一种边坡多滑动面搜索的新方法

A new method for searching all possible circular slips of a slope

近年来关于边坡最危险滑动面的搜索的研究方法主要集中在算法的优化方面,事实上对边坡内次级潜在滑动面的搜索也有必要,而目前相关研究并不多。本文提出一种在FLAC-3D中通过控制强度折减法中的折减系数来实现多条滑动面搜索的新方法,并通过算例来说明。同时采用Bishop法与该方法作对比分析,结果表明两者的计算结果十分接近,局部边坡安全系数误差不到1%,整体边坡安全系数误差不到4%,由此论证了该方法的合理性和可行性。

Plenty of researches have been done on the newer,simpler and faster method to find the critical slip of the slope.In the meanwhile little attention has been paid to all possible circular slips of the slope,which is extremely necessary at times.A new way with a case study is proposed to search all possible circular slips with SSR in FLAC-3D.The results in this way are quite similar to the values from the LEM method（Bishop）.Errors of local slopes are no more than 1% and the error of the global slope is less than 4%,which illustrates this mothed is effective and reasonable.