Abstract
In most studies of tunnel boring machine(TBM)tunnelling, the groundwater pressure was not considered, or was simplified and exerted on the boundary of lining structure. Meanwhile, the leakage, which mainly occurs in the segment joints, was often ignored in the relevant studies of TBM tunnelling. Additionally, the geological models in these studies were simplified to different extents, and mostly were simplified as homogenous bodies. Considering the deficiencies above, a 3D refined model of the surrounding rock of a tunnel is firstly established using NURBS-TIN-BReP hybrid data structure in this paper. Then the seepage field of the surrounding rock considering the leakage in the segment joints is simulated. Finally, the stability of TBM water diversion tunnel is studied coupled with the seepage simulation, to analyze the stress-strain conditions, the axial force and the bending moment of tunnel segment considering the leakage in the segment joints. The results illustrate that the maximum radial displacement, the minimum principal stress, the maximum principal stress and the axial force of segment lining considering the seepage effect are all larger than those disregarding the seepage effect.
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Supported by the Foundation for Innovation Research Groups of the National Natural Science Foundation of China(No. 51321065), Tianjin Research Program of Application Foundation and Advanced Technology(No. 12JCZDJC29200)and Tianjin Natural Science Foundation(No. 13JCYBJC19500).
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Zhong, D., Hu, N., Cheng, Z. et al. 3D finite element analysis of TBM water diversion tunnel segment coupled with seepage field. Trans. Tianjin Univ. 22, 35–42 (2016). https://doi.org/10.1007/s12209-016-2527-z
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DOI: https://doi.org/10.1007/s12209-016-2527-z