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膨胀土路堑滑坡机理复杂,传统边坡分析方法无法对它进行分析并得出合理解释。而有限元强度折减法可采用岩土材料的非线性弹塑性本构关系,能考虑膨胀力等因素的作用,通过计算坡体的应力与应变,合理分析土坡变形过程和潜在滑动面,并采用安全系数评价边坡稳定性,较好地解决了膨胀土边坡稳定性及滑坡处治效果分析问题。应用有限元强度折减法,分析了南友路膨胀土滑坡规律,以及柔性支挡的处治效果。
The mechanism of expansive soil cutting landslide is complex, and the traditional slope analysis method can not analyze it and draw a reasonable explanation. However, the strength reduction method of finite element method can use the nonlinear elastoplastic constitutive relation of geomaterials, and can consider the effect of expansive force and other factors. By calculating the stress and strain of slope body, the deformation process and potential slip surface of slope are reasonably analyzed. The safety factor is used to evaluate the slope stability, which can well solve the stability of the expansive soil slope and analyze the effect of landslide treatment. The finite element strength reduction method is applied to analyze the rule of expansive soil landslide in Nan You Road and the treatment effect of flexible retaining gear.