Abstract: The Pubugou hydropower dam is the highest core wall rockfill dam in China at present which makes the wide grading gravelly soil as the anti-seepage material of core wall dam. Its foundation lies on a deep riverbed overburden layer with the maximum depth of 78 m. Two fully enclosed concrete diaphragm walls, 1.2 m thick each, are used for seepage prevention. The paper introduces the safety monitoring of the anti-seepage wall. The result shows that the construction quality of the anti-seepage wall is excellent. As well, it is of good effect which meets the requirements in design. The success of anti-seepage project at Pubugou hydropower station witnesses the high level in construction which is worthy reference.

Key words: Pubugou hydroelectric project, high rockfill dam, impervious wall, safety monitoring

摘要： 瀑布沟心墙堆石坝是我国目前已建采用宽级配砾石土作为心墙坝防渗料的最高心墙堆石坝。堆石坝坝基为深厚河床覆盖层，最大深度达78 m。坝基覆盖层采用各厚1.2 m的全封闭式混凝土防渗墙防渗。介绍了瀑布沟大坝防渗墙安全监测的情况。监测结果表明，大坝防渗墙工程施工质量优良，性能良好，满足设计要求。瀑布沟堆石坝防渗工程的成功建设把我国防渗墙施工水平提升到了一个新的高度，对今后防渗墙设计与施工具有重大意义。

关键词: 瀑布沟水电站, 高堆石坝, 防渗墙, 安全监测