为设计出更加安全可靠、经济合理的轨道交通工程，介绍南京—马鞍山城际铁路（简称宁马线）消火栓系统设计中的一些关键技术及其相对于常规传统设计的优点。首先，在对规范解读及工程经验分析的基础上，首次提出“轨道交通工程中，为了保证消防安全，消防泵房保护距离尽量控制在2 000 m以内”的原则。为了将此理念落实到具体设计中，在本工程中提出一种新的消防供水方案，即“消防供水多方案组合模式”，具体内容为： 1）优先选用一站带左右各半个相邻区间的方案； 2）当区间长度小于2 000 m时，也可以采用一站带一相邻区间方案； 3）当区间长度大于4 000 m时，在一站带左右各半个相邻区间方案的基础上，在区间风井处设置独立的消防泵房，以保证所有消防泵房的保护距离控制在2 000 m以内； 4）将各消防泵房的供水单元完全独立。其次，在车站给水水压制式方面，提出2种单路水源高架站的消防供水方案及其适用范围，即： 1）室外低压、室内临时高压系统，适用范围为 “高架站布置在市政道路一侧，并且车站离市区较近、消防基础设施条件较好，能保证足量消防车及时赶到火灾现场”或“条件特别困难的既有高架车站改造”； 2）室内外共用临时高压消防系统，适用范围为 “高架站布置在市政道路中央”或“车站离市区较远、消防基础设施条件比较不利，不能保证足量消防车及时赶到火灾现场”。最后，在消防设施布置方面，提出“高架车站室外消防水池、扑救类室外消火栓”的布置原则，其中最重要的2条为： 1）室外低压、室内临时高压系统中，当高架站超出消防水池150 m保护半径时，应增设相应的消防水池取水井； 2）车站扑救面上布置室外消火栓时，应优先布置在每个高架站出入口附近。

 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 2 000 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 2 000 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 4 000 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 2 000 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.