高原地区隧道施工作业环境卫生标准研究

Research on environmental health standard of tunnel construction in plateau

由于目前国内外在高原地区隧道施工中,对有害气体的允许浓度没有制定相应规范,通过研究国内外隧道施工作业环境标准,对国内类似行业标准中关于限定气体种类、有害气体的允许浓度和国内外CO、NO2最高允许浓度的比较,以及对防尘、氧含量、隧道内的温度、供风、烟雾浓度等标准的分析,得知国内控制标准最为严格.结合目前国内实际情况,提出了高原隧道施工作业环境标准的建议值(包括稀释气体通风量).

In the light of construction of tunnels in plateau region,the corresponding regulations on allowable concentration of harmful gas have not been established home and abroad.The paper explores the standards of some industries about the sorts of gas,allowable concentration of harmful gas,maximum allowable concentration of CO and NO2,dust prevention,oxygen content,inner temperature of tunnels,air supply and smog concentration.It concludes that,compared with other countries,the environmental standards in China are the strictest.Based on the present domestic practice,the paper gives suggested value（including diluting gas） of environmental standard about tunnel construction in plateau regions.