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World Tunnelling Congress
WTCThere are 1984 documents.
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Proactive risk management - Helping to drive down insurance premiums and project costs
Abstract: Risk is ever present in the underground works sector; however through proactive risk management and involvement of a risk advisor at an early stage, associated risks can be understood, allowing for informed decisions about the financial aspects of project risk and requirements for insurance. The result is lower premiums, hence lower total cost of risk and cost savings, reducing the final...
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Study on construction period and cost management in long drill and blast railway tunnel
Abstract: Based on division of tunnel construction procedures, through extensive investigation, site survey and expert interview, distribution characteristics of time and cost of each constructing activity is obtained. By using Monte Carlo method, relationship between time and cost of tunnel construction can be acquired. An original software is programed based on web platform to calculate the...
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Impact of Water Mist Fixed Fire Fighting Systems (FFFS) on the Safety of Users and on the Tunnel Structure...
Abstract: Fixed Fire Fighting Systems (FFFS) are commonly recognized to mitigate the fire development and to minimize the negative effects on the tunnel structure. The given paper analyses the effect of FFFS on both, safety of users and structural safety based on results from the SOLIT2 project. Within the scope of the SOLlT2 project, the efficiency of water mist fire fighting systems in...
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Long-term deterioration prediction of cut-and-cover tunnels affected by carbonation or chloride attack based on...
Abstract: In this paper, the parameters for long-term deterioration prediction of subway tunnels in Japan are clarified by the analysis of field data. In Japan, many reinforced concrete structures have been damaged by carbonation or chloride attack, and most of Japanese subway tunnels are built using reinforced concrete. Therefore, it is important to figure out the parameters. The ratio of concrete...
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Underground Structures for Britain’s High Speed Railway – 130km of bored tunnels, 10km of cut-and-cover tunnels and...
Abstract: The High Speed Two (HS2) railway is currently the largest planned infrastructure project in Europe. For the design of high speed rail tunnels additional aerodynamic aspects need to be taken into account where standards & requirements are currently being developed worldwide in order to ensure the design meets environmental & performance requirements. Underground structures form a...
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Inner lining concept for the Stockholm Bypass
Abstract: The Stockholm bypass will be situated west of Stockholm city center to decrease the north-south road traffic through Stockholm. The bypass consists of more than 50 km of rock tunnels which will be cement grouted to fulfill the ingress demands. In addition to the grouting an inner lining will be installed to protect from ice formations, which in cold countries are common in...
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Multi-hole grouting, field tests to increase the efficiency of the grouting production process
Abstract: Time is a critical factor for tunnel construction and if grouting is required the time efficiency of the grouting procedure is essential for the overall cost of the tunnel construction. In this paper initial field tests of multi-hole grouting are reported and the possible time saving actions described. The test shows that the handling time of the equipment can be...
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Deformation mechanism and effect of countermeasure for tunnel under swelling rock condition
Abstract: Temporary support of tunnel is generally constructed conforming to ground condition on the result of observation and measurement during construction, and permanent lining is constructed after the judgment of convergence of displacement. Deformation and defect during service stage is grasped by periodical inspection, and some countermeasures are performed if necessary. Then, cracks over lining...
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Some unusual aspects in the Construction Management of “La Maddalena” Exploratory Adit in Italy for the Turin-Lyon...
Abstract: The new Turin-Lyon high-speed rail project is halfway along the future“Mediterranean Corridor” connecting Seville in South-Western Spain to Budapest in Hungary. The project includes a 57 km-long Alpine base tunnel, whose construction is expected to start in 2015, making use of data collected from four exploratory adits. The three exploratory adits on the French side of the Alps,...
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Cutting Edge Sprayed Concrete Design to Upgrade an Existing London Underground Station – Bond Street Station Upgrade...
Abstract: Bond Street Tube station is a major gateway to London's West End served by both the Central and Jubilee lines. As part of the London Underground Tube upgrade plan, the station is undergoing a major upgrade to increase capacity, improve accessibility and create interchange with the new Crossrail station. This upgrade project provides two additional escalators from the interchange level to the...
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One-pass Segmental Lining in a Corrosive Environment
Abstract: Tunnels constructed for the purpose of discharging waste water as well as forpreventing wet-weather overflows by intermediate storage are particularly exposed to internalcorrosion due to sulfuric acid attacks. The awareness of the internal corrosive environment has beenincreased by rising expectations regarding life span, which in turn led to higher...
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Large Tunnel Sections for Urban Railways. Special challenges in the design and calculation of the formworks
Abstract: The lining of some large tunnels in the Hong Kong section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link, has required special formwork, properly designed and calculated for the scope. Particularly for the contract C824, the Italian company CIFA Spa has studied two special formwork systems able to realize all the different sections of the 400m long bifurcation cavern, which are variable...
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Theoretical Relationship between Q-system and Electrical Resistivity: Derivation and Field Application
Abstract: The construction of underground infra-structure elements in urban areas is increasinglyrequired. A lack of space on the surface and at shallow depths makes tunnels and underground structures, such as subways and cable tunnels, viable in bed-rock regions. Evaluating the rock conditions around underground structures is important for successful construction in a rock mass. However, typical methods...
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Application and geotechnical verification of the time domain electromagnetic method to a gneiss tunnel site
Abstract: The time domain electromagnetic method, TDEM, was conducted to estimate the geological condition and structure on a gneiss tunnel construction site in the Aichi Prefecture, Japan. Three dimensional distribution of resistivity were obtained by plural three measuring lines with TDEM and geological distribution and geotechnical problems were inferred. This paper described the estimation results of...
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Experimental Research and Numerical Analysis on the Tunnel Element Mooring for the Hong Kong - Zhuhai - Macao Bridge
Abstract: For the tunnel construction, mooring is one of the most important procedures before the tunnel immersion. For the cross-sea project, the effects of swell, current and wind seas on the mooring system must be investigated in detail. This is achieved by using an approach of combined scale model tests and numerical simulations. Model tests for tunnel mooring were carried out in a towing basin. The...
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Case study of the deterioration factors of pyroclastic rock and the measurement results of the time dependence...
Abstract: The tunnel deformation, such as heaving or pushing out of the tunnel lining sometimes comes to occur after completion inside the tunnel that was constructed in the area of the pyroclastic rock with hydrothermal alteration. It is a big problem from the viewpoint of safe relief of the community, convenience and countermeasures cost. In this study, geological properties of deformed zone where...
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