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膨胀土斜坡地基上进行路堤填筑时,由于膨胀土层遇水后强度极度降低,极易形成软弱夹层,造成路堤沿坡体倾斜方向整体滑动甚至垮塌。采用有限元极限分析方法对一般斜坡地基上路堤和易于产生软弱夹层的膨胀土斜坡地基路堤进行稳定性分析。结果表明:采用有限元强度折减法,不需任何假设,即能得出路堤的稳定安全系数和滑动面,是进行膨胀土斜坡地基上路堤稳定性评价的有效方法,适于在复杂地质条件下路堤稳定性分析中推广应用。
When the expansive soil is embankment filled on the slope foundation, the weak interlayer will be formed easily because of the extreme decrease of the strength of the expansive soil after encountering water, resulting in the whole embankment sliding or even collapsing along the inclination of the slope. The finite element method is used to analyze the stability of embankments on expansive soils with embankments on ordinary slopes and weak intercalations. The results show that using the strength reduction method of finite element method, without any hypothesis, the stability safety coefficient and sliding surface of embankment can be obtained. It is an effective method to evaluate the stability of embankment on expansive soil slopes. It is suitable for under complex geological conditions Popularization and Application of Embankment Stability Analysis.