地下洞室群开挖的三维非线性仿真计算

3-D Nonlinear Emulation Analysis for Excavation of Underground Caves

对桐柏抽水蓄能电站地下洞室群的开挖进行了仿真计算 ,且在计算中考虑了洞室周围的断层所带来的影响。为真实模拟实际开挖情况 ,采用了三维非线性分析。在计算中采用 ANSYS程序中的死活单元功能模拟开挖过程 ,解决了用反向加载法计算时 ,在进入塑性后所引起的矛盾。对于地应力的仿真采用了分区域施加的方法 ,最大限度地反映了地应力的真实情况。最后通过对围岩的位移、应力和塑性区的分析 。

Three dimension (3 D) nonlinear emulation analysis is conducted on the under rock surrounding in the Tongbai water power station. From analysis of rock faults, a 3 D nonlinear emulation system is used to simulate the actual condition in that area. Emulation is achieved by using the DEATH function block in ANSYS programs. Evaluations are made by analyzing the displacement, stress and plasticity of the surrounding rock area.