赵山渡引水工程枢纽闸址区覆盖层为深厚砂砾卵石层 ,一期围堰基础防渗设计采用高喷方案 ,目前一期工程基本施工完毕 ,实践证明高压喷射注浆法在砂砾卵石层中应用是可行的 ,而且止水帷幕厚度较小就有较好的防渗能力。赵山渡引水工程引水枢纽一期围堰面积约 5万ｍ2 。高喷底板设 Zhaoshandu Diversion Project Hub gateway zone cover for the deep gravel pebble layer, a cofferdam base seepage control design using high-jet program, the current phase of the basic construction is completed, the practice proved that high-pressure jet grouting gravel layer in gravel application Feasible, and the thickness of the water stop curtain has better impermeability. Zhaoshandu Diversion Project first phase cofferdam area of ​​about 50,000 m2. High spray floor set