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World Tunnelling Congress
WTCThere are 1984 documents.
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The Analysis of Excavation Sequence Effect of Overlapped Shield Tunnel in Sandy Cobble Ground
Abstract: The mechanical behavior of the overlapped region of shield tunnel in the sandy cobble ground is complicated, which differs from other constructing ways under common geological conditions. Combined with the construction of overlapped shield tunnel in the Baicao Road interval of Chengdu second Metro, the 3-D finite difference model was built. The overlapped tunnels mainly go through...
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Real-time visualization of road tunnel safety status
Abstract: Operators in road tunnel control centers are faced with an increasing number of tunnels to be monitored, connected with a flow of information from different sources like safety equipment or traffic data. On this basis, operators have to assess the tunnel safety status continuously, and initiate measures in case of risk or incident situations. Especially if critical situations in different...
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Study on Damage to Railroad Mountain Tunnel Caused by Earthquake and Seismic Retrofit of Shinkansen Tunnel
Abstract: This paper outlines seismic damage to tunnels and seismic retrofit to prevent heavy seismic damage to mountain tunnels. Some tunnels had suffered heavy seismic damage from earthquakes in 2004 and 2007. Through detailed investigation of tunnels and ground properties around tunnels, authors confirmed the cause of the seismic damage. And, based on the damage analysis, authors categorized the...
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New design of a single arch deep located station for Kyiv metro
Abstract: After analyzing several designs of the deep located single arch metro stations in Moscow and Petersburg authors decided to develop a new design for the ground conditions in Kyiv but faced with a problem of the impossibility of erection of such structures without massive side walls. The walls are constructed in the TBM pilot drift, so the axis of the pilot drift doesn’t coincide with the axis of...
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Tunnelling on Legacy Way Project
Abstract: Legacy Way is Brisbane’s tolled 4.6km road tunnel that will connect the Western Freeway at Toowong (western end) with the Inner City Bypass (ICB) at Kelvin Grove (eastern end). The Transcity JV, formed by Ghella, Acciona and local BMD, has been awarded with the AU$ 1.5 Billion contract to design and build as well as operate and maintain the tunnel for 10 years by the client Brisbane City...
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On the concept of “Risk Analysis-driven Design”
Abstract: In the current tunneling practice, the Risk Analysis and the structural Design are frequently considered two separate and independent items. On the contrary, according to the Geodata Engineering (GDE) approach they are integrated in one unique rational process, completely developed by probabilistic method, structuring the so-called “Risk Analysis-driven Design (RAdD)”. The key points of this...
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Factors affecting operation, maintenance and costs in subsea tunnels
Abstract: In Norway we now have 32 Subsea road tunnels, and more are to be built in the coming years. Up to now operation and maintenance cost has been underestimated. Partly because there has been a relatively low standard in the road tunnels in Norway, but also because of the new regulations given among others from the EU. Another parameter is that operation and maintenance cost has not been...
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Empirical Basis for the Design of Tunnel Linings in Swelling Rock containing Anhydrite
Abstract: Due to the great complexity of swelling processes in rock containing anhydrite, fre-quently encountered highly variable geological conditions and the changeable hydraulic conditions, a theoretically based estimate of swelling pressure is not possible. As an orientation up till now the results of laboratory swelling tests were frequently used. These, however, can lead to unrealistically high...
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Geothermal heat from the Turin metro south extension tunnels
Abstract: Underground geotechnical structures (piles, diaphragm walls, tunnel linings, anchors, etc.) can be instrumented to become energy geo-structures. This paper focuses on the use of energy tunnels, which are shown to have a number of advantages. An example of a possible application to the Turin Metro line 1 South Extension is discussed. Preliminary results of numerical analyses,...
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A unique technology for early fire detection in tunnel environments
Abstract: This paper outlines the challenges involved in the design and implementation of anefficient and safe system for detection of fire incidents in road tunnels. It furthermore outlines thepossibilities of Multiple Gas Detection technology (MGD) as solution to improve safety in tunnels.
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Development of Resource-efficient and Advanced underground technologies - DRAGON
Abstract: Goal of the DRAGON project is to achieve a higher grade of resource efficiency in tunneling and other underground construction processes by turning the excavation material into a valuable resource for other processes and sectors such as the cement, steel, ceramic or glass industries. The project sets out to solve this challenge by developing a prototype system for the automated online analysis,...
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Ground arching induced by the non-uniform ground deformations
Abstract: When a tunnel is excavated, the ground above tunnel crown can be loosened and ground arching can be developed. And their size and shape would be dependent on the ground deformation characteristics and the distribution shape of local ground deformations. Terzaghi showed that the ground arching was developed due to the uniform ground deformations in the trap door tests. In this study, the...
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Multi-level fuzzy evaluation model for karst highway tunnel safety
Abstract: To analyze tunnel safety, the coupling effect of multi-factor should be taken into account. Referring to railway tunnel health evaluation model, the karst highway tunnel safety is classified into five grades. After that, the factors affecting tunnel safety are dealt with by the way of Analytic Hierarchy Process (AHP). Then, the qualitative indexes are classified into five levels according to...
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The construction of the Vivaceta Tunnel (Santiago de Chile)
Abstract: The tunnel of Vivaceta is located at Santiago de Chile and has a total length of 525 m, involving also an intermediate shaft, and the crossing under the Mapocho River using a cut and cover tunnel. The tunnel is being excavating in the well-known gravels and pebbles of the second and first deposition of the Mapocho River. At the South side of the river fill materials cover these alluvial. The...
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Tunneling to the origin of civilization in Istanbul
Abstract: Istanbul city is the only city founded on two continents and have been the capital of three empires; Roman, Byzantine and Ottoman, nurtured by these civilizations. Marmaray Tunnel project to connect Asia and Europe began in 2004. The total length of the project is 77 kms and consists of immersed tube tunnel under Bosphorus, bored tunnels under the city on European and Asian sites and four new...
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Design of 20 m Deep Excavation with Permanent Anchored Secant Bored Pile Wall (SBPW) and Contiguous Bored Pile Wall...
Abstract: Deep excavations are common for tunnel constructions in urban areas nearby existing structures. In this paper, design of deep excavation of cut and cover tunnel for Portal of dual tube Konak Tunnel in the Konak Square in İzmir, is presented. The maximum height of excavation is 20 m. At the right side of excavation section with maximum height, adjacent 5 storey masonry museum building is...
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