Abstract: We have studied the leakage problem of underwater transverse joints in dam operation period, and then put forward the replacement grouting method to plug sealing check slots. This paper introduces the principle, construction condition and application process of the method. Moreover, this paper also describes the characteristics and application scope of this method, as well as its application in the Three Gorges dam, which proves that the method is effective for solving the seepage problem of dam transverse joints.

Key words: replacement grouting, waterstop system, seepage, treatment

摘要： 针对大坝运行期水下横缝止水渗漏处理问题，研究提出了利用置换式灌浆法对止水检查槽进行封堵的处理方法，并系统地介绍了该方法的工作原理、施工条件和工艺过程，以及在三峡大坝中的实际应用情况，对这一方法的特点和适用范围进行了说明，为大坝横缝止水渗漏问题的解决提供了新的途径和手段。

关键词: 置换式灌浆, 止水系统, 渗漏, 处理