Rail transport engineering that is safe,reliable,and cost-effective is a developing trend in the rail transit system.In this study,key technologies in designing the fire hydrant system of the Nanjing-Ma'anshan intercity railway and its advantages over conventional designs are introduced.Initially,through interpreting relevant codes and analyzing engineering experience,a principle of"pump room protection distance for fire hydrants within 2000 m"and a fire water supply scheme termed"multi-scheme water supply combination mode in case of fire"are proposed.The specific contents include the following:(1)Scheme I,where two adjacent stations are responsible for the half sections ahead of and behind the stations,is prioritized.(2)For section lengths less than 2000 m,Scheme Ⅱ can be adopted,wherein one station is responsible for the entire single-line section between two stations.(3)For sections more than 4000 m,an independent fire pump room should be established at the ventilation shaft based on Scheme Ⅰ to ensure that the protection distance of all fire pump rooms is within 2000 m.(4)Each fire pump room's water supply units should be fully segregated.Subsequently,two innovative fire-fighting water supply schemes for single-water source viaduct stations are proposed:the outdoor low-voltage and indoor temporary high-voltage system for viaduct stations adjacent to municipal roads and near cities with robust fire-fighting infrastructure;and the indoor and outdoor temporary high-voltage system for those in the middle of municipal roads and distant from cities with inadequate fire-fighting infrastructure.Lastly,a layout principle for fire infrastructures,such as outdoor fire water tanks and hydrants for viaduct stations,is proposed.It is recommended that for the outdoor low-voltage and indoor temporary high-voltage system,water tanks should be positioned if the distance between the viaduct station and the tank exceeds 150 m;fire hydrants should be strategically placed at the entrances and exits of viaduct stations.
rail transit engineering/fire hydrant system/pump room protection distance for fire hydrant/multi-scheme water supply combination mode in case of fire/station water supply pressure system/outdoor fire water tank
维普
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