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| 超厚砂卵石地层气举反循环钻探工艺 | |
| 引用本文： | 李奋强,彭振斌,王建军,杨坪.超厚砂卵石地层气举反循环钻探工艺[J].中南大学学报(自然科学版),2006,37(1):200-205. |
| 作者姓名： | 李奋强 彭振斌 王建军 杨坪 |
| 作者单位： | 1. 中南大学,地学与环境工程学院,湖南,长沙,410083;湖南基础工程公司,湖南,株洲,412003 2. 中南大学,地学与环境工程学院,湖南,长沙,410083 3. 湖南基础工程公司,湖南,株洲,412003 |
| 摘 要： | 采用气举反循环的钻探工艺，在孔径为3．0m、厚度为33m的超厚砂卵石地层桩基础施工中，改进了钻进施工工艺方法。研究结果表明：采用改进后的泥浆循环系统，提高了排渣的效率，实现了边正常钻进边排渣的工，作流程，在实际工程应用中具有可操作性；通过研究孔壁稳定与泥浆指标、孔内水头位置进行工程试验，获得的泥浆粘度比常规值低，节约了造浆成本，提高了钻探效益。此外，提出一个斯的钻杆孔内有效气量的简化计算公式。 |
| 关 键 词： | 气举反循环 超厚砂卵石层 钻探工艺 |
| 文章编号： | 1672-7207(2006)01-0200-06 |
| 收稿时间： | 2005-04-25 |
| 修稿时间： | 2005年4月25日 |
Air-lift reverse technique in super thick sandy gravel |
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| LI Fen-qiang,PENG Zhen-bin,WANG Jian-jun,YANG Ping.Air-lift reverse technique in super thick sandy gravel[J].Journal of Central South University:Science and Technology,2006,37(1):200-205. | |
| Authors: | LI Fen-qiang PENG Zhen-bin WANG Jian-jun YANG Ping |
| Institution: | 1. School of Geoscienee and Environment Engineering, Central South University, Changsha 410083, China; 2. Hunan Foundation Corporation, Zhuzhou 412003, China |
| Abstract: | Adopting air-lift reverse technique in super thick sandy gravels with thickness of 33 m and 3.0 m in pile diameter, construction technique and its drilling method were improved. It was more manipulative and more efficient in getting ride of drilling sediment in sediment-box during operation by improved general slurry-cycle system. Based on some drilling experiments for slurry parameters and stabilization of drilling-cliff, a new parameter of viscosity was acquired that is lower than required standard value and is proved to be applicable, a large amount of slurry expenses is saved, and the drilling efficiency is increased greatly. A simplified formula of effective gas quantity in drilling pole was presented. |
| Keywords: | air-lift reverse technique super thick sandy gravel drilling technique |
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