Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Building Environment and Energy Engineering | en_US |
| dc.contributor.advisor | Huang, Xinyan (BEEE) | en_US |
| dc.creator | Li, Haiping | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/14117 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Study on evacuation strategy of subway station under fire | en_US |
| dcterms.abstract | With the development of modern cities, subway routes have increased and subway is becoming the main means of transportation for people. Because of its high fire danger and evacuation difficulties, the safety of subway stations has attracted great attention from the public. Subway stations have many unfavorable characteristics such as rapid deterioration of fire level, large amount of smoke, high toxicity, susceptibility to booming combustion phenomenon and difficulty in extinguishing. It is very difficult to evacuate in a limited time. Therefore, the study of fire evacuation in subway stations is crucial. | en_US |
| dcterms.abstract | This paper introduces the software and theories involved in subway station fires and evacuation, analyzes the impact of subway fires on evacuation, and identifies three important factors affecting evacuation and their thresholds. At the same time, the basic principles of safety evacuation are determined, and the requirements of safety evacuation for Available Safety Egress Time (ASET) and Required Safety Egress Time (RSET) are clarified. In this paper, on the basis of the above theory, Pyrosim is used to construct a subway station model to study the fire on the platform level and the fire on the station hall level. The fire simulation mainly analyzed the smoke spread, temperature, visibility and CO concentration at the key locations of each condition. It finds that the CO concentration has little effect, so the ASET is determined mainly by the temperature and visibility. The ASET is only 120s. Moreover, the escalator near the fire source is prohibited to be used after 20s in case of fire, which greatly affects the people evacuation. Based on the results of the fire simulation, evacuation is simulated using Pathfinder. After analyzing the change in the number of people to be evacuated, the change in the density of people, and the utilization rate of the exits at the key evacuation locations of the basic conditions, the conclusion is that it is difficult to meet the requirements for safe evacuation under the current design. | en_US |
| dcterms.abstract | The evacuation optimization schemes are proposed. The optimization results show that in emergency situations, the use of escalators in different directions, larger gate widths, and the addition of emergency evacuation staircases can increase the evacuation efficiency by 11.8% , 5.6%, and 7.9% , respectively. This paper is expected to provide some design references and theoretical support for subway safety design/performance-based design. | en_US |
| dcterms.extent | viii, 63 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2025 | en_US |
| dcterms.educationalLevel | M.Eng. | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 8572.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.28 MB | Adobe PDF | View/Open |
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