Dust dispersion patterns during building construction processes: A multi-process simulation study

Xin Song

doi:10.1016/j.jobe.2023.107478

2023-10-01

PRE

DOI：10.1016/j.jobe.2023.107478

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摘要

En 中文

Dust, an inevitable by-product of the building construction process, poses significant hazards to both the residential environment and the health of construction workers. This study investigates the dispersion pattern of dust during core construction operations such as cutting, grinding, and drilling inside the building. A residential construction project on Chaoyang West Road in Huangdao District served as a model, and Ansys Fluent simulation software was used to predict dust transportation from multiple sources under varying wind directions and speeds. The results reveal that dust dispersion is most pronounced in the southeast wind direction, with concentra-tion levels ranging from 9 to 15 mg/m3 and dispersion time extending up to 40 s. This finding indicates that the southeast wind direction significantly influences dust dispersion within the building structure. Examination of dust dispersion under different wind conditions shows that dust concentration at different heights in an open environment decreases markedly with increasing height. An in-depth analysis of the concentration curves at different heights and wind speeds within the primary pollution area, where the southeast wind is dominant, shows fluctu-ations in dust concentration at three heights under wind speeds of 5 m/s and 15 m/s; the dust concentration at these heights under a wind speed of 10 m/s exhibited a more pronounced downward trend. Compared with similar simulations studying construction dust dispersion, this study analyses the dust dispersion patterns in a variety of environments and accurately restores the transport patterns of dust from construction sites. The dust dispersion patterns deduced from the simulation provide crucial theoretical insights for effective dust management in the con-struction industry.

Keyword:

Numerical simulation

Building construction sites

Dust dispersion

Occupational health