岩土体边坡在降雨入渗作用下的稳定性及影响因素分析

为合理评价降雨入渗对边坡稳定性的影响，选取西南地区某工程边坡建立模型，并结合区内实际降雨工况，运用GeoStudio等软件进行模型建立及参数选取，利用有限元法对考虑降雨历时、强度、主降雨类型、前期降雨的边坡稳定性进行分析。结果表明：短时强降雨在作用时间内会造成边坡稳定性短时间内剧烈下降，给边坡的安全性带来巨大威胁；降雨入渗作用对边坡安全系数有滞后的影响。再通过单因素分析法对边坡稳定性影响因素的敏感度进行对比分析，得出不同岩土层不同影响因素间的敏感性大小关系，可为实际工程中的边坡稳定性分析提供参考。

Stability of rock-soil slopes under rainfall infiltration and its influencing factors

In order to evaluate the impact of rainfall infiltration on slope stability, a project slope in southwest China is selected for the simulation. According to the actual rainfall conditions in the area, GeoStudio and other softwares are used to establish the model and select the parameters. The slope stability considering rainfall duration, intensity, main rainfall types and early rainfall is analyzed by finite element method. The results show that short-term heavy rainfall will cause the slope stability to decline sharply in a short time, which will pose a great threat to the safety of the slope; the safety coefficient of slope is affected by the lag of rainfall infiltration. Then the sensitivity of influencing factors of slope stability are compared and analyzed by single factor analysis method, and the sensitivity relationship between different influencing factors of different rock and soil layers is obtained, which is of a certain referential value for slope stability analysis in practical engineering.