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Identifying the dominant influencing factors of secondary lining cracking risk in an operating mountain tunnel

Zhangtao Peng (School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China) (Key Laboratory for Urban Underground Engineering of the Education Ministry, Beijing Jiaotong University, Beijing, China)
Qian Fang (Key Laboratory for Urban Underground Engineering of the Education Ministry, Beijing Jiaotong University, Beijing, China)
Qing Ai (School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China)
Xiaomo Jiang (State Key Laboratory of Structural Analysis for Industrial Equipment, Provincial Key Laboratory of Digital Twin for Industrial Equipment, School of Energy and Power Engineering, Dalian University of Technology, Dalian, China)
Hui Wang (School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China)
Xingchun Huang (School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China)
Yong Yuan (College of Civil Engineering, Tongji University, Shanghai, China)

International Journal of Structural Integrity

ISSN: 1757-9864

Article publication date: 10 June 2024

Issue publication date: 20 August 2024

61

Abstract

Purpose

A risk-based method is proposed to identify the dominant influencing factors of secondary lining cracking in an operating mountain tunnel with weak surrounding rock.

Design/methodology/approach

Based on the inspection data from a mountain tunnel in Southwest China, a lognormal proportional hazard model is established to describe the statistical distribution of secondary lining cracks. Then, the model parameters are obtained by using the Bayesian regression method, and the importance of influencing factors can be sorted based on the absolute values of the parameters.

Findings

The results show that the order of importance of the influencing factors of secondary lining cracks is as follows: location of the crack on the tunnel profile, rock mass grade of the surrounding rock, time to completion of the secondary lining, and void behind the secondary lining. Accordingly, the location of the crack on the tunnel profile and rock mass grade of the surrounding rock are the two most important influencing factors of secondary lining cracks in the investigated mountain tunnel, and appropriate maintenance measures should be focused on these two aspects.

Originality/value

This study provides a general and effective reference for identifying the dominant influencing factors of secondary lining cracks to guide the targeted maintenance in mountain tunnels.

Keywords

Acknowledgements

The authors gratefully acknowledge financial support from the Key Laboratory of Urban Underground Engineering, Ministry of Education of China (Grant No. TUL 2022-02); the Key Project of High-speed Rail Joint Fund of the National Natural Science Foundation of China (Grant No. U1934210); the National Natural Science Foundation of China (Grant No. 51808336); and the Science and Technology Commission of Shanghai Municipality (Grant No. 21DZ1203504).

Citation

Peng, Z., Fang, Q., Ai, Q., Jiang, X., Wang, H., Huang, X. and Yuan, Y. (2024), "Identifying the dominant influencing factors of secondary lining cracking risk in an operating mountain tunnel", International Journal of Structural Integrity, Vol. 15 No. 4, pp. 731-756. https://doi.org/10.1108/IJSI-03-2024-0047

Publisher

:

Emerald Publishing Limited

Copyright © 2024, Emerald Publishing Limited

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