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The additional stress caused by surface loading breaks the original stress equilibrium of the subway tunnel, triggering stress redistribution in the strata and tunnel, thus leading to longitudinal and transverse tunnel deformation. A number of engineering cases show that when the internal forces and deformation caused by surface loading exceed the allowable limits, the subway operation faces safety risks. Therefore, it is important to study the longitudinal deformation response of tunnels under surface loading.

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Theoretical Analysis of Tunnel Longitudinal Deformation Under Surcharge Loading

  • 章节

  • 发表日期：

    2025年

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  • Rulu Wang,
  • Fayun Liang,
  • Jiaping Li,
  • Zhao Yuan

摘要

The additional stress caused by surface loading breaks the original stress equilibrium of the subway tunnel, triggering stress redistribution in the strata and tunnel, thus leading to longitudinal and transverse tunnel deformation. A number of engineering cases show that when the internal forces and deformation caused by surface loading exceed the allowable limits, the subway operation faces safety risks. Therefore, it is important to study the longitudinal deformation response of tunnels under surface loading.