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某水电站炸药库工程后边坡为弱风化弱卸荷为主澄江-晋宁期花岗岩,平均开挖高度约30m,最大开挖高度约51m,长约210m,局部由于不利结构面组合发生垮塌。根据其与工程关系,把岩质边坡分为Ⅰ、Ⅱ区,其中,Ⅰ区为工程边坡,Ⅱ区为自然边坡。另外根据风化卸荷、岩体结构、节理裂隙组合以及可能失稳方式等,把Ⅰ区细分为4个亚区。通过细分评价分别提出了工程治理措施。经过治理后,边坡稳定安全。
The slope behind the explosive depot of a hydropower station is weakly weathered and weakly unloaded, mainly consisting of Chengjiang-Jinning granite. The average excavation height is about 30m and the maximum excavation height is about 51m, about 210m long. Collapse occurs locally due to unfavorable structural surface combination. According to its relationship with the project, the rock slope is divided into Ⅰ, Ⅱ area, of which Ⅰ area is the engineering slope, Ⅱ area is the natural slope. In addition, according to weathering and unloading, rock mass structure, joint and fissure combination and possible instability mode, I divides the area into four sub-areas. Through the subdivision and evaluation, the project management measures are put forward respectively. After treatment, the slope is stable and safe.