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雾江滑坡的稳定性直接影响大坝及泄水建筑物的运行与安全。鉴于滑坡体的安全系数与开挖台阶的高程、宽度及压脚高程等因素均相关,以雾江滑坡体典型剖面为例,采用正交试验法对削坡压脚组合治理进行优化分析。结果表明,由于高程360、390m处的台阶位于滑坡体中部主滑段地表突出部位,开挖越多,卸荷越大,对安全系数的提高有较好效果;相对削坡来说,压脚对整个滑坡体的安全系数影响更大,在不影响发电死水位和下游枢纽安全的前提下,可适当提高压脚高程。研究成果可为类似工程提供参考。
The stability of the foggy landslide directly affects the operation and safety of dams and drainage structures. In view of the fact that the safety factor of landslide is related to the elevation, width and height of the excavation step, the typical section of the foggy landslide body is taken as an example, and the orthogonal test is used to optimize the combination of the slope presser and the presser foot. The results show that as the height of 360 and 390 m is located in the prominent part of the main slip surface in the central part of the landslide, the more excavation and unloading, the better the safety factor. In relation to the slope cutting, The safety factor of the whole landslide body has a greater impact, under the premise of not affecting the power generation dead-water level and the safety of the downstream hub, can be properly increased presser foot elevation. The research results can provide reference for similar projects.