| 郑西客运专线旋挖灌注桩成孔施工技术 |
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| 引用本文： | 张兴胜,孙文怀,王建秀,董金玉.郑西客运专线旋挖灌注桩成孔施工技术[J].施工技术,2009,38(9). |
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| 作者姓名： | 张兴胜 孙文怀 王建秀 董金玉 |
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| 作者单位： | 1. 同济大学地下建筑与工程系,上海,200092
2. 华北水利水电学院资源与环境学院,河南,郑州,450011 |
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| 摘 要： | 旋挖灌注桩成孔施工在郑西客运专线三门峡段第四纪Q1地层中遇到难钻进、难卸土问题,通过研究地层工程地质特性,对旋挖钻机不同斗齿刃前角对应的钻进速度进行统计分析,用最小二乘法拟合最佳钻进速度和斗齿刃前角的关系.通过确定斗齿刃前角的合理取值范围,采用单层进土口的旋挖钻斗,加大进土孔,改进钻进施工工艺等措施,克服了旋挖钻机在三门峡段第四纪Q1地层中进尺难、卸土难的问题.
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| 关 键 词： | 郑西客运专线 旋挖灌注桩 旋挖钻机 最小二乘法 斗齿刃前角 钻进速度 |
Hole Forming Technology of Rotary Bored Pile in Zhengzhou-Xi'an Passenger Dedicated Line |
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| Zhang Xingsheng,Sun Wenhuai,Wang Jianxiu,Dong Jinyu.Hole Forming Technology of Rotary Bored Pile in Zhengzhou-Xi'an Passenger Dedicated Line[J].Construction Technology,2009,38(9). |
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| Authors: | Zhang Xingsheng Sun Wenhuai Wang Jianxiu Dong Jinyu |
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| Affiliation: | 1.Department of Geotechnical Engineering;Tongji University;Shanghai 200092;China;2.Institute of Resources & Environment;North China Institute of Water Resources and Hydropower;Zhengzhou;He'nan 450011;China |
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| Abstract: | There are drilling and unloading soil difficulties in hole forming of rotary bored pile in quaternary Q_1 strata of Sanmenxia section in Zhengzhou-Xi'an passenger dedicated line.By researching on the characteristics of quaternary Q_1 strata,some relationships between bucket teeth angle and drilling speed have been discovered,and the bucket teeth angle formula under optimal drilling speed has been fitted out by least square method.So the difficulties of drilling and unloading soil have been solved by decidin... |
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| Keywords: | Zhengzhou-Xi'an passenger dedicated line rotary bored pile rotary drilling rig least square method bucket teeth angle drilling speed |
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