A study of fire smoke spreading and control in emergency rescue stations of extra-long railway tunnels

Xu, Zhisheng; You, Wenjiao; Kong, Jie; Cao, Huan; Zhou, Cai

doi:10.1016/j.jlp.2017.06.014

Cited by 41 publications

(5 citation statements)

References 6 publications

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“…When V = 3 m/s, the total mass flow rate is small, and the average CO concentration is low, indicating that the smoke exhaust effect is quite poor. In summary, the results of this work can be used to guide the management of smoke extraction under the effects of ambient wind and stack effect in both underground and high‐rise building fires …”

Section: Resultsmentioning

confidence: 99%

Effects of fire location on the capacity of smoke exhaust from natural ventilation shafts in urban tunnels

et al. 2018

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Summary Investigation of natural ventilation using shafts in tunnels has been receiving more attentions; however, analyses on how fire position influences the natural ventilation performance have rarely been addressed. This study investigated the influence of different fire positions between two shafts on natural ventilation effectiveness in a tunnel by large eddy simulation. The smoke movement characteristics were studied in detail, with systematically varying the fire position between two shafts and the longitudinal wind speed in the tunnel. The typical smoke characteristic parameters, such as temperature distribution, mass flow rate and CO concentration were emphatically investigated. Some special phenomena, such as plug‐holing and smoke bifurcation, were also discussed.

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Section: Resultsmentioning

confidence: 99%

Effects of fire location on the capacity of smoke exhaust from natural ventilation shafts in urban tunnels

et al. 2018

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“…The results demonstrated that proper coordination of these modes can effectively suppress smoke spread. Xu et al [36] focused on ultra-long railway tunnels with rescue stations and the numerically simulated spread of smoke and scenarios for its control. They found that sufficient longitudinal airflow could limit the thickness of the smoke layer, while reducing air temperature and wind pressure in cross passages, therefore facilitating emergency evacuation.…”

Section: Smoke Control Methods Researchmentioning

confidence: 99%

A Review of the Evolution and Trends in Research on the Emergency Evacuation of Urban Underground Spaces

et al. 2023

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In recent decades, there has been a significant proliferation of literature pertaining to the evacuation of urban underground spaces. However, few studies have focused on scientometric reviews that identify research topics, evolution patterns, and trends in this field. To bridge this gap, the present study adopted a bibliometric approach by searching the literature related to underground space evacuations in the Web of Science (WOS) core database for the period 1992–2022, from which we visualized and analyzed the issuance status of the country, author, and institution, as well as the cooperation status, using Citespace software. The findings of this paper are as follows: First, there has been a consistent upward trend in the quantity of literature within this field over time. Second, Swedish authors and institutions have made important contributions to the advancement of research in this area. Third, the current research topics are concentrated on themes such as modeling and simulation, smoke control methods, integrative research on factors affecting pedestrian evacuation behavior, pedestrian walking speed under smoke-filled conditions, and the influence of wayfinding devices on exit selection/wayfinding. Finally, to advance the safety in underground spaces, future research trends should include improving basic data, refining simulation model parameters, assessing the evacuation capabilities of special populations, examining the impact of risk perception on evacuation behavior, and conducting specific research on the different risks in underground spaces. The findings may contribute to the managerial development of more comprehensive and effective emergency plans for underground spaces, thereby enhancing the survival rates and safety of pedestrians during disasters or other emergencies.

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“…According to Newton's law of cooling (8) Thus, the air temperature in a MRC can be calculated as (9) The natural convective heat transfer coefficient between the air and wall can be calculated as [21] (10)…”

Section: Analytical Modelmentioning

confidence: 99%

“…According to statistics of underground fire and explosion accidents, only a few people among the deaths died directly from the fire and blast wave, and up to 80% of the people indirectly died from carbon monoxide and suffocation [2][3][4][5]. The application of underground emergency refuge system, such as the tunnel rescue station in subway, mine refuge chamber (MRC) and movable shelter in mine, plays an important role in reducing deaths for underground accidents [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of an underground closed chamber with human body heat sources under natural convection

Zhang

Day

Wang

et al. 2018

Applied Thermal Engineering

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A study of fire smoke spreading and control in emergency rescue stations of extra-long railway tunnels

Cited by 41 publications

References 6 publications

Effects of fire location on the capacity of smoke exhaust from natural ventilation shafts in urban tunnels

Effects of fire location on the capacity of smoke exhaust from natural ventilation shafts in urban tunnels

A Review of the Evolution and Trends in Research on the Emergency Evacuation of Urban Underground Spaces

Thermal performance analysis of an underground closed chamber with human body heat sources under natural convection

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