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This research aims to investigate the interaction relationships between ground surface settlements induced by the construction of continuous small-radius shield tunnels and their related influencing factors. By establishing a finite element model and using the control variable method, key factors such as the elastic modulus of grouting materials, equivalent layer thickness, and soil cover thickness were studied, and the impact of these factors on surface settlement was systematically analyzed. The results indicate that ground subsidence during closely curved shield tunneling is negatively correlated with the changes in the elastic modulus of grouting material, equivalent layer thickness, and soil cover thickness. On this basis, it is recommended to control the tunnel burial depth within the range of 15–25 m and prioritize the selection of grouting materials with higher elastic modulus. Meanwhile, to ensure the safety and stability of shield tunneling construction, it is recommended to set the equivalent layer thickness to 0.2 m.

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Research and Analysis on the Influencing Factors of Surface Settlement During Continuous Small Radius Shield Tunneling Construction

  • 会议论文

  • 发表日期：

    2026年

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  • Bo Liu,
  • Tai Ge,
  • Yang Han

摘要

This research aims to investigate the interaction relationships between ground surface settlements induced by the construction of continuous small-radius shield tunnels and their related influencing factors. By establishing a finite element model and using the control variable method, key factors such as the elastic modulus of grouting materials, equivalent layer thickness, and soil cover thickness were studied, and the impact of these factors on surface settlement was systematically analyzed. The results indicate that ground subsidence during closely curved shield tunneling is negatively correlated with the changes in the elastic modulus of grouting material, equivalent layer thickness, and soil cover thickness. On this basis, it is recommended to control the tunnel burial depth within the range of 15–25 m and prioritize the selection of grouting materials with higher elastic modulus. Meanwhile, to ensure the safety and stability of shield tunneling construction, it is recommended to set the equivalent layer thickness to 0.2 m.