苏秀婷, 陈健, 李明宇, 等. 2021. 大直径泥水盾构隧道穿越复杂环境地层变形敏感性研究[J]. 工程地质学报, 29(5): 1587-1598. doi: 10.13544/j.cnki.jeg.2021-0528.
    引用本文: 苏秀婷, 陈健, 李明宇, 等. 2021. 大直径泥水盾构隧道穿越复杂环境地层变形敏感性研究[J]. 工程地质学报, 29(5): 1587-1598. doi: 10.13544/j.cnki.jeg.2021-0528.
    Su Xiuting, Chen Jian, Li Mingyu, et al. 2021. Sensitivity analysis of deformation of large diameter mud-water shield through complex environment[J]. Journal of Engineering Geology, 29(5): 1587-1598. doi: 10.13544/j.cnki.jeg.2021-0528.
    Citation: Su Xiuting, Chen Jian, Li Mingyu, et al. 2021. Sensitivity analysis of deformation of large diameter mud-water shield through complex environment[J]. Journal of Engineering Geology, 29(5): 1587-1598. doi: 10.13544/j.cnki.jeg.2021-0528.

    大直径泥水盾构隧道穿越复杂环境地层变形敏感性研究

    SENSITIVITY ANALYSIS OF DEFORMATION OF LARGE DIAMETER MUD-WATER SHIELD THROUGH COMPLEX ENVIRONMENT

    • 摘要: 盾构隧道掘进过程中将不可避免地穿越建筑结构密集区域,尤其是当穿越的建筑结构建造时间较长、基础较为薄弱,且地层变形超过特定极限时,建筑基础容易发生不均匀沉降和上部结构的额外变形。为了明确大直径泥水盾构隧道穿越复杂环境地层变形影响因素,更好掌握地层变形规律,本文以武汉地铁8号线黄浦路站—徐家棚站越江隧道工程为依托,运用大型通用有限元软件Plaxis3D建立三维有限元模型进行施工过程模拟,分别研究了覆土厚度、开挖面支护压力、盾壳段土体损失、盾尾注浆压力对地表沉降规律的敏感程度;并将数值模拟结果与现场实测值进行对比分析,结果发现有限元计算结果与实测结果具有较好的一致性,从而验证了数值模型的有效性。本文研究将为后续大直径泥水平衡盾构参数的选取提供方法指导。

       

      Abstract: Shield tunneling can inevitably pass through areas with dense building structures. Especially when the building structure that passes through is constructed for a long time, the foundation is weak, and the stratum deformation exceeds a certain limit, the building foundation is prone to uneven settlement and superstructure the additional deformation. This paper aims to clarify the influencing factors of the formation deformation of the large-diameter muddy water shield tunnel through the complex environment, and to better grasp the law of the formation deformation. It is based on the Wuhan Rail Transit Line 8 Huangpu Road Station-Xujiapeng Station River Crossing Tunnel Project. It uses the element software Plaxis 3D and establishes a three-dimensional finite element model to simulate the construction process. It studies the thickness of the overburden, the support pressure of the excavation surface, the soil loss of the shield shell, and the sensitivity of the shield tail grouting pressure to the surface settlement law. The numerical simulation results are compared and analyzed with the measured values on site. It is found that the finite element calculation results are in good agreement with the measured results, which verifies the validity of the numerical model. The research in this paper can provide method guidance for the subsequent selection of parameters of large-diameter mud-water balance shield.

       

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