摘要
以戴云山隧道进口为研究对象,利用弹塑性有限元程序ANSYS建立数值模型,以莫尔-库伦强度准则为屈服条件,分别采取台阶法和中隔壁法(CD法)开挖支护并进行数值模拟,得到施工过程中围岩及支护结构的位移、应力分布的变化规律。
Take the enter port of Daiyunshan tunnel as the research object,the author established numerical model using the elastic-plastic finite element program ANSYS,used the Mohr-Coulomb strength criterion as the yield condition,selected step method and CD method to excavate,support processes and take the numerical simulation,and got the variation of the surrounding rock and supporting structure displacement and stress distribution in construction process.
关键词
双线铁路隧道
开挖支护
台阶法
CD法
数值模拟
double track railway tunnel
excavation and support processes
step method
CD method
numerical simulation
