土坡稳定分析中的最危险滑裂面问题  

The Sliding-plane in Analysis of the Soil Slope Stability

作　　者：侯世伟[1] 杜修力[1] 李立云[1] 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124

出　　处：《地下空间与工程学报》2010年第3期650-654,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家科技支撑计划项目(2006BAJ06B02);北京市科技计划课题(Y060506000007022)

摘　　要：在土坡稳定分析的经典极限平衡法中,一般先假设土坡的最危险滑裂面形状,然后利用不同的搜索方法寻求最优解。作者认为,基于经典极限平衡理论的边坡滑裂面是由土条底部的直线段相连构成的任意形状滑裂面;定义土条底部的纵轴坐标或者与水平面的夹角为搜索变量,采用经验遗传-单纯形算法搜索其最优解,进行了土钉加固土质边坡的稳定性验算,与圆弧滑裂面法进行了比较分析,结果表明作者的方法合理可行。During analyzing the stability of soil slope with conventional ultimate balance method,the slope shape of sliding-plane need to be assumed firstly,then different methods are used to search the optimum solutions.In this paper,it is assumed that the shape of sliding-plane is arbitrary based on the conventional ultimate balance method,and it is formed by the end-to-end line of soil strip bottom during analyzing the stability of slope;the longitudinal coordinates of soil strip bottom or the angles between soil strip bottom and horizont are defined as search variables,and their optimum solutions are searched using the empirical genetic-simplex algorithm.Checking computations for stability analysis of soil slope with nailing is presented.It is proved that the proposed method used to determine the potential sliding surface of soil slope with nailing is reasonable and feasible compared with the arc sliding surface method.

关 键 词：边坡稳定性 滑裂面形状 经验遗传-单纯形算法 

分 类 号：TU413.62[建筑科学—岩土工程]