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红叶二级水电站高喷防渗墙,采用阿特拉斯A66CB全液压多功能工程钻机,气动冲击器配合偏心跟管超前钻进工艺(ODEX工法)钻进成孔,解决快速、高精度钻进成孔问题;高喷采用并列三管法自下而上喷射成墙,采取特殊高喷方法,解决对巨漂石裹袱成墙问题;采用早强速凝水泥膨润土稳定浆液,防止高喷浆液被地下水稀释、携带,保证浆液对架空层和渗漏通道进行充填封堵;采用钻孔取芯、注水试验、墙体开挖等方法对高喷防渗墙质量进行综合检查。
Hongye secondary hydropower station high-jet cutoff wall, the use of Atlas A66CB hydraulic multi-purpose engineering rig, pneumatic impactor with eccentric advance with the pipe drilling technology (ODEX method) into the hole, to solve the fast, high precision drilling Into the hole; spray high-jet method using juxtaposed three bottom-up spray into the wall, to take a special high-spray method to solve the problem of the giant boulder burden wall; early strength quick-setting cement bentonite to stabilize the slurry to prevent high-jet slurry It is diluted and carried by groundwater to ensure that the slurry fills and seals the overhead layer and seepage channels. The quality of high-pressure cutoff walls is inspected comprehensively by drilling coring, water injection test and wall excavation.