基于Bishop法假定的边坡临界滑动场方法及应用  

Critical slip field algorithm with Bishop method assumption and its application

作　　者：李亮[1] 杨小礼[2] 禇雪松[1] 于广明[1] 路世豹 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《中南大学学报（自然科学版）》2011年第9期2848-2852,共5页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51008167);高等学校博士学科点专项科研基金资助项目(20103721120001);山东省高等学校科技计划项目(J10LE07)

摘　　要：针对边坡临界滑动场方法一般选取剩余力作为控制指标的局限,基于简化Bishop法假定,在给定安全系数下,对圆弧滑动面和非圆弧滑动面分别选用剩余力矩(滑动力矩与抗滑力矩之差)和剩余法向力力作为控制指标,从众多的可行滑动面中选择控制指标最大的那个滑动面作为给定安全系数下的危险滑动面,不断变化安全系数直至找到控制指标最大值等于零的危险滑动面作为边坡临界滑动面,形成基于Bishop法假定的边坡临界滑动场方法。将该新方法应用于2个典型土坡的稳定性分析中,通过比较分析证明该方法与常规的Bishop法得到了一致的结果。The control index of residual force is usually adopted in the general critical slip field method,in order to extend the critical slip field in terms of control index,the control index of residual moment which is defined as the difference between the sliding moment and anti-sliding moment for the circular slip surface and residual normal force at the exit point for the non-circular are used based on the Bishop method assumption at given factor of safety.The dangerous slip surface can be located from many potential slip surfaces having maximum value of control index at given factor of safety.The given factor of safety is altered to find critical slip surface which is the dangerous slip surface with zero maximum value of control index.This critical slip field algorithm with Bishop method is used to assess the stability of two typical slopes and the comparison to general Bishop method shows that this new algorithm is feasible and valid.

关 键 词：岩土工程 边坡稳定 临界滑动场方法 BISHOP法 安全系数 

分 类 号：TU441[建筑科学—岩土工程]