降雨对非饱和土质边坡稳定性影响的研究

降雨以液体形式入渗到土体中,净入渗量受土体性质、含水率、孔隙水压力、土体中水蒸气的消散度等因素的影响。因此,降雨入渗后的瞬时渗流场难以确定。本文将土-水-气三相耦合,提出了一种确定降雨入渗后的瞬时渗流场的模型,结合工程实例分析了降雨入渗后渗流场的变化对土坡稳定性的影响。

Study on influence of precipitation on unsaturated soil slope stability

Precipitation seeps through soil in the form of liquid,the rate of net infiltration is influenced by such factors as soil mass properties,moisture content,pore water pressure and dissipation of vapor in soil mass etc.The instantaneous seepage field is difficult to determine after infiltration of precipitation into soil.In this paper,soil,water and vapor were coupled,and the module to determine instantaneous seepage field after precipitation enters the soil was proposed,in combination with project example,the effect of field change after infiltration of precipitation on soil slope stability was analyzed.