grasping those effects is to bore groundwater observation holes to measure the level of the groundwater and grasp the situation regarding groundwater distribution. However, this is point data for wide-area ground, which means a large number of...
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Application of Disc Cutter Real -time Diagnosis in Shantou Gulf Tunnel
Abstract: ITA-AITES World Tunnel Congress, WTC2022 and 48th General Assembly Bella Center, Copenhagen 2 - 8 September 2022 Application of Disc Cutter Real-time Diagnosis in Shantou Gulf Tunnel X.L. Wei1, F.L. Lin1, X.B. Meng1, S.L. Zhou1, J.K. Guo1, H. Sun1 1 China Railway Engineering Equipment Co., Ltd. Zhengzhou, Henan, China E-mail: shijiesuidaodahui@163.com Abstract: Shantou Gulf Tunnel is...
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Application of Risk Management on the Kalvebod Brygge Climate Resilience Tunnel
Abstract: The challenges of Climate Resilience in cities requires infrastructure solutions involving complex tunnelling within urban environments. Such projects involve numerous risks which need to be managed as projects are realised. This paper presents the collaborative and integrated approach to risk management during the planning and design phase of the Kalvebod Brygge Climate Resilience Tunnel. To...
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Application of the Socratic Method to Permit -to-Tunnel (PTT) meetings
Abstract: Australian Tunnelling works require regular Permit to Tunnel meetings (PTTs). PTTs play a major role for Sequential Excavation Tunnels, where the support relies heavily on observed geotechnical conditions. Tunnelling projects are renowned for uncertainty and unbalanced risk allocation. Combined with tight programmes and limited skilled workforce, they produce overworked professionals with...
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Applying distributed optic fiber sensor for tunnel monitoring
Abstract: Structural health monitoring has become an important aspect in tunnel engineering due to the increased need for maintenance for aging tunnels. Various types of sensors have been employed to monitor the behaviour of tunnels during their service phase. Distributed optic fiber sensor (DOFS) is a new type of sensing technology which has been used recently for structural monitoring. This sensor...
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Applying machine learning for ground type detection using monitored earth pressure
Abstract: Geological uncertainty poses significant risk for soft ground tunnelling. The current ground mapping relies on a few boreholes to estimate the geology along the tunnel alignment via either expert judgment or geostatistical modelling, which is inevitably uncertain due to borehole sparsity. As earth pressure balance tunnel boring machine (EPBM) behaviour changes in various grounds and are...
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Applying machine learning on airborne geophysical models to map bedrock
Abstract: Large scale infrastructure projects are often plagued by significant cost overruns as a result of unknown ground conditions. These delays are often a result of the difficulties of obtaining accurate and seamless information of the subsurface geology. Airborne Electromagnetic (AEM) systems provide rapid acquisition of large amounts of geophysical data, penetrating several hundred meters into the...
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Artificial intelligence and multimodal imaging for tunnel inspection
Abstract: Early detection of damages in tunnels is a major issue in terms of cost and safety. As there is a wide range of possible damages, varying in size and nature, at times at the limit of detectability, automatic detection based on images is a challenging goal. Cracks are the most common one, but water infiltrations and loss of material, such as exposed irons or spalling, are also present. Recent...
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Artificial Neural Network Model to Predict Surface Settlements Caused by
Abstract: Utilization of TBMs in urban tunnelling is increasing due to the infrastructure requirements of modern-day cities. On the other hand, settlement related risks are still one of the most important considerations which require comprehensive preliminary studies and calculations with very sensitive excavation procedures. In this study, deformation measurements obtained from the deformation stations...
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Artificial Neural Network use for Pile Settling Prediction in Tunnel Works
Abstract: Within the context of pressure of available surface space, tunnel works turned out as solutions for e.g. people and goods transportation. Nevertheless, in densely occupied urban centers, these tunnels can interact with the preexistent buildings in a negative way, inducing foundation settlements, which can be the origin of damage to buildings. That said, a tool is developed to interpolate those...
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Assess ment of MRT Tunnelling CrossingExisting DrainageTunnel
Abstract: The impact of tunnelling on existing tunnels plays an important role during planning and execution of tunnelling works in the urban area. An existing water drainage tunnel operated by Bangkok Metropolitan Administration so-called “BMA tunnel” is crossed by westbound and eastbound tunnels of the recent Bangkok MRT Orange Line project. The westbound lower tunnel passes perpendicularly below the...
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Assessing the Resilience of Road Infrastructure
Abstract: The Federal Highway Research Institute (BASt) has initiated an external research project to develop a concept for resilience management for federal trunk roads in Germany. Based on the analysis of the current state of research and the results of two previous external research projects of BASt, a modular concept for resilience management has been developed. It describes an iterative management...
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