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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