地铁出入口排烟方案分析

为研究地铁车站出入口排烟的合理方案，通过大量工程实例，根据机房位置的不同将地铁出入口排烟设计方案分为5类，从气流组织、土建影响、排烟效果等方面对在车站大系统机房设置排烟风机、在地下通道旁边设置排烟机房、结合出入口设置地面排烟机房、出入口通道顶部设置土建夹层作为排烟机房、在地面出入口屋顶设置排烟风机等5类方案的优缺点进行分析，并对高度超过10 m的多级提升出入口防烟方案进行设计，得出不同情况下建议采取的最佳排烟方案，以期为地铁车站出入口排烟方案的设计提供参考。

Analysis of Smoke Exhaust Scheme for Entrance and Exit of Metro Station

In this paper, a number of practices of smoke exhaust scheme for entrance and exit of metro station are introduced; the smoke exhaust scheme for entrance and exit of metro station is divided into 5 kinds; advantages and disadvantages of the schemes, i.e. the smoke exhaust fan set at station system room, smoke exhaust machine room set beside underground passageway, smoke exhaust machine room set on ground connected with entrance and exit, smoke exhaust machine room set on top of entrance and exit, and smoke exhaust fan set on top of entrance and exit, are analyzed in terms of air organization, environment influence and smoke exhaust effect, etc. The smoke prevention schemes for multi stage lifting entrance and exit with height larger than 10 m are designed. Optimal smoke exhause schemes are obtained for several situations. The results can provide reference for smoke exhaust scheme design for entrance and exit of metro station.