International Journal of Frontiers in Engineering Technology, 2023, 5(6); doi: 10.25236/IJFET.2023.050605.
Yubo Luo1, Haoxiang Li2, Tongqing Wei3, Jialin Ma4
1Central South University, Changsha, China
2City University of Hong Kong, Kowloon Town, Kowloon, Hong Kong, China
3The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
4Zhejiang Normal University, Jinhua, Zhejiang, China
Fire accidents pose a great threat to the normal operation of underwater immersed tube tunnels, and failure to control or improper control will lead to serious disaster consequences. Based on the potential risks, this work explores the characteristics on the exhaust outlets and safety doors of underwater immersed tube tunnels from the smoke extraction and personnel evacuation. First, a one-way immersed tube tunnel was established by employing FDS numerical simulation software. And the characteristic parameters of smoke extraction in tunnel fire were analyzed by referring to the structural parameters of a certain domestic immersed tube tunnel. The longitudinal velocity and the exhaust outlet opening strategy were then analyzed. Finally, Pathfinder was used to simulating and calculating the required safe evacuation time (TRSET), and through its comparison with the calculated available safe evacuation time (TASET), the optimal safety door spacing and width were determined, which is expected to provide a reference example for studying the coupled smoke extraction characteristics of underwater immersed tunnels fire.
Immersed Tube Tunnel; Numerical Simulation; Smoke Exhaust Strategy; Evacuation
Yubo Luo, Haoxiang Li, Tongqing Wei, Jialin Ma. Study on the Coupled Smoke Characteristics and Evacuation of Underwater Immersed Tube in Tunnel Fire. International Journal of Frontiers in Engineering Technology (2023), Vol. 5, Issue 6: 30-36. https://doi.org/10.25236/IJFET.2023.050605.
[1] Zeng Y, Liu K, Fang Y, Zhang X, and Bai Y. Fire Model Test on Temperature Field in the Rescue Station of an Extralong Railway Tunnel. Advances in Civil Engineering. 2019; 2019: 1-12.
[2] H. Kurioka, Y. Oka, H. Satoh, and O. Sugawa. Fire properties in the near field of square fire source with longitudinal ventilation in tunnels. Fire Safety Journal. 2003; 38 (4): 319-340.
[3] Y. Oka and G. T. Atkinson. Control of smoke flow in tunnel fires. Fire Safety Journal. 1995; 25: 305–322.
[4] T. Jin and T. Yamada. Irritating Effects of Fire Smoke on Visibility. Fire Science and Technology. 1985; 5: 79-90.
[5] J. A. Milke. Evaluating the early development of smoke hazard from fires in large spaces / Discussion. ASHRAE Transactions. 2000; 106(1): 627-636.
[6] J. L. Bryan. Human Behaviour in Fire: The Development and Maturity of a Scholarly Study Area. Fire and Materials. 1999; 23(6): 249–253.
[7] Jun L. Influence of tunnel horizontal ventilation exhaust tunnel setting on exhaust effect. Fire Science and Technology. 2013; 32(7): 727–730. (In Chinese)
[8] Yanbo L, Yanhua Z, Baiwan H, et al. Research on Fire Control of Danchi Double Division Highway Tunnel. Journal of Underground Space and Engineering. 2013; 9(4): 959-964. (In Chinese)
[9] Pai X. Study on Fire Motion Mechanism of Hong Kong-Zhuhai-Macao Bridge. Chong Qing. 2014. (In Chinese)
[10] Changkun C and Zhisheng X. Design and Analysis of Safety Evacuation Performance of Changda Highway Tunnel. China Engineering Science. 2007; 9(9): 78–83, 2007. (In Chinese)
[11] Yingang F, Hehua Z, and Zhiguo Y. Research of Evacuation and Rescue Measures in Shanghai Yangtze River Tunnel. Chinese Journal of Underground Space and Engineering. 2010; 6(2): 418–422. (In Chinese)
[12] Xiaoyun L, Xianfeng M, and Junsong W. Research on Evacuation and Rescue in Road Tunnel under Fire. China Safety Science Journal. 2011; 21(5): 66–71. (In Chinese)