摘要： 针对水下混凝土结构易产生的损伤及老化，介绍了裂缝防渗修补、冲坑和淘洞修补等几种修补加固技术及其水下施工方法和材料。这些修补技术在实际运用中均收到了良好的效果，保证了结构的可靠性。

Abstract: Aiming at the damage and aging of underwater concrete structures, the paper introduced several reinforcement techniques, such as anti-seepage treatment at cracks, scour hole rehabilitation and et al. As well, some construction methods and materials were recommended. The techniques are effective in the reliability guarantee of structures.