Study on Mechanism of Highway Slope Failure Induced by Rainfall
Rainfall is a major cause of highway slope damage,especially in Guangdong province,where continuous heavy rainfall poses great safety risks to highway slopes. Taking a highway slope in Guangdong province as an example,this study analyzed the role of rainfall intensity and slope back-edge crack depth in inducing slope failure by using geological exploration data and finite difference software. The results showed that the second-stage slope is mostly affected by rainfall infiltration and back-edge cracks. As the rainfall intensity increases,the displacement between the top of the first-stage slope and the back-edge cracks increases most significantly. When the back-edge cracks become deeper,rainfall affects the stability of all stages of slopes. The maximum horizontal displacement of the slope is positively linearly correlated with the depth of rainfall infiltration,and approximately quadratically correlated with the depth of back-edge cracks. There is a linear negative correlation between the rainfall infiltration depth and the slope safety factor. When the back-edge cracks are shallow,they have little effect on the slope safety factor. But as the crack depth increases beyond a certain threshold,the slope safety factor will decrease significantly.
万方数据
维普
