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水能资源富集的西部地区,深切河谷高陡岸坡稳定性问题严重制约了水电建设项目的顺利进行。锦屏一级水电站的高陡边坡稳定性问题十分突出,其左岸1#危岩体边坡即为典型案例之一。1#危岩体边坡为缆机平台边坡,其稳定与否直接关系到缆机平台的顺利开挖。本文运用GEO-Slope方法对其进行了稳定性研究,结果表明,其潜在失稳范围的后缘边界为黄斑岩脉X,底边界为f_(LL2)断层。开挖后该范围块体基本处于极限平衡状态,再加上施工扰动,基本不能自稳,因此建议在开挖前采取相应的支护措施。
In the western region where water resources are abundant, the stability of the steep bank slope in the deep river valley has seriously hampered the smooth progress of hydropower construction projects. The stability of the high-steep slope of Jinping I Hydropower Station is very prominent. The No.1 # dangerous rock slope on the left bank is one of the typical cases. 1 # dangerous rock slope for the cable machine platform slope, the stability of the cable platform directly related to the smooth excavation. In this paper, the stability of GEO-Slope method is studied. The results show that the trailing edge of the range of potential instability is the xenolith ditches, and the bottom boundary is the f_ (LL2) fault. After excavation, the block in this area is basically in the state of limit equilibrium. Coupled with construction disturbance, it can not be self-stabilized basically. Therefore, it is suggested to take corresponding support measures before excavation.