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Effects of evacuation delay time and fire growth curve on quantitative risk for railway tunnel fire

철도터널 화재 시 피난개시시간지연 및 화재성장곡선이 정량적 위험도에 미치는 영향

  • Received : 2018.06.26
  • Accepted : 2018.07.24
  • Published : 2018.09.30

Abstract

A quantitative risk assessment has been introduced to quantitatively evaluate fire risk as a means of performance based fire protection design in the design of railway tunnel disaster prevention facilities. However, there are insufficient studies to examine the effect of various risk factors on the risk. Therefore, in this study, the risk assessment was conducted on the model tunnel in order to examine the effects of the evacuation start time delay and the fire growth curve on the quantitative risk assessment. As a result of the analysis of the scenario, the fatalities occurred mainly when escapes in the same direction as the direction of the fire smoke movement. In addition, after the FED exceeded 0.3, the maximum fatalities occurred within 10 minutes. In the range of relatively low risk, distance between cross passages, evacuation delay time and fire growth curve were found to affect the risk, but they were found to have little effect on the condition that the risk reached the limit. Especially, in this study, it was evaluated that the evacuation delay time reduction, fire intensity and duration reduction effect were not observed when the distance between cross passages was more than 1500 m.

Acknowledgement

Grant : 고수압 초장대 해저터널 기술 자립을 위한 핵심요소 기술개발

Supported by : 국토교통과학기술진흥원

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