Abstract: It is difficult to treat crack seepage underwater. In Danjiangkou project, water-soluble polyurethane has been adopted to repair the crack on concrete dam under-deep-water, This paper briefly introduces the property of polyurethane, treatment processing of chemical grouting and change of seepage amount before and after repair.?

摘要： 水工混凝土水下裂缝渗漏处理很困难，丹江口混凝土坝深水裂缝防渗修补，采用了水溶性聚氨酯，防渗效果显著。本文简单介绍了聚氨酯性能、化灌处理过程和防渗处理前后渗漏量的变化等情况。