边坡滑动面的数值模拟分析

It is most important to decide sliding surface and safety factor when analyzing stability of slope，then it is complicated to decide sliding surface with theoretical calculation．Sliding surface is approximate surface using approximation．In particular，in complex geological conditions，it is more difficult to decide curved sliding surface. Using finite element method to process，it saves time and improves accuracy．Numerical simulation of slope be decided sliding surface which can adopt two methods：first，decide the largest tensile tress node of various soil，then fit the nodes to decide sliding surface；second，decide the largest shear tress node of various soil，then fit the nodes to decide sliding surface．By simulating，find that two sliding surfaces are approximative which consistent with the theory of slope．Numerical simulation method can more accurate to decide sliding surface of slope，and do not support sliding surface of slope．Numerical simulation has important significance of theoretical guidance to excavatr slope and to decide support forms．