Proceedings of the 2024 6th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2024)

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Simulation Analysis of Stability for Layered Soft Rock Underground Powerhouse Cavern Groups

Authors
Feng Zhang1, Shuguang Zhou1, Wenjun Wang2, *
1Chongqing Panlong Pumped Storage Power Plant Co., Ltd., Chongqing, China
2College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China
*Corresponding author. Email: wenjunwang@hhu.edu.cn
Corresponding Author
Wenjun Wang
Available Online 30 April 2025.
DOI
10.2991/978-94-6463-688-8_7How to use a DOI?
Keywords
Underground powerhouse; soft rock caverns; numerical simulation; stability analysis; panlong pumped storage power station
Abstract

Currently, the construction of pumped storage power stations is in a peak period, and due to layout requirements at the station’s location, it is sometimes challenging to find ideal geological conditions for the underground powerhouse location. This necessitates excavating underground caverns in areas with partially layered soft rock distribution. This study, based on the Panlong Pumped Storage Power Station project, delves deep into the stability of large underground cavern groups located in regions with partially layered soft rock distribution. The research reveals that significant deformations in the surrounding rock of the caverns with alternating soft and hard rock layers predominantly occur within the soft rock layers. Additionally, the larger principal stress concentrations tend to occur within the hard rock adjacent to the soft rock. The findings of this study have important practical implications for a comprehensive understanding of the displacement, stress, and plastic zone distribution patterns in such caverns’ surrounding rock. These results can be used to guide the design of cavern support systems.

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 2024 6th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2024)
Series
Advances in Engineering Research
Publication Date
30 April 2025
ISBN
978-94-6463-688-8
ISSN
2352-5401
DOI
10.2991/978-94-6463-688-8_7How 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  - Feng Zhang
AU  - Shuguang Zhou
AU  - Wenjun Wang
PY  - 2025
DA  - 2025/04/30
TI  - Simulation Analysis of Stability for Layered Soft Rock Underground Powerhouse Cavern Groups
BT  - Proceedings of the 2024 6th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2024)
PB  - Atlantis Press
SP  - 56
EP  - 67
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-688-8_7
DO  - 10.2991/978-94-6463-688-8_7
ID  - Zhang2025
ER  -