地下洞室群褶皱对开挖应力场的影响分析

The research on the affection of the unloading stress field of the underground caverns by a fold

利用工程地质现场编录资料,对地下洞室群区域褶皱形态进行了绘制,并采用FLAC3D数值方法通用的梁单元(Beam),对该褶皱力学性质进行了数值模拟,结果显示,该电站地下洞室群褶皱对地应力场起到了分散性作用,褶皱内部应力较低,有利于洞室的开挖稳定。

From the engineering geological logging data,the shape of the fold could be regulated.Using the FLAC3D Beam element,the fold mechanical properties were computed.Final results show that the ground stress field had been dispersed by the fold,making the inner stress of the fold to be lower,which could be considered as an advantage to the cavern excavation stability.