| 旋挖钻孔低粘降失水泥浆配制应用技术 |
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| 引用本文： | 杨明星,王丽仙.旋挖钻孔低粘降失水泥浆配制应用技术[J].探矿工程,2012,39(2):64-66. |
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| 作者姓名： | 杨明星 王丽仙 |
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| 作者单位： | 山西省第三地质工程勘察院,山西晋中030620 |
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| 摘 要： | 在厚粘土、粉土、砂层进行旋挖钻孔灌注桩施工,通常由于泥浆孔口补给、泥浆不循环的工艺缺陷,导致塌孔、埋钻、卡钻、缩径、断桩事故频繁发生。在分析低粘、降失水、加速钻渣沉淀的解决机理的前提下,提出了配制低粘度、高降失水、防絮凝的铁铬盐-LV-CMC泥浆并同步孔底补浆工艺,可不需循环泥浆清孔,保证成孔质量,提高工作效率。
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| 关 键 词： | 旋挖钻孔灌注桩 铁铬盐-LV-CMC泥浆 低粘降失水泥浆 防絮凝 孔底补浆 |
| 收稿时间： | 2011/8/6 0:00:00 |
| 修稿时间： | 2011/11/14 0:00:00 |
Application Technology of Preparation of Low Viscosity and Fluid Loss Control Mud for Rotary Drilling Borehole |
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| YANG Ming-xing and WANG Li-xian.Application Technology of Preparation of Low Viscosity and Fluid Loss Control Mud for Rotary Drilling Borehole[J].Exploration Engineering(Drilling & Tunneling),2012,39(2):64-66. |
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| Authors: | YANG Ming-xing and WANG Li-xian |
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| Institution: | (Shanxi Province No.3 Institute of Hydrogeology and Engineering Geology Investigation,Jinzhong Shanxi 030620,China) |
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| Abstract: | For rotary drilling bored grouting pile construction in thick clay,silt and sand layer,borehole collapsing,drill rod burying,drill rod sticking,diameter shrinking and pile breaking often occur because of technical defects such as mud surpplying at borehole orifice and non-recirculation.On the premise of analysis on the mechanism in which low viscosity,fluid loss reduction and speed-up cuttings precipitation were solved,the formula of FCLS LV-CMC mud with low viscosity,high-level fluid loss reduction and anti-precipitation was put forward with simultaneous mud surpplying at hole bottom;hole cleaning by circulating mud was unnecessary to improve working efficiency. |
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| Keywords: | rotary drilling bored grouting pile FCLS LV-CMC mud mud with low viscosity and fluid loss reduction anti-precipitation mud surpplying at hole bottom |
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