| 大直径深层钻孔灌注桩拔除工艺研究 |
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| 引用本文： | 裴迅,芮大虎,吴庆红,葛执礼.大直径深层钻孔灌注桩拔除工艺研究[J].探矿工程,2015,42(1):68-71. |
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| 作者姓名： | 裴迅 芮大虎 吴庆红 葛执礼 |
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| 作者单位： | 河南理工大学土木工程学院,河南理工大学土木工程学院,中铁十六局集团轨道交通公司,中铁十六局集团轨道交通公司 |
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| 摘 要： | 结合郑州南站连接线明挖隧道（拔桩区间）拟拔桩基直径大、桩长的特点，对桩体受力特征和拔桩工艺进行了研究。通过拔桩过程中桩周土破坏模式和桩体自身的抗拉强度分析计算，选取有效的减阻方法并应用于工程实践，取得良好效果。最后总结出大直径深层钻孔灌注桩拔除工程中桩身局部扩大、桩侧摩阻力过大和断桩等问题及相应的解决方法，供今后类似工程借鉴。
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| 关 键 词： | 钻孔灌注桩 拔桩 FCEC全回转清障机 极限侧阻力 断桩 |
| 收稿时间： | 2014/7/21 0:00:00 |
| 修稿时间： | 2014/11/17 0:00:00 |
Research on Pulling-out Technology for Long Bored Pile with Large Diameter |
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| PEI Xun,RUI Da-hu,WU Qing-hong and GE Zhi-li.Research on Pulling-out Technology for Long Bored Pile with Large Diameter[J].Exploration Engineering(Drilling & Tunneling),2015,42(1):68-71. |
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| Authors: | PEI Xun RUI Da-hu WU Qing-hong and GE Zhi-li |
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| Institution: | School of Civil Engineering Henan Polytechnic University,School of Civil Engineering Henan Polytechnic University,China Railway 16 Bureau Group Beijing Metro Engineering Construction Co. Ltd.,China Railway 16 Bureau Group Beijing Metro Engineering Construction Co. Ltd. |
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| Abstract: | According to the characteristics of long and large diameter pile to be pulled out in the open-excavated tunnel (pile-puling interval) in Zhengzhou, the force on pile body and the pile-pulling technology are studied. Through the analysis and calculation on failure mode of soil around the pile and tensile strength of the pile body in pulling-out process, the effective method of resistance reduction is selected to be applied in the engineering practice, and good results are achieved. The solutions of pile body partial enlarged, too large pile lateral friction and pile broken in pile pulling-out operation are summed up, which can serve as reference for the same projects. |
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| Keywords: | bored pile pile pulling FCEC full rotary wrecker machine ultimate lateral resistance broken pile |
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