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

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Study on Applicability of TNT Equivalent Method to Predict Gas Explosion Load in utility tunnel

Authors
Yapeng Duan1, 2, Yonghong Gao1, 2, Yanpeng Guo1, 2, *, Liqiang Zhou1, 2, Yaoyao Zhang1, 2, Hao Wu1, 2, Zicong Wang1, 2, Dongyang Li1, 2
1State Key Laboratory of Target Vulnerability Assessment, Luoyang, Henan, 471023, China
2Engineering Protection Research Department of Defence Engineering Institute, Luoyang, Henan, 471023, China
*Corresponding author. Email: 1137442837@qq.com
Corresponding Author
Yanpeng Guo
Available Online 26 February 2026.
DOI
10.2991/978-94-6239-600-5_8How to use a DOI?
Keywords
Utility tunnel; TNT equivalent method; Gas explosion; Shock wave
Abstract

Gas pipeline leakage and explosion are the key issues in utility tunnel’s safety protection. Accurate prediction of gas explosion load in utility tunnel under realistic conditions is an important prerequisite for reasonable protection design. In this paper, taking the double-cabin model pipe gallery structure as the test platform, the TNT test of gas and equivalent TNT is designed according to TNT equivalent method, and the propagation law of gas and TNT explosion load is studied. The test results show that when a gas explosion accident occurs in utility tunnel, the peak value of gas explosion load is low and the positive pressure lasts for a long time, and there is no obvious attenuation with the increase of propagation distance. However, TNT explosion load shows the characteristics of high peak value, short duration and fast attenuation, which is quite different from gas explosion load. The error of TNT equivalent method in predicting gas explosion load is obtained, and the main reasons for the error are analyzed. The research results provide reliable suggestions for the evaluation of gas explosion accidents in utility tunnel.

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_8How 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  - Yapeng Duan
AU  - Yonghong Gao
AU  - Yanpeng Guo
AU  - Liqiang Zhou
AU  - Yaoyao Zhang
AU  - Hao Wu
AU  - Zicong Wang
AU  - Dongyang Li
PY  - 2026
DA  - 2026/02/26
TI  - Study on Applicability of TNT Equivalent Method to Predict Gas Explosion Load in utility tunnel
BT  - Proceedings of the 2025 8th International Conference on Civil Architecture, Hydropower and Engineering Management (CAHEM 2025)
PB  - Atlantis Press
SP  - 60
EP  - 68
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6239-600-5_8
DO  - 10.2991/978-94-6239-600-5_8
ID  - Duan2026
ER  -