| 软土地区提高旋挖钻机成孔质量的措施 |
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| 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].探矿工程,2013,40(9):68-71. |
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| 作者姓名： | 王文明 |
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| 作者单位： | 上海广联建设发展有限公司 |
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| 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。
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| 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 |
| 收稿时间： | 2013/4/23 0:00:00 |
| 修稿时间： | 2013/4/23 0:00:00 |
Measures of Hole Quality Improvement of Rotating Drilling Rig in Soft Soil Area |
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| WANG Wen-ming.Measures of Hole Quality Improvement of Rotating Drilling Rig in Soft Soil Area[J].Exploration Engineering(Drilling & Tunneling),2013,40(9):68-71. |
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| Authors: | WANG Wen-ming |
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| Institution: | Shanghai Guanglian Construction Development Co., Ltd. |
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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. |
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| Keywords: | rotary drilling rig bored pile soft soil structure of drill bit air-lift reverse circulation purification of slurry |
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