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Soil Mass Deformation Induced by Shield Tunnel Construction
(1 Shanghai Geotechnical Engineering & Geology Institute Co. Ltd., Shanghai 200072; 2 Department of Geotechnical Engineering,College of Civil Engineering, Tongji University, Shanghai 200092; 3 Key Laboratory of Geotechnical and Underground Engineering,Tongji University, Ministry of Education, Shanghai 200092; 4 Shanghai Shentong Metro Co.Ltd., Shanghai 201103; 5 Shanghai Urban Construction Design & Research Institute, Shanghai 200125)
Abstract Based on the Mindlin solution in a semi-infinite elastic space, the composition of a settlement trough is studied by analyzing the influence of lateral pressure on the ground settlement trough, and a systematic sensitivity study on the influential parameters for the surface displacement of a single tube tunnel is conducted. Changes to the elastic modulus, Poisson′s ratio, the buried depth and the stress release coefficient will affect ground loss, while changes to Poisson′s ratio, the buried depth and the lateral pressure coefficient will affect the width parameters of the settlement trough. The parameters for ground loss and settlement trough width affected by tunnel construction at different stratum depths are analyzed. Compared with the horizontal surface displacement, the horizontal displacement in the stratum decreases significantly due to different confinement conditions.
Abstract：
Based on the Mindlin solution in a semi-infinite elastic space, the composition of a settlement trough is studied by analyzing the influence of lateral pressure on the ground settlement trough, and a systematic sensitivity study on the influential parameters for the surface displacement of a single tube tunnel is conducted. Changes to the elastic modulus, Poisson′s ratio, the buried depth and the stress release coefficient will affect ground loss, while changes to Poisson′s ratio, the buried depth and the lateral pressure coefficient will affect the width parameters of the settlement trough. The parameters for ground loss and settlement trough width affected by tunnel construction at different stratum depths are analyzed. Compared with the horizontal surface displacement, the horizontal displacement in the stratum decreases significantly due to different confinement conditions.
2017, Vol. 54 