软土地区提高旋挖钻机成孔质量的措施

详细信息

刊出日期: 2013-09-10

Measures of Hole Quality Improvement of Rotating Drilling Rig in Soft Soil Area

Publish Date: 10 September 2013

摘要: 针对某高架桥工程采用旋挖钻机在软土层钻进中发生的孔口坍塌、缩径、钻头打滑、孔底沉渣厚度大等情况,进行了原因分析,并采取了加长护筒、改进钻头结构、优化钻进工艺、气举反循环清孔、泥浆净化等针对性措施,取得了良好的效果,确保了工程质量,提高了施工效率,施工经验可供类似工程参考。
- 旋挖钻机 /
- 钻孔灌注桩 /
- 软土 /
- 钻头结构 /
- 气举反循环 /
- 泥浆净化
Abstract: According to the collapse, borehole diameter shrinkage, slip of drill bit, large thickness of sediment in the bottom appeared in a viaduct project in soft soil layer with rotating drilling rig, the accident causes were analyzed;and casing length-ening, bit structure improving, drilling process optimizing, borehole cleaning by air-lift reverse circulation and slurry purif-ying methods, etc.were adopted with good effects.The construction experiences could be reference to the similar projects.
- rotary drilling rig /
- bored pile /
- soft soil /
- structure of drill bit /
- air-lift reverse circulation /
- purification of slurry