埋在水库坝下的输水工程,常因地质条件不好或因混凝土质量太差,空洞裂缝较多,使管身与外界形成渗水通道。这些问题轻则使工程不能正常运用,重则危及大坝安全。以往处理时,多以挖出旧管,重新回填,另建输水管。但这样工程量大,工期长,费用多。针对我县董家口水库工期紧迫情况,对土坝与输水涵管接触面的集中渗流问题,采用粘土灌浆办法处理,取得了明显效果,有效地控制了集中渗流危害,节省了修复工程量和投资,保证了枢纽工程的安全。为小型水利水电工程类似的质量事故,提供了可行的处理经验。 Water buried in the reservoir dam project, often due to poor geological conditions or due to poor quality of concrete, empty cracks more, so that the body and the outside world to form water seepage channel. In light of these problems, the project can not be used normally and the dam safety is seriously jeopardized. In the past, when dealing with the old ones, we dug up the old ones and repacked them. However, such a large amount of construction, long duration, more costs. In view of the urgent situation of Dongjiakou Reservoir in our county, the problem of concentrated seepage at the contact surface between earth dam and water conveyance culvert is treated with clay grouting method, which has achieved remarkable results and effectively controlled the hazards of concentrated seepage and saved the amount of repair works and investment , To ensure the safety of hub project. It provides a viable treatment experience for similar quality accidents in small hydropower projects.