【摘要】 以广州地区某临近运营地铁区间隧道的基坑开挖为工程背景,采用数值计算方法,考虑隧道结构-土体-基坑支护结构的共同作用,建立了三维非线性计算模型。通过多工况的静动力学计算,研究了基坑与隧道不同间距、基坑不同开挖深度和开挖大小等基坑参数的变化对隧道结构变形及振动特性的影响,得出相关的研究成果,可为设计提供参考。更多还原

【Abstract】 The three-dimensional nonlinear finite element model that considering the interactions of the tunnel structure,the ground,and the excavation,were established based on an engineering of a new excavation adjacent to the metro tunnels in service in Guangzhou by the calculation models. The deformation behaviors and the vibration characteristics of metro tunnels were examined via a series of static and dynamic analyses on the effects of some key factors,e.g.,the distance between the excavation and tunnels,the excavation depth,and the excavation size in plan. The results from this study can provide practically useful references for designers when encountering the similar cases.更多还原