杨家洞水库位于湖南省新田县,属碳酸盐岩强岩溶发育区。由于此水库存在多处严重渗漏,为了提高水库的防洪、蓄水、灌溉等能力,特通过开展水库库盆及周边地区岩溶水文地质调查和水文地质钻探工作,并辅以连通试验,查明了杨家洞水库的渗漏类型和渗漏位置并估算了水库溢洪道垭口段的渗漏量。结果表明,水库溢洪道垭口段、溢洪道至副坝段、分隔堤至副坝段存在渗漏,主坝西侧段发生渗漏的可能性较大,溢洪道垭口段渗漏量大于114.2l/s。针对本水库渗漏情况,认为灌浆帷幕是最重要的防渗措施,另外应结合采用截水墙、堵洞、铺盖等进行防渗。 Yangjiadong Reservoir is located in Xintian County, Hunan Province, which is a carbonate rock strong karst development area. Due to the serious leakage of many reservoirs, in order to improve flood control, water storage and irrigation capacity of reservoirs, the karst hydrogeology investigation and hydrogeological drilling work in the reservoir basin and the surrounding areas were carried out, The seepage type and seepage location of Yangjiadong Reservoir were estimated and the seepage amount of Yakou section of reservoir spillway was estimated. The results show that there is leakage in the section of spillway to the auxiliary dam, the spillway to the auxiliary dam, the levees in the secondary dam, and the leakage in the west side of the main dam is more likely. The seepage of the Yankou section of the spillway is more than 114.2l / s. According to the seepage situation of this reservoir, it is considered that the grouting curtain is the most important impermeable measure. In addition, the seepage prevention wall should be used in combination with the cut-off wall, blocking holes and bedding cover.