高海拔隧道施工环境CO浓度控制标准研究

为研究高海拔隧道施工环境CO浓度对人体毒性的影响及CO浓度控制标准,本文基于人体碳氧血红蛋白(COHb)模型对不同海拔高度隧道施工环境CO浓度对人体毒性的影响进行了计算分析。结果表明,相同CO浓度下,仅改变呼吸量不会导致CO对人体毒性影响程度的改变;相反,随着海拔高度的增大,CO对人体毒性的作用显著增强,且CO浓度较低时,随着海拔高度增加人体COHb比值增大越明显,其毒性增长程度也更突出。基于隧道施工人员连续工作8 h体内COHb不高于2.5%为基准,建立了不同海拔高度隧道施工CO浓度控制标准模型。

Research on the Limitation of CO Concentration in High Altitude Tunnels under Construction

In order to study the effects of the CO concentration on human toxicity and its limitation in high altitude tunnels under construction. Human COHb model is employed to study effects of CO concentration on human toxicity in tunnels with various altitudes. The results show that the CO toxicity to human is independent of the respiratory capacity. But the CO toxicity to human is significantly enhanced in high altitude tunnels, and the increasing CO toxicity and the COHb ratio are significantly strengthened in relative low CO concentrations. In view of body COHb less than 2.5% as people working 8 hours in the tunnel, a model of limitation of CO concentration is proposed in the study.