加筋高填方路堤滑动面特性数值分析

基于强度折减法分析理论，采用有限差分软件FLAC3D对某高速公路典型高填方路堤进行建模分析，研究了高填方路堤加筋前后路堤边坡滑动面变化规律及其影响因素。分析结果表明:在高填方路堤中加入土工格栅可有效提高路堤边坡安全系数，并且边坡安全系数随着土工格栅界面参数、填土粘聚力及内摩擦角的增加而非线性增加，滑动面也随之由边坡浅层逐渐向深层发展，但随着填土粘聚力和内摩擦角的增大，土工格栅加筋效果呈逐渐减小趋势。

Numerical Analysis on Characteristics of Sliding Surface of Reinforced High Fill Embankment

Based on the strength reduction method, the typical high fill embankment along a highway was analyzed through a model established and by the finite difference software FLAC3D. The change law of the sliding surface of the embankment slope before and after reinforcement of the high fill embankment and the influencing factors were studied. The results show that the high fill embankment reinforced by geogrid has the safety factor increased effectively and, as the increase of the parameter of geogrid interface, the cohesion and the internal friction angle of the fill, the safety factor presents nonlinear increase. Accordingly, the sliding surface develops from the superficial layer to the deep layer, however, as the increase of the cohesion and the internal friction angle of the fill, the effect of geogrid reinforcement presents a tendency of gradual decrease.