Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Twin tunnels"”.
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Long-term behaviour of twin tunnels in London clay
The assessment of ageing tunnels requires a deeper understanding of the long-term behaviour of twin tunnels, whilst lack of permeability data limits the accuracy of long-term predictions. This thesis therefore investigates long-term twin-tunnel behaviour through finite-element parametric analyses, …
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Vibration from underground railways: considering piled foundations and twin tunnels
… such as piled foundations and neighbouring tunnels. Through the formulation of computationally efficient mathematical models, this dissertation examines the dynamic behaviour of these two particular types of structures. The effect of the dynamic behaviour of these structures on the …
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Earth pressure balance (EPB) tunneling induced settlements in the Tren Urbano Project, Rio Piedras, Puerto Rico
… Tren Urbano project involved the construction of twin tunnels (6.3m diameter) with Earth Pressure Balance machines in weathered alluvial soil. The depth of the cover over the tunnel crown varies from 13m to 10m. The twin tunnels, which connect the Rio Piedras Station and University of Puerto Rico …
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A study of interaction effects due to bored tunnels in clay
As more and more tunnels are being bored in urban environments it is essential to understand the effects that this will have on adjacent structures, for example, the state of Singapore, which has been expanding its underground transit system extensively. The effects of tunneling twin tunnels in …
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Prediction and interpretation of ground movements due to tunneling in stiff clay and impacts on adjacent structures
Construction of large diameter tunnels is frequently accomplished by closed face tunnel boring machines (TBM) using a combination of face pressure and grouting around the precast lining in order to limit ground movements and potential damage to overlying structures. This thesis analyzes monitoring …
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Monitoring and modelling the long-term performance of Dublin Port Tunnel
… long-term ageing performance of a cross passage twin tunnel section of Dublin Port Tunnel subject to various deteriorations through an integrated assessment based on innovative field monitoring (i.e., wireless sensor network) and advanced numerical modelling (i.e., finite element modelling), …
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Unmanned Aerial Vehicle (UAV) navigation and image processing techniques for underground tunnel infrastructure assessment
… Large-scale underground infrastructure comprises twin tunnel cross passages, shafts, caverns, and other complex geometries, which poses great challenges for efficient onsite inspection and even health and safety issues for workers in underground environments. Compared to conventional inspections …