基于有限元极限平衡法的生基坪滑坡稳定性分析  

Stability Analysis of Shengjiping Landslide Based on Finite Element Limit Equilibrium Method

作　　者：刘汉东[1] 李冬冬[1] 王忠福[1] 

机构地区：[1]华北水利水电大学资源与环境学院,河南郑州450045

出　　处：《华北水利水电大学学报（自然科学版）》2015年第3期53-57,共5页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：水利部公益性行业科研专项经费项目(201301034)

摘　　要：依据有限元法计算得出的边坡应力状态,应用极限平衡法的原理对边坡进行稳定性分析,既可考虑岩土体变形对边坡稳定性的影响,又能给出工程上易于接受的安全系数.应用有限元极限平衡法对重庆生基坪滑坡进行了稳定性分析,并将计算结果与刚体极限平衡法、强度折减法的结果进行对比.结果表明:有限元极限平衡法计算所得的安全系数比刚体极限平衡法的计算结果稍低,与Janbu法计算值的相对差值最小,为0.85%,与Spencer法计算值的相对差值最大,为6.11%;比强度折减法的计算结果稍高;有限元极限平衡法的计算结果介于刚体极限平衡法和强度折减法之间.The stress status of landslides was obtained by finite element method,and the landslide stability was analyzed by the principles of limit equilibrium method,which considered the effect of the deformation of rock and soil mass on the landslide stability,and could give the receivable safety factors for engineering. This article analyzed the stability of Shengjiping landslide in Chongqing by finite element limit equilibrium method. Meanwhile,comparing the results with the results of traditional limit equilibrium methods and strength reduction method. These are shown that the safety factors obtained by finite element limit equilibrium method is lower than that of rigid body limit equilibrium method,the relative difference value is minimum comparing with the computing results of Janbu method,and it is 0. 85%; the relative difference value is maximum comparing with the computing results of Spencer method,and it is 6. 11%;the value is higher than that of strength reduction methods; the results of finite element limit equilibrium method is between the results of rigid body limit equilibrium method and the results of strength reduction method.

关 键 词：滑坡 有限元极限平衡法 刚体极限平衡法 强度折减法 稳定性分析 安全系数 

分 类 号：P642.22[天文地球—工程地质学]