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高位危岩体对水电工程的施工安全和正常运营具有显著影响,尤其是规模较大且位于开挖线以外的大型危岩体,大型设备难以到达且加固难度较大,其治理方案对地质勘探提出更高要求。雅鲁藏布江上游河谷深切,边坡高陡,在街需水电站左坝肩发育一大型危岩体,约37.5万方,通过查明危岩体的赋存边界、连通状态、等效参数,采用定性和定量方法综合确定危岩体整体和局部稳定性、失稳方式,并提出了针对性的治理措施,这对巨型危岩评价思路和防治措施,具有一定指导意义。
High dangerous rock mass has a significant impact on the construction safety and normal operation of hydropower projects, especially large-scale large dangerous rock mass located outside the excavation line. Large-scale equipment is difficult to reach and harder to be hardened. Put forward higher requirements. In the upper reaches of the Brahmaputra, the valley is deep and the slope is steep and steep. A large-scale dangerous rock body is developed at the left abutment of Jiyushui Hydropower Station, with a diameter of about 375,000. By identifying the boundary, the connected state and the equivalent parameters of the dangerous rock body, Quantitative method to determine the overall and partial stability of dangerous rock mass, instability, and put forward targeted control measures, which for giant dangerous rock evaluation ideas and prevention and control measures, has some guiding significance.