高地应力区断层带隧道施工力学研究

Study on Mechanical Behavior of Tunnel Construction at Fault Zone with High Ground Stress

应用有限差分软件FLAC3D对高地应力区断层带隧道工程中施工力学性态和变形空间效应进行数值模拟,分析了隧道施工过程中作业面的空间效应,重点研究了隧道拱顶、拱脚及边墙围岩的位移、应力随施工步的变化规律,为隧道优化设计和施工提供了参考依据。

Using the finite-difference software FLAC^3D, numerical simulation of the mechanical properties of construction and the effects of deformation space in the project with the tunnel at the fault zone with high ground stress is carried out. The space effect of excavation face is analyzed. The displacement which occurs at arch top, the skewback, surrounding rocks and boundary wall and the rule of rock＇s stress changing with the procedure of construction are focused, which offers referential basis to the optimum design and construction.