摘要
用数值分析的方法,采用Ansys10.0版有限元分析程序对洞室超挖进行三维模拟计算,分析了不同超挖位置、超挖深度、超挖数量等对洞室围岩稳定性的影响,得出了超挖部位应力集中数值解及塑性区产生的影响范围,为地下工程掘进施工和初期支护设计提供重要的参考依据。
In this paper, a 3D numerical model is developed and calculated by nonlinear FEM program. The influence of different over-break conditions （ different position, amount, depth etc ） on the stability of surrounding rocks has been analyzed. The results give an influence range of plastic zone and stress focus due to the over-break position. These data are very important references in underground excavation and initial shotcrete lining design.
出处
《地下空间与工程学报》
CSCD
2008年第3期411-414,共4页
Chinese Journal of Underground Space and Engineering
关键词
地下洞室
超挖
非线性有限元
围岩稳定性
塑性区
位移
underground cavity
over-break
no-linear FEM
stability of surrounding rocks
plastic zone
displacement.
