Influence of shield tunnel construction history on seismic response of tunnel
JIA Rui1,2, YANG Gang1,2, ZHENG Gang1,2
1. School of Civil Engineering, Tianjin University, Tianjin 300350, China; 2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300350, China
Abstract: In order to study the influence of changes of stress states and mechanical properties of soils around the tunnel caused by shield tunnel construction on the seismic response of tunnel, the effects of stress release and soil disturbance induced by shield tunnel construction on the deformation of surrounding soil, pore pressure, segment bending moment and axial force during earthquake were analyzed by numerical simulation. The numerical simulation results showed that the greater the stress release degree was, the greater the initial shear stress of soil around the tunnel, the greater the deformation of soil around the tunnel during the earthquake was, the greater the excess pore water pressure was, and the greater the peak bending moment and axial force of the segment was; The greater the degree of soil disturbance was, the smaller the shear modulus of soil was, the softer the soil was, the greater the damping ratio was, the larger the deformation of soil around the tunnel during the earthquake was, the larger the excess pore water pressure was, and the smaller the peak bending moment and axial force of the segment was; The larger the range of soil disturbance was, the larger the deformation of soil around the tunnel was, the larger the excess pore water pressure was, and the smaller the peak bending moment and axial force of segment.
加瑞, 杨岗, 郑刚. 盾构隧道施工历史对隧道地震响应的影响[J]. 隧道与地下工程灾害防治, 2023, 5(3): 41-51.
JIA Rui, YANG Gang, ZHENG Gang. Influence of shield tunnel construction history on seismic response of tunnel. Hazard Control in Tunnelling and Underground Engineering, 2023, 5(3): 41-51.
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2023, Vol. 5 
