Comprehensive Analysis of the Stability and Design of a High Cutting Rock Slope

Abstract

To realize the harmonious unification of safety and economy when designing slopes, we used geological analysis and performed a qualitative evaluation to investigate the controlling factors affecting slope stability. The finite element strength reduction method (SRM) and traditional limit equilibrium method were used to investigate the stability safety factor of a high and steep rock cutting slope in Northern Guangdong. The results showed that the influence of the structure surface on slope stability is determined by the combination of the structure surface, shape of the structure surface, filling between structure surfaces, penetration of the structure surface, and water content and sensitivity of the structure surface, the influence of only one factor on slope stability is limited. We analyzed the slope and design it optimally, the results showed after reinforcement of the second-level slope, the slope revealed an incompletely penetrated shallow slip zone and an evident deep potential slip zone. Compared to the reinforcement that was without an anchor cable, the safety factor increased when the potential slip zone moved down. Based on the SRM and traditional limit equilibrium method, the design scheme of this slope meets the safety requirements of permanent slopes, and the excavated stone can be used for roadbed filling. Thus, the optimized design scheme can coordinate safety and economic indicators. Moreover, the application of strong engineering measures to the joint development of slope in engineering practice is conservative and unreasonable. The design of these slopes can provide a reference for slope design and construction.