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为研究含水量对砂性土边坡稳定性的影响,以降雨强度、坡体密度和初始含水量为主要影响因素,设计了一组正交试验,统计了边坡破坏时坡体的含水量,给出了砂性土边坡失稳含水量的临界值,为了便于分析,选取100min时的坡体含水量作为因变量,对影响边坡稳定性的因素进行了正交敏感性分析。研究结果表明:针对45°砂性土边坡,含水率大于45%时,易发生滑坡灾害;砂性土边坡100min时的含水量与降雨强度成正比,与坡体土密度成反比,并随着初始含水量的增大而出现先减小后增加的趋势,就含水量而言,砂性土边坡稳定性最不利的因素组合为强降雨、低密度和高初始含水量。
In order to study the effect of water content on the stability of sandy soil slope, a series of orthogonal experiments were designed with rainfall intensity, slope density and initial water content as the main influencing factors. The water content of slope was calculated , The critical value of instability water content of sandy soil slope was given. In order to facilitate the analysis, the moisture content of slope body at 100 min was chosen as the dependent variable, and the orthogonal sensitivity analysis was conducted on the factors affecting the slope stability. The results show that the landslide disaster is liable to happen when the water content is more than 45% for the 45 ° sandy soil slope. The water content of the sandy soil slope 100min is proportional to the rainfall intensity and inversely proportional to the slope soil density With the increase of initial water content, the trend of decreasing firstly and then increasing is the first, and in terms of water content, the most unfavorable factor of sandy soil slope stability is combination of heavy rainfall, low density and high initial water content.