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一、工程概况大南山水库是一座小(一)型水库,集雨面积3.36平方公里,总库容143万米~3,正常水位105.0米,相应库容116.5万米~3,坝顶高程110米,坝底高程75米,最大坝高35米,坝顶宽6米,坝底宽208.5米.该库建于1971年12月,在施工中坝体96米高程以下是用水力充填法建筑,96.0米高程以上是人工担土填筑的.由于东西山坡土料土质不一致,东山坡为红色页岩粘性土,而西山坡(坝右端)为砾石状风化砂页岩土质,即易透水性土料.由于施工质量差,坝体大量渗水,工程长期无法正常运用.
First, the project overview Danshan Reservoir is a small (a) type of reservoir, collecting rain area of 3.36 square kilometers, the total storage capacity of 1.43 million meters to 3, the normal water level of 105.0 meters, the corresponding storage capacity of 116.5 million meters to 3, the crest elevation of 110 meters, Dam elevation of 75 meters, the maximum dam height of 35 meters, the crest width of 6 meters, 208.5 meters wide bottom of the dam. The library was built in December 1971, 96 meters below the dam in the construction of the following is filled with hydraulic construction method, 96.0 Because of the inconsistent soil quality of the east and west hill slopes, the Dongshanpo slope is a red shale cohesive soil, whereas the west slope (the right end of the dam) is a pebbly weathered sandy sand shale soil that is easily permeable to the soil Due to the poor construction quality, a lot of seepage of dam body, the project can not be used normally for a long time.