折线型滑面边坡稳定系数计算的极限分析上限解  

Upper-bound solution of safety factor for slope with broken-line slip surface based on plasticity limit analysis

作　　者：王根龙[1] 伍法权[1] 李巨文[2] 

机构地区：[1]中国科学院工程地质力学重点实验室,北京100029 [2]中国地震局防灾技术高等专科学校,北京101601

出　　处：《水文地质工程地质》2007年第1期62-65,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(90302011)

摘　　要：从极限分析原理入手,以堆积型边坡作为对象,研究了折线型滑面边坡稳定分析计算的极限分析方法,提出了折线型滑面边坡稳定系数计算的极限分析模型,并在虚功率原理的基础上推导得到了稳定系数计算的极限分析上限解。该方法考虑了折线滑面和垂直速度间断面上的内能耗散作用,考虑了边坡自重荷载、铅直向附加荷载所做的外功率作用,能计算折线型滑面堆积体边坡的稳定性计算问题。以三峡库区三马山滑坡为工程实例进行了稳定性分析计算,并与不平衡推力法的计算结果进行了比较,对本文的方法进行了验证。Based on the theory of limit analysis, through studying on the limit analysis method to calculate slope safety factor, the model of limit analysis for slope with broken-line slip surface is proposed. Furthermore, the upperbound solution of slope safety factor is obtained according to the theory of virtual power theory. The new method considers not only the effect of the inner energy dissipation produced in the broken-line slip surface and the vertical velocity discontinuous face, but also the effect of the outer power produced by self-weight and external load. It＇ s suitable for accumulated body slope with broken-line slip surface. As a case study, the author used the new method to analyze the stability of the Sanmashan landslide in the area of the Three Gorges Reservoir. Compared with the computing result of imbalance thrust force method, the method was proved.

关 键 词：垂直分条 破坏机制 虚功率原理 强度储备 

分 类 号：P642.2[天文地球—工程地质学]