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新的公路隧道通风设计细则于2014年7月颁布,与上一规范相隔15年之久,在CO排放基数、CO要求浓度等方面发生了巨大变化,在隧道通风设计方面,直接影响设计需风量的变化。总结了新旧规范主要差异之处,并就设计阶段通风量计算与运营阶段的通风管理工作变化展开影响性分析。选取了1km、2km、3km、4km、5km等5条山区高速公路隧道,假定其通风方式均为纵向式通风,并且其他条件一致,分别计算新旧规范下对应的设计需风量。计算表明,新规范下长度小于3km的长隧道需风量增幅较大;长度为3km的隧道设计需风量几乎不变;长度在3~5km的隧道需风量明显减少。
The new Road Tunnel Ventilation Design Regulations were promulgated in July 2014, 15 years after the previous one, which has undergone tremendous changes in terms of the CO emission baseline and the required concentration of CO. In terms of tunnel ventilation design, it has a direct impact on the amount of air required to be designed The change. Summarizes the main differences between the old and the new norms, and analyzes the changes of the ventilation management in the calculation and operation stages of ventilation during the design stage. Five mountain highway tunnels, such as 1km, 2km, 3km, 4km and 5km, are selected for tunnels. If the ventilation modes are vertical ventilation and the other conditions are the same, calculate the corresponding design wind volume under the old and new codes respectively. The calculated results show that the required air volume of long tunnel less than 3km in the new code increases greatly; the required air volume of the tunnel with the length of 3km is almost unchanged; the required air volume of the tunnel with the length of 3 ~ 5km decreases obviously.