摘要
海南洋浦大桥5#墩钻孔灌注桩直径2.2m,钻孔深度达118m,地层复杂,仅用回转钻机成孔,即耗费了材料,还延长了工期;仅用旋挖钻机成孔,又难以完成,这样用旋挖钻机和回转钻机接力合成孔,弥补了单独用一种钻机施工的不足,即节省了施工成本又缩短了工期,大大提高了施工效率。
The diameter of Hainan Yangpu bridge 5# pier bored piles is 2.2m, the drilling depth is 118m, the formation is complex, only using slewing drilling machine costs material and has also extended the time limit for the project; only using rotary drilling rig is difficult to complete, so with the two machines to make synthetic aperture, made up for the inadequacy, it saves construction cost and shortens the time limit for the project, greatly improves the construction efficiency.
出处
《价值工程》
2014年第2期129-130,共2页
Value Engineering
关键词
旋挖钻机
回转钻机
合成孔
rotary drilling rig
slewing drilling machine
synthetic aperture
