【摘要】 目前，由于隧道施工通风中未能充分考虑出渣工序下的实际污染物排放，因此极大地增加了隧道施工需风量，造成巨大能源浪费。依托某隧道开展了CO浓度及风速现场测试，研究了不同工序下CO浓度随时间的变化规律，分析了工程车辆排放及风机供风量对隧道CO浓度与风速分布的影响。结果表明：爆破阶段掌子面CO浓度在爆破后25 min内基本不变，约为190 mg/m~3;出渣阶段掌子面CO浓度呈线性降低，通风90 min后达到规范限值(30 mg/m~3);出渣阶段隧道施工实际所需风量远小于规范要求，随需风量增大回风段CO浓度呈指数衰减，提出了CO排放量及需风量耦合影响下公路隧道施工通风CO比浓度经验计算公式。更多还原

【Abstract】 At present, the actual pollutant emissions under slag removal stage have not been fully considered in the ventilation of tunnel construction, greatly increasing the required air volume for tunnel construction and causing huge energy waste. On-site testing of CO concentration and wind speed was conducted based on a certain tunnel, the changes in CO concentration over time under different processes were studied, and the effects of engineering vehicle emissions and fan air supply on the distribution of CO concentration and wind speed in the tunnel were analyzed. The results show that: The CO concentration on the palm face remained basically unchanged within 25 minutes after blasting, about 200 mg/m~3; During the slag removal stage, the CO concentration on the palm surface decreases linearly and reaches the standard limit(30 mg/m~3) after 90 minutes of ventilation; The actual required air volume for tunnel construction during the slag removal stage is much lower than the standard requirements. As the supply air volume increases, the CO concentration in the return air section decreases exponentially. Based on the research results, an empirical calculation formula for CO concentration in highway tunnel construction ventilation is proposed, which takes into account the coupling effects of CO emissions and supply air volume.更多还原