Reliability analysis of rock slope stability

摘要

Slope engineering is usually designed under condition of without sufficient sample test data. So it is of great theoretical and practical significance to fully integrate all aspects of information collection by using statistical theory and reliability analysis to obtain engineering design parameters. Based on the measured experimental data of two faults of a slope engineering and numerous relevant results of similar projects, rock classification method was used to determine the internal friction angle of the fau back analysis method and least-squares fitting method with consideration of the residuals were used to determine the cohesion of fault. The correlation of the four failure modes of anti-slide pile was considered, and back analysis method was used to determine statistical parameters of resistance of anti-slide pile. The norm recommended coefficient transmission method was used to determine function of random variables of slope sliding, and discretization dimension reduction method was utilized to obtain reliability index of slope stability. The results show that using back analysis method to modify the parameter can decrease the uncertainty and improve the reliability of engineering design and provide a design method using reliability in small sample data; the reinforcement effect of anchor anti-slide pile on slope is remarkable.