Detection of structural diseases in tunnels under water-rich environments and performance evaluation of lining drainage structures
Abstract Tunnels mostly adopt the waterproof and drainage ling structure of setting up the central drainage ditch in the invert lining. However, this structure is often faced with the fact that the water accumulated at the bottom of the tunnel cannot be drained effectively, which leads to frost boil...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2025-07-01
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| Series: | Discover Applied Sciences |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s42452-025-07379-2 |
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| Summary: | Abstract Tunnels mostly adopt the waterproof and drainage ling structure of setting up the central drainage ditch in the invert lining. However, this structure is often faced with the fact that the water accumulated at the bottom of the tunnel cannot be drained effectively, which leads to frost boiling and mud pumping, cracks at the bottom, deformation of the roadbed and other hazards. Therefore, there is an urgent need to solve the problem of waterproof and drainage at tunnel bottom in water-rich regions. This paper analyzes the causes of tunnel bottom hazards under long-term water pressure through in-site detection of tunnel bottom hazards in operation period. The drainage and pressure relief capacity, cracking resistance, and mechanical properties of the central drainage ditch invert type lining and the catchment corridor floor type lining are analyzed, and it is proposed that the catchment corridor floor type lining is more suitable for long-term water-rich environments. The study reveals that, under the long-term dynamic loading action of the train in the water-rich environment, the lack of effective drainage of groundwater in the central drainage ditch invert type lining is the main cause of the tunnel bottom hazards. Compared with the central drainage ditch invert type lining, the drainage and pressure relief capacity of the catchment corridor floor type lining is increased by about 20%, which can effectively solve the problem of long-term water accumulation at tunnel bottom. The latter exhibits a 38.89% improvement in crack resistance compared to the former. The catchment corridor floor type lining has better cracking resistance than the central drainage ditch invert type lining. The safety factors for both lining types exceed 2.0, demonstrating compliance with structural safety control requirements. |
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| ISSN: | 3004-9261 |