公路隧道可吸入颗粒物扩散模型研究

运用大气扩散理论,得到了隧道内自然通风和纵向通风状态下的可吸入颗粒物(PM10)扩散模型,并由隧道口PM10浓度、隧道截面积、隧道内风速,以及车流量和类型等参数,获得了整条隧道内的不同PM10浓度分布.模型表明,随着隧道深度的增加,PM10浓度逐渐增大.通过采用纵向通风的玄武湖隧道各参数,得到了3组不同条件下的PM10扩散模型,并用所得模型计算了隧道内不同深度处PM10的浓度.沿隧道不同深度测得的PM10浓度值的比较结果表明,实际测定值围绕计算值上下波动,两者之间具有良好的一致性.

Research on DiffusionM odelofPM 10 Concentration forH ighway Tunnel

The PM10 diffusion model was obtained under the condition of nature and longitudinal ventilation according to atmospheric diffusion theory. The distribution of PM10 concentration was described in virtue of the parameters such as PM10 concentration of entrance, the section of tunnel, wind speed in tunnel, traffic flow and types of vehicle etc. The result showed the longer of the tunnel, the higher of PM10 concentration. The three groups of PM10 diffusion models under different conditions were established with Lengthwise parameters of Nanjing Xuanwu lake tunnel for calculating PM10 concentration in each length of the tunnel. It was found that calculating data were moving around actually detective data closely.