南宁地铁车站关键区域PM2.5浓度实测研究

作者:李严 谭庆慧 李晓锋 王旭 黄幸 李亮
单位:清华大学 南宁轨道交通集团有限公司
摘要:对处于运营初期的南宁地铁某地下屏蔽门车站的站台、站厅及区间隧道的PM2.5浓度进行了为期6个月的连续监测。测试结果表明:站厅、站台和隧道的PM2.5浓度不满足GB 3095—2012《环境空气质量标准》中二级浓度日均值的天数占比分别为3%、10%和23%;站厅、站台和隧道的PM2.5浓度变化趋势与室外PM2.5浓度呈极强的正相关性;大系统新风比对站厅、站台及隧道的PM2.5浓度的影响并不显著;站厅、站台和隧道的PM2.5浓度水平分别约为室外的0.9、1.1和1.5倍;隧道内的PM2.5浓度对室外PM2.5浓度的波动较为敏感,当室外浓度上升或降低时,隧道内的浓度则会迅速表现出更大幅度的上升或降低;客流量对站内PM2.5浓度有一定的影响。
关键词:地铁车站空气品质PM2.5浓度站厅站台隧道
作者简介:李严,女,1989年生,硕士研究生,工程师;*李晓锋(通信作者)100084北京市海淀区清华大学建筑学院建筑技术科学系,E-mail:xfli@tsinghua.edu.cn;
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Field measurement of PM2.5 concentrations in key areas of Nanning Metro station
Li Yan Tan Qinghui Li Xiaofeng Wang Xu Huang Xing Li Liang
(Tsinghua University Nanning Rail Transit Co., Ltd.)
Abstract: In this paper, the concentration of PM2.5 in the station hall, platform and interval tunnel of an underground station of Nanning Metro with platform screen door in the early stage of operation is continuously monitored for 6 months. The test results show that the number of days when the concentration of PM2.5 in the station hall, platform and tunnel does not meet the daily average of class Ⅱ concentration in the GB 3095-2012 Ambient air quality standards accounts for 3%, 10% and 23%, respectively. The variation trend of PM2.5 concentration in the station hall, platform and tunnel has a strong positive correlation with the outdoor PM2.5 concentration. The effect of the outdoor air ratio on the concentration of PM2.5 in the station hall, platform and tunnel is not significant. The concentration levels of PM2.5 in the station hall, platform and tunnel are about 0.9, 1.1 and 1.5 times that of outdoor, respectively. The PM2.5 concentration in the tunnel is sensitive to the fluctuation of outdoor PM2.5 concentration, and when the outdoor concentration increases or decreases, the PM2.5 concentration in the tunnel will quickly show a greater increase or decrease. The passenger flow has a certain impact on the PM2.5 concentration in the station.
Keywords: subway station; air quality; PM2.5 concentration; station hall; platform; tunnel;
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