摘要
为解决当前相关规范对空气质量要求的局限性,以及对高海拔低气压地区特定环境的不适用性,结合关角隧道地处高海拔低气压地区的特点,对关角隧道施工环境的空气质量进行分析,说明高海拔低气压地区空气环境的物理特性与普通地区的不同之处,提出补充和修正规范的主要建议:各种气体体积分数限值按照不同海拔给出合理的限值界定;氧气质量浓度不准低于224 g/m3。
The limits on air quality specified in the relevant standards are not applicable to cases in high altitude and low atmospheric pressure areas,where Guanjiao tunnel is located.The authors analyze the air quality in the working area of Guanjiao tunnel and illustrates the difference between the physical characteristics of the air environment in high altitude and low atmospheric pressure areas and those in normal areas.The authors finally make some suggestions on the supplement and modification of the present standards,which include that ational limits on the concentrations of different gases in the air should be determined according to the altitude and the oxygen concentration must not be lower than 244 g/m3.
出处
《隧道建设》
2010年第6期629-633,共5页
Tunnel Construction
基金
铁道部科技研究开发计划项目(2008G030-D)
中铁隧道集团科技创新计划项目(隧科2008-24)
关键词
关角隧道
高海拔
低气压
空气质量
Guanjiao tunnel
high altitude
low atmospheric pressure
air quality
