利用交替变度量法搜索边坡临界滑动面

Searching critical slip surface by alternating variable metric method

在边坡工程中,如何准确、迅速地确定临界滑动面是治理边坡的关键问题。但传统极限平衡法存在准确性难以保证、搜索法工作量大和搜索中易陷入局部最小值陷阱等问题。提出了搜索边坡临界滑动面的交替变度量法,结合有限元强度折减法确定初始滑动面,采用均质典型算例进行分析,与常用的传统极限平衡法计算结果进行比较,验证了该方法的有效性和高效性。

In slope engineering,how to accurately and quickly determine the critical sliding surface is the key problem of the slope control. However,the traditional limit equilibrium method is difficult to guarantee the accuracy,the search method is large and easy to fall into the local minimum trap. In this paper,using the alternative variable metric method to search the critical slip surface of slope,combined with strength reduction finite element method to determine the initial sliding surface,and compared with result of traditional limit equilibrium method by an analysis of homogeneous slope example,the effectiveness and efficiency of the method are verified.