北方城市某地铁站内颗粒物浓度分布实测和分析
Measurement and analysis of particle concentration distribution in a subway station in northern cities
摘要：
对北方城市某一屏蔽门系统地铁站内的颗粒物浓度进行了测试，测试区域包括工作区的会议室及办公室和公共区的站台，所测颗粒物包括总悬浮颗粒物（TSP）、可吸入颗粒物（PM10）和细颗粒物（PM2.5），分析了不同区域颗粒物的浓度水平、变化特点和粒径分布。结果表明：工作区室内的颗粒物浓度低于室外，且受室外影响较大，但几乎不受公共区的影响；站台上颗粒物浓度高于室外，且受到活塞风的影响是轻微的；站台和工作区室内PM2.5/PM10的值非常接近，在0.7~0.8之间，但工作区室内PM10/TSP（0.25和0.15）的值远低于站台（0.80），这说明地铁站公共区和工作区需要针对主要粒径颗粒物分别制定不同的改善措施。
Abstract：
This paper measures the particle concentration in a subway station with a screen door system in a northern city. The test area includes meeting rooms and offices in the working area and platforms in public areas, and the measured particle includes total suspended particulates (TSP), inhalable particle (PM10) and fine particulate matter (PM2.5). The concentration levels, variation characteristics, and size distribution of particle in different regions are analysed. The results show that the concentration of indoor particle in the working area is lower than that in the outdoor area, and it is greatly influenced by the outdoor area, but it is hardly influenced by the public area. The particle concentration on the platform is higher than that outside, and it is slightly affected by piston wind. The values of PM2.5/PM10 in the platform and the working area are very close, ranging from 0.7 to 0.8, but the values of PM10/TSP in the working area (0.25 and 0.15) are much lower than that in the platform (0.80). This shows that different mitigation measures for the main particle size need to be formulated for the public area and working area of the subway.
Keywords:subway station; platform; working area; particle; concentration change; particle size distribution