道路施工扬尘飘移扩散特性

Dust Drifting and Diffusion During Road Engineering Construction

目前扬尘污染已成为我国城市大气污染的主要污染物,为遏制扬尘污染,改善空气质量,应研究扬尘在风载下的扩散规律。本研究基于弹道轨迹理论,分析了有风条件下扬尘扩散理论计算方法。在求解过程中,采用四阶龙格库塔法求解风载下扬尘在空气中的运动。在此基础上,通过计算不同风速条件下不同粒径大小的扬尘在空气中的飘移扩散距离,为分析影响扬尘扩散因素提供依据。

Dust pollution has become the main source of particulate matter pollution in most cities,and the characteristic of the dust diffusion should be analyzed during controlling dust pollution of road engineering construction. In this research,trajectory theory was applied to study dust diffusion at windy condition,and Runge-Kutta method was used to solve movement of landed dust. On this basis,the routing distances of dust with different wind velocities and particle diameters were calculated,which could provide a guidance of dedusting during road engineering construction.