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Effects of Construction Sequences and Volume Loss on Perpendicularly Crossing Tunnels

机译：施工序列和体积损失对垂直交叉隧道的影响

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摘要

The number of constructed tunnels has been gradually increasing for the past decades due to rapid development in urban areas. However, the soil-structure interaction problems arising from perpendicularly crossing tunnels attract relatively little research attention in the past. In this study, six three-dimensional finite element analyses were conducted to simulate tunnel excavation nearby a perpendicularly crossing existing tunnel, in an attempt to investigate the effects of construction sequences on cross-cutting tunnels. The hypoplastic constitutive model for sand is adopted in the numerical analysis to consider the soil small-strain stiffness. Computed results are presented and discussed in terms of ground surface settlement, displacement and deformation of the existing tunnel, and bending moment induced on the existing tunnel. The stress-transfer mechanism in soil nearby the existing tunnel due to tunnelling is also studied.
机译：由于城市地区的快速发展，过去数十年来，建造隧道数量逐渐增加。然而，垂直横穿隧道产生的土壤结构相互作用问题在过去吸引了相对较少的研究关注。在这项研究中，进行了六个三维有限元分析以模拟隧道挖掘在垂直穿过现有隧道附近的隧道开挖，试图研究施工序列对横切隧道的影响。用数值分析采用砂的砂囊组成型模型，以考虑土壤小应变刚度。在现有隧道的地面沉降，位移和变形方面提出和讨论了计算结果，并在现有隧道上引起的弯曲力矩。还研究了由于隧道引起的现有隧道附近土壤中的应力转移机制。

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  • 来源
    《Advances in civil engineering》 |2019年第16期|6017206.1-6017206.12|共12页
  • 作者

    Zang Yanwei; Gan Penglu; Yan Jia-jia; Liu Shiming; Yan Zihai;

  • 作者单位

    PowerChina Huadong Engn Corp Ltd Zhejiang Engn Res Ctr Smart Rail Transportat Hangzhou Peoples R China;

    PowerChina Huadong Engn Corp Ltd Zhejiang Engn Res Ctr Smart Rail Transportat Hangzhou Peoples R China|Zhejiang Univ Coll Civil Engn & Architecture Hangzhou Peoples R China;

    PowerChina Huadong Engn Corp Ltd Zhejiang Engn Res Ctr Smart Rail Transportat Hangzhou Peoples R China|Zhejiang Univ Coll Civil Engn & Architecture Hangzhou Peoples R China;

    PowerChina Huadong Engn Corp Ltd Zhejiang Engn Res Ctr Smart Rail Transportat Hangzhou Peoples R China;

    PowerChina Huadong Engn Corp Ltd Zhejiang Engn Res Ctr Smart Rail Transportat Hangzhou Peoples R China;

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