结合参窝、观音阁等水库工程防渗灌浆的实践 ,论述了采用水溶性聚氨酯进行防渗堵漏灌浆方案设计中的防渗区的界定 ,灌浆孔的布设及浆液配合比选择等方面的制订原则、方法和相关技术。浆液配合比主要根据裂缝变形特征 (死缝或活缝 )和裂缝界面条件 (填塞、粘结、胀塞等不同防渗机理 )来选定 ,活缝灌浆应以Lw浆液为主 ,按胀塞机理处理裂缝 ,其适应性广、可靠性较高 Combined with the practice of anti-seepage grouting in reservoir projects such as Shenwo and Guanyinge reservoirs, the paper defines the design of impervious zone in seepage-proof plugging grouting scheme with water-soluble polyurethane, the design of grouting holes and the selection of slurry mixing ratio Principles, methods and related technologies. The slurry mix ratio is mainly selected according to the deformation characteristics of the fracture (dead seam or joint) and the fracture interface conditions (different seepage prevention mechanisms such as packing, bonding and bulging). The grouting should be mainly Lw grout, Mechanism to deal with cracks, its wide adaptability and high reliability