考虑参数空间变异性的不排水边坡可靠度分析  

Analysis of Influence of Spatial Variability on Undrained Slope Reliability

作　　者：潘健[1] 周森[1] 

机构地区：[1]华南理工大学土木与交通学院,广东广州510640

出　　处：《汕头大学学报（自然科学版）》2010年第3期74-80,共7页Journal of Shantou University：Natural Science Edition

摘　　要：采用验算点法和随机有限元法对不排水边坡进行可靠度分析,研究边坡坡度、安全系数和强度参数相关性对边坡可靠度的影响.数值分析结果表明,由于随机有限元法恰当地考虑了土性参数的空间变异性,因而当土体抗剪强度参数变异系数超过临界值时,边坡失效概率计算结果更为合理.The first-order reliability method and the random finite-element method were used to study the probability of failure of undrained slopes.The influences of slope inclination,factor of safety and cross correlation between strength parameters on a critical value were investigated by parametric studies.Numerical results show that random finite-element method in which spatial variability of soil properties is properly accounted for can result in reasonable estimates of the probability of failure if the coefficient of variation of the shear strength parameters exceeds a critical value,which may provide a reference for design of undrained slope.

关 键 词：边坡稳定 不排水边坡 有限元法 失效概率 

分 类 号：TU432[建筑科学—岩土工程]