（太原市建筑安全监督管理站， 太原 030009）

［摘要］介绍了护坡桩+预应力锚杆支护体系及三轴水泥土搅拌桩在山西太原汾河阶地敏感地层中的应用。通过提高单根锚杆极限承载力减少锚杆道数，进而减小锚杆成孔造成的地层损失；采用液压双动力双套管施工工艺，有效保护孔壁，降低孔壁受冲刷的程度进而减小地层附加沉降；同时采取多重堵漏措施，确保高水位环境下帷幕体系的有效性；通过监测及时指导施工，动态调整施工参数，使敏感建筑物变形始终位于安全变形范围之内。结果证明此种基坑支护技术在灵敏地层中应用的可行性和有效性。

［关键词］汾河阶地； 预应力锚杆； 三轴水泥土搅拌桩； 搅拌桩； 灵敏性土 

中图分类号： TU44 文献标识码： A文章编号：  1002-848X(2016)S1-0765-05

Application of foundation pit support anchor in sensitive environment

 of the Fenhe river terraces of Taiyuan

Xu Xianwu

(Construction Safety Supervision and Management Station of Taiyuan， Taiyuan 030009, China)

Abstract: The pit support method with pile, prestressed anchor and three-shaft stirring pile used in sensitive soil of the Fenhe river terraces in Taiyuan, Shanxi province was introduced. The number of anchor rows was reduced by improving the ultimate capacity of single anchor to avoid soil loss, and the hydraulic dural-pipe machine was used to protect the borehole and avoid ground settlement. Meanwhile, multi plugging technologies were taken to ensure the effectiveness of  curtain wall. The construction parameters were dynamically adjusted according to monitoring results, to ensure the settlement of sensitive buildings within the safety margin. The application of this method turns out to be feasible and effective.

Keywords: Fenhe river terraces; prestressed anchor; three-shaft stirring pile; stirring pile; sensitive soil

作者简介： 徐宪武，硕士，高级工程师，副总工程师，Email:13934228600@139.com。