嘉绍跨江大桥φ3.8 m钻孔灌注桩孔施工工艺

Drilling Construction Technology of φ3.8 m Bored Grouting Pile in Jiaxing-Shaoxing River-spanning Bridge

摘要:

介绍了嘉绍跨越钱塘江特大桥φ3.8 m超大直径超深桩孔施工工艺技术，主要包括钢护筒沉放、泥浆循环系统布置、钻机及钻头的选择、护壁泥浆性能及钻进工艺参数的确定以及钻孔施工过程中采取的主要技术措施等。

Abstract:

The drilling construction technology of borehole with super-large diameter of 3.8m in Jiaxing-shaoxing river-spanning bridge is introduced: steel casing sinking, mud circulation system arrangement, drill and bit selection, performance of wall protection mud and technical parameters determination and main technical measures in drilling construction process.