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特长公路隧道火灾烟气沉降特性对人员疏散影响的研究*
引用本文:戎贤,许家杰,张新宇,岳凌锋,贾献卓,张晓巍. 特长公路隧道火灾烟气沉降特性对人员疏散影响的研究*[J]. 中国安全生产科学技术, 2023, 19(2): 128-135. DOI: 10.11731/j.issn.1673-193x.2023.02.018
作者姓名:戎贤  许家杰  张新宇  岳凌锋  贾献卓  张晓巍
作者单位:(1.河北工业大学 土木与交通学院,天津 300401;2.河北省土木工程技术研究中心,天津 300401;3.中交建冀交高速公路投资发展有限公司,河北 石家庄 050000)
基金项目:* 基金项目: 河北省重点研发项目(19275404D);河北省交通运输厅科技项目(TH1-202020)
摘    要:为研究特长公路隧道火灾烟气沉降对人员疏散安全的影响,通过数值模拟方法,对0,1.0,1.5 m/s和临界风速值4种不同纵向通风风速下隧道火灾烟气沉降特征进行研究,并分析不同风速下烟气沉降对人员疏散的影响。研究结果表明:在无纵向风时,烟气沉降现象较为明显,烟气下沉造成的不均匀烟气温度、能见度分布,提前终止人员疏散的进行;随着纵向风速的增加,沉降现象仍存在,但沉降点后移,对人员疏散的影响减小;在1.5 m/s的纵向通风条件下,火源下游500 m范围内烟气基本不发生沉降且能维持分层,此时几乎不影响火灾下游人员疏散。在实际应用中,火灾初期可先以1.5 m/s的分层风速值进行通风,待下游人员疏散后,再施加临界风速加快烟气排出。研究结果可为特长公路隧道火灾防治和疏散救援提供参考。

关 键 词:特长公路隧道  烟气沉降  纵向通风  人员疏散  数值模拟

Research on influence of fire smoke descent characteristics on personnel evacuation in extra-long highway tunnel
RONG Xian,XU Jiajie,ZHANG Xinyu,YUE Lingfeng,JIA Xianzhuo,ZHANG Xiaowei. Research on influence of fire smoke descent characteristics on personnel evacuation in extra-long highway tunnel[J]. Journal of Safety Science and Technology, 2023, 19(2): 128-135. DOI: 10.11731/j.issn.1673-193x.2023.02.018
Authors:RONG Xian  XU Jiajie  ZHANG Xinyu  YUE Lingfeng  JIA Xianzhuo  ZHANG Xiaowei
Affiliation:(1.School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;2.Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China;3.Zhong Jiao Jian Ji Jiao Highway Investment Development Co.,Ltd.,Shijiazhuang Hebei 050000,China)
Abstract:In order to study the influence of fire smoke descent on safety of personnel evacuation in the extra-long highway tunnels,the smoke descent characteristics of tunnel fire under four different longitudinal ventilation wind velocities of 0 m/s,1 m/s,1.5 m/s,and critical wind velocity were studied by numerical simulation,and the influence of smoke descent on personnel evacuation under different wind velocities was analyzed.The results showed that the smoke descent phenomenon was more obvious without longitudinal wind.The smoke descent caused the uneven distribution of smoke temperature,and visibility,which terminated the personnel evacuation early.As the longitudinal wind velocity increased,the descent phenomenon still existed,but the smoke descent position was backward,and the influence on personnel evacuation was reduced.Under the longitudinal ventilation condition of 1.5 m/s,the smoke did not descend basically and maintained stratification within 500 m downstream of the fire source,and the smoke descent did not affect the personnel evacuation downstream of the fire at this time.In practical application,the ventilation with the stratified wind velocity of 1.5 m/s could be carried out at the beginning of fire,and after the evacuation of personnel downstream,the critical wind velocity could be applied to speed up the smoke exhaust.The results can provide reference for fire prevention and evacuation of extra-long highway tunnels.
Keywords:extra-long highway tunnel   smoke descent   longitudinal ventilation   personnel evacuation   numerical simulation
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