北方城市某地鐵站內顆粒物濃度分布實測和分析
Measurement and analysis of particle concentration distribution in a subway station in northern cities
摘要：
對北方城市某一屏蔽門系統地鐵站內的顆粒物濃度進行了測試，測試區域包括工作區的會議室及辦公室和公共區的站臺，所測顆粒物包括總懸浮顆粒物（TSP）、可吸入顆粒物（PM10）和細顆粒物（PM2.5），分析了不同區域顆粒物的濃度水平、變化特點和粒徑分布。結果表明：工作區室內的顆粒物濃度低于室外，且受室外影響較大，但幾乎不受公共區的影響；站臺上顆粒物濃度高于室外，且受到活塞風的影響是輕微的；站臺和工作區室內PM2.5/PM10的值非常接近，在0.7~0.8之間，但工作區室內PM10/TSP（0.25和0.15）的值遠低于站臺（0.80），這說明地鐵站公共區和工作區需要針對主要粒徑顆粒物分別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:subwaystation;platform;workingarea;particle;concentrationchange;particlesizedistribution