中文摘要：

基于常规极限平衡条分法的瑞典法、Bishop法以及不平衡推力传递法的条间力假定,将圆弧滑动面整体的滑动力矩与抗滑力矩之差定义为余力矩,在给定的安全系数下,利用简单有效的和声搜索算法寻求余力矩最大的滑动面作为给定安全系数下的危险滑动面,变化安全系数直至找到的危险滑动面的余力矩为零,该危险滑动面即为边坡的临界滑动面;鉴于取矩中心对计算结果的影响,对于非圆弧滑动面,采用滑面滑出端的余力替代余力矩作为控制指标,采用与圆弧滑动面下类似的寻找步骤即可得到非圆弧滑动面下的临界滑动面.通过两个典型土坡的算例分析证明了本文方法的可行性.

英文摘要：

The assumptions regarding inter-slice forces used in the common limit equilibrium methods of slice such as Sweden method,Bishop method and unbalanced thrust force transferring method are adopted to determine the sliding moment and anti-sliding moment for a given circular slip surface.The residual moment is defined as the difference between the sliding moment and the anti-sliding moment.The simple harmony search algorithm is used to locate the dangerous slip surface which has maximum residual moment under a given factor of safety and the given factor of safety is changed in order to find the critical slip surface which is the dangerous slip surface with zero residual moment.For non-circular slip surface,the residual force on the exit point of slip surface substitutes for the residual moment and by the same strategy described for circular slip surface the critical slip surface could be determined.This new method is applied in the slope stability analysis of two typical soil slopes and the comparative studies have shown that this new method is feasible and applicable to slope stability analysis.