摘要
综合管廊是城市生命线工程,对城市运维具有重要作用。根据现有规范要求,需要在含电缆的舱室内布置灭火系统。通过设计不同火源和实验工况,从性能、失能和安全性角度评价综合管廊常用的自动灭火系统(干粉灭火系统和高压细水雾灭火系统)。结果发现,两类灭火系统均能快速灭火,而高压细水雾灭火系统具有降温效果好、现场不留痕迹、全生命周期内成本低等优势,更适用于综合管廊。此外,由于电缆短路火灾时温度较低,为了提高火灾识别的敏感度,可以采用在管廊内设置感烟探测器、在电力电缆上敷设差定温线形感温电缆,以及降低干粉灭火装置动作温度等措施。
The utility tunnel serves as a crucial urban infrastructure project,playing a pivotal role in the operation and maintenance of the city.In accordance with the current regulations,it is imperative to install a fire extinguishing system in the cable-containing cabin.The performance,failure capacity and safety of the commonly employed automatic fire extinguishing systems(dry powder fire extinguishing system and high-pressure water mist fire extinguishing system)in utility tunnels were assessed under various experimental conditions involving different fire sources and operational scenarios.Both fire extinguishing systems were capable of rapidly extinguishing fires,but the high-pressure water mist fire extinguishing system offered the advantages of superior cooling effect,leaving no residue at the site,and lower overall life cycle costs,making it more suitable for utility tunnel.In addition,to enhance fire detection sensitivity in the event of a cable short-circuit fire at low temperatures,smoke detectors could be installed in the utility tunnel,and linear temperature sensing cables could be laid on the power cable.Additionally,measures such as reducing the operating temperature of the dry powder fire extinguishing device should be implemented.
作者
许云骅
邹丽
丛北华
徐率先
张杨
王家华
朱浩川
XU Yun-hua;ZOU Li;CONG Bei-hua;XU Shuai-xian;ZHANG Yang;WANG Jia-hua;ZHU Hao-chuan(Shanghai Urban Construction Design&Research Institute<Group>Co.Ltd.,Shanghai 200125,China;Shanghai Tongtai Fire&Security Technology Co.Ltd.,Shanghai 201703,China;Shanghai Institute of Disaster Prevention and Relief,Tongji University,Shanghai 200092,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2024年第15期115-122,共8页
China Water & Wastewater
关键词
综合管廊
干粉灭火系统
高压细水雾灭火系统
内部过载火源
外部燃气火源
utility tunnel
dry powder fire extinguishing system
high-pressure water mist fire extinguishing system
internal overload fire source
external gas fire source
