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World Tunnelling Congress
WTCThere are 1984 documents.
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Water inflow analysis in to TBM tunnel - Case study Nowsud Tunnel in Iran
Abstract: Groundwater inflow into tunnels is an important factor which, especially in TBM tunnelling, effect the time and cost of tunnel implementation .Water inrush can also impact on the environment conditiopn of tunnel area.Then, the more accurate assessment of expected flow and understanding the mechanisem of water seepage toward tunnel are among the key issues. In this context, empirical, analytical...
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Energy Efficiency studies for the Folgoso Tunnel. Introducing the new TUNELEC, a portable device for electrical...
Abstract: Tunnels have a series of facilities to provide security and comfort to users, such as lighting, ventilation, video surveillance, etc. Geocontrol, S.A. is a consulting and engineering company founded in 1982 developing an intense consultancy activity in performing projects and monitoring the construction of civil works; particularly with regards to tunnels and other underground works. During the...
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Experiences in the construction of the Interstation Tunnels of L-6 Santiago Subway (Chile)
Abstract: This work presents the experiences during the construction of 15 Km of the Interstation Tunnel of L-6 of Santiago Subway (Chile), where the Consortium Zañartu-Geocontrol proposed a new method for constructing this tunnel. The proposed new method takes advantage of the excellent behaviour of the ground, called “ripio de Santiago”, to excavate the tunnel by full face. The results obtained by the...
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Koralmbahn-Challenges and solution concepts for the realization of the lot KAT 3 of the Koralm Tunnel with a major...
Abstract: The Koralmbahn is one of the largest rail infrastructure projects in Europe. It is an essential key project in the Baltic Adriatic Axis within the Trans-European Networks. The Koralmbahn crosses the Alps in the east over a distance of 127 km in the south-eastern part of Austria. The double- track electrified new line is established for a maximum line speed of 250 km/h and includes 15 stations...
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The design of the Fehmarnbelt Tunnel
Abstract: Since the signing of the treaty in September 2008 by the Danish and the German Ministers of Transport, many various options for the crossing of the Fehmarnbelt have investigated. All the hard work done by the Ramboll-Arup-TEC (RAT) joint venture was justified by the decision in 2011 by the Danish Parliament to develop a Plan Approval and Tender design for an immersed tunnel as the preferred...
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Temporary Tunnel Support Strategies: Optimization and Testing
Abstract: When designing and constructing support systems for tunnels in weak ground, oftentimes a temporary support regime is utilized in order to provide provisional support until the final liner is installed. These support systems are primarily designed contingent upon the ground conditions that are anticipated. The assortment and arrangement of such support systems are many and involve but, are not...
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Harmful Gas Eruption Prediction and Its Protection Based on Solid-Fluid-Gas Coupling in Shield Tunneling
Abstract: In some cities in southern China, the shield machine will be encountered the geological environment of explosive harmful gas in the process of metro tunneling, combined with the shield machine does not have explosion-proof function, that is likely to cause harmful gases gush out in a moment and induce harmful gas exceed standard even explode. Therefore, solid-fluid-gas coupling theoretical...
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Major Cavity Formation and its Rehabilitation measures in Head Race Tunnel of RHEP-412 MW
Abstract: Hydropower projects developed in mountainous regions throughout the world are generally associated with adverse and challenging geological conditions which in some cases manifest themselves into formation of large underground cavities. Formation of large underground cavities is broadly associated with either weak rock conditions which are very common in complex geological environment or...
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Load capacity of inner lining systems due to impact from falling rocks
Abstract: Inner lining systems in tunnels is a method to prevent water ingress in the traffic area. The method is commonly used in countries with cold climate and is often combined with a conventional near-rock strengthening. Although many established inner lining systems exist, challenges still re- main to find the optimal solution considering function, maintenance and investment cost. In e.g. Norway,...
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Connecting Shield Tunnels to Deep Undersea Caisson Arrival Shaft
Abstract: In a thermal power plant renewal project, seawater intake shield tunnels were connected to a seawater intake structure built by the pneumatic caisson method. The shield machine bored a tunnel to a point at the bottom of the seawater intake structure (caisson) doubling as arrival shaft. Due to high water pressure (0.34 MPa) at the shield machine arrival point, there was concern regarding sludge...
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Construction of a station over existing revenue tunnels
Abstract: Construction of a cut and cover station structure above two operating tunnels with a cover of 1.0 m presents design and construction challenges. The design has been prepared by considering the locked in forces and the expected displacements; both rigid body and due to ovalization. An elaborate instrumentation system has been laid down to validate the design, as well as to mitigate any condition...
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Urban Tunnelling: The Vauxhall Underground Station Upgrade
Abstract: The Vauxhall Station Upgrade project is currently under construction in, UK by Bechtel Ltd. (Bechtel) as the main contractor, with Sprayed Concrete Lining (SCL) designed by Gall Zeidler Consultants (GZ) in a design-build procurement model. A mandate of London Underground (LU) is to provide Step Free Access for disabled customers in any station which undergo upgrade schemes. To provide this...
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Immersed Tunnel: A Viable Option for The Orlovsky Crossing
Abstract: Immersed and Floating Tunnelling. The Orlovsky crossing in St. Petersburg has been a hot topic over the past years. St. Petersburg faces a constant balancing act between river navigation and road traffic. In the ice-free period, the bridges over the Neva River open nightly for an extended period of time to allow ships to pass, stopping road traffic for several hours. A tunnel would provide the...
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Advances in Optimum Ventilation Control for Road Tunnels
Abstract: Major improvements in road-tunnel safety could be implemented within the first decade of this century. The few years immediately following the large fires in the Mont Blanc (1999), Tauern (1999) and St. Gotthard (2001) mainly focused on technology and organization. New technologies were developed for a rapidly growing market and new equipment was installed. Concurrently, the necessary...
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The first successful experience in Poland of tunnel excavation with EPB for the Metro Warsaw
Abstract: The Metro Line 2 of Warsaw is a urban underground railway, being part of the city’s strategy for sustainable transport. Its construction was awarded to a Joint Venture leaded by the Italian company ASTALDI S.p.A.. At the end of 2013 the J.V. successfully completed the construction of the two tunnels which represent the most interesting and challenging part of the project, with the use of 4 TBM...
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A comparative study of mountain tunnel subjected to seismic load using 2D and 3D numerical simulations
Abstract: In the 2008 Wenchuan earthquake, more than ten mountain tunnels in operation around the epicenter suffered severe damages. Among all the damaged tunnels, the Longxi tunnel was the most special one which is located at a distance of 2 km from the epicenter of the earthquake. For the seismic design of tunnel structure, an effective simplified approach, two-dimensional finite element model is...
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