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 The enormous increase of traffic and fire catastrophe in tunnels underline the necessity of a comprehensive fire safety design of traffic tunnels.
Amongst a variety of topics, such as accident avoidance, efficient passenger evacuation and smoke spread, structural safety is a major concern. In shallow tunnels or cut-and-cover tunnels, for instance, load-bearing capacity of all structural members must be guaranteed at all times in order to eliminate any hazard to human life and buildings on the surface above the seat of fire.
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