| 软土地区提高旋挖钻机成孔质量的措施 |
| 投稿时间：2013-04-23 修订日期：2013-04-23 点此下载全文 |
| 引用本文：王文明.软土地区提高旋挖钻机成孔质量的措施[J].钻探工程,2013,40(9):68-71.WANG Wen-ming. Measures of Hole Quality Improvement of Rotating Drilling Rig in Soft Soil Area[J]. Drilling Engineering, 2013,40(9):68-71. |
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| 中文摘要: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。 |
| 中文关键词:旋挖钻机 钻孔灌注桩 软土 钻头结构 气举反循环 泥浆净化 |
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| Measures of Hole Quality Improvement of Rotating Drilling Rig in Soft Soil Area |
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| 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 lengthening, bit structure improving, drilling process optimizing, borehole cleaning by air-lift reverse circulation and slurry purifying methods, etc. were adopted with good effects. The construction experiences could be reference to the similar projects. |
| keywords:rotary drilling rig bored pile soft soil structure of drill bit air-lift reverse circulation purification of slurry |
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