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Papers from WTC and ITA conferences have been made available as PDF documents.
ProceedingsThere are 1984 documents.
List of endorsed conferences
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WTC
World Tunnelling Congress
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Gongbei Port Tunnel Excavation Support Design and Construction
Abstract: The Gongbei Port tunnel is a critical component of the Hong Kong-Zhuhai-Macau Bridge, currently the largest ongoing construction project in China, connecanwith a series of bridges and tunnels. It is a double deck, three-lane in each direction roadway tunnel with a length of 255 m, cross-sectional area of 345 m and approximate alignment curvature of 900 m. The tunnel is buried within soft...
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3D F.E. back analyses of two NATM tunnels in weak flysch
Abstract: Two cases of tunnels driven through varying lithological sequences of weak flysch were back analyzed using the F.E. method under 3-D conditions. Several analyses were carried out in cross sections with unfavourable combinations of in situ stress field and rock mass strength. During the modelling, important factors and conditions were taken into account as the steps of progress of the tunnel...
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Optimization of geological researches for subway planning in Moscow
Abstract: The engineering-geological information for designing and building the metro tunnels is characterized by considerable randomness due to the discreteness of its procuration. This is confirmed by revelations of many native [Pashkin, 2013] and foreign [Charles, 1976] specialists. Even the detailed researches received according to the normative documents existing in the country then lead to the...
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Complex Function Method for the calculation of the stress field around tunnels due to incident S-Waves
Abstract: The increasing use of underground facilities requires, in the case of countries within seismic zones, safety provisions against motions caused by earthquakes. Generally, underground structures are less vulnerable than surface structures in case of an earthquake. In recent years, however, the enhanced awareness of seismic hazards for underground structures has prompted an increased understanding...
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Swelling Rocks Characterization: Lessons from the Andean Region
Abstract: Swelling in rocks is a behaviour that produces “time-dependent volume increase of the rock mass, leading to inward movement of the tunnel perimeter” (Barla [1], Einstein [2]). Since this behaviour can be produced by different means (mainly clay bearing rocks, joint gouge material containing swelling clay minerals and anhydrite transforming to gypsum), the typical rock mass classification...
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Numerical Models of Tunnels and Eurocode7
Abstract: In the Czech Republic, it has been common practice to design geotechnical structures using the limit states method since early 1960s. This methodology implemented in the Czech standards was clear and well-defined approach that was in general accepted and lead to safe and economic design. With the introduction of EN 1997-1 „Eurocode 7: Geotechnical design – Part 1: General rules“, the engineers...
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Towards an integrated evaluation of smoke or toxic gas dispersion based on Subway Climatology and the evacuation of...
Abstract: The first urban railway system and the world's first underground line (Metropolitan) opened on 10th January, 1883, in London to cope with population growth and increasing traffic congestion. Underground railway systems have become one of the important facilities of urban transportation however there is tremendous potential danger once a fire occurs in a subway system or a tunnel. These types of...
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Utility Plants in Underground Rock caverns in Singapore
Abstract: Singapore’s population and economy will grow in the coming decades. This growth will put more pressure on limited land, water and energy resources. As the city becomes more dense, it needs to expand its water supply, improve the water efficiency, reduce the exposure to the environment, and substantially improve the production of energy. Apart from reclaiming more land and building more...
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Design and constructive method for Aricanduva Station of Sao Paulo Metro Line 2 (Green) Extension – Brazil
Abstract: This paper presents general aspects of design and constructive method for Aricanduva Station, part of the extension of the Line 2-Green of São Paulo Subway-Brazil, connecting Vila Prudente Station, to the Northeast Zone of São Paulo, at Dutra Station. This extension will contribute to the expansion of the current system in 14.4km, with 13 new underground stations, 01 yard for parking and...
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Two tunnel types with low soft overburden under horizontal stress
Abstract: The alignment of Lot 7 of Sao Paulo’s Metro Line 5 tunnel is 5.75 km long and comprises 6 stations. The double track tunnel is constructed by means of an EPB-shield with an excavation diameter of 10.58 m. A detailed description of the project can be found in Along the alignment a turnover-structure originally named Olimpico is located. This structure is built as a cut & cover box with...
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Line Green 2 São Paulo Subway - New Stretch - Main aspects of the basic engineering design
Abstract: The new expansion of the Line 2 Green, Stretch between Vila Prudente and Dutra Station, of the São Paulo Subway, will extend this line to the northeast of the city until the neighbour county of Guarulhos, contributing to an expansion in the current system in approximately 14,5 km, with13 new underground stations (7 Conventional method and 6 Cut&Cover), 1 yard for parking and maintenance of...
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Cityringen Copenhagen: Innovative Groundwater Management
Abstract: In order to improve its infrastructure, Copenhagen is increasing the size of its existing Metro system by two-thirds through the construction of the new “Cityringen” circle line. The following report deals with the project in general and concentrates especially on its innovative groundwater management system.
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Metro tunnel with minimum overburden under a boulevard in Sofia
Abstract: The capital city of Bulgaria, Sofia, has a population of approximately 1.3 million and two metro lines, so-called Diameters, which are connected in the north. Thus you can ride both lines on one train without having to get off. The metro in Sofia is undergoing a period of development. Currently, the selection of a contractor is underway for the third underground line and the extension of...
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Operation analysis and effective inspection of Model-based Predictive Ventilation Control (MPVC)
Abstract: There are two main purposes to install the tunnel ventilation system in Japan: to preserve the environment at tunnel exits and to prevent the air pollution caused by the exhaust gas from vehicles in the tunnels. The Takao-san Tunnel and the Hachioji-jyoseki Tunnel on the Metropolitan Inter-City Expressway in Japan are located in areas whose environment should be particularly concerned, so...
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Risk Management in Immersed Tunnelling Projects
Abstract: Risk management in immersed tunnel construction works is one of the key elements which cannot be underestimated and is an essential tool to lead the immersed tunnelling works to be successful by forecasting potential hazards in a proactive manner and eliminating or mitigating impact or consequence on project itself, third parties and existing facilities influenced by a project. It is ordinarily...
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Quantitative Risk Analysis – Fallacy of the Single Number
Abstract: Risk analysis is a proven method to identify, characterize, and address potential risks and to allow development of risk management plans to reduce impacts to projects. In this way, limited resources can be best used and value added. In this paper we will illustrate the application of risk analysis with respect to one key element – the cost of these projects. Cost is critical to owners in terms...
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