火灾下城际铁路隧道温度分布规律研究  

Study on temperature distribution law of railway tunnel fire

作　　者：帅卫红 

机构地区：[1]长沙市消防支队,湖南长沙410008

出　　处：《消防科学与技术》2017年第11期1524-1527,共4页Fire Science and Technology

摘　　要：结合某铁路隧道工程实例,采用数值模拟分析方法对火灾时隧道内部温度分布进行研究。设计6种工况,分析不同通风排烟方式及列车运行或停止情况下隧道的温度分布规律,得出不同工况下隧道拱顶、侧墙及隧道断面的最高温度分布规律,分析研究火灾对隧道结构的破坏情况。结果表明,隧道内的温度分布受列车运行速度的影响较为明显;当送风排烟速度不低于临界风速时,热烟气对隧道衬砌结构基本没有影响。Combined with a railway tunnel project, the temperature distribution in the tunnel fire was studied by numerical simulation. Six different scenarios were set, the temperature distribution law was analyzed under different smoke exhaustion methods and train operation conditions, the highest temperature distribution law at the top of the tunnel, at the side wall and around the cross section was obtained, and the fire damage on the structure of tunnel was analyzed. The results showed that the temperature distribution in the tunnel is obviously affected by the speed of the train;when the speed of air supply is not less than the critical wind speed, the heat smoke has little influence on the lining structcure of the tunnel.

关 键 词：铁路隧道 火灾 临界风速 温度分布 数值模拟 

分 类 号：X913.4[环境科学与工程—安全科学] U459.1[建筑科学—桥梁与隧道工程]