输水倒虹吸混凝土结构伸缩缝渗漏处理施工技术

Treatment Technology for Expansion Joints Seepage in Water Delivering Concrete Structure with Inverted Siphons

南水北调工程某输水倒虹吸混凝土结构伸缩缝在浇筑过程中,因止水片位置偏移或止水片周边混凝土振捣不密实而出现渗水现象。通过凿槽、嵌缝、化学灌浆和重做止水片处理,封闭了渗水通道,同时又保证了伸缩缝的原有功能。

In the South-to-north Water Diversion Project, water seepage happened with the expansion joints of one inverted siphon water delivering concrete structure due to the position offset of water stop strips or uncompacted vibration of the concrete around the strips during the casting. The seepage path was closed by gouge carving, caulking, chemical grouting and water stop strips rebuilt; meanwhile, by doing like this, the original functions of the expansion joints were ensured.