纳子峡水电站堆石坝混凝土面板止水变形处理措施

Cracks and water stop deformation analysis and treatment measures of rockfill dam concrete face in Nazixia Hydropower Station

堆石坝面板混凝土结构产生裂缝和止水变形,直接影响面板的耐久性和使用寿命,对裂缝及止水进行处理十分必要。本文介绍了纳子峡水电站堆石坝混凝土面板垂直缝、周边缝的止水,面板裂缝修补的变形、破损情况。采用涂覆型止水结构对面板垂直缝表面止水进行修复;采用SK手刮聚脲方案对面板裂缝进行柔性封闭处理。文中还详细介绍了修补方案和施工工艺。处理后止水效果良好,可供类似工程参考。

Concrete structure of rockfill dam face produces cracks and water stop deformation,which directly affect the durability and service life of the face.It is necessary to treat cracks and water stop.Concrete face vertical crack,water stop,face crack deformation analysis and detailed treatment measures in water level change area in Nazixia Hydropower Station are introduced in the paper.Coating water stop structure is adopted for repairing water stop on the vertical seam surface of the panel;SK manual scraping of polyurea is used for flexible sealing treatment on panel cracks.Repair plan and construction technology are also introduced in detail.The water stopping effect is good after treatment,which can provide reference for similar projects.