泰州大桥夹江左汊桥主跨采用87.5 m+3×125 m+87.5 m的五跨连续梁桥，水中主墩基础采用-2.0 m桩径的钻孔灌注桩,最大设计桩长为94 m，采用旋挖钻机施工。文章结合泰州大桥的施工实例，阐述了旋挖钻机成孔的工艺原理，按照工艺流程，重点叙述了泥浆配置、安装钻孔、钻机钻进等工艺，并重点总结了旋挖钻机施工钻孔桩的施工特点，为今后类似工程施工提供了借鉴。

The left branch bridge of Yangtze River's branching channel in Taizhou Bridge project is a 5-span continuous beam bridge with the layout of 87.5m+3×125 m+87.5 m. The diameter of bored piles is 2.0 m, and the length is 94 m. All the piles are constructed by rotary drilling rig. Based on the construction of the bridge, the paper analyses the construction techniques of rotary drilling rig, details the drilling mud, drilling rig's installation, drilling, and summarizes the features and experience, proposing reference for similar project in the future.

李林（1981－），男，江苏扬州市人，工程师，主要从事大跨径桥梁建设