花岗岩残积土边坡降雨入渗试验研究

Experimental Study on Rainfall Infiltration of Granite Residual Soil Slope

研究花岗岩残积土边坡降雨入渗的规律,可指导花岗岩残积土边坡的防护设计。文章针对花岗岩残积土边坡雨水入渗规律,研究裸坡与加防护边坡雨水入渗的变化规律。试验采用两种工况进行模拟降雨入渗试验。结果表明:(1)雨水在入渗花岗岩残积土边坡时,入渗的路线大致呈“平抛物线”型,其坡内土体的含水率大致呈斜向的“L”型;(2)加客土喷播防护边坡坡体内相同含水率的连线与边坡面距离比裸坡含水率连线与边坡面距离平均靠前了 6 cm,采用客土喷播防护可以有效地减少雨水入渗。

The study on rainfall infiltration law of granite residual soil slope can guide the protection design of granite residual soil slope.Regarding the rainwater infiltration law of granite residual soil slope,this article studies the variation law of rainwater infiltration at bare slope and protective slope.The test uses two working conditions to simulate the rainfall infiltration test.The results show that:(1) When the rainwater is infiltrated into the granite residual soil slope,the infiltration route is roughly “flat parabola” type,and the water content of soil body in the slope is roughly in the oblique “L” direction;(2)The distance between the connection line and the slope surface with the same water content in protective slope with spraying borrowed soil is 6 cm higher than the distance between the connecting line of bare slope water content and the slope surface,thus the protection of borrowed soil spraying can effectively reduce the infiltration of rainwater.