Analysis On Mode Experiment Of Large Consequent Slope's Instability

Experiences in the past have been indicated that the bedding rock slope has been the most destructive and hazardous slope. With the large number of the mountain highway and the railway construction, Bedding cutting slope's protection and reinforcement will become more and more noticeable. At present, the failure damage mode of the large consequent slope still lacks in-depth and systemic study, Projects for reinforcement scope of bedding slope remain certain lack of theoretical guidance. Therefore, analysis of damage model of the large consequent slope can provide theoretical basis for this kind of cut slope's reinforcement processing.In order to analyze the damage mode of the large consequent slope, the slope model experimental platform is designed in this paper. In the experimental platform, considering the different thick and length slope scope, a total of 10 groups model experiments have been carried out and have analyzed the model experiments in different scope long from100m to 500m, under the thickness of 5m and 10m. The result from the model analysis shows that the large consequent slope failure mode belongs to progressive multiple Slipping-tension failure. The large consequent slope is primarily multiple segmental slipping. A slipping is smaller than 10%, generally 2-3 slipping primarily. When the angle of slope is 20°～25°, and when the slope length is less than 100m, the first phase slipping length generally in less than 30% slope length, meanwhile, the first phase slipping length is generally in less than 15% slope length when the slope length is more than 100m. The use of discrete element software UDEC on simulation analysis of excavation damage scope of Badong station, simulation results confirm the model results.