| 泵吸反循环成孔技术在南京长江二桥大直径深桩孔中的施工实践 |
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| 引用本文： | 卿笃华,毛龙光.泵吸反循环成孔技术在南京长江二桥大直径深桩孔中的施工实践[J].湖南地质,2000,19(3):179-184,188. |
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| 作者姓名： | 卿笃华 毛龙光 |
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| 作者单位： | 湖南省地质建设工程（集团）总公司第五分公司,湖南娄底 |
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| 摘 要： | 本文介绍了桩经１．５～２．２ｍ、孔深７０ｍ的钻孔桩施方法、施工设备、防斜技术、护孔技术，并分析了深孔实施泵吸反循环的可行性，主要技术措施，总结了成孔操作要点。
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| 关 键 词： | 泵吸反循环 大直径深桩孔 成孔 防斜 |
CONSTRUCTION PRACTICE OF PUMP BREATH COUNTERCIRCULATE HOLE-DRILLED TECHNIQUE IN THE MAJOR DIAMETER DEEP PILE HOLE OF YANGTZE BRIDGE 2, NANJING |
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| Abstract: | Hole-drilled pile's construction method, equipment, oblique-prevented and hole-protected technique about the pile diameter: 1.5~2.2 m and hole depth: 70 m are introduced in this paper, and authors analyse the feasiblity which puts in effect deep hole pump breath countercirculate technique and its main technological measure, summarize the hole-drilled operation main points. |
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| Keywords: | Pump breath countercirculate Major diameter deep pile Hole-drilled Oblique-prevented Nanjing |
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