Study on Dust Distribution in Tunnel at Different Construction Stages
During the tunnel construction process,the construction procedures are cumbersome,and the construction environment is relatively closed,resulting in extremely high dust content produced during the construction of the tunnel,making it difficult for construction workers to take effective protective measures.Therefore,clarifying the composition characteristics and distribution patterns of dust in tunnel construction has become an important issue to be urgently studied.This article takes this as the main research object,arranges 12 measuring points along the tunnel depth,and explores the formation and distribution patterns of dust in three main construction stages of tunnel construction—excavation of the working face,initial support,and secondary lining.It then proposes corresponding measures for tunnel dust control and workers'protection.The study finds that the main dust produced during the tunnel construction process includes PM2.5,PM10,PM1,PM4,and TSP.It is found that during the excavation of the working face and the initial support stage,the dust concentration increases with the increase in tunnel depth;while in the secondary lining stage,the dust concentration first decreases and then increases with the increase in depth.This research provides a reference for the study of the basic composition and distribution patterns of dust in the construction of inclined shaft tunnels and also offers a theoretical reference for solving the physical health problems of workers during construction.
万方数据
维普
