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Face Stability Analysis of Shield Tunnel Using Slip Line Method

机译：屏蔽隧道采用滑线法的稳定性分析

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摘要

The sufficient support pressure is essential to guarantee the safe construction of shield tunnel. Thus, it is necessary to analyze the stability and assess the limit support pressure of the tunnel face. The main methods for face stability analysis mostly focused on finite element method, limit equilibrium method, and numerical simulation method. In this paper, the slip line method is applied to analyze the stability of the tunnel face. The soil is supposed as ideal isotropic, homogeneous, and incompressible continuous material, which obeys the Mohr-Coulomb yield criterion. A mathematical model of the limit equilibrium boundary value problem is established. The slip line method is used to solve the slip line field and stress field of the soil behind the tunnel face. Limit support pressure and failure mechanism of the tunnel face are then obtained. In addition, comparisons between the results of this study and those of existing approach are performed, and the influence factors are also discussed. The results show that the slip line method is proven to be reliable for the evaluation of limit support pressure of the tunnel face stability.
机译：足够的支撑压力对于保证盾构隧道的安全结构至关重要。因此，有必要分析稳定性并评估隧道面的极限支撑压力。面部稳定性分析的主要方法主要集中在有限元法，限制平衡法和数值模拟方法上。本文应用了滑线法以分析隧道面的稳定性。土壤被认为是理想的各向同性，均匀和不可压缩的连续材料，其携带MoHR-Coulomb产率标准。建立了极限平衡边界值问题的数学模型。滑动线法用于解决隧道面后面土壤的滑线场和应力场。然后获得限制隧道面的压力和故障机理。此外，还执行该研究结果与现有方法的比较，并且还讨论了影响因素。结果表明，隧道面稳定性的限制支撑压力评估，证明了防滑线法可靠。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第19期|5902837.1-5902837.9|共9页
  • 作者

    Liu Weiping; Wan Shaofeng; Song Xinqiang; Fu Mingfu; Hu Lina;

  • 作者单位

    Nanchang Univ Sch Civil Engn & Architecture Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Civil Engn & Architecture Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Sch Civil Engn & Architecture Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Inst Technol Sch Civil Engn & Architecture Nanchang 330099 Jiangxi Peoples R China;

    Nanchang Univ Sch Civil Engn & Architecture Nanchang 330031 Jiangxi Peoples R China;

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