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为促进危岩体的防治和“5.12”地震后的重建工作,以青川麻柳沟危岩体为例,从地质结构、地形地貌和变形特征三方面探讨危岩体的形成机制。然后通过定性的野外调查和定量的极限平衡法分析危岩体稳定性。结果表明,麻柳沟危岩体形成于压致蠕变-拉裂作用,以倾倒式破坏为主,三个危岩体中,一个欠稳定,另两个稳定。
In order to promote the prevention and control of dangerous rock mass and the reconstruction work after the “5.12” earthquake, this paper takes the Maluoguan dangerous rock mass in Qingchuan as an example to discuss the formation mechanism of dangerous rock mass from three aspects: geological structure, topography and deformation characteristics. Then the stability of the dangerous rock body is analyzed by qualitative field investigation and quantitative limit equilibrium method. The results show that the dangerous mass of Maluogou formation is formed by the compressive creep-pull-breakage, which is dominated by dumping failure. Of the three dangerous rock masses, one is not stable and the other two are stable.