关键词: 面板堆石坝, 渗漏检测, 加固处理设计, 白云水电站

Abstract: Baiyun hydropower dam, a 120 m high concrete face rockfill dam, had been in normal operation since impounding in 1998. But since May 2008, seepage of the dam had increased rapidly and the maximum seepage flow rate reached 1 240 L/s, which had aroused great concern about dam safety. This paper discussed some new technologies applied in the detection and treatment of seepage of Baiyun dam, such as sonar detection technology for deep seepage in dam, underwater lifting of closure gate and underwater rock plug burst. Furthermore, this paper introduced the characteristics of large scale collapse in CFRD, repair of damaged area and crack treatment of concrete face, grouting treatment for disengaging, densest grouting for loose cushion material and waterstop repairment.

Key words: concrete face rockfill dam, seepage detection, rehabilitation design, Baiyun hydropower station