关键词: 危岩, 倾倒, 坠落, 稳定性评价, 治理工程

Abstract: This paper presents a case history of a rockfall mitigation project in Guilin City. Based on the careful study of the natural geographical conditions of the treatment area, this paper utilizes the stereographic projection analysis method as the qualitative analysis on the stability of ten potential rockfall locations. At the same time, the limit equilibrium method is selected for the quantitative evaluation and analysis on the stability of three typical rockfall hazard locations under two preset working conditions. Based on the analytical results and comparative studies, the rockfall mitigation plan with a guideline of “eliminating hidden danger + comprehensive treatment” is implemented. The results show that: (1) the three typical potential rockfall locations in the study area are basically stable; (2) the factor of safety for the toppling failure mode for W1 and W2 is 0.93 ~ 0.96 under the simulated precipitation conditions, which is very easy to lose the stability; (3) the comprehensive treatment method of “static blasting and removal + passive protective net + ecological vegetation” is adopted in the study area, which has a good feasibility as well as a good result. The research conclusions in this paper are expected to provide some references for the relevant hazard prevention and mitigation projects.

Key words: Rockfalls, Toppling Failure, Falling, Stability Evaluation, Mitigation Engineering