小净空、上软下硬地层盾构始发技术研究
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作者单位:

(1.中铁六局集团有限公司, 北京市 100071;

作者简介:

李作仁(1991—), 男, 本科, 工程师, 从事市政施工工作。

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中图分类号:

U455.43

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Research on Tunneling Technology of Shield Machine in Small Headroom, Upper-soft and Lower-hard Stratum
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    摘要:

    依托某地铁区间盾构机分体始发工艺,对盾构分体始发技术进行研究。由于该区间始发空间狭小,只能选择四次分体始发工艺展开盾构施工。工作井作为该区间盾构施工的唯一始发井,设计长度为18 m,且邻近山体,作业空间有限,场地无法满足常规盾构整体始发条件要求,需采取分体始发工艺。通过实践证明,盾构分体始发技术可以解决“小净空、上软下硬地层盾构始发”的难题,降低盾构始发条件限制,优化设计,减少征地拆迁,有利于城市轨道交通施工。通过盾构机分体始发技术,可以突破上软下硬淤泥地质和场地狭小的限制,是盾构施工技术的有益补充,对城市隧道工程盾构施工具有重要借鉴意义。

    Abstract:

    Based on the segmental tunneling technology of shield machine in a subway area, its study is carried out. The segmental tunneling technology by four times can only be selected for the shield construction because of narrow space in this area for tunneling. The design length of the shaft as the only starting shaft for the shield construction in this area is 18 m. And this shaft is near a mountainous body and its construction space is limited. The site is hard to meet the requirements of the overall tunneling condition of conventional shield. It is required to adopt the segmental tunneling technology. The practice has proved that the segmental tunneling technology of shield machine can solve the difficulties of shield tunneling in the "small headroom, upper-soft and lower-hard stratum", reduce the restrictions of shield tunneling condition, optimize the design and decrease the land acquisition, which is beneficial to construct the urban rail transit. The segmental tunneling technology of shield machine can break the restrictions of the upper-soft and lower-hard silt geology and the narrow site, is the useful supplement of shield construction technology, and has the important reference for the shield construction of urban tunnel engineering.

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历史
  • 收稿日期:2021-07-14
  • 最后修改日期:2021-08-22
  • 录用日期:2021-09-01
  • 在线发布日期: 2022-03-07
  • 出版日期: 2021-03-15
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