Full-scale experimental study on the burning and spreading characteristics of baggage fire in high-speed railway waiting hall
In order to provide a reference for the fire safety design of the waiting hall of high-speed railway,a full-scale burning test for baggage fire was carried out in the partial area of a waiting hall with 5 MW calorimeter.Typical baggage combustible materials such as 50 cm×30 cm×20 cm hand luggage,woven bags and backpack(books,notebooks,pen cases,pens and power banks)were used to form baggage stacks.The variation trend of charac-teristic parameters such as heat release rate,temperature and radi-ant heat flow were monitored and recorded.Results show that the burning of the full-scale baggage fire presents obvious stage char-acteristics.The temperature rise and heat release rate increase the fastest in the development stage,and the variation trend of heat release rate in the growth stage of baggage fire is in good agree-ment with the t2 fast fire.The maximum heat release rate of bag-gage fire reaches 1 004 kW and the maximum temperature is close to 640 ℃.In current full-scale baggage stack fire,the combus-tibles 1 m away from the burning baggage stack were not ignited,but softened and melted.To some extent,an interval distance of 1 m can effectively avoid the continuous spread of open flames in luggage stacks.The 9 m isolation belt can effectively play the role of fire and heat insulation,and the temperature rise and radiant heat flow at the location 9 m away from burning luggage stack are not obvious.
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