Study on the Natural Smoke Exhaust Performance of Board-Coupled Vertical Shaft in High-Altitude Tunnel Fires

被引:2
|
作者
Gao, Zihe [1 ]
Zhao, Pengju [1 ]
Wu, Zhaoguo [2 ]
Cai, Jiajun [1 ]
Li, Linjie [3 ]
机构
[1] Zhengzhou Univ, Sch Civil Engn, Zhengzhou 450002, Peoples R China
[2] State Grid Chongqing Elect Power Res Inst, Chongqing 401123, Peoples R China
[3] Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing 400074, Peoples R China
来源
FIRE-SWITZERLAND | 2024年 / 7卷 / 08期
关键词
numerical simulation; vertical shaft division; board-coupled shaft; board height; environmental pressure; vertical shaft plug hole; natural ventilation; VENTILATION;
D O I
10.3390/fire7080274
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Vertical shaft natural ventilation is a common smoke exhaust method in highway tunnel fires. This study investigated the vertical shaft natural smoke exhaust work in highway tunnel fires with the effect of multiple factors through numerical simulation. Using the analysis of the flow field of smoke in nearby areas of the vertical shaft and the quantitative calculation of the gas exhausted through the vertical shaft, considering the impact of shaft division and board height, an optimal vertical shaft arrangement was proposed, and the working conditions of this arrangement in low-pressure environments were discussed. The results show that dividing a single large vertical shaft into multiple small vertical shafts and appropriately adjusting the board height can reduce the incidence of vertical shaft plug holes and significantly enhance the vertical shaft smoke exhaust performance. Meanwhile, the board-coupled shaft (BCS) has excellent working ability in low-pressure environments, and when pressure drops, smoke exhaust efficiency will improve. This research offers a foundation and reference value for improving the vertical shaft smoke exhaust system in highway tunnels.
引用
收藏
页数:15
相关论文
共 26 条
  • [1] Improvement in smoke extraction efficiency by natural ventilation through a board-coupled shaft during tunnel fires
    Cong, H. Y.
    Wang, X. S.
    Zhu, P.
    Jiang, T. H.
    Shi, X. J.
    APPLIED THERMAL ENGINEERING, 2017, 118 : 127 - 137
  • [2] Experimental study of the influences of board size and position on smoke extraction efficiency by natural ventilation through a board-coupled shaft during tunnel fires
    Cong, H. Y.
    Wang, X. S.
    Zhu, P.
    Jiang, T. H.
    Shi, X. J.
    APPLIED THERMAL ENGINEERING, 2018, 128 : 614 - 624
  • [3] Experimental studies on the smoke extraction performance by natural ventilation with a board-coupled shaft in a deep buried tunnel
    Cong, Haiyong
    Bi, Mingshu
    Ren, Jingjie
    Li, Bei
    Bi, Yubo
    Li, Yanchao
    Jiang, Haipeng
    Gao, Wei
    TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2020, 106
  • [4] Smoke exhaust characteristics under stack effect of natural ventilation by shaft in high-altitude tunnel
    Gao, Zihe
    Cai, Jiajun
    Wang, Pu
    Liu, Mingge
    Li, Linjie
    THERMAL SCIENCE AND ENGINEERING PROGRESS, 2024, 48
  • [5] Experimental and theoretical studies on the heat extraction performance by natural ventilation with a board-coupled shaft during tunnel fires
    Cong, Haiyong
    Bi, Mingshu
    Zhang, Shulin
    Li, Bei
    Ren, Jingjie
    Gao, Wei
    INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2019, 141 (96-102) : 96 - 102
  • [6] Effects of fire source position on smoke extraction efficiency by natural ventilation through a board-coupled shaft during tunnel fires
    Cong, Haiyong
    Wang, Xishi
    Kong, Xiangxiao
    Xu, Hongli
    PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2019, 37 (03) : 3975 - 3984
  • [7] Investigation on the natural smoke exhaust performance by vertical shaft in tunnel fires under different ambient pressures
    Gao, Zihe
    Cai, Jiajun
    Jiang, Lin
    Mensah, Rhoda Afriyie
    Fan, Chuangang
    INDOOR AND BUILT ENVIRONMENT, 2024, 33 (08) : 1415 - 1430
  • [8] Study of smoke movement characteristics in tunnel fires in high-altitude areas
    Yan, Guanfeng
    Wang, Mingnian
    Yu, Li
    Tian, Yuan
    Guo, Xiaohan
    FIRE AND MATERIALS, 2020, 44 (01) : 65 - 75
  • [9] Numerical investigation on the smoke extraction performance through natural ventilation via board-coupled shaft in tunnel with multiple burial depth
    Shao, Zhuyu
    Cong, Haiyong
    Bi, Mingshu
    Bi, Yubo
    Mu, Xuemeng
    Zhu, Bin
    Yuan, Ziqi
    Wang, Xishi
    INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2023, 185
  • [10] Performance validation of the heat extraction performance by the natural ventilation with a board-coupled shaft in a deep buried tunnel
    Cong, Haiyong
    Bi, Mingshu
    Ren, Jingjie
    Li, Bei
    Bi, Yubo
    Gao, Wei
    TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2022, 119