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南水北调中线焦作城区段为唯一横穿城市市区高填方渠段,为保证渠道运行和焦作市人民生命财产安全,渠道采用塑性混凝土防渗墙设计以提高渠道安全度,但是防渗墙与渠道交叉建筑物和穿堤建筑物衔接部位防渗墙无法施工,容易产生渗漏通道,为此需要对衔接部位采取高喷灌浆进行防渗加固。文章通过施工工艺试验,确定了高填方渠段高喷灌浆施工工艺和参数设计,施工完成后总干渠运行情况良好,可供其他高填方渠道防渗设计与施工参考。
The Jiaozuo section of the middle route of South-to-North Water Diversion Project is the only section of high-fill canal that crosses the urban urban area. To ensure the safety of people’s lives and property in the channel operation and Jiaozuo City, the plastic concrete cutoff wall design is adopted to improve the channel safety. However, Crossing the building and pier dike building convergence point impermeable wall can not be constructed, prone to leakage passage, this need to join the site to take high-jet grouting impervious reinforcement. Through the construction technology test, the article determines the construction technology and parameter design of high jet grouting in the section of high fill canal. The operation of the main culvert is in good condition after the completion of the construction, which can be used as reference for the seepage prevention design and construction of other high fill channels.