| GCF－1500型冲击反循环钻机在桩孔硬岩中的钻进效果 |
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| 引用本文： | 林德恒,郑开华.GCF－1500型冲击反循环钻机在桩孔硬岩中的钻进效果[J].探矿工程,1994(2):41-41,45. |
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| 作者姓名： | 林德恒 郑开华 |
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| 作者单位： | 福建省地矿局地质坑探队 |
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| 摘 要： | 该钻机在厦门钻进中风化、微风化的凝及熔岩，桩孔直径为１０００ｍｍ，最大孔深４７．５６ｍ。采用冲击反循环钻进，解决了采用回转钻进无法进尺的问题，取得了良好的效益。同时就该钻机存在的问题提出了改进建议。
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| 关 键 词： | 冲击反循环 钻机 桩孔 硬岩 桩基础 |
GCF-1500 Percussive-Rotary Reverse Circulation Drill Are Used for Drilling Hard Rock Pile Hole |
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| Lin Deheng,Zheng Kaihua.GCF-1500 Percussive-Rotary Reverse Circulation Drill Are Used for Drilling Hard Rock Pile Hole[J].Exploration Engineering(Drilling & Tunneling),1994(2):41-41,45. |
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| Authors: | Lin Deheng Zheng Kaihua |
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| Abstract: | This drill are used for drilling medium and slight-weathered tufflave in Xiamen,diameter of pile holeis 1000mm,maximum depth is 47.56m.Percussive-rotary reverse circulation drilling is used to solve the problems,which could not be solved by using rotatary drilling,meanwhile suggestions on improving this drill are put intlforth. |
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| Keywords: | foundation pile construction complex formation percusserive reverse-circulation |
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