【摘要】 为了研究大埋深电缆隧道二氧化碳气体灭火的可行性与灭火效果，本文以一条220 kV大埋深电缆隧道为研究对象，开展试验研究。试验共设置3组工况、5组火源，对比了不同工况和火源点灭火时间、灭火时二氧化碳和氧气浓度变化、环境温湿度变化、管网系统压力衰减以及管道结冰等。研究表明，二氧化碳气体可以快速扑灭电缆隧道火灾，固定式管网系统尤其适用于大埋深电缆隧道。更多还原

【Abstract】 In order to study the feasibility and effect of carbon dioxide fire extinguishing in large-buried cable tunnel, this paper conducts experimental study on a 220 kV large-buried cable tunnel. Three working conditions and five fire sources were set up in the experiment. The fire extinguishing time at different working conditions and fire source points, the change of carbon dioxide and oxygen concentration during extinguishing, the change of ambient temperature and humidity, the pressure attenuation of pipeline network system, and the freezing of pipelines were compared. Research shows that carbon dioxide gas can quickly extinguish cable tunnel fire, and fixed pipeline network system is especially suitable for large buried cable tunnels.更多还原