Review of state-of-the-art in structural health monitoring of tunnel engineering

Abstract

Structural health-monitoring (SHM) systems are essential for ensuring the safety, reliability, and longevity of tunnel structures. This paper reviews the application of SHM systems in tunnels based on examples from 51 projects worldwide that have implemented such systems. Commonly used monitoring indicators and their classifications are outlined, and the selection criteria for these indicators under different operating conditions are clarified. Additionally, it summarizes the main monitoring and measurement technologies and introduces methods for preprocessing and analyzing large-scale monitoring data. The current limitations of SHM systems are discussed and future research directions to address these gaps are proposed. The objective of this study is to provide a complete guide for enhancing and innovating SHM systems in tunnel engineering.

Keywords

Tunnel / Structural health monitoring / Monitoring indicators / Big data / Sensor

CRediT authorship contribution statement

Weizhong Chen: Writing -original draft, Resources, Methodology, Investigation, Funding acquisition, Data curation, Conceptualization. Xu-Yan Tan: Writing -original draft, Visualization, Validation, Data curation. Jianping Yang: Writing -review & editing, Validation, Supervision, Resources, Methodology.

Declaration of competing interests

Weizhong Chen is an Associate Editor for this journal, and was not involved in the editorial review or the decision to publish this article. All authors declare that there are no competing interests.

Acknowledgements

This study was supported by the “National Key Research and Development Program of China” (2024YFF0508203 and 2021YFC3100805) and the “Major Program of the National Natural Science Foundation of China (grant no. 42293355).”

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