Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)

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Research on Risk Evaluation of Flooding in Immersed Tunnels During Operation

Authors
Senyang Wu1, 2, Le Li1, 2, Hongwei Ji1, 2, *, Xingxing Wang1, 2, Qinglin Li1, 2, Cheng Yu1, 2
1China Merchants ChongQing Highway Engineering Testing Center Co., LTD., Chongqing, China
2China Merchants ChongQing Communications Technology Research & Design Institute Co., LTD., Chongqing, China
*Corresponding author. Email: jihongwei@cmhk.com
Corresponding Author
Hongwei Ji
Available Online 22 September 2025.
DOI
10.2991/978-94-6463-856-1_10How to use a DOI?
Keywords
Immersed tunnel,operation period; flooding; risk assessment
Abstract

Due to the inherent characteristics of immersed tunnels, any unexpected incident during operational periods may lead to immeasurable losses, necessitating heightened attention to safety risks. This study investigates the structural impacts of flooding risks in operational immersed tunnels through numerical simulation and scenario analysis. Under three distinct flooding conditions (1/3 cross-section, 1/2 cross-section, and full cross-section inundation), the maximum negative bending moments at transverse sections measure -630.7 kN·m, -566.1 kN·m, and -1197 kN·m respectively. Corresponding longitudinal structural moments reach -851.4 × 103 kN·m, -127.7 × 104 kN·m, and -204.3 × 104 kN·m. Results demonstrate that joint internal forces remain within structural bearing capacities under 1/3 and 1/2 cross-section flooding conditions. However, full cross-section inundation causes joint forces to exceed conventional operational limits while remaining within acceptable thresholds for accidental loads. The findings highlight critical thresholds for structural safety assessments during tunnel flooding events.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
Series
Advances in Engineering Research
Publication Date
22 September 2025
ISBN
978-94-6463-856-1
ISSN
2352-5401
DOI
10.2991/978-94-6463-856-1_10How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Senyang Wu
AU  - Le Li
AU  - Hongwei Ji
AU  - Xingxing Wang
AU  - Qinglin Li
AU  - Cheng Yu
PY  - 2025
DA  - 2025/09/22
TI  - Research on Risk Evaluation of Flooding in Immersed Tunnels During Operation
BT  - Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
PB  - Atlantis Press
SP  - 87
EP  - 99
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-856-1_10
DO  - 10.2991/978-94-6463-856-1_10
ID  - Wu2025
ER  -