秦岭特长公路隧道群通风设计

高等级公路上的特长隧道，由于车辆密度大。在隧道运行时排出废气多，影响隧道中空气质量。如不采用良好的通风设备，以新鲜空气置换隧道内的污染空气，将会影响司乘人员健康，同时汽车行驶在隧道内会散发出烟雾，掀起粉尘。降低隧道内能见度，不利于行车安全。尤其是在隧道内因交通事故而塞车时，甚至发生火灾的特殊情况下，通风就显得越发重要。而特长公路隧道通风方式的确定是通风设计中的关键，它依赖于诸如交通量、气流速度、废气标准等复杂因素。GZ40秦岭特长公路隧道群单洞长34079m，本文结合秦岭特长公路隧道群的工程实际情况，对运营通风进行了技术设计，并对特长公路隧道通风设计提出了新的看法和认识。

Design of Ventilation System of Extra-long Highway Tunnels Through Qinling Ridge

Due to heavy traffic volume,vehicles passing through the extra-long highway tunnels on high-grade highways cause more exhaust gases which affect the quality of air in the tunnel than usual. If the proper ventilation equipments are not taken, and the polluted air of the tunnel is not replaced by fresh air, it would do great harm to the health of drivers and passengers. At the same time, without proper ventilation equipments,the vehicles would give off smog, surge dust and reduce the visibility, which directly endanger the safety of driving. In some special cases, such as traffic jam caused by car accident orfire disaster, the ventilation appears far more significant to the extra-long highway tunnel design. The determination of the ventilation patterns of extra-long highway tunnels is the key to ventilation design. It depends on some complicated factors, such as the volume of traffic, the speed of airflow, and the exhaust gas criterion etc.On the national major artery GZ40, the one-way tunnels of the extra-long highway tunnel group through Qinling Ridge add up to 34.08 km.The ventilation system based on the factual construction situation is designed in this paper. It presents some new ideas and understandings as to the extra-long highway tunnel ventilation design .