武汉东湖通道工程水下隧道消防设计

针对武汉东湖隧道工程特点,采用多种消防系统共同承担东湖隧道消防体系,其中隧道车行道的暗埋段和半敞口段采用消火栓系统及泡沫-水喷雾系统,主线隧道及匝道的敞开段采用消火栓系统,隧道设备间采用无管网超细干粉灭火,同时在隧道内配设灭火器。重点阐述消火栓系统及泡沫-水喷雾系统的组成及布置、设计参数选取、设备选型。为达到喷头均匀布水的要求,根据隧道车行道宽度不同,选择不同喷头按不同间距采用双侧或单侧布置,灭火时启动1台或2台消防泵。另外对隧道火灾报警系统的组成、火灾报警设施类型、系统功能等进行简要说明。

The Design of Wuhan East Lake Tunnel Fire Protection System

According to the engineering characteristics of Wuhan East Lake tunnel,a multi-fire protection system is employed. Fire hydrant system and foam-water spray system are used in the buried and semiopen sections of the tunnel roadway while only fire hydrant system is designed in the opening section of the main tunnel and ramp. Pipeless ultra-fine powder fire extinguishers are equipped in the tunnel equipment room and fire extinguishers are in place along the whole tunnel. This paper focuses on the composition,arrangement,design parameters and selection of the foam-water spray system. To achieve a uniform distribution of water sprinklers,different nozzles are selected and installed in different intervals on either two sides or one side according to the width of the tunnel roadway. One or two pumps are activated accordingly during fire fighting. In additional,the composition of fire alarming system,the types of alarming facilities and the system functions are concisely explained.