摘要
基于Mohr-Coulomb准则,采用FLAC3D分析了抗剪强度参数(主要是黏聚力和内摩擦角)对高填方路堤边坡安全系数及滑动面位置的影响。同时,提出了降雨条件下路堤稳定性的分析方法,并对不同折减模式下安全系数的变化规律进行了分析。结果表明:黏聚力和内摩擦角对安全系数的影响规律类似,对滑动面位置的影响规律相反;降雨入渗条件下,对抗剪强度参数的折减会使边坡滑动破坏面由路堤深层向浅层发展,折减程度越大,安全系数降低的程度越明显。
Based on the Mohr-Coulomb criterion,the effects of shear strength,such as the cohesion and internal friction angle,on the safety factor and the sliding surface of high embankment slope are analyzed using FLA3D.An evaluation method of the embankment stability subjected to rainfall infiltration is proposed.Furthermore,the variation of safety factor under different reduction patterns is summarized.The results show that the effects of cohesion and internal friction angle are similar to safety factor,but contrary on sliding surface.Under rainfall infiltration,the reduction of shear strength causes the slope sliding surface developing from deep to shallow.The larger the reduction degree is,the more significantly the safety factor decreases.
出处
《土木工程与管理学报》
2012年第4期50-54,共5页
Journal of Civil Engineering and Management
基金
山西省交通建设科技项目(11-2-17)
关键词
强度折减法
安全系数
滑动面
折减模式
降雨入渗
strength reduction
safety factor
sliding surface
reduction pattern
rainfall infiltration
