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本文针对城市竖井型自然通风公路隧道,采用理论与实验相结合的手段,研究建立了全长隧道气流与污染物分布的数学模型。运用该模型,分类研究了不同竖井间距、竖井截面尺寸、交通量、车速和主体长度工况下,隧道内气流与污染物的分布状况。得出了在浅埋竖井型市政公路隧道的修建与运营过程中,降低主体长度与提高车速可有效改善污染物浓度的分布状况。
In this paper, aiming at the urban vertical shaft natural ventilation tunnel, the mathematical model of the distribution of air flow and pollutants in the full length tunnel is established by the combination of theory and experiment. By using this model, the distribution of air flow and pollutants in the tunnel under different conditions of shaft spacing, shaft cross-section size, traffic volume, vehicle speed and body length were studied. It is concluded that the distribution of pollutant concentration can be effectively reduced by reducing the length of the main body and increasing the speed of the vehicle during the construction and operation of a shallow shaft-type municipal highway tunnel.