三维极限平衡理论及其在块体稳定分析中的应用  

3-D limit equilibrium theory and its application in block stability analysis

作　　者：张发明[1] 陈祖煜[2] 弥宏亮[2] 

机构地区：[1]河海大学土木工程学院,南京210098 [2]中国水利水电科学研究院岩土所,北京100044

出　　处：《水文地质工程地质》2002年第4期33-35,共3页Hydrogeology & Engineering Geology

摘　　要：岩体与土体失稳的滑裂面形状大多具有三维特征 ,用二维极限平衡理论难以得到与实际相应的分析结果。通过将滑动块体离散为一系列柱体 ,对每一条柱体 ,分析作用于条柱上的作用力和力矩平衡条件 ,提出块体稳定分析的三维极限平衡分析方法。该方法不需要对滑裂面作形状的假定 ,运用迭代解法 ,可以方便地求出可能滑动块体稳定系数。应用三维极限平衡分析方法对某电站坝基深层滑动块体的稳定性进行了分析 ,得到了一些有益的结论。The sliding surface of rock or soil block usually appears three-dimensional feature, so, the 2-D limit equilibrium method is not good to analyze the block stability. Based on dispersing the block into a series of columns and analyzing the force and moment of sliding surface, the 3-D limit equilibrium analysis method of block stability was put forward. The method can be simply obtained the factor of safety without complicated three dimensional equilibrium evaluations by using iteration method. Through the application of the method in one dam project in China, the computation process of this method was explained in this paper.

关 键 词：三维极限平衡 块体 稳定分析 滑裂面 迭代解法 边坡 

分 类 号：TU457[建筑科学—岩土工程]