关键词: 岩土工程, 稳定性分析, 极限平衡法, 双强度折减法, 权重安全系数

Abstract: With the limit equilibrium method, the bedding rock slopes were analyzed by double strength reduction method, and the amplification ratio of reduction coefficient was proposed. According to the principle that the shear strength reduction was determined by the amplification ratio, the limit reduction coefficient was obtained when the slope reached the limit state. Taking the depth of tension crack and the depth of water filling as a single variable respectively, the influence degree of internal friction angle and cohesive force on the stability of rock slope was compared and analyzed when the slope stability changed. Finally, the weighted safety coefficient of slope was defined by limit reduction coefficient in the double strength reduction method. The results show that: the influence degree of internal friction angle and cohesive force on rock slope can be taken into account by the double strength reduction method. The double parameter reduction analysis is carried out on the bedding rock slope, and the reduction coefficient of the internal friction angle in double parameter reduction is defined as the slope safety coefficient. This result is more in line with the practical engineering, and can provide reference for the same kind of problems.

Key words: geotechnical engineering, stability analysis, limit equilibrium method, double strength reduction method, weighted safety coefficient