Study on the Influence of Gas Leakage Direction on Explosion Load in Utility Tunnel

DOI

10.2991/978-94-6239-682-1_3How to use a DOI?

Keywords

Utility tunnel; Leakage direction; Concentration gradient; Gas explosion

Abstract

Utility tunnel is an important link in the construction and operation of modern cities, and the entrance of gas pipelines into corridors has brought great challenges to the safety protection of utility tunnel. This paper focuses on the free diffusion gas clouds within model integrated utility tunnels as the test subjects, investigating the spatial distribution of gases and explosion loads under different gas leakage directions. The test results indicate that gas leakage in a utility tunnel will propagate from top to bottom, spreading from the near end to the far end, with the horizontal propagation velocity gradually decreasing from top to bottom. The upward leakage will form the most obvious vertical stratification phenomenon, and the downward and horizontal leakage will weaken in turn. Under the test conditions of this paper, there is a positive correlation between gas explosion load and propagation distance. And the peak gas explosion load is the highest under horizontal leakage conditions. Fire-resistant isolation under gas explosion load is the weak part of structural damage. The research findings provide a reliable basis for the design of utility tunnel disaster prevention and mitigation.

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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TY  - CONF
AU  - Yapeng Duan
AU  - Yonghong Gao
AU  - Liqiang Zhou
AU  - Yaoyao Zhang
AU  - Hao Wu
AU  - Zicong Wang
AU  - Dongyang Li
PY  - 2026
DA  - 2026/06/30
TI  - Study on the Influence of Gas Leakage Direction on Explosion Load in Utility Tunnel
BT  - Proceedings of the 2025 7th International Conference on Civil Architecture and Urban Engineering (ICCAUE 2025)
PB  - Atlantis Press
SP  - 14
EP  - 25
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6239-682-1_3
DO  - 10.2991/978-94-6239-682-1_3
ID  - Duan2026
ER  -