针对清华洞水库枢纽区存在的较严重的岩溶渗漏问题,勘察查明漏水地段,根据坝址工程地质条件,按照防渗工程量较小、避开岩溶较发育的溶洞等原则,选定暗河堵洞体的位置及防渗线路。根据枢纽区水文地质条件、岩溶发育规律以及相对隔水层的分布情况,采用上下2层廊道进行帷幕灌浆防渗处理,所形成的防渗幕体最大深度达145 m,最大宽度约558 m。灌浆施工后岩层平均透水率由施工前的13.38 Lu降至1.25 Lu,帷幕灌浆防渗效果显著,清华洞水库建成后已正常蓄水运行。%For controlling serious karst leakage of Qinghuadong Resevoir,the leakage sections were identified. According to the engineering geological conditions of the dam site, the position and seepage line of the plugging holes body were selected by adopting seepage control project with small amount of work and avoiding well developed karst caves. According to the the hub area karst development law, characteristics and hydrogeological conditions and the distribution of relatively impermeable layer, we adopted curtain grouting corridors of the upper and lower levels. The maximum depth of the formed seepage curtain is 145m, and the maximum width is 558mm. The average permeable rock rate fell from 13.38Lu to 1.25Lu, the seepage effect is remarkable, and the reservoir has been properly build operation.
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