Proceedings of the 2025 8th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2025)

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Stability Analysis of Surrounding Rock for Diversion Tunnel of Hydropower Station

Authors
Ying Zhang1, 2, *, Shengjie Di1
1Northwest Engineering Corporation Limited, Power China, Xi’an, Shaanxi, 710065, China
2High Slope and Geological Disaster Research and Control Sub-center, China Hydropower Technology Research and Development Centre, Xi’an, Shaanxi, 710065, China
*Corresponding author. Email: zhangying@nwh.cn
Corresponding Author
Ying Zhang
Available Online 26 February 2026.
DOI
10.2991/978-94-6239-600-5_6How to use a DOI?
Keywords
diversion tunnel; hydropower station; stability analysis; surrounding rock
Abstract

The surrounding rock instability for hydropower diversion tunnels can cause progressive failure and catastrophic consequences, making proper support design critical. This study investigates diversion tunnel stability of hydropower station under complex geology, using numerical simulation to analyze deformation and plasticity of surrounding rock in different support scenarios. Results show unsupported excavation causes severe deformation and extensive plastic zones, while combined rock bolt-steel set support controls deformation effectively. The optimal scheme-9-m rock bolts with steel sets provides sufficient safety margin. The research results can provide reference for the design and construction of hydraulic tunnels.

Copyright
© 2026 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 8th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2025)
Series
Advances in Engineering Research
Publication Date
26 February 2026
ISBN
978-94-6239-600-5
ISSN
2352-5401
DOI
10.2991/978-94-6239-600-5_6How to use a DOI?
Copyright
© 2026 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  - Ying Zhang
AU  - Shengjie Di
PY  - 2026
DA  - 2026/02/26
TI  - Stability Analysis of Surrounding Rock for Diversion Tunnel of Hydropower Station
BT  - Proceedings of the 2025 8th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2025)
PB  - Atlantis Press
SP  - 40
EP  - 48
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6239-600-5_6
DO  - 10.2991/978-94-6239-600-5_6
ID  - Zhang2026
ER  -