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World Tunnelling Congress
WTCThere are 1984 documents.
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The impact of shallow cover on tunnelling in soft soil
Abstract: Shield tunnelling is used widely in constructing underground infrastructure in cities due to the ability to limit settlements and damage to existing buildings. However, in an environment with soft overburden and buildings on pile foundations, the tunnel is often designed well below the pile tip level. There are two reasons for doing this: to reduce interaction between tunnelling process and...
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Statistical Evaluation of Buildings Disturbed from Metro Shield Tunnelling in Soft Soil
Abstract: Residential buildings in downtown would suffer disturbance from tunnelling, even with the help of shield machine. Tunnelling in soft soil induces subsidence of ground above metro tunnels, resulting in structural damage of buildings. In the presented study, relevance between field monitoring data of buildings and tunnelling parameters is investigated. The collected data of buildings includes...
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Tunnel lining behavior under high hydraulic head in water bearing ground – A numerical investigation
Abstract: Tunnelling under high hydraulic head in water bearing ground faces a number of technical issues during design and construction phases. This is especially true for subsea tunnelling which are highlighted by high potential for damage, high pore water pressures, and limited pre-construction accessibility (Anagnostou, 2014). As indicated by Anagnostou (2014), the face instability and the...
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Repairing an ageing national monument – the world’s first box shaped immersed tunnel
Abstract: The Maas Tunnel (Figure 1) connects the North bank and the South bank of the Maas River that divides the City of Rotterdam, the Netherlands, into two. Designed during the 1930’s after extensive studies by city engineers, construction work started in 1937 and the tunnel was opened five years later in 1942 during the occupation of Rotterdam. For the Netherlands it was the first immersed tunnel,...
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Modeling and optimization of ground freezing in tunneling
Abstract: In geotechnical applications of the artificial ground freezing (AGF) technique, safe and economic design and execution of the method require a reliable prediction of the coupled thermo-hydro-mechanical behaviour of soils subjected to freezing. In the context of thermo-poro-plasticity, a three-phase Finite Element model of freezing soils is presented, considering solid particles, liquid water...
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3D Seismic Response Analysis of a Metro-station with Atrium in Soft Soils
Abstract: A novel metro station, in the city of Shanghai, is firstly designed and constructed in soft soils. The station is composed of two different structure sections, i.e. a 2-storey and 3-span structure, and a large opening structure. A full 3D soil-structure FE model is established to analyze dynamic responses of the metro station subjected to different seismic input waves. Results indicate that...
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Tunnel Design for the Vienna Underground Construction Lot U1/9
Abstract: The construction lot U1/9 with “Altes Landgut” station is part of the extension of underground line U1 to the South from Reumannplatz station to Oberlaa station. The U1 will grow by 4.6 kilometres and five stations in forthcoming years. By 2017, it will be the longest underground line in Vienna (19.2 km). The Construction lot U1/9 consists of two app. 25 m and 30 m deep cut & cover shafts, two...
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Water Transmission Tunnel Rehabilitation in Thailand
Abstract: Metropolitan Waterworks Authority (MWA) intended to improve the existing transmission tunnel of various sections with the diameters varies from 2.0 m to 2.8 m and the total length of 14 km approximately, which was constructed more than 30 years. The existing water transmission tunnel mentioned above has been suffered from the leakage in the entire tunnel section due to insufficiency of water...
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TBM at the Meuse/Haute-Marne Underground Research Laboratory
Abstract: A new method for tunnel construction has been tested at the Meuse Haute Marne Underground Research Laboratory (URL) of Andra (French national radioactive waste management agency). A full face TBM could not be easily used in the URL due to the small size of the shaft and the low capacity (in size and load) of the freight elevator. In accordance with the in situ conditions, a road header under...
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Steel fiber-reinforced concrete for precast tunnel lining segments
Abstract: Precast tunnel lining segments are often subjected to critical impact and concentrated loads especially during the construction stage. The peripheral regions of segments, such as edges and corners, are usually exposed to significantly higher stresses than the interior. Under such high stress concentrations, concrete damages in the form of cracking and spalling are very likely to occur in these...
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Temporary sprayed concrete lining tunnels in farringdon crossrail station
Abstract: Crossrail is a new railway system which will provide a connection between the South-East and the South-West railway networks through the centre of London. The Crossrail route will run from Shenfield and Abbey Wood in the east through 21km of twin-bore tunnels under central London - connecting key London stations including Canary Wharf, Whitechapel, Liverpool Street, Farringdon, Tottenham Court...
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Time-dependent Analysis of Macro-synthetic FRC Sections with Bar Reinforcement
Abstract: Macro-synthetic fibre reinforcement has recently been proposed as reinforcement in several tunnels involving segmental linings internationally. However, concerns have been raised about the long-term performance of macro-synthetic fibres in respect of creep and the associated consequences for crack width development with time under sustained flexural loads. To address these concerns, a method to...
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Observations of tool wear and excavation performance in urban tunnels
Abstract: One of the most important predictions in a mechanized excavation project is the performance of the excavation Rostami et al., (1994), Bilgin & Balci, (2005). To obtain an efficient ground excavation in mechanized excavation it is important to achieve an efficient interact between cutting tools and ground. This is clearly fundamental to be able to gauge and evaluate this efficiency and the best...
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Identifying and Assessing Critical Road Infrastructure
Abstract: Improving the security of critical road infrastructure is a major task for owners and operators of tunnels and bridges in the European TEN-T Network (Trans-European Networks of Transport) (1). Up to now, there has not been a systematic procedure for identifying and assessing critical infrastructure objects and selecting appropriate protection measures. The European Commission (EC) Framework...
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Operation Technique of Mechanized Tunnelling in Mixed Ground
Abstract: These days, mechanized tunneling using TBM (Tunnel Boring Machine) has become very popular in many countries. There are numerous advantages using a TBM in contrast to a conventional tunneling technique such as NATM (New Austrian Tunneling Method). Even though a mechanized tunneling requires significantly large investment for preparing a TBM and its facilities, it is more beneficial to adopt...
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Optimum Freezing Pipe Arrangement for Subsea tunnel Cross Passage Construction
Abstract: Nowadays, linking countries and continents in the global transportation systems becomes an utmost challenge of civil engineering, which attracts a growing interest in construction of subsea tunnels. Among many parts of a subsea tunnel, cross passages connecting parallel twin tunnels, play a role to equilibrate the air pressure generated by passage of high speed trains, and as an emergence...
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