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中文摘要：
为了研究粗粒土路堤在降雨条件下的入渗过程及稳定性,提出一种基于饱和-非饱和渗流及非饱和抗剪强度理论的路堤边坡稳定性分析方法。利用该方法对算例边坡的降雨入渗过程及瞬态稳定性进行研究。研究结果表明：降雨将引起路堤地下水位升高,降雨停止后地下水位由于雨水出渗而降低;路堤边坡表层受降雨入渗影响,区域基质吸力丧失（甚至变为正值）,体积含水率增大,在降雨停止后都逐渐减小;在降雨过程中,路堤边坡安全系数缓慢降低,塑性区随地下水位线沿坡脚向上延伸,面积相应增大;在降雨停止后,在雨水出渗及基质吸力恢复的共同作用下,路堤边坡安全系数得到一定程度恢复。
英文摘要：
In order to study the infiltration process and stability of granular soil embankment in the condition of rainfall, a method of analyzing the slope stability of embankment was put forward, which was based on the theory of saturated-unsaturated seepage and unsaturated shear strength. The rainfall infiltration process and transient stability of an example slope were researched with this method. The results show that the groundwater level of embankment increases because of the rainfall and decreases because of the rainwater seeping out after rainfall. The regional matric suction of slope surface affected by rainfall infiltration loses（even becomes positive） and volume water content increases, and then gradually decreases after rainfall. During the rainfall, the safety factor of embankment slope gradually decreases. The plastic zone extends upward along the foot of slope with the groundwater level, and the area of plastic zone increases.With the combined actions of the recovery of regional matric suction and the rainwater seeping out after rainfall, the safety factor of embankment slope recovers to some degree.
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