Research on the Characteristics and Influencing Factors of Dust Diffusion from Highway Construction Sites in Guanzhong Region

Abstract

To reveal the diffusion patterns of dust generated by vehicles during highway construction in the Guanzhong region, this paper, based on a highway construction project in the Guanzhong region, systematically studied the spatiotemporal distribution characteristics of line-source dust under different vehicle speeds using on-site monitoring methods. The results show that the dust concentration generated by construction vehicles increases significantly with increasing vehicle speed, and the peak concentrations of PM2.5 and PM10 are positively correlated with vehicle speed. Dust diffusion exhibits obvious spatiotemporal attenuation characteristics, with high peak concentrations and rapid attenuation at nearby monitoring points. Due to the influence of meteorological conditions in the Guanzhong region, dust is mainly concentrated within a 50m downwind radius. This research can provide a scientific basis for the precise control of dust during highway construction.