董封水库渗漏原因分析及防渗措施

The Analysis of Seepage And Anti-seepage Measure of Dongfeng Reservoir

库区断裂构造和岩溶发育是董封水库渗漏的主要原因,而库区775m高程以上第四系砂卵石层中的细小颗粒在地下水位交替作用下被带走,又成为库区水渗漏的另一个通道。水库防渗措施应是有针对性的,对破碎带和溶洞可采用混凝土封堵的措施处理,对砂卵石渗漏区可采用铺设塑料薄膜的措施处理。

The fracture geologic structure and karst formation in reservoir region are the main causes of seepage in Dongfeng Reservoir.The fine grains,in Quaternary sand and gravel formation above the elevation of 775m,are taken away by groundwater flow,and many seepage accesses are formed.The relative anti-seepage measures directing against the situation are put forward:in cracked and karst zones,concrete closure should be adopted,in the sand and gravel formation,placing plastic membrane should be adopted.