明月山隧道台阶法动态施工数值模拟研究
Numerical Simulation of Dynamic Construction by Step Method Used in Ming Yue Shan Tunnel
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摘要: 结合明月山隧道工程地质和设计情况, 以解决上下行分离式隧道台阶法施工技术为出发点, 应用有限元软件为计算手段, 对隧道施工进行了数值模拟, 并对模拟结果进行了深入分析, 找出了隧道施工中围岩及支护结构的应力应变变化规律, 可以为工程设计的精确性分析提供合理的依据。Abstract: According to the design and geological condition of Ming Yue Shan tunnel, on the purpose of solving the key construction technique problems of the tunnel in high-speed railways the numerical simulation is conducted by using FEM software.The simulation results are analyzed to find the change law of the stress-strain of the surrounding rock and the supporting structure in the tunnel construction.It can provide basis for the accurate analysis of the engineering design.