膨胀土路基边坡雨季失稳破坏机理的应力应变分析  

Analysis of surficial failure mechanism of expansive soil slopes with FEM

作　　者：秦禄生[1] 郑健龙[1] 

机构地区：[1]长沙交通学院路桥工程系,湖南长沙410076

出　　处：《中国公路学报》2001年第1期25-30,共6页China Journal of Highway and Transport

摘　　要：应用基于邓肯—张模型的有限元法 ,对膨胀土路基边坡雨季大量失稳破坏进行了分析。通过路基边坡降雨前后应力应变分布的差异对照 ,发现边坡表层土体大量吸水 ,产生较大膨胀力 ,是膨胀土路基边坡出现表层滑坍的主要原因。The analysis of surficial failure mechanism of expansive soil slopes by FEM based on DUCAN-CHANG's model is presented in this paper.It is understood that the existence of large amount of swelling pressure in the slope due to rainfall changes the expansive soil slopes' stress and strain distribution.The results explain shallow slip mechanism of expansive soil slopes after high rainfall in some way.

关 键 词：膨胀土路基边坡 失稳 有限元分析 公路 雨季 破坏机理 应力变分析 

分 类 号：U416.14[交通运输工程—道路与铁道工程] U416.167