旋挖钻机在大直径深孔钻孔桩中的应用

On application of rotary drilling rig in large-diameter deep-hole drilling pile

主要以南京大胜关长江大桥北引桥钻孔灌注桩施工为例进行总结,介绍了旋挖钻机在地质条件复杂的情况下对大直径、深孔钻孔桩的施工方法,主要从施工准备、钻孔、清孔等几个方面进行了论述,从而推广旋挖钻机的应用。

Taking the drilling and pouring piles of the North approach Bridge of Yangtze Bridge in Dashengguan pass of Nanjing as an example, the paper introduces the construction method of the rotary drilling rig on the large-diameter and deep-hole and drilling pile in complicated geological situations, and illustrates from the construction preparation, the drilling and the hole cleaning, so as to expand the application of the rotary drilling rig.