黄土边坡降雨入渗规律试验

Test on rainfall filtration in loess slope

为研究降雨对边坡稳定性的影响,利用人工模拟降雨装置和路堤土工模型,进行了不同初始含水量和不同降雨条件下黄土路堤边坡湿润锋和入渗率的试验,探索了黄土路堤降雨入渗过程,分析了黄土路堤边坡稳定性对降雨历时和降雨强度的敏感程度及入渗变化规律。结果表明:雨水入渗路堤土呈先快后慢的趋势,湿润锋从规则向不规则逐渐转化;入渗率与边坡初始含水量、路基压实度和降雨历时成反比关系,与降雨强度基本无关。

In order to study the slope stability in rainfall, explore the process of rainfall infiltration in loess embankment, an artificial simulation of rainfall device and embankment geotechnical model were developed. With test of wetting peak and infiltration rate at the different conditions on the loess road slope, this paper studied the sensitivity of loess slope stability to raining time and raining intensity, and the infiltration rate of the loess embankment in rainfall. The result shows that： the infiltration rate at the beginning is fast, but is slow at the end of raining, the wetting peak will change from regular to irregular; the infiltration rate is independent on raining intensity, but it has inverse relation with initial water content of slope, subgrade compaction and raining time. 1 tab, 7 figs, 10 refs.