青岛胶州湾海底公路隧道污染物浓度水平测试

Field Measurement of Contaminant Concentration in Underwater Road Tunnel

基于胶州湾隧道内车流量统计分析,对该隧道内四种空气污染物(PM2.5、甲醛、TVOC、CO)浓度水平进行测试。根据以上数据,分析污染物变化规律、超标情况及影响因素,并与其他隧道的污染物浓度进行了对比。结果表明:隧道内车流量具有日周期性驼峰。隧道内PM2.5浓度严重污染,测试浓度受隧道外背景浓度影响很大。TVOC浓度变化与车流量变化曲线有较明显的相关性,其他污染物与车流量变化曲线相关性不明显。冬季隧道空气中甲醛、TVOC、CO浓度随空气流动距离增加而增大,且CO浓度远低于控制标准,可不作为隧道通风的控制指标。

Based on the statistical analysis of traffic flow in Jiaozhou Bay Tunnel,the concentration of air pollutants(PM2.5,formaldehyde,TVOC,CO)in the tunnel was tested.Based on the above data,the law of pollutant change,the over-standard condition and the influencing factors were analyzed.It was compared with the concentration of pollutants in other tunnels.The results show that:The traffic flow in the tunnel has a daily periodic hump;PM2.5 pollution in the tunnel was serious,and its concentration was greatly affected by the background concentration outside the tunnel;The TVOC concentration change had a significant correlation with the traffic flow curve,and the correlation between other pollutants and the traffic flow curve was not obvious;The concentration of formaldehyde,TVOC and CO in winter increased with air flow distance,and the CO concentration is far below the control standard,which can not be used as the control index of tunnel ventilation.