摘要
为明确车辆排放污染物浓度[PM 2.5和挥发性有机化合物(volatile organic compounds,VOCs)]在山地城市隧道路段的分布特征,以重庆市内5条典型隧道为研究对象,采集了隧道洞内、洞口以及前后100 m范围内的空气污染物浓度值,分析PM 2.5与VOCs在隧道路段的连续分布特征,以及土地开发强度与时段差异等对污染物浓度的影响。结果表明:隧道中段的污染物浓度最高、隧道出口处的污染物浓度次之、隧道进口处的污染物浓度最低;隧道高峰期间污染物浓度比平峰期间污染物浓度波动大,并且高峰期间污染物浓度大于平峰期间的污染物浓度;污染物浓度在郊区隧道路段最低,在商圈外围隧道路段居中,在商圈中心隧道路段最高;5条隧道样本的通风效果普遍较差。建议优化隧道中段的通风装置,尤其是增加商圈中心隧道的风机密度,以改善加强隧道中段的通风效果、降低污染物浓度。。
To clarify the distribution characteristics of vehicle emission pollutant concentration(PM 2.5 and VOCs)in tunnels sections in mountainous cities,taking five typical tunnels in Chongqing as research objects.The concentration values of air pollutants in tunnels,tunnel portals,and around 100 m were collected.The continuous distribution characteristics of PM 2.5 and VOCs in tunnel sections,and the influence of land development intensity and time difference in pollutant concentration was analyzed.The main findings of this research include the following.The concentration of pollutants in the middle section of the tunnel is the highest,that at the exit of the tunnel is second,and that at the entrance into the tunnel is the lowest.The concentration of pollutants of the tunnel fluctuates greatly at rush hours than regular hours,and the concentration of pollutants at rush hours is greater than that at regular hours.The pollutant concentration is the lowest in the suburban tunnel section,the middle near the commercial circle,and the highest in the central section of the commercial circle.The ventilation effect of the five tunnels in this paper is generally weak.It is recommended to optimizing the ventilation in the middle section of tunnels,especially to increase the fan density of the central tunnel of the commercial circle,so that it can improve the ventilation effect and reduce the concentration of pollutants in the middle section of the tunnel.
作者
曾粤
冉福霞
徐进
ZENG Yue;RAN Fu-xia;XU Jin(College of Traffic and Transportation,Chongqing Jiaotong University,Chongqing 40071,China;Chongqing Key Laboratory of“Human-Vehicle-Road”Cooperation&Safety for Mountain Complex Environment,Chongqing 400074,China)
出处
《科学技术与工程》
北大核心
2019年第30期324-330,共7页
Science Technology and Engineering
基金
国家自然科学基金项目(51678099)资助
关键词
隧道
PM
2.5
挥发性有机化合物
分布特征
通风
tunnel
PM 2.5
volatile organic compounds
distribution characteristics
ventilation
作者简介
第一作者:曾粤(1996—),女,广东惠州人,硕士。研究方向:交通运输规划与管理、道路交通安全、道路交通环境影响。E-mail:286467673@qq.com;通信作者:徐进(1977—),男,吉林四平人,博士,教授。研究方向:公路路线设计理论与方法、人-车-路(环境)系统、交通环境影响以及驾驶行为。E-mail:yhnl_996699@163.com。
