公路隧道环境二氧化碳的运移机理及计算方法研究

Study on Diffusion Mechanism and Calculation Method of Environmental Carbon Dioxide in Highway Tunnel

隧道内外环境参数差异较大,以普通大气环境CO_(2)浓度进行隧道衬砌碳化耐久性设计存在明显不足。针对隧道特殊运营环境,以公路隧道环境CO_(2)作为研究对象,基于公路隧道机动车污染物扩散理论,分析了隧道环境CO_(2)浓度影响因素和扩散规律,建立了公路隧道中CO_(2)的对流扩散模型,给出了一种纵向通风隧道CO_(2)浓度的计算方法,并进行了实例验证。

Due to the large differences of environmental parameters inside and outside the tunnel,there are obvious deficiencies in the carbonation durability design of tunnel lining based on the CO_(2) concentration of ordinary atmospheric environment.Aiming at the special operating environment of tunnel,based on the theory of vehicle pollutant diffusion in highway tunnel,this paper takes the CO_(2) in highway tunnel environment as the research object,and analyzes the influencing factors and diffusion laws of CO_(2) concentration in tunnel environment.The convection diffusion model of CO_(2) in highway tunnel is established,and a calculation method of CO_(2) concentration in longitudinal ventilation tunnel is given.Finally,this paper is verified by an example.