Study on Development Mechanism of Soft Rock Slope Retrogressive Landslide in Water Rich Area and Anchor Cable Frame Reinforcement Technology
Soft rock are widely distributed in mountainous and hilly areas of northern Guangdong,and soft rock slopes retrogressive landslide occurs frequently during the rainy season. The key inducing factors and development process of retrogressive landslide need to be further studied to put forward targeted prevention measures. As an important means of slope reinforcement,the cooperative working mechanism of frame-anchor cable-slope system is not clear. In this paper,based on the case of an expressway 5-stage slope landslide,the position of the sliding surface was determined,and according to which a reliable finite element analysis model was established and the characteristics of retrogressive landslide from bottom to top were revealed. The cooperative working mechanism of frame-anchor cable-slope system was explored. The analysis results showed that the frame-anchor cable changed the stress state of the slope and enhanced the integrity of the reinforcement area,thus enhancing the stability of the slope. The first row and the last row of anchor cables have the most obvious retrogressive effect on the slope,which can be enhanced in practical slope reinforcement engineering projects.