Tunnel Lining Structural Integrity and Failure Mechanisms
Summary
Tunnel linings form the critical boundary between an excavated cavity and its surrounding ground, ensuring stability, water tightness and safe long-term operation. Their integrity depends on material performance, construction quality and the interaction with geological and hydraulic conditions. Common failure mechanisms include cracking under tensile or shear stress, void formation behind the lining, corrosion of reinforcement and deterioration at cold joints. Geological hazards such as fault movements, water ingress or biased terrain stresses can induce unexpected load redistributions, while construction defects and environmental degradation over time may exacerbate damage. Quantitative assessment of lining performance employs indicators such as damage indices, stress–strain response and deformation monitoring. Understanding these processes has global significance for the design, maintenance and retrofitting of tunnels in urban metros, high-speed railways and highway networks, where safety, serviceability and cost-effective rehabilitation are paramount.
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Tunnel Lining Structural Integrity and Failure Mechanisms publication trend
The graph below shows the total number of articles in tunnel lining structural integrity and failure mechanisms across all publications each year (not limited to Nature Index journals).
Technical terms
Tunnel lining: The structural layer installed against the excavated rock or soil to support loads, control deformation and prevent water ingress.
Cold joint: A discontinuity in concrete created when a fresh pour is placed against previously set material, potentially weakening the bond and becoming a crack initiation site.
Void: A gap behind the lining formed by insufficient backfill, material loss or ground movement, leading to uneven load distribution and stress concentrations.
Fluid–solid coupling: The interactive process in which groundwater pressures influence mechanical deformation of the surrounding rock and lining, and vice versa.
References
- Study on deterioration, cracking mechanism and treatment measures of plain concrete lining with cold joints in high-speed railroad tunnel. Case Studies in Construction Materials (2023).
- Study on the Mechanical Behavior of Fluid–Solid Coupling in Shallow Buried Tunnels under Different Biased Terrain. Symmetry (2022).
- Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks. Advances in Civil Engineering (2020).
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