| 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].钻探工程,1994,(2):41-41,45.. GCF-1500 Percussive-Rotary Reverse Circulation Drill Are Used for Drilling Hard Rock Pile Hole[J]. Drilling Engineering, 1994,(2):41-41,45. |
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| 林德恒 郑开华 |
| 福建省地矿局地质坑探队 |
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| 中文摘要: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。 |
| 中文关键词:基桩工程，复杂地层，冲击反循环 |
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| GCF-1500 Percussive-Rotary Reverse Circulation Drill Are Used for Drilling Hard Rock Pile Hole |
| 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. |
| keywords:foundation pile construction,complex formation,percusserive reverse-circulation, |
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