广东珠海大桥直径2m桥桩孔成孔施工实践

2m Diameter Zhuhai Bridge Bored Pile HOle Completion in Guandong Province

摘要:

在珠海大桥桥桩孔的成孔施工实践中采用了滚刀钻头、泵吸反循环工艺，施工２．０ｍ和２．２ｍ大口径桥桩孔，对施工工艺参数、水上平台作业对大口径施工机械设备的技术要求、事故处理以及滚刀钻头在软土地层中钻进的可行性等方面进行了探讨。

Abstract:

Rooer bits and pump suction reverse circulation teehnique are applied in completion of 2.0mand2.2m diameter bridge bored pile hole in construction of Zhuhai bridge paramerers technical requirements onoperating large diameter, mechanical equipment on off-shore platform,accidental remedying and feasibility of drillingwith bits in soft formations are discussed.