吴柯,张晓平,刘浩,等. 2021. 粉质黏土地层超大直径泥水盾构隧道地表变形与施工参数相关关系研究[J]. 工程地质学报,29(5):1555-1566. doi: 10.13544/j.cnki.jeg.2021-0429.
    引用本文: 吴柯,张晓平,刘浩,等. 2021. 粉质黏土地层超大直径泥水盾构隧道地表变形与施工参数相关关系研究[J]. 工程地质学报,29(5):1555-1566. doi: 10.13544/j.cnki.jeg.2021-0429.
    Wu Ke, Zhang Xiaoping, Liu Hao, et al. 2021. Correlation between surface deformation and construction parameters in silty clay ground tunneling with super large diameter slurry shield TBM [J]. Journal of Engineering Geology, 29(5): 1555-1566. doi: 10.13544/j.cnki.jeg.2021-0429.
    Citation: Wu Ke, Zhang Xiaoping, Liu Hao, et al. 2021. Correlation between surface deformation and construction parameters in silty clay ground tunneling with super large diameter slurry shield TBM [J]. Journal of Engineering Geology, 29(5): 1555-1566. doi: 10.13544/j.cnki.jeg.2021-0429.

    粉质黏土地层超大直径泥水盾构隧道地表变形与施工参数相关关系研究

    CORRELATION BETWEEN SURFACE DEFORMATION AND CONSTRUCTION PARAMETERS IN SILTY CLAY GROUND TUNNELING WITH SUPER LARGE DIAMETER SLURRY SHIELD TBM

    • 摘要: 本文以粉质黏土地层超大直径泥水盾构隧道为工程背景,分析了地表变形特征随盾构掘进参数的变化规律。并针对粉质黏土地层隧道施工监测数据进行分析,提出了超大直径泥水盾构下穿建构筑物的施工关键控制参数。研究结果表明:不同施工参数对地表变形的影响存在显著差异,注浆量相对最大,刀盘扭矩和贯入度相对次之,刀盘推力、泥水压力、注浆压力和掘进速度相对最小。注浆量对地表变形的影响随隧道埋深的变化而变化,当隧道埋深小于一倍洞径时,注浆量对地表变形影响相对较大;当隧道埋深大于一倍洞径时,注浆量对地表变形影响相对较小。刀盘推力与泥水压力、注浆压力以及水土压力之间存在较好的相关关系。当泥水压力比水土压力约大0.1 MPa,注浆压力比水土压力约大0.3MPa时,盾构下穿建构筑物造成的地表变形相对较小,盾构地质适应性得以显著优化。相关研究成果可为后续粉质黏土地层超大直径盾构隧道地表变形分析和施工参数优化等提供理论依据和技术支撑。

       

      Abstract: This paper provides the theoretical basis and technical support for related large-diameter slurry shield engineering in silty clay formations. It analyzes the ground deformation monitoring and construction parameter data of Jinan Yellow River Tunnel project. It presents the relationship between the characteristics of surface deformation and the construction parameters. It puts forward the key control construction parameters of the ultra-large diameter slurry shield tunneling passing through important structures. The research results show that under different construction parameters there are significant differences in the characteristics of ground deformation. The amount of grouting has the greatest influence on surface deformation. The cutterhead thrust,mud pressure,grouting pressure and tunneling speed are the smallest. And the influence of the grouting amount on the surface deformation varies with the buried depth of the tunnel. It has significant impact on the surface deformation when the buried depth is less than the tunnel diameter. In addition,when the muddy water pressure is about 0.1MPa bigger than the soil pressure and the grouting pressure is about 0.3MPa bigger than the soil pressure,the ground deformation of the structure area is acceptable,and the geological adaptability of the shield is significantly optimized.

       

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