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为了优化公路隧道自然开口及射流风机的位置,实现降低隧道建设成本、节约能源和减少环境影响的目的,以开设自然开口的公路隧道分段式纵向通风方式为研究对象,通过建立公路隧道的通风数学模型,研究自然开口和射流风机的布置位置对隧道C0浓度分布的影响。研究表明:设置自然开口后,隧道内污染物浓度分布情况并非一定优于不布置自然开口;在多自然开口通风方案中,将距离隧道出口较近的自然开口作为排风自然开口可提高分污效果;将自然开口集中布置在隧道后部,同时将较多的射流风机布置在自然开口群后端,可增大隧道出口的实际通风量并降低隧道出口污染物浓度。
In order to optimize the natural opening of the tunnel and the position of the jet fan and achieve the purpose of reducing the construction cost of the tunnel, saving energy and reducing the environmental impact, the vertical ventilation of the highway tunnel with the natural opening is taken as the research object. Mathematical model to study the influence of natural openings and the placement of jet fans on the C0 concentration distribution in the tunnel. The results show that the distribution of pollutants in the tunnel is not necessarily better than that of the natural opening when the natural opening is set up. In natural ventilation with multiple openings, the natural opening closer to the exit of the tunnel can be used as the natural opening of the exhaust to improve the pollutant concentration The natural openings are arranged at the back of the tunnel, and more jet fans are arranged at the rear end of the natural opening group, which increases the actual ventilation volume at the exit of the tunnel and reduces the pollutant concentration at the exit of the tunnel.