基于椭球滑动体假定和三维简化JANBU法的边坡稳定分析

采用一般椭球体模拟三维土坡的滑动体，利用三维简化JANBU法计算其安全系数，该法假定各个条柱底面的滑动方向在水平面上的投影相等，借此可用一个变量来表达各个底滑面的滑动方向，简便易行。此外，综合借鉴粒子群优化算法和和声算法的优点，提出了改进的粒子群算法，并利用对2个三维土坡的最危险滑动体进行了搜索，与已有结果进行了对比分析，表明方法是可行有效的。

Three-dimensional slope stability analysis based on ellipsoidal sliding body and simplified JANBU method

The ellipsoidal sliding body is described by using eleven-variable equation, the new version of simplified three-dimensional JANBU method, in which only one variable is used to represent the sliding angles along all the column bases, is presented and is adopted to calculate the safety factor related to given ellipsoidal sliding body; in the case of determining critical sliding body of soil slopes, a new optimization algorithm which takes good advantages of particle swarm optimization and harmony search is presented. Two actual slopes in three dimensions are studied using the proposed method in order to demonstrate the effectiveness and applicability of the proposed method. Comparative studies have shown that the proposed method is applicable to three-dimensional slope stability analysis.