地铁公共区正压送风临界风速分析  

Critical wind speed analysis of positive pressure air supply in the public areas of metro station

作　　者：周岚[1] 

机构地区：[1]湖南省消防总队,湖南长沙410205

出　　处：《消防科学与技术》2012年第7期719-722,共4页Fire Science and Technology

摘　　要：对地铁站台站厅公共区楼扶梯口正压送风挡烟临界风速进行了理论分析和数值模拟研究。结果表明,公共区正压送风挡烟临界风速会受到地铁站的空间结构及火灾多样化等诸多因素的影响;规范要求的公共区楼扶梯口1.5m/s的正压送风挡烟风速只能阻挡站台2.8MW火灾烟气不向站厅蔓延。考虑最不利情况,建议地铁站台站厅公共区楼扶梯口正压送风挡烟风速不应小于1.8m/s。Theoretical analysis and numerical simulation were made about critical wind speed of positive pressure air supply and smoke control in the Stairs and escalators mouth of the public areas of metro station＇s platform and hall. The results show that the critical wind speed will be subject to many fac tors, such as the spatial structure of the subway station and the diversification of fire; 1.5 m/s required by the specification can onl.y prevent the smoke produced by fire of 2. 8 MW from spreading to the station hall, and the wind speed should not be less than 1.8 m/s for effective and most dangerous state.

关 键 词：地铁站台 火灾 正压送风 临界风速 

分 类 号：X924.4[环境科学与工程—安全科学] U231.4[交通运输工程—道路与铁道工程]