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成屏一级水电站的面板堆石坝,最大坝高74.6m,坝体及面板分两期施工,水库分期蓄水,使电站提前发电。1988年12月开始初期蓄水时,一期面板(320m高程以下)施工完毕,坝体填筑到325m高程,320高程以上的坝体上游面垫层用砂浆保护。1989年汛期遇到一场较大的洪水,5月最高库水位达到338.52m高程,水头为61m,此时坝体及垫层上升到
The panel rockfill dam of Chengping-1 hydropower station has a maximum dam height of 74.6m. The dam body and the panel are constructed in two phases. The reservoir is staged to store water so that the power station can generate electricity in advance. At the beginning of December 1988 when the water was stored, the construction of the first-stage panel (below the elevation of 320m) was completed and the dam was filled to a height of 325m. The upper pad of the dam above the 320 elevation was protected by mortar. In the flood season of 1989, a big flood was encountered. In May, the highest water level of the reservoir reached an elevation of 338.52m and the water head was 61m. At this moment, the dam body and cushion rose to