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某基坑工程开挖深度15.0m,地下室占地面积4260m2,大体呈正方形。场地至汉江干流水平距离不足300m,承压水水头位于地面下3.0m;基坑支护需实现挡土、止水、减压防止突涌等功效。采用钻孔灌注咬合桩+锚索+深井降水的综合支护方案,在江汉平原深厚卵砾石层地区得到了成功应用,有推广应用的价值。
Excavation depth of a foundation pit project 15.0m, basement covers an area of 4260m2, generally square. The horizontal distance from the site to the main stream of Han River is less than 300m, and the head of the pressurized water is 3.0m under the ground. The foundation pit supports the functions of retaining earth, stopping water and reducing pressure to prevent surge. The comprehensive support scheme of bored pile + anchor + deep well dewatering has been successfully applied in the deep gravel layer of Jianghan Plain and has the value of popularization and application.