Study on Refugee Density in case of Escape in a Building

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  • 中間避難階に要求される避難者密度の研究
  • チュウカン ヒナン カイ ニ ヨウキュウサレル ヒナンシャ ミツド ノ ケンキ

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Abstract

It's difficult to escape from the top floor to the ground floor in a high-rise building, so having an escape floor standing in a siege midfloor will become an important method of escaping in case of a fire. Therefore to investigate the suitable population density to design the escape floor standing in a siege midfloor, we used the following method: (1) Assuming the comfortable escape area, from the experiment that the subject stands in the center of the circle and the object approaches to the subject, we measured "unbearable" distance and "began to feel the presence". (2) For investigating the interval length in the short period of time, we measured the interval length by people waiting for the train in one line during rush hour. (3) For investigating the actual crowd density, we measured the crowd waiting for a change of the signal at a crossing. We investigated the effect of the season by comparing with the summer and winter data. As a result, we found the crowd density stayed without the feeling of oppression in 0.3∼0.4 [p/m2], stayed in a short period of time in 1.5[p/m2], and the most crowd density in 2.5∼2.8 [p/m2], to design escape floor standing in a siege midfloor.

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