单层或多层简单土坡的圆弧滑动面的安全系数特征  

Characteristic of Safety Coefficient of Dangerous Sliding Circle Surface in Monolayer or Multilayer Simple Soil Slope

作　　者：阙金声[1] 方锐[1] 李彦利[1] 刘颖[1] 贾剑[1] 

机构地区：[1]北京国电华北电力工程有限公司,北京100120

出　　处：《电力勘测设计》2009年第4期15-18,共4页Electric Power Survey & Design

摘　　要：在土质边坡稳定性分析中,条分法是实际工程中最常用的方法之一。用条分法分析边坡稳定性,关键要解决的一个问题就是确定最危险滑动面,但在实际应用中往往存在两个问题:第一,条分数的多少存在着随意性和经验性;第二,人们搜索最危险滑动面的搜索域范围很大或者根本不包含全局最优解。所以研究条分数对于安全系数的影响以及搜索域内边坡安全系数的特征具有重要的意义。论文中采用Bishop法研究常见单层或多层简单土坡的安全系数的特征,得出对于简单土坡的研究成果,即建议条分宽度一般不超过0.5 m,最危险滑动面通过坡脚点,安全系数具有很强的规律性,可为实际工程运用提供依据,可为相关规范的修订提供参考。Methods of slices with vertical interface is one of the common use methods in the practical engineering in the stability analysis of soil slope. One key problem should be resolved is to determine the most dangerous sliding circle surface when the Methods of slices with vertical interface is used to analyze the slope stability. But there exists two problems in the practical calculation and analysis. Firstly, there is too much of unbending and experience in the selection of the number of slices. Secondly, the search band of the most dangerous sliding circle surface is quite large or the global optimum solution is not included radically. So it is provided with significant meaning to study on the influence to the coefficient of safety from the number of slices and to study on the characteristic of slope coefficient of safety in the search band. The Bishop method was applied to study the characteristic of coefficient of safety of monolayer or multilayer simple soil slope in this paper, and gained the following study achievements： the width of slices is suggested not to exceed 0.5m; the most dangerous sliding circle surface is through the base of slope; the coefficient of safety is of obvious regularity. The study achievements of this paper The study result of this paper can provide reference for practical engineering and can be consulted when correlated standards and codes need to be modified and reedited.

关 键 词：简单土坡 BISHOP法 条分数 安全系数 

分 类 号：F642[经济管理—产业经济]