水喷雾对隧道遮挡火灭火性能及顶棚温度的影响  

Influence of water spray on fire suppression performance and ceiling temperature of tunnel shelter fire

作　　者：杨涛[1] 余志华 王湛 李琴文 唐智[2,3] Yang Tao;Yu Zhihua;Wang Zhan;Li Qinwen;Tang Zhi(China Communication Second Highway Consultant Company,Hubei Wuhan 430056,China;School of Civil Engineering,Wuhan University,Hubei Wuhan 430072,China;Engineering Research Centre of Urban Disasters Prevention and Fire Rescue Technology of Hubei Province,Hubei Wuhan 430072,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,湖北武汉430056 [2]武汉大学土木建筑工程学院,湖北武汉430072 [3]湖北省城市综合防灾与消防救援工程技术研究中心,湖北武汉430072

出　　处：《消防科学与技术》2024年第9期1316-1321,1340,共7页Fire Science and Technology

基　　金：国家自然科学基金面上项目(52376122)。

摘　　要：水喷雾系统作为一种有效的火灾扑救设施,被广泛应用于隧道等场所中。本研究基于1:8的缩尺寸双层隧道火灾试验平台(36 m长、单层隧道净高0.58 m),在该模型的下层隧道空间内开展了水喷雾试验,探究了水喷雾系统工作压力、开启时间、喷淋区段和开启组数等因素对火灾控制效果的影响。研究结果表明,水雾与火焰作用过程中火焰强化和燃烧抑制作用共同存在,燃烧抑制作用随着水喷雾压力的增加而增强,喷水压强超过0.30 MPa后燃烧抑制起主导作用;火源熄灭时间随着水喷雾区段的增加而缩短;越早启动水喷雾系统,越能迅速有效地将火场温度控制在较低水平,较晚开启水喷雾,高温汽化产生大量水蒸气,对燃烧产生阻隔作用,减弱火势的增长,同时水喷雾区段作用范围对隧道火灾烟气温度分布具有显著影响。As an effective firefighting facility,water spray system is widely used in tunnels.Based on a 1:8 reduced scale double-layer tunnel platform(36 m long and a clear height of 0.58 m for each single-layer tunnel),this study carried out experiments in the lower deck space of the model and explored the effects of wa⁃ter spray system working pressure,opening time,spray section and number of opening sections on the fire control effect.Findings reveal a dual effect of water mist interaction with flames,with both enhancing flame intensity and inhibiting combustion,the lat⁃ter being more pronounced with higher water spray pressures.When the water spray pressure exceeds 0.30 MPa,fire suppres⁃sion becomes the dominant factor.The extinguishing time of fire source decreases with the increase of water spray sections.The earlier the water spray system is started,the more quickly and ef⁃fectively the fire temperature can be controlled at alower level,while delayed activation leads to high-temperature vaporization,hindering combustion and attenuating fire progression.Impor⁃tantly,the water spray sections have a significant influence on the temperature distribution in tunnel.

关 键 词：隧道火灾 水喷雾 开启时间 喷水压力 

分 类 号：X951[环境科学与工程—安全科学] U458.1[建筑科学—桥梁与隧道工程]