综合管廊电力舱自动灭火措施探讨

Discussion on fire protection of electric cabin in urban utility tunnel

目前电力舱设计尚大多依据电力隧道,但综合管廊电力舱具有不同于电力隧道的特点。通过对综合管廊内的消防自动灭火系统的实地调研,结合现行规范分析,提出适用于综合管廊电力舱的自动灭火措施,推荐优先选用全线或重点部位设置悬挂式超细干粉灭火装置,有条件地区可选用全线高压细水雾灭火系统。由于高压细水雾灭火系统应用于隧道的实际工程案例较少,问题较多,特结合实际工程经验,重点研究和分析了高压细水雾系统选用的设计要点。

At present the design of the electric cabin is cased on the cable tunnel,while the electric cabin has diffent characteristics.The author conducted field investigation on the automatic fire extinguishing system in the electric cabin inside the utility tunnel,combined with the analysis of current specifications,put forward automatic fire extinguishing measures applicable to the the electric cabin inside the utility tunnel.It is recommended that suspended ultra-fine dry powder fire extinguishing devices be set in the whole line or key parts,while the high pressure water mist fire extinguishing system of the whole line can be selected in conditional areas.There are few practical engineering cases and many problems of high-pressure water mist fire extinguishing system applied to tunnel,combined with practical engineering experience,this paper focuses on the design points of high-pressure water mist system for future engineering reference.