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| INFLUENCES OF EXPLOSIVE VIBRATION IN OVERLAPPING TUNNELS ON ADJACENT STRUCTURES |
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Abstract The overlapping tunnels in a subway project are considered as the study background，and the influence of explosive vibration in overlapping tunnels on adjacent structure is studied during the subway project construction. The explosive vibration loadings are obtained by analyzing acceleration of explosive vibration. The initial stresses after excavation are calculated with stress relaxation method. The rational time step and damping of vibration analysis are defined by vibration modes and frequencies that are obtained with modal analysis. On the basis of Newmark step-by-step time integration method，the dynamic response of overlapping tunnels caused by the explosive vibration is analyzed. The stresses，displacements，and weak portions in the liner are determined under vibration loadings and static loadings. The vibration parameters and attenuation values in ground are achieved，and the results can be referred to tunnel design.
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Received: 10 May 2005
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CHEN Weizhong1*, LIU Xinyu1, 2, YANG Jianping1, WANG Wei1, 2, ZANG Zhonghai3, DING Hongyuan3, ZHANG Zheyuan3, WANG Xiaogang3, SHI Zhengrong1. Development of a large-scale 3D physical model test system for underground energy storage caverns and its model experimental study[J]. , 2026, 45(6): 1615-1628. |
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