首页|成都地铁运营区间隧道颗粒物成分及浓度分析

成都地铁运营区间隧道颗粒物成分及浓度分析

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
地铁运营过程中在区间隧道产生的污染物会通过风亭排放到大气中,为了解地铁区间隧道颗粒物浓度分布、成分及形貌特征等,依托四川省成都市4个典型的地铁站,采用激光粉尘检测仪对4个站点的活塞风亭处颗粒物浓度进行现场测试,采集颗粒物样品进行扫描电镜和能谱分析确定颗粒物来源,并运用皮尔逊系数进行区间隧道与周围环境相关性分析.研究结果表明:地铁经过区间隧道产生的颗粒物形态多为球状、棱角状等,所含元素主要为Fe、Al、Ba、Zn等金属元素,其主要来源为地铁运行过程中轨道与车轮、制动器之间以及地铁车辆的受电弓与供电的接触网之间界面处的机械损耗和摩擦;PM10浓度远高于PM1及PM2.5浓度,且各粒径颗粒物浓度无明显关系;地铁区间隧道颗粒物浓度受季节影响较大,冬季产生的PM2.5、PM10浓度值高于其他季节,且PM10排放浓度超标;4个站点各PM指标的皮尔逊相关系数r均大于0.8,风亭处污染物浓度与周边环境大气污染程度高度线性相关.
Analysis of the Composition and Concentration of Particulate Matters in Chengdu Operational Metro Running Tunnels
During metro train operation,the pollutants generated in the running tunnels will be emitted into the at-mosphere through ventilation pavilions.To understand the concentration distribution,composition,and morphologi-cal characteristics of particulate matters in metro running tunnels,a study was conducted based on four typical met-ro stations in Chengdu,Sichuan Province.The laser dust detector was used for on-site testing of particulate matter concentrations at the piston wind pavilions of the four stations.Particulate matter samples were collected for scan-ning electron microscopy(SEM)and energy dispersive spectroscopy(EDS)analysis to determine their sources.Pear-son correlation coefficients were used to analyze the relationship between the running tunnel and ambient environ-mental conditions.The results show that the particulate matters generated by the train passing through metro run-ning tunnels are mostly spherical or angular and so on,with elemental contents mainly consisting of metals such as Fe,Al,Ba,and Zn.These particles primarily originate from mechanical wear and friction at the interfaces between tracks and wheels,brakes,and the contact points between the pantograph and catenary during metro train operation.The concentration of PM10 is much higher than that of PM1 and PM2.5,with no significant correlation between the con-centrations of particulate matters with different particle sizes.The particulate matter concentration in metro running tunnels is significantly influenced by the season,with PM2.5 and PM10 levels higher in winter than in other seasons,and PM10 emissions exceeding the standard limits.The Pearson correlation coefficients r for PM indicators at the four stations are all greater than 0.8,indicating a high linear correlation between the pollutant concentrations at the ventilation pavilions and the air pollution levels in surrounding environment.

Chengdu MetroOperational running tunnelsPiston wind pavilionInhalable particulate matterCompo-sition analysis

赵树磊、张科、董晨、陈政、郭春

展开 >

西南交通大学土木工程学院,成都 610031

西南交通大学交通隧道工程教育部重点实验室,成都 610031

遂宁市水利局,遂宁 628017

西南交通大学交通运输学院,成都 610031

展开 >

成都地铁 区间隧道 活塞风亭 可吸入颗粒物 成分分析

四川省社会科学基金规划项目四川省教育科研资助金项目四川省交通运输科技项目成都医学院四川应用心理学研究中心项目

SC22B031SCJG20A1202021-ZL-04CSXL-23327

2024

10.13807/j.cnki.mtt.2024.04.024

现代隧道技术
中铁西南科学研究院有限公司 中国土木工程学会隧道及地下工程分会

现代隧道技术

CSTPCD北大核心
影响因子：1.493
ISSN：1009-6582
年,卷(期)：2024.61(4)
  • 9