碩士 / 國立高雄第一科技大學 / 環境與安全衛生工程所 / 96 / As fire accident occurred in tunnel, it could result in the serious property and life damage. In order to investigate the cause and ignition location of fire accident in tunnel, 188 fire accidents occurred in tunnel were reviewed in this study, firstly. The statistical analysis indicated that the major cause of road tunnel fire is mechanical failure of vehicle (42%), and the major cause of railway tunnel fire is electric device failure. On the other hand, the fishbone diagrams were developed to illustrate the causes and effects of fire accidents in road and railway tunnel, respectively. Then the fire risk assessment method – Event Tree Analysis was further conducted in this study in order to provide the prevention strategy for reducing fire risk in tunnel fire. The fire risk analysis showed that the well-controlled smoke exhaust system has a significant effect on the reduction of life loss and injury.
According to the fire accidents investigation, the author also observed that the neighbor cars of fire source were often ignited resulting the real heat release rate of fire accident was larger than the designed fire size. Thus, the designed critical velocity could not prevent the smoke from back-layering in real situation. Therefore, the second purpose of this thesis is to study the relationship between the critical velocity and multiple fire sources .The FDS simulation and small scaled experimental results showed that the required critical velocity for multiple fire sources was smaller than that for single fire source with the same heat release rate. As the distance between two heat sources is larger than 60cm, the dominant influence in the critical velocity is the HRR of upstream heat source.
| Identifer | oai:union.ndltd.org:TW/096NKIT5519041 |
| Date | January 2008 |
| Creators | Tsun-Tse Huang, 黃尊澤 |
| Contributors | Kuang-Chung Tsai, 蔡匡忠 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 112 |
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