A Comparative Study Of Fire Safety Provisions Effecting Evacuation Safety In A Metro Tunnel

Andrew Purchase - WSP Sverige AB

Abstract

This paper utilizes Computational Fluid Dynamics (CFD) and evacuation modeling to compare different evacuation configurations in a metro rail tunnel. Different configurations are based on variations in the exit spacing, walkway width and elevation, and the use of longitudinal ventilation for smoke control. The interaction of these evacuation configurations with the tunnel grade and tunnel area are also considered. The different configurations are quantitatively compared on the basis of standard tenability criteria such as visibility, but also using a Fractional Effective Dosage concept regarding asphyxiates.

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