Abstract: Pengshui hydropower dam is a RCC arch gravity dam. In the case of low temperature and high water level, seepage of interbedded joint at elevation 274 m behind section No.14 was observed in winter after impoundment, and disappeared in April of second year. This paper analyzed the seepage reason and proposed treatment measures. Chemical grouting for transverse joint between section No.13 and No.14 was performed at the end of 2010, and cement grouting for section No.14 was conducted in early 2013. By these methods, the seepage problem behind the section No.14 was basically solved.

Key words: grouting treatment, seepage, section No.14, Pengshui hydropower station

摘要： 彭水水电站大坝为碾压混凝土弧形重力坝。自蓄水以来，在冬季低温高水位情况下，14号坝段坝后274 m高程层间缝出现渗漏，并于第二年4月份左右消失。为此对渗漏原因进行了分析，拟定了处理措施。2010年底对13～14号坝段之间横缝进行了化学灌浆处理，2013年初对14号坝段进行了水泥灌浆处理，通过两次防渗治理，14号坝段坝后渗漏问题基本得以解决。

关键词: 灌浆处理, 渗漏, 14号坝段, 彭水水电站