螺旋钻孔液力扩底注浆桩基础工艺

Procedures of Auger Drilled and Hydraulic Underrreamed Grouted Pile

摘要:

针对螺旋扩底桩桩较疏散的砂土层和砂卵五层中存在的问题，研制并成功地采用了螺旋钻孔液力扩底注浆成桩工艺技术。着重介绍了钻机及扩孔工具的结构形式及技术经济效果。

Abstract:

considering problems existing in auger,underreamed piles in loose sand and boulder formation,auger drilled and hydraulic underreamed grouted piling technique is developed successfully applied,Description is fo-cused on structure of drill rig and underreamer,as well as technical economical benefit.