Abstract：
The reinforced concrete raw water channel has large size, deep burial depth and high water flow. It is generally not allowed to carry out overhaul by cutting off the water supply, so leakage repair is of a great difficulty. Based on many repair practices, a set of effective external repair of channel with pressure are summarized, such as foundation is reinforced by grouting, water stop strip is set outside the expansion joint, cast reinforced concrete is used to reinforce the channel, to repair the channel quickly and effectively.
