摘要
采用数值模拟方法获得隧道纵向通风排烟模式下的可用安全疏散时间,并与采用Togawa经验公式计算的所需安全疏散时间进行对比,以此判断人员疏散安全性,分析确定通风临界时间。结果表明:隧道纵向通风排烟下,通风开始时间对人员疏散安全性影响显著。通风开始时间早于180s人员疏散不安全;当火源功率不大于15MW时,通风开始时间不早于180s即可保证人员安全疏散,而火源功率大于15MW时,通风开始时间不早于180s且不晚于240s才能保证人员安全疏散;当纵向通风风速大于3m·s^(-1)时,通风开始时间不早于180s即可保证人员安全疏散,而纵向通风风速不大于3m·s^(-1)时,通风开始时间不早于180s且不晚于300s才能保证人员安全疏散。综合得出铁路隧道内列车发生火灾时通风临界时间为180s。
The available safe evacuation time under longitudinal ventilation and smoke exhaust mode in tunnel obtained by numerical simulation method was compared with the required safe evacuation time calculated by the empirical formula of Togawa to judge the safety of evacuation.The critical time of ventilation was analyzed and determined.Results show that the start time of ventilation has a significant impact on the safety of evacuation under longitudinal ventilation and smoke exhaust in tunnel.Personnel evacuation is not safe when the start time of ventilation is earlier than 180 s.If the heat release rate of fire source is not greater than 15 MW,the safe evacuation of personnel can be ensured when the start time of ventilation is not earlier than 180 s.But if the heat release rate of fire source is greater than 15 MW,the safe evacuation of personnel can be ensured only when the start time of ventilation is not as early as 180 s and is not later than 240 s.When the longitudinal ventilation velocity is greater than 3 m·s^-1,the safe evacuation of personnel can be ensured if the start time of ventilation is not earlier than 180 s.But when the longitudinal ventilation velocity is not greater than 3 m·s^-1,the safe evacuation of personnel can be ensured only if the start time of ventilation is not as early as 180 sand is not later than 300 s.It is comprehensively concluded that the critical time of ventilation during train fire in railway tunnel is 180 s.
作者
姜学鹏
张鹏
郭辉
JIANG Xuepeng;ZHANG Peng;GUO Hui(School of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Hubei Provincial Industrial Safety Engineering Technology Research Center,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Fire Safety Technology Institute,Wuhan University of Science and Technology,Wuhan Hubei 430081,China;Institute of Architecture and Urban Planning and Design,China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan Hubei 430063,China)
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2018年第4期101-106,共6页
China Railway Science
基金
公安部消防局科研计划项目(2016XFCX20)
冶金矿产资源高效利用与造块湖北省重点实验室开放基金资助项目(2017ZY004)
关键词
铁路隧道
列车火灾
通风排烟
通风临界时间
火灾救援
Railway tunnel
Train fire
Ventilation and smoke exhaust
Critical time of ventilation
Fire rescue
