| 复杂岩层大直径嵌岩桩钻进技术 |
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| 引用本文： | 刘睦峰.复杂岩层大直径嵌岩桩钻进技术[J].地质与勘探,2009,45(5):621-626. |
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| 作者姓名： | 刘睦峰 |
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| 作者单位： | 中南大学地学与环境工程学院;湖南省煤田地质局; |
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| 摘 要： | 在软硬互叠产状变化大且岩层坡面偏陡的地层中进行大直径嵌岩桩基础施工是当今岩土钻掘工程界面临的主要技术难题之一。结合某桥址的工程地质特征,分析了滚刀的碎岩机理和滚刀的分布规律,采用大扭矩动力头液压钻机配组合式滚刀钻头钻进的施工工艺,改进了常规的气举反循环排渣方式,总结出回次钻进技术方法,探索出一套适应该地层的泥浆性能指标、钻压、转速和小时进尺等工艺技术参数值;研究发现泥浆对钻具的浮力影响是不能忽略的,提出了一种行之有效简易确定钻压的方法,这些技术参数和工艺方法对类似工程的施工具有一定的指导意义。
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| 关 键 词： | 复杂岩层 大直径 嵌岩桩 钻进技术 |
| 收稿时间： | 2009/5/20 0:00:00 |
| 修稿时间： | 2009/8/30 0:00:00 |
Research on Drilling Technology of Large Diameter
Rock-embedded pile in Complex Rock |
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| LIU Mu-feng.Research on Drilling Technology of Large Diameter
Rock-embedded pile in Complex Rock[J].Geology and Prospecting,2009,45(5):621-626. |
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| Authors: | LIU Mu-feng |
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| Institution: | LIU Mu-feng1,2,PENG Zhen-bin1,WANG Jian-jun1,2(1.School of Geoscience and Environmental Engineering,Central South University,Changsha 410083,2.Coal Geology Bureau of HuNan Province,Changsha 410014) |
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| Abstract: | In currently geotechnical engineering,it is facing one of the most important technical problem about drilling technology of large diameter bored-pile in alternating hard and soft rock which obliquity change large and steep.According to engineering geological characteristics of one bridge,this paper analysed mechanism of hob broken-rock and its distribution,adopt high torque hydraulic power drill and construction technology of combined drill,and improved the conventional air-lift reverse technique,has summar... |
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| Keywords: | complex rock large diameter rock-embedded pile drilling technology |
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