Proceedings of the 2025 International Conference on Engineering Management and Safety Engineering (EMSE 2025)

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Numerical Simulation of Water-Rich Fault Fracture Zone of Tunnel Considering Fluid Solid Coupling

Authors
Ran Xu1, *, Jianhe Li1, Miao Wang1
1Changjiang Survey, Planning, Design and Research Co., Ltd., Wuhan, 430010, China
*Corresponding author. Email: xuran@cjwsjy.com.cn
Corresponding Author
Ran Xu
Available Online 3 July 2025.
DOI
10.2991/978-94-6463-780-9_34How to use a DOI?
Keywords
Tunnel Engineering; Fault Fracture Zone; Water Inrush; Fluid-Solid Coupling
Abstract

During the construction of tunnels when crossing water-rich fault fracture zones, large-scale water inrushes often occur, thus making the study of the mechanical mechanisms behind water inrushes in fault fracture zones scientifically significant. Based on the actual construction conditions of tunnel projects, the fundamental principles of groundwater seepage, and the theory of elastoplastic mechanics, combined with the engineering case of water inrush in the Xiaopu Tunnel, a mathematical model for tunnels crossing water-rich fault fracture zones is established. With the aid of Comsol, the variation patterns of the stress field and seepage field in the surrounding rock during tunnel excavation towards the fault zone are simulated. The conclusions drawn are as follows: After the tunnel excavation enters the fault fracture zone, the pore water pressure dissipates significantly, leading to an expanded unloading range of the surrounding rock, intensified stress relaxation. The displacement of the surrounding rock around the tunnel increases sharply and abruptly, and the tunnel seepage velocity increases markedly.

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 Engineering Management and Safety Engineering (EMSE 2025)
Series
Advances in Engineering Research
Publication Date
3 July 2025
ISBN
978-94-6463-780-9
ISSN
2352-5401
DOI
10.2991/978-94-6463-780-9_34How 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  - Ran Xu
AU  - Jianhe Li
AU  - Miao Wang
PY  - 2025
DA  - 2025/07/03
TI  - Numerical Simulation of Water-Rich Fault Fracture Zone of Tunnel Considering Fluid Solid Coupling
BT  - Proceedings of the 2025 International Conference on Engineering Management and Safety Engineering (EMSE 2025)
PB  - Atlantis Press
SP  - 367
EP  - 376
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-780-9_34
DO  - 10.2991/978-94-6463-780-9_34
ID  - Xu2025
ER  -