Effects and correlation analysis of infiltration velocity of expansive soil cut slope

From the viewpoints of considering the two effects of initial water content and rainfall intensity, infiltration velocity characteristics of expansive soil cut slope is studied through the field test. The results show that the water can infiltrate effectively only under the condition of successive rainfall in a certain intensity. The water content variety of slope is controlled by the successive time of rainfall, but not the intensity. The erosion amount is decreased with the reduction of water content. When the rainfall intensity is small, the rainfall makes little erosion on the slope surface. The erosion amount increases with the enhancement of rainfall intensity, but the value is gradually convergent. When the slope is covered by vegetation, the permeability is strengthened, but the erosion scale is lightened greatly.