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为研究隧道环境中氮氧化物对隧道通风的影响,根据不同国家隧道通风环境标准,综合考虑车型、汽车质量、海拔、车龄等影响因素,结合PIARC的相关标准和计算模型,以港珠澳大桥海底隧道工程为例,得出稀释氮氧化物的需风量,并与稀释一氧化碳及烟雾需风量进行对比分析。研究结果表明,氮氧化物中转化为二氧化氮的部分对隧道需风量影响较大,与稀释一氧化碳及烟雾需风量比较,稀释氮氧化物的需风量为控制值。
In order to study the influence of nitrogen oxides on tunnel ventilation in tunnel environment, according to the tunnel ventilation environment standards of different countries, taking into consideration the influencing factors such as vehicle type, vehicle quality, altitude and vehicle age, combined with the relevant standards and calculation models of PIARC, Bridge Cross Harbor Tunnel project as an example, draw the amount of nitrogen oxide to be diluted, and compared with the diluted carbon monoxide and smoke required air volume comparative analysis. The results show that the portion of nitrogen oxides converted into nitrogen dioxide has a significant impact on the amount of air required for tunnels. Compared with the required amount of carbon monoxide and smoke required for dilution, the amount of air required for dilution of nitrogen oxides is the control value.