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为研究公路隧道压入式施工爆破后有毒有害气体扩散规律,以CO、H2S、CH4为研究对象,建立施工通风一维数学模型,采用人工检测与自动化监控方法,以实际工程为依托对某隧道进行了现场测试。研究结果表明:CO和H2S作为放炮作业的主要产物,能够作为判断隧道内污染物状况、研究有毒有害气体扩散规律的控制指标;污染物扩散的快慢主要由洞内风速决定,针对有毒有害气体的公路隧道,应加强通风适当增加洞内通风量或者风速。该研究对公路隧道有毒有害气体扩散模型和通风系统参数的设计提供了有效参考。
In order to study the law of diffusion of poisonous and harmful gases after the blasting of highway tunnels, CO, H2S and CH4 are taken as the research objects, a one-dimensional mathematical model of construction ventilation is set up. By artificial detection and automatic monitoring methods, Conducted a field test. The results show that CO and H2S are the main products of blasting operation, which can be used as a control index to judge the pollutants in the tunnel. The diffusion speed of pollutants is mainly determined by the wind speed inside the tunnel. For the toxic and harmful gases Road tunnel, ventilation should be strengthened appropriately increase the amount of ventilation or wind speed inside. The research provides an effective reference to the design of the toxic and harmful gas diffusion model and ventilation system parameters of highway tunnels.