高陡边坡局部开挖支护对边坡稳定性影响分析

Influence analysis of partial excavation support of high and steep slope on slope stability

某大型水电站近坝库区一高陡边坡局部开挖有临时施工道路,为分析该施工道路开挖及附属支护对边坡稳定的影响,本文采用极限平衡理论,借助SLIDE边坡计算软件对该处边坡进行稳定性分析。通过对比该边坡布置有施工道路+锚索和未布置的情形,研究局部施工道路和锚索对该高陡边坡稳定性的影响。计算表明,局部的开挖和支护对该边坡的整体稳定性影响较小,但对工程扰动附近的潜在滑体有一定影响,锚索对局部滑体稳定有一定加强作用,但影响不太明显。

There are the temporary construction roads in the partial excavation of high and steep slope at the near dam area of some a large hydropower station. In order to analyze the influence of the excavation of the construction road and the subsidiary support on the slope stability, based on the limit equilibrium theory, the paper analyzes the stability of this slope by using the SLIDE slope calculation software. By comparing whether to lay the construction road and anchor in this slope, the paper studies the influence of the partial construction road and anchor on the stability of the high and steep slope. The calculation shows that the partial excavation and support has the smaller influence to the whole stability of this slope, but has some influence on the potential sliding mass in the construction disturb area, the anchor has certain effect on the stability of partial slip body, but the effect is not obvious.