刍议多压力区管网平差中的消防水量参数选择

Discussion on the Selection of Fire Water Quantity Parameters in the Adjustment of Multi Pressure Area Pipeline Network

文章以南京江北新区南钢生活区供水改造工程为例,在说明了本项目中的多压力区管网平差分析与供水分区设计要点的基础上,从需水量计算、分区供水消防用水量的确定这两方面入手,探讨了多压力区管网平差消防用水量的确定。参考现行标准以及最不利工况条件下消防安全的保持要求,确定出本项目的消防用水量设计要求,即无论是对于低区还是高区,均要求依照同时发生火灾2次、一次灭火用水量为25L/s的要求进行对消防用水量的设计。

Taking the water supply renovation project of Nangang living area in Jiangbei new area,Nanjing as an example,this article explains the adjustment analysis of multi pressure area pipeline network and the key points of water supply zoning design in this project.Starting from the calculation of water demand and the determination of fire water consumption for partitioned water supply,the article explores the determination of fire water consumption for multi pressure area pipeline network adjustment.Based on current standards and the requirements for maintaining fire safety under the most unfavorable working conditions,the design requirements for fire water consumption for this project have been determined.That is,whether for low or high areas,the fire water consumption should be designed according to the requirement of 25L/s for two simultaneous fires and one fire extinguishing.