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World Tunnelling Congress
WTCThere are 1984 documents.
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Case Study on the Application of Conventional Tunneling Method in Backfilled Ground Condition
Abstract: This study is about the tunnel construction by conventional tunneling method and the ground reinforcement which was formed by the backfill soil. The site is adjacent to railway track and it was backfilled under the emergency condition due to the collapse of temporary earth retaining structures(TERS). The failure surface was along the hidden discontinuity layer under the existing railway track....
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Numerical Investigation on the Enlargement of an Old Existing Tunnel
Abstract: During the last several decades, road traffic has increased greatly in Seoul of Korea and thereby, traffic congestion is now a significant concern in this area. Particularly, traffic jam is common in road tunnels during peak hours. One reason for this problem may be because the tunnels were not designed to accommodate current traffic levels. Moreover, tunnel degradation is also a concern since...
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Design and Cost Optimization using the latest Developments in Risk Analysis
Abstract: The operation of technical systems always induces associated risks. Technical failures, malfunction, failures in operation or misuse may cause different kinds of incidents (breakdowns, collision, etc.) with adverse effects for safety of people, property or environment. The development of a technical system is always combined with efforts to avoid or reduce these risks. In principle this can be...
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An Evaluation on Load-Bearing Capacity of Rock Tunnel Lining against Earthquake-attributed Loading
Abstract: Huge earthquakes can pose serious risks even for rock tunnels, as evidenced by large earthquakes in the past. In a large earthquake in Japan in 2004, some tunnels suffered severe damages including collapse of their permanent lining, even though the tunnels were constructed in ordinary ground conditions. To mitigate such risks, mechanical behavior of tunnel lining during earthquake should be...
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Metro Kuala Lumpur – The Chemical Contribution
Abstract: Malaysia’s first Mass Rapid Transit (MRT) project was officially launched on July 8 2011. The total length of 51km stretches across Klang Valley, 9.5km running underground with 7 stations across the busiest city center of Kuala Lumpur. MRT is expected to be in operation by end of 2016. The project was awarded to MMC Gamuda KVMRT (T) Sdn Bhd. The geological conditions of the Klang Valley makes...
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A study on the segmental lining design for bored tunnel in high water pressure condition
Abstract: This paper describes the concepts of design at high water pressure and impermeable ground condition in shield tunnel lining though the comparison with various design methods (elastic equation, closed form solutions, beam-spring model. Consequently, the appropriateness of various design methods depend on the main load acting on segmental lining. So, there are important of the appropriate...
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Numerical Study on the Resistivity Tomography Applicable to TBM
Abstract: Various kinds of geological surveys, such as drillings, geological mapping, and geophysical surveys, are generally conducted to clarify the ground condition of the proposed tunnel route and/or the existence of anomalies to allow proper design of the tunnel. The geological survey performed in the design step mostly focuses on estimating the overall ground condition or underground geological...
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Tunnel excavation effect on pre-existing underground structure
Abstract: The scaled model tests of closely-spaced twin tunnel by using homogeneous material are per- formed and induced displacements are measured around the tunnel openings during excavation. The influence of separation distance between tunnels and the coefficient of earth pressure (K) on the behavior of closely-spaced tunnel are investigated. The results are expressed by the induced displacement...
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The Analysis of the Lining Cracks Caused by the Cavity behind Lining in the High-speed Railway Tunnel Based on XFEM
Abstract: For the past ten years, a large number of tunnels have been built with a large-scale construction of high-speed railway in China. Some severe repair and maintenance problems follow it at the same time, in which the lining crack and cavity behind lining are two major potential threats to the traffic safety of high-speed trains. It is very common for the separate research about the reducing of...
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Bonded strip termination for connecting tunnel cross passages
Abstract: Under the German Railway Regulation RIL 853, long railway tunnels must consist of two single-track tunnel tubes connected every 500 m by cross passages, to ensure an escape route from one tunnel to the other in the event of fire. Because of the almost circular shape of these single-track main tunnels and the requirement that they should be made to hold back water under hydrostatic pressure,...
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Tunnel Kresna – Challenge for Designers and Constructors
Abstract: There are several corridors of Trans-European Road Network across Bulgaria. One of them is corridor no. IV that secures north-west connection of Bulgaria to Aegean Sea in part of Sofia – Kulata – Thessaloniki. Name of the corridor in this part of Sofia – Kulata is “Motorway Struma” there is a river flowing in parallel to motorway with the same name. Motorway is divided into four sections: Lot 1...
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The Application of Movable Support System in Deep Foundation Pit
Abstract: Using the 6th Bid Project of Metro Line 16 as the background, the article introduces the movable support system used in foundation pit excavation. The main difference between this new technique and traditional ones is that support members are set up rapidly and stably through specific preset tracks. A movable support system manages to speed up the construction progress, therefore, shortens the...
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Considerations regarding water mist as a safety measure
Abstract: In the Netherlands the Minister of Transport set two preconditions that have to be met when using water mist as an additional (not mandatory) measure. It concerns the issues of proven / non proven technology and cost effectiveness / proportionality. An analysis shows that application of water mist in the situation with one-way traffic and longitudinal ventilation, together with the other usual...
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Solving Tunnel External Loads Based on Betti’s Reciprocal Theorem
Abstract: Soft ground tunnels are vulnerable to a variety of defects during operation. With rapid development of urban rail systems worldwide, especially in China, tunnel structural health assessment has brought extensive attention. Surrounded by soils and groundwater, tunnels are different from bridges, buildings, roadways and other above-ground structures due to the uncertainties associated with the...
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Research on Rapid Calculating Method of Seismic Analysis of Immersed Tunnel
Abstract: Seismic performance of the immersed tunnel as long underground structures is similar to the pipelines. In the action of earthquake, the dynamic response and stability is determined by the surrounding soils, not the structures. But the deflection of structures should be coordinated with the soil. It is very important to know appropriate history of ground failures in past earthquake such as...
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Investigation of the influence of cracking on the stiffness and capacity of segmental tunnel lining
Abstract: The rotational stiffness of cracked segments reduces the overall stiffness of the segmental lining ring and may influence the stiffness and capacity of lining system compared to that assumed in the design. This paper firstly investigates the non-linear behavior of the longitudinal joints and cracks by comparing analytical closed form solutions with the results of numerical analyses. Then, the...
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