中长公路隧道纵向通风计算模型

Vertical ventilation calculating model for mid-long highway tunnels

运用微分算子法,分析了中长公路隧道中的有害气体浓度的分布规律。以人体安全指标、隧道长度、交通量为主要依据,讨论了中长公路隧道是否需要机械通风的标准,建立了中长公路隧道纵向通风计算模型,并应用工程实例进行验证。结果表明:在近期,该隧道不需要通风;在远期,该隧道需要通风。所提出的计算模型为今后的中长公路隧道通风设计计算提供了参考。图1,参9。

Differential operator is applied in this thesis to analyze the distribution regularity of the harmful gas density in the highway tunnels. Based mainly on the safe index to human body, the tunnel length and the volume of traffic, the discussion about whether the mid-long road tunnels need mechanic ventilation or not is held in this thesis, and the vertical ventilation calculating mode for the mid-long highway tunnels is established as well, which has been tested in practical projects. The conclusion makes it clear that the tunnel needs no ventilation in the near phase and it needs to be ventilated at a specified future period. The theory obtained in this thesis provides valuable reference for future vertical ventilation designing and calculating of the mid-long highway tunnels.1fig. ,9refs.