基于我国规范与PIARC标准的公路隧道需风量分析

以某长大高速公路隧道为例,结合我国隧道通风设计规范JTJ026.1-1999与PIARC2007标准(世界道路协会),针对不同行车速度,不同车辆更新情况、不同排放标准组合形式以及是否考虑NOx等情况,对各个不同工况的需风量分别进行计算,并从需风量计算方法、机动车排放量和污染物设计浓度三个方面对隧道需风量差异进行分析。研究结果表明:我国设计规范与PIARC2007存在较大差距,为了适应当前及今后我国交通量及机动车排放特点的发展趋势,我国现行规范应在机动车排放量、污染物设计浓度限值等方面做出必要改进以达到合理确定隧道需风量的目的。

ANALYSIS OF TUNNEL VENTILATION AIRFLOW REQUIREMENT BASED ON CHINA STANDARD AND PIARC STANDARD

On the basis of a long tunnel of a highway,this paper has worked out different airflow requirement in tunnel under various conditions—different driving speed;renewal of vehicles;different combination of motor vehicle emission standards,with or with out considering emission of NOx.From three aspects(airflow requirement calculation method,emission of motor vehicles,admissible concentrations of pollutants) this paper has made a comparative analysis between the results calculated according to domestic specifications JTJ026.1-1999 and PIARC2007.The research findings show that there still exists a huge gap between our specification and PIARC2007,and in order to keep pace with the development of current and future traffic volume and vehicle emission characteristics,domestic specifications should be modified and improved in terms of motor vehicle emissions,admissible concentrations of pollutants,so as to achieve the purpose of determining reasonable tunnel ventilation airflow requirement.