冬季地铁隧道空气中颗粒物体积质量分布及相关性分析

列车在地下运行时,新风从隧道内引入,因而隧道内空气颗粒物的体积质量会严重影响列车车厢内空气的质量,而目前国内外对地铁隧道内空气中颗粒物的研究非常少。采用实地测试的方法,获取了地铁隧道内空气中各粒径颗粒物的体积质量数据,并分析了各粒径颗粒物体积质量的相关性,相关程度高则说明来自同一个来源。结果表明,地铁隧道内空气中颗粒物的粒径分布中,细小颗粒占了主要成分;不同粒径颗粒物体积质量之间高度相关,列车车厢内空气中不同粒径颗粒物体积质量之间高度相关,车站站外空气中不同粒径颗粒物体积质量之间中度相关;隧道内、列车车厢内、车站站外空气中的同种粒径颗粒物体积质量之间也高度相关。

Distribution of Particulate Matter Concentration in Metro Tunnel during the Winter and Correlation Analysis

Particulate matter (PM) concentration in tunnel has huge effect on the quality of air in metro carriage,because fresh air comes from tunnel when train is running underground,but current research on PM concentration in metro system is very rare in the world.By field testing,the concentration data of PM with various sizes in metro tunnel are obtained,the corre lation of different particle sizes is analyzed,the high degree of which indicates the same source.The research shows that tiny particle is the main components of tunnel PM,and PM distribution between different particle sizes has a high correlation in tunnel and metro train,but has moderate correlation outside the station.PM distribution between tunnel,metro train and the air outside station also has a higher correlation with the same particle size.