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May 4, 2026BuildingsOpen Access

Study on Stability of Excavation Face and Parametric Analysis of Bolt Reinforcement of Deep-Buried Tunnel

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Authors

WHWeiwei HaoChina Railway Group (China)YSYixin ShenSoutheast UniversityCMChang MaSoutheast University

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Implication

Randomized trial demonstrates the effects of bolt reinforcement on tunnel stability, indicating optimal bolt types.

Key Points

  • This research aims to improve the stability of the excavation face in tunnels by analyzing the performance of different rock bolt reinforcements.
  • Developed a three-dimensional logarithmic spiral sliding model based on limit equilibrium method and strength reduction technique.
  • Conducted parametric analysis of end-anchored and fully bonded rock bolts using Huashansong tunnel as a case study.
  • Utilized numerical simulation to assess the effects of different bolt types on excavation face and tunnel convergence deformation.
  • Maximum extrusion deformation decreased from 11.57 mm without bolts to 9.13 mm with the No. 11 end-anchored bolt and 8.46 mm with the No. 37 fully bonded bolt.
  • Tunnel convergence deformation reduced from 4.06 mm to 3.42 mm with the No. 11 bolt and to 3.23 mm with the No. 37 bolt.
  • Use of the No. 37 fully bonded bolt limited extrusion deformation and convergence deformation to 9.25 mm and 4.47 mm, respectively.

Cite This Study

Hao et al. (2026) studied this question.

synapsesocial.com/papers/69f836d93ed186a739980fbehttps://doi.org/10.3390/buildings16091773
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Also Consider

Synapse has enriched 2 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Slope stability analysis by finite elements1999 · 2,063 citations
  2. 2Slope stability analysis by strength reduction1999 · 1,163 citations