Effect of Bolting on the Face of a Crushed Soft Rock Tunnel

https://doi.org/10.5614/j.eng.technol.sci.2026.58.1.4

Authors

  • Lei Chen CSCEC International, Suzhou High-tech Zone 215163
  • Yuxuan Cao China Construction Third Engineering Bureau Group Co., Ltd. Wuhan Wuchang District 430073,
  • Tongkai Wen China Construction Seventh Engineering Division Corp., Ltd. Zhengzhou Economic Development Zone 450048,
  • Haobin Zhang College of Resource Engineering, Xi'an University of Architecture and Technology, Xi 'an Beilin District 710055, https://orcid.org/0009-0003-3653-5058
  • Zhanping Song School of Civil Engineering, Xi'an University of Architecture and Technology, Xi 'an Beilin District 710055,
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Abstract

To study the large deformation of surrounding rock during the passage of a soft rock tunnel through a fractured zone, a numerical simulation analysis was conducted on a specific tunnel section. The investigation focused on the extrusion deformation at the face, settlement deformation of the arch roof, and stress in the surrounding rock, considering the two support types used in the New Austrian Tunneling Method. The results show that the use of anchor bolts can reduce the pre-convergence deformation by 58.1% and its proportion by 23.5%, significantly increasing the minimum principal stress at the palm surface, maintaining the advanced core soil in the three-way stress state, and enhancing the longitudinal arch effect. These factors enhance the overall stability of the tunnel. Field monitoring data reveal that the convergence deformation of each part of the tunnel remains within a reasonable range, demonstrating the effectiveness of the face bolt in controlling deformation and adjusting the surrounding rock stress in the stratum, characterized by low quality and high degree of crushing.

How to Cite

Lei Chen, Yuxuan Cao, Tongkai Wen, Haobin Zhang, Zhanping Song (2025). Effect of Bolting on the Face of a Crushed Soft Rock Tunnel . Journal of Engineering and Technological Sciences, Vol. 58 No. 1 (2026): Vol. 58 No. 1(2026): February , 47-57. https://doi.org/10.5614/j.eng.technol.sci.2026.58.1.4

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References

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Date Log

Submitted
January 15, 2025
Accepted
October 28, 2025
Published
December 10, 2025

Keywords

  • face bolt
  • novelty method
  • palm surface extrusion deformation
  • pre-convergence deformation
  • surrounding rock stress

Issue

Vol. 58 No. 1 (2026): Vol. 58 No. 1(2026): February

Section

Articles

How to Cite

Effect of Bolting on the Face of a Crushed Soft Rock Tunnel . (2025). Journal of Engineering and Technological Sciences, 58(1), 47-57. https://doi.org/10.5614/j.eng.technol.sci.2026.58.1.4

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