摘要
为探明曲线型隧道最不利火灾位置,进而明确曲线型隧道防灾通风设计方法,分析曲线隧道典型火灾场景,研究曲线隧道火灾控制临界风速的影响因素,并总结曲线隧道防灾射流风机的配置方法。结果表明:建议按照曲线稳定段断面内侧发生火灾考虑曲线隧道防灾通风设计;曲线型隧道最不利火灾控制临界风速显著大于直线隧道,分别给出针对火灾位置、曲线半径及隧道坡度的火灾控制临界风速修正系数;曲线型隧道防灾射流风机数量显著大于直线隧道,明确火灾工况下曲线隧道防灾射流风机开启数量的计算方法。
In order to figure out the most-dangerous fire location and the disaster prevention design for curved tunnels,the typical fire scenarios,the factors affected critical velocity,as well as the disaster-prevention jet fan configuration of curved tunnels was discussed in this paper.The results showed that:The disaster prevention ventilation design for curved tunnelsshould be considered in case of the fire accident occurred at the convex wall in the steady stage of curve.The maximum critical velocity of curved tunnels was higher than that of the straight tunnel.Therefore,the correction coefficients on fire location,curve radius and tunnel slope for critical velocity of curved tunnelswere proposed respectively.Moreover,the number of operating jet fans for disaster preventionof curved tunnels was higher than that of the straight tunnel andthe calculation method for the number of operating jet fans for disaster prevention in curved tunnels was proposed.
作者
戴开来
王峰
DAI Kailai;WANG Feng(China Merchants Chongqing Communications Research&Design Institute Co.,Ltd.,Chongqing 400067,China;Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)
出处
《隧道与地下工程灾害防治》
2024年第2期76-83,共8页
Hazard Control in Tunnelling and Underground Engineering
基金
国家自然科学基金资助项目(52078429)
四川省交通运输科技资助项目(2019-ZL-12)
关键词
曲线隧道
防灾通风
火灾位置
临界风速
射流风机
curved tunnel
ventilation for disaster prevention
fire location
critical velocity
jet fan
