Numerical analysis of expansive soil cutting slope stability in the infiltration of rainwater condition

Expansive soil slope landslide is mainly due to the infiltration of rainwater. Through the analysis of expansive soil slope engineering characteristics and failure mechanism, considering the expansive force change in the infiltration of rainwater circumstances, appropriate model was chosen. The slope stability under different water-increased conditions was analyzed while all kinds of soil property parameters and water content varied synchronously. It was found that expansive soil cutting slope stability was affected by the impact of expansive force. Expansive soil slope decreased security under the rain. It also requires expansive soil slope in the design process, not only to choose a reasonable rate of slope, but also to focus the attention on the slope protection and drainage facilities.