红粘土边坡降雨冲刷试验研究

Rainfall Erosion Test on Red Clay Slope

红粘土边坡冲刷破坏的研究对工程设计和水土保持有着重要意义。以红粘土边坡为研究对象,进行了室内边坡冲刷模型试验,对边坡的冲刷破坏过程进行了全程观测,同时对降雨过程中边坡土体的含水率湿润锋面、孔隙水压力、坡体位移及滑动面破坏特征进行了监测,研究结果表明:从坡顶到坡脚水流侵蚀能力呈递增趋势,坡脚处的侵蚀破坏最为严重。整个降雨过程中未见明显的滑动面,验证了降雨条件下红粘土边坡的破坏和其它土类不同。

Research on rainfall erosion of red clay slope is of great significance to engineering design and soil conservation.In this paper red clay slope was taken as research object,model test of rainfall erosion was done in laboratory,whole erosion process of the slope was observed,and the moisture in soil mass was monitored during the test.From the test result it was found the infiltration area at toe of the slope was larger than other positions,degree of erosion there also was the most serious.The paper analyzed water content,the moist frontal edge,power water pressure,slope displacement and sliding surface during the rainfall.The result was shown that the erosion capacity of water flow was increasing from top to toe of the slope,the degree of erosion at toe of the slope was the most serious.The clear sliding surface has not been taken place during the rainfall,which is not different from its clay slope.