基于劳动强度的高海拔隧道施工供氧标准研究

High-altitude tunnel construction oxygen supply standards based on labor intensity study

目前,我国的高海拔隧道建设数量正在逐渐增多,针对高海拔隧道施工中的低氧环境问题,首先通过理论分析对高海拔隧道施工环境进行了系统分析,在此基础上采用现场实测的方法,对不同海拔隧道施工过程中关键工序的劳动强度进行了分级,并确定了适用于高海拔隧道施工的供氧高度和供氧浓度标准。研究结果表明:当海拔超过4000 m时,高海拔隧道施工中的关键工序劳动强度相较于平原地区提升了一个等级;基于劳动强度的分析结果,研究确定了适用于高海拔隧道施工的供氧高度为4000 m,并提出了不同工序的安全性与舒适性供氧浓度标准。

Currently,the number of high-altitude tunnel construction projects in China is gradually increasing.To address the low-oxygen environment challenges in high-altitude tunnel construction,this study first conducted a systematic theoretical analysis of the high-altitude tunnel construction environment.Based on this analysis,field measurements were then employed to classify the labor intensity of key construction processes at different altitudes.The study also established appropriate oxygen supply altitudes and concentration standards for high-altitude tunnel construction.The results indicate that when the altitude exceeds 4000 meters,the labor intensity of key construction processes in high-altitude tunnels is one level higher compared to plain areas.Based on the analysis of labor intensity,the study determined that the suitable oxygen supply altitude for high-altitude tunnel construction is 4000 meters and proposed safety and comfort-oriented oxygen concentration standards for different construction processes.