摘要
为探究火灾烟气在站台层的蔓延情况,基于长江埔站工程项目开展全尺寸隧道火灾实验,并利用火灾数值模拟软件定量评估侧向和底部通风口布局车站通风方式对不同火灾工况烟气蔓延的影响。结果表明:火灾烟气集中分布在2.8~3.8 m高度处,且火源正上方温升变化最为剧烈;侧向通风口布局在不同的火灾位置均表现出较好的烟气控制效果。热释放率直接影响烟气的数量和温度,进而影响烟气的扩散和沉降过程。侧向通风口布局在不同的热释放率情况下的通风效率和FED值均优于底部通风口布局。研究结果可为同类地铁站通风系统的设计和优化提供重要的理论依据。
The ventilation system of subway stations is crucial to ensure the safety and comfort of passengers and the normal operation of the station.Therefore,based on the Changjiangpu Station project,a full-scale tunnel fire experiment study was carried out to explore the spread of fire smoke on the platform floor,and a numerical fire simulation software was used to quantitatively evaluate the influence of ventilation conditions of the station with the layout of side and bottom vents on different fire conditions.The results show that the smoke is concentrated at the height of 2.8~3.8 m,with the most significant temperature rise occurring directly above the fire source.The layout of lateral vent shows better smoke control performance at various fire source locations.The heat release rate directly affects the quantity and temperature of the flue gas,and then affects the diffusion and settling process.The ventilation efficiency and FED value of the lateral vent layout are better than those of the bottom vent layout at different heat release rates.This study provides an important theoretical basis for the design and optimization of similar subway station ventilation system,and the research results are of great significance for improving subway station safety.
作者
封相
FENG Xiang(Municipal Engineering Co.,Ltd.of China Railway 18th Bureau Group,Tianjin 300350,China)
出处
《广东水利电力职业技术学院学报》
2025年第3期28-31,41,共5页
Journal of Guangdong Polytechnic of Water Resources and Electric Engineering
关键词
通风方式
火灾位置
热释放率
敏感性分析
ventilation performance
fire location
heat release rate
sensitivity analysis
