疫情条件下地铁站台污染物分布规律研究

Study on the Distribution of Pollutants on Subway Platforms under Epidemic Conditions

随着复工复产的全面推进,我国已迈入疫情常态化阶段,研究地铁站台候车乘客产生的气体污染物分布特征对防疫指导工作有重要意义。根据土建资料对深圳某地铁站站台公共区的送排风系统进行数值建模,研究站台污染物的分布规律并对地铁站台防疫措施提出建议。研究结果表明:在站台乘客分布均匀的情况下,排风口侧的污染物浓度整体高于送风口侧;站台端和站台中央的污染物浓度相比其他区域更高;位于吊顶内的排风口无法有效及时的排出站内污染物;站台不同位置污染源产生的污染物影响范围有限,且易积累程度也存在显著差异。

With the full progress of the resumption of work and production,China has entered the stage of normalization of the epidemic.The study of the distribution characteristics of gas pollutants produced by waiting passengers on subway platforms is of great significance to the guidance of epidemic prevention.Based on the civil engineering data,the air supply and exhaust system in the public area of a subway station in Shenzhen was numerically modeled,the distribution of pollutants on the platform was studied,and the subway platform epidemic prevention measures were put forward.The research results show that:when passengers are evenly distributed on the platform,the concentration of pollutants on the air outlet side is higher than that on the air inlet side;the concentration of pollutants at the end of the platform and the center of the platform is higher than in other areas;the exhaust vents in the ceiling cannot effectively and timely discharge the pollutants in the station;pollution sources at different locations have a limited impact range of pollutants,and the degree of accumulation is also different.