基于现行规范的地铁应急照明设计探讨

针对应急照明现行规范在地铁上的设计差异及争议,通过对集中电源、区间疏散照明的配电方案进行对比分析;对电压偏差、应急照明照度的取值、公共区备用照明、区间方向标志灯、吊装标志灯等设置等进行分析探讨,提出目前应急照明设计的一些具体方案及做法。对于集中电源的配电,建议根据消防负荷分布选择在车站两端设置消防小动力箱或疏散照明双切箱;消防应急灯具端子处电压偏差可按额定电压的20%核算;区间疏散照明建议选用10 W灯具,按10 m间距布置;公共区备用照明和吊装标志灯的设置,建议根据当地消防和运营要求决定;各场所的疏散照度值建议按较大值执行。

Design of Emergency Lighting for Metro Based on Current Code

With the design difference of new code for emergency lighting on a metro vehicle, via comparison and analysis of the distribution scheme of a centralized power supply and tunnel evacuation lighting, voltage deviation, emergency lighting illumination value, public area standby lighting, tunnel direction marker lamp, and hoisting marker lamp setting are analyzed and discussed. Some concrete schemes and practices of a current emergency lighting design are put forward. For the distribution of centralized power supply, it is suggested that, according to the distribution of fire load, a small fire power box or a power switch box for evacuation lighting should be set up at both ends of the station. The voltage deviation at the terminal of the fire emergency lamp can be calculated at 20% of the rated voltage. Tunnel evacuation lighting suggests the usage of 10-W lamps, in accordance with 10-m spacing. The setting of the public area standby lighting and hoisting of marker lights should be determined according to the local fire department and operational requirements. The evacuation illumination of each site is designed according to the larger value.