Atmospheric Environmental Impact Assessment In The Service Period Of The Municipal Road Projects Involved A Tunnel

With the domestic car ownership gradually increasing, the demand for municipal road infrastructure enlarges, municipal road gradually develop from plane to three-dimensional transportation, city viaduct, overpass and tunnel constantly reflect in the municipal road construction, municipal road atmospheric pollutants involving the tunnel form concentrated emission source in tunnel inlet and exhaust outlet, which are remarkably different from other disposition ways. Therefore, more and more scholars are paying attention to the influence of municipal road pollutants. It has important theoretical value and practical significance of research on the municipal road project involving atmospheric effects.This paper takes Dazhou phoenix mountain tunnel project as an example, investigating the distribution of air sensitive points for the environment along Dazhou phoenix mountain tunnel project,by using AERMOD model and combined with CFD model constructed the tunnel intensity,this paper predicted and evaluated the atmospheric environmental impact during the operation period from Dazhou phoenix mountain tunnel project,putted forward the corresponding atmospheric prevention measures,and analyzed the feasibility of the measures. Research results can provide Dazhou phoenix mountain tunnel project operating period for the control of air pollution, and can offer reference for the similar project of atmospheric environmental impact assessment.This paper has shown that:The tunnel atmospheric environmental impact prediction and evaluation:the concentration of CO in Dazhou phoenix mountain tunnel project section reaches the standard requirements for the design of highway tunnel ventilation and lighting specification; in the near, middle and forward operation period, CO and NO2 hourly, daily and annual average maximum ground level concentration overlaying the background value of all sensitive, Phoenix village and Lotus lake district planning zone on both sides of the project can meet the secondary standard requirements of the environment air quality standard (GB3095-2012).The impact of the project on the regional atmospheric environment is acceptable.