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Shanghai, Guangzhou, Shenzhen and other places, considering that passengers take the subway to airports, railway stations, transfer stations and other places, they carry more luggage, which may include combustible fiber fabrics, paper, food, etc. at the same time, considering man-made arson and other explosives, the author suggests to select 5MW as the moving load, The heat release rate curve is shown in Figure 2. 3.2 determination of the location of subway fire point the actual fire source may be located in different locations in the subway. In subway fire research or fire protection design, it is necessary to consider some scenes that have an important impact on smoke flow and personal safety. It should be emphasized that the selection of some scenes that have an important impact on smoke flow and personal safety is not based on personal subjective judgment or experience, but screening them under the condition of comprehensive consideration of various possible fire scenes, and eliminate the randomness and possible error analysis caused by different personal subjective judgment or experience as far as possible [13]. The location of subway fire point is considered from the following two aspects: (1) when a fire occurs in the train carriage, the train is parked at the subway platform; (2) Moving combustibles on subway platforms ignited. Through the subway investigation in many cities in China, it is found that the subway platform is mainly divided into island type, side type and mixed type. This paper will take the side platform as an example. The fire in the train compartment can be divided into two situations according to different positions: (1) a fire occurs in the middle of the train compartment, and
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