Research on a safety evaluation system for railway-tunnel structures by fuzzy comprehensive evaluation theory

Authors

  • Yanfeng Li Shenyang Jianzhu University
  • Jialong Li Shenyang Jianzhu University
  • Jihe Zhao Liaoning Technical University
  • Tongfeng Zhao Liaoning Provincial College of Communications
  • Dong Guo Dalian Branch of China Railway Ninth Bureau Group Co., Ltd.

DOI:

https://doi.org/10.14311/CEJ.2023.01.0010

Keywords:

Railway tunnels, Safety factor, Tensile range of vault, Safety evaluation, Fuzzy comprehensive evaluation

Abstract

Long-term health detection of railway-tunnel is the development direction and trend of future railway tunnel research. Based on the actual engineering of a railway tunnel, this study developed a safety evaluation model for railway tunnel structures using a fuzzy comprehensive evaluation method and examined a health state evaluation method suitable for most railway tunnel structures. The results showed that the evaluation method comprehensively reflected the impact of various factors, which had strong practicality. The evaluation results were clear, accurate, and consistent with engineering practice. When using the safety factor index to study the stress of a railway tunnel structure, Midas/civil analysis showed that different levels of the surrounding rock structural vault in railway tunnels were in a tensile, control-bearing capacity state. When calculating safety factors, the range of a 60° central angle of a railway tunnel vault was calculated according to the tensile control-bearing capacity. Theoretical formulas of the range of the center angle φ0 of the vault tension zone were derived and then verified by experiments and numerical analysis.

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Published

2023-04-30

How to Cite

Li, Y., Li, J., Zhao, J., Zhao, T., & Guo, D. (2023). Research on a safety evaluation system for railway-tunnel structures by fuzzy comprehensive evaluation theory. Stavební Obzor - Civil Engineering Journal, 32(1), 122–136. https://doi.org/10.14311/CEJ.2023.01.0010

Issue

Vol. 32 No. 1 (2023)

Section

Articles

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