关键词: 坝基, 地质条件, 渗流分析, 有限元, 防渗方案

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