边坡稳定性分析的三维极限平衡法及应用  

GENERALIZED 3D LIMIT-EQUILIBRIUM METHOD FOR SLOPE STABILITYANALYSIS AND ITS APPLICATION

作　　者：张均锋[1] 丁桦[1] 

机构地区：[1]中国科学院力学研究所,北京100080

出　　处：《岩石力学与工程学报》2005年第3期365-370,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划(973)项目(2002CB412706);国家自然科学基金资助项目(10372104)

摘　　要：将二维Janbu条分法进行拓展,给出了一种三维极限平衡边坡稳定性分析方法。该方法对所有条块满足力与力矩平衡关系,可适用于任何形状的滑面,包括地质分层和水压力等复杂条件。该方法发展了传统条分法中只给出坡体总体稳定性系数的作法,根据滑面的几何特征,进一步分析了各条块独立的稳定性系数及各条块的潜在滑动方向。另外,该方法承袭了用二维Janbu法分析的优缺点。最后对一个实际滑坡进行了稳定性分析。A new three-dimensional slope stability analysis method is developed based on 2D Janbu's generalized procedure of slices, in which all forces acting on the discretized columns are considered and static equilibrium in three directions is satisfied. In this method, the potential sliding mass is divided into rigid columns. Each column is separately analyzed by using two types of relations, geometric relations and force and moment equilibrium formulations. By introducing force boundary conditions, the stability problem is determined statically. This method may be applied to various types of potential sliding surfaces with complicated geological boundaries and stratifications, water pressure and earthquake loading. Also the method extends traditional limit-equilibrium method that only gives one value of the safety factor for an integrated slope, and the safety factor and sliding direction for each column are analyzed according to the characteristics of its sliding surface. With this method, the potential sliding direction of each column can be obtained. As an extension of 2D Janbu's method, this method also has the advantages and disadvantages of 2D Janbu's method. Moreover, The results calculated by the method for a slope in Yunyang, Chongqing, China, are given in detail, such as the safety factors and sliding directions of columns. The results obtained by 2D Janbu's method for a longitudinal section of the slope are presented also for comparison.

关 键 词：边坡工程 三维边坡分析 稳定性分析 极限平衡 

分 类 号：TU432[建筑科学—岩土工程]