局部安全系数法中约束对土坡稳定分析的影响  

Effect of constraints on slope stability analysis in local factor of safety method

作　　者：李亮[1] 迟世春[2] 林皋[2] 褚雪松[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]大连理工大学土木水利学院,辽宁大连116023

出　　处：《哈尔滨工业大学学报》2009年第6期155-159,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金重点资助项目(50639060)

摘　　要：为研究局部安全系数法中不同约束条件对土坡稳定分析的影响,结合两典型土坡,对局部安全系数法这一双重优化问题中的约束条件进行了分析,约束条件主要包括极大化问题中条块间法向力、剪切力、条底法向力需满足的约束以及极小化问题中可行滑动面需满足的约束条件,研究结果表明,限制条块间法向力为正,而允许条间剪切力为负条件下,局部安全系数法所得结果较为合理.The stability analysis on two typical slopes was performed by local factor of safety method in order to study the effect of constraints in the dual optimization problem on the obtained results. The constraints consist of the limits to the boundary interslice normal, shear forces, and normal forces acting on the slice base in the maximization problem as well as the limits to the potential slip surfaces in the minimization problem. The analysis indicates that rational results of local factor of safety method can be obtained when the interslice normal force is positive and the interslice shear force is negative.

关 键 词：边坡稳定 局部安全系数 极值原理 双重优化 约束条件 

分 类 号：TU441[建筑科学—岩土工程]