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World Tunnelling Congress
WTCThere are 1984 documents.
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Design Methods and Construction Techniques of A Urban Subway Tunnel in Karst Regions
Abstract: The running tunnel section between Yanan Road Station and Zhongshan Road Station of the Guiyang Metro Line 1 is located in the Yunyan District of Guiyang Province, China. In this bid section, construction encountered numerous challenges, including wholly or partially filled karst caves, fractured rock masses, substantial water inflow, many adjacent buildings, large numbers of municipal...
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Design and Construction related issues of Adit by DBM for Launching 9.86m diam eter Double Shield Tunnel Boring Machine
Abstract: With the success of long distance Tunnel boring carried out for Kishanganga Hydroelectric Project with complex Himalayan geology, more and more tunnels in Hydropower Project are being bored by Tunnel Boring Machine. One such Hydro Power Project is coming up in Uttarakhand, India, wherein the Head Race Tunnel (HRT) is to be bored for a distance of about 12km. The bore diameter of the HRT is...
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Damage Identification Method Based On Wavelet Energy Band In Shield Tunnel Structure
Abstract: Rail Transit System is a traffic lifeline of a city. It’s crucial for the health service of the shield tunnel structure on the safe operation of the city. The damage identification of tunnel structure (lining cracking, bolt loosening, concrete deterioration and soil erosion after lining of tunnel) is a key technology in structural health monitoring system. However, it’s very difficult to...
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Cross-passages in the TBM-tunnels of the Follobanen Project - design under high water pressures in hard rock.
Abstract: A major part of the Follobanen railway tunnel are the twin-tubes of 19 km length, excavated with TBMs almost entirely in hard gneisses. Along the segmentally lined tunnels, 80 openings are foreseen for cross-connections. Their maximum overburden is 150 m with potentially almost the same water level. The openings in the lining are 3.8 m wide and 4.55 m high.In case of high water levels, grouting...
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Construction of Road Tunnel Connecting AIIMS Hospital to JPN Apex Trauma Centre above Operational Metro Tunnels
Abstract: The work of constructing the AIIMS road tunnel over DMRC line-2 tunnels was very challenging, as this was the first time in India that any road tunnel was constructed above the operational metro tunnels with a minimum clearance of 1.6 m only. The two major challenges during the execution of work were:1. To ensure that the operational metro tunnels must not puncture during the construction of...
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Construction of extremely large-section tunnel including off-ramp structure at portal
Abstract: The Sakuma No.1 Tunnel is a road tunnel of 3,436m in length together with an evacuation tunnel, located on the border between Shizuoka and Aichi prefectures in Japan. This construction work (Urakawa Lot) consists of a -1,555meter main tunnel and a -1,575meter evacuation tunnel, which is constructed from the portal in Shizuoka prefecture. As a characteristic feature of this main tunnel, an...
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Utility Tunneling: A Solution for Managing the Urban Underground Space in China
Abstract: On a global basis, utility tunneling has been used to improve the effective management of urban underground space and to make expansion and maintenance of pipelines and cables safer, more cost effective, and easier. China is the first country to provide the leadership in establishing utility tunneling as a national priority to meet the challenges for congested underground urban conditions. The...
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Computational Modeling for Joint Rotations of Segmental Lining in Mechanized Tunneling
Abstract: Mechanized tunneling presents a widely used tunneling method that is particularly effective in soft ground conditions and in the presence of ground water. It involves various complex processes and interactions, between both the surrounding soil medium and the shield machine during the TBM advancement and between the soil and tunnel lining via grouting mortar. Tunnel lining forms the permanent...
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Complex ventilation of the Brenner Base Tunnel during construction
Abstract: The present paper documents design of ventilation and cooling during tunnel construction of the lot H41 Sillschlucht-Pfons of the -66km long Brenner Base Tunnel, between Austria and Italy. Challenging requirements result from the fact that the tunnel connects two countries with different regulations, from the extreme complexity of the construction site and from a number of interactions with...
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Combining Multiple Independent Shield Driven Tunnels: Impact of Construction Order on Surface Settlements
Abstract: Within the scope of the concept design of a new tunnel connection in Brussels (Belgium), aimed at strengthening the congested north-south railway link in the city, a novel tunnel lay-out combining multiple independent shield-driven tunnels was considered as a valid alternative for traditional tunnelling methods. By combining two or three shield tunnels, drilled consecutively at a very small...
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Characterization of Interface between Sprayed Concrete and Thin Spray-on Membrane
Abstract: Thin spray-on membrane, which is a sprayed waterproofing membrane is considered as a measure of a conventional waterproofing sheet since it can be easily sprayed on sprayed concrete or excavated rock surface. Especially, it can be utilized in a single-shell tunnel because it can transfer loads acting on a sprayed concrete layer to the other sprayed concrete layer. However, the interfacial...
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Challenges and cases of tunneling in urban scenario
Abstract: This paper discusses about the various challenges came across the construction of Tunneling in varying geological conditions and in Urban environment for phase III of Delhi Metro Rail Corporation . Specifically the cases are enumerated from the DMRC package CC27 executed by a Joint venture group and Author was part of this execution group . This package contains 10 km of tunneling and is part...
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Case Study on Metro Tunnel below the river Ganges in Kolkata, India
Abstract: The Ganges is considered as one of the most influential rivers in Indian peninsular and some great Indian cities are historically built in its bank. In line with the ever growing trend of global urbanization, population in Indian cities like Kolkata on the bank of river Ganges are increasing in rapid proportion and it becomes essential to develop modern mass transportation facilities in these...
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Assessment of mutual influence of underground constructions on electromagnetic radiation emitted by fractured rock
Abstract: In course of experimental registration natural electromagnetic radiation emitted by fractured rock mass inside underground building sites of Moscow subway system some new own-development equipment (EMI-3K) was applied. EMI-3K apparatus was developed by SJC ‘Lenmetrogiprotrans’ (scientific and research department) with the aim of impulse-electromagnetic-radiation registration in frequency range...
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Assessment of drilling deviations in underground construction
Abstract: Besides gathering information of the drill/rock interaction, the drill monitoring system commonly known as MWD (Measurement While Drilling) gives measures of the collaring and, from the length and the drill angles, the theoretical end position of the blasthole. Since the trajectory of the drill is not measured, deviations are not accounted with the result that the actual spatial position of the...
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Application of Artificial Neural Network for Prediction of Surface Settlement During Shield TBM
Abstract: Surface settlement induced by shield TBM tunnel excavation in shallow soft ground can threaten the stability of adjacent structures in urban areas. Controlling the ground surface settlements occurred during tunneling is one of the key issues for tunneling engineers. Numerous researches for the prediction of surface settlement have been attempted along with analytical, empirical and/or numerical...
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