砾石富水地层基坑桩锚支护及帷幕隔渗技术

Pile-anchor support and water-stop curtain technology for foundation excavation in gravel and water-rich ground

通过工程实例分析提出在圆砾石富水地层且周边城市环境较复杂的情况下,采用"土钉+挂网喷射混凝土""长螺旋钻孔灌注桩+预紧锚杆",再加长螺旋深搅桩止水帷幕的组合体系保证了基坑的施工安全和周边环境的稳定,且基坑止水效果满足设计及施工要求。

By analyzing the engineering case,some results were obtained.In the case of gravel and water-rich ground and surrounding environment of city,the composite technology made with ＂soil nail＋hanging net sprayed concrete＂,＂poured long screw drill piles＋prestressed anchor＂,and waterproof curtain formed by deep mixing pile can ensure the safety of construction and environment,meanwhile the water stopping require of design and construction was met.