地铁隧道环网消火栓供水系统多工况模拟

地铁隧道消火栓系统的环网布置,将所有车站及区间内的消防供水设施构成相互贯通的整体,以使各车站消防水源互为备用。为增加消防可靠性,每一地铁厅站均配有消防泵,为分析地铁隧道消火栓系统环网中消防泵的启动情况,首先构建了地铁隧道内消火栓系统的水力计算模型;然后对系统运行进行多工况计算,模拟不同火灾点、不同地形高差、不同稳压泵稳压值以及事故工况时,模拟了消防管网中消防主泵的启动情况。根据模拟结果,证明环网布置方式可以根据管网压力自动启动消防主泵,能够起到改善供水可靠性的目的。同时结合环网布置的特点,对环网消火栓系统布置方式提出了设计运行建议。

Multi-condition Simulation of Subway Fire Water Supply System with Looped Layout

In the loop network layout of the subway fire hydrant system, the fire water supply facilities in all stations and sections shall be integrated with each other so that the fire water sources at each station are used as backup to improve the reliability of the fire hydrant system. In order to analyze the fire protection policy of the loop network layout, the hydraulic calculation model is first used to simulate the automatic start of pressure in the fire hydrant system in the subway. Multiple conditions are calculated for the system operation process to simulate the starting conditions of the fire pump in the fire pipe network under different fire points, different elevation, different pressure stabilizing values of the pressure-stabilizing pump and accident conditions. According to the simulation results, it is proved that the loop network layout method can start the main fire pump automatically according to the pressure change of the pipe network. Combined with the characteristics of the loop network layout, the design and operational recommendations of the loop network fire hydrant system layout are proposed.