冬季地铁隧道空气中颗粒物体积质量分布及相关性分析

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

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。

Particulate matter(PM)concentration in tunnel hashuge effect on the quality of air in metro carriage,because freshair comes from tunnel when train is running underground,butcurrent research on PM concentration in metro system is veryrare in the world.By field testing,the concentration data ofPM with various sizes in metro tunnel are obtained,the correlationof different particle sizes is analyzed,the high degree ofwhich indicates the same source.The research shows that tinyparticle is the main components of tunnel PM,and PM distributionbetween different particle sizes has a high correlation intunnel and metro train,but has moderate correlation outside thestation.PM distribution between tunnel,metro train and the airoutside station also has a higher correlation with the same particle size.