大直径超深桩旋挖钻机施工实践
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山西省第三地质工程勘察院有限公司,山西 晋中 030620

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U445.55+1

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The construction techniques of the rotary drilling rig with a large diameter ultra-deep pile
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The Third Geological Engineering Investigation Institute of Shanxi Province, Jinzhong Shanxi 030620, China

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    摘要:

    太原市真武路潇河大桥桩基工程主墩桩径2.5 m,设计孔深84 m。施工地层复杂,上部为松散粉细砂层,中间为流塑性淤泥,在施工过程中容易出现孔口塌方、孔底沉渣超标、钢筋笼安装困难等问题。针对旋挖钻机在大直径超深桩施工过程中遇到的技术难题,通过认真分析探索,总结出旋挖钻机在复杂地层施工时,对钻机选型、泥浆制备、埋设护筒、钻进成孔、钢筋笼制作安装、灌注水下混凝土等环节采取的技术措施,有效保障了工程的顺利实施,保证了施工质量,提高了施工效率。

    Abstract:

    The pile foundation project of Xiaohe Bridge on Zhenwu Road in Taiyuan City has a main pier diameter of 2.5m and a design hole depth of 84m. The strata are complex, with a loose powder fine sand lin the upper and a flow plastic silt in the middle. During the construction, problems such as hole collapse, excessive sediment at the bottom of the hole, and difficulty in installing steel reinforcement cages are prone to occur. In response to the technical difficulties encountered by rotary drilling rigs during the construction of large diameter and ultra-deep piles, through careful analysis and exploration, this paper summarized the technical measures taken by rotary drilling rigs in the selection of drilling rigs, preparation of mud, embedding of casing, borehole drilling, production and installation of steel cages, and pouring of underwater concrete during the construction of complex strata. These measures effectively ensured the smooth implementation of the project, ensured construction quality, and improved construction efficiency.

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引用本文

刘成博.大直径超深桩旋挖钻机施工实践[J].钻探工程,2023,50(S1):526-529.
liuchengbo. The construction techniques of the rotary drilling rig with a large diameter ultra-deep pile[J]. Drilling Engineering, 2023,50(S1):526-529.

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  • 收稿日期:2023-06-01
  • 最后修改日期:2023-08-15
  • 录用日期:2023-08-18
  • 在线发布日期: 2023-10-21
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