Abstract: In construction of Longkaikou hydropower station, after removal of downstream weir, seepage at the structural joints was encountered. Based on careful analysis on cause reasons, chemical grouting of polyurethane material at the water stop was adopted in treatment and good effect was achieved. This paper introduced the treatment process, for reference.

Key words: structural joint, seepage water, chemical grouting, construction technology

摘要： 龙开口水电站厂房施工过程中，下游围堰拆除后厂房各机组间结构缝产生漏水，经过对漏水原因的分析，采用在结构缝两道止水间灌注聚氨酯化灌材料的方法进行堵漏处理，处理效果明显。主要对该结构缝渗漏处理的过程进行了详细阐述，为类似工程处理提供了借鉴。

关键词: 结构缝, 渗漏水, 化学灌浆, 施工工艺