安顺北椅子山危岩形成机制与防治对策研究

Study on Formation Mechanism and Prevention Countermeasures of Dangerous Rock in Beiyizi Mountain of Guizhou

以北椅子山危岩成因机制为例,通过野外调查与工程地质分析原理相结合的手段,揭示其失稳破坏机制,并在分析基础上研究相应的防治对策。研究发现,该危岩在多组节理切割的状态下,受雨水冲刷、风化卸荷的作用,稳定性极差;加之岩体破碎,溶蚀现象较为严重,很难在现有状态下保持长期稳定。基于以上分析,对堆积体采取人工清除,对大块危岩体采用主动网与被动网,以及加锚杆支护等措施予以治理。

Taking the genetic mechanism of the Beiyizi mountain as an example,reveals its instability and failure mechanism through the combination of field investigation and engineering geological analysis principle,and studies the corresponding countermeasures on the basis of its analysis.It is found that the critical rock is subjected to the action of rain erosion and weathering unloading in the state of multi group joint cutting.The stability is very poor,and the rock mass is broken and the corrosion phenomenon is more serious.It is difficult to maintain the long-term stability in the existing state.Based on the above analysis,artificial clearance of the accumulation body is taken,the active network and passive network are adopted in the large critical rock,and the measures of bolt support are used to treat it.