Abstract: Hushan reservoir dam is a sand dam with clay core wall located on gravel sand foundation. Over the past 50 years of operation, concentrated seepage was observed downstream of the riverbed section of the dam, which was caused by seepage in the dam foundation. Based on the engineering geology and hydrogeological conditions of dam foundation, finite element and flow network were used to analyze the seepage of the dam foundation and the clay covering. As well, the seepage stability of dam foundation was analyzed. Then the concrete anti-seepage wall scheme and the high-pressure jet grouting scheme were compared for seepage prevention of dam foundation. The results showed that the use of concrete anti-seepage wall to treat dam foundation was suitable, worth reference.

Key words: dam foundation, geological condition, seepage analysis, finite element analysis, seepage , prevention scheme

摘要： 虎山水库大坝为黏土心墙砂壳坝，位于砾砂地基上。大坝运行50多年来，大坝河槽段下游出现集中渗流，这是坝基渗流引起的。在阐述坝基工程地质、水文地质条件的基础上，采用有限元、流网进行坝基渗流分析和坝基黏土铺盖渗流分析，分析了坝基的渗透稳定性，并比选坝基防渗的混凝土防渗墙和高压喷射灌浆方案，结果表明采用混凝土防渗墙处理坝基是适宜的，为今后同类工程的分析与处理提供借鉴。

关键词: 坝基, 地质条件, 渗流分析, 有限元, 防渗方案