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| Discussion on disaster prevention ventilation design for a curved road tunnel |
| DAI Kailai1,2,3, WANG Feng2,3
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1. China Merchants Chongqing Communications Research &
Design Institute Co., Ltd., Chongqing 400067, China;
2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China;
3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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Abstract In order to figure out the most-dangerous fire location and the disaster prevention design for curved tunnels, the typical fire scenarios, the factors affected critical velocity, as well as the disaster-prevention jet fan configuration of curved tunnels was discussed in this paper. The results showed that: The disaster prevention ventilation design for curved tunnelsshould be considered in case of the fire accident occurred at the convex wall in the steady stage of curve. The maximum critical velocity of curved tunnels was higher than that of the straight tunnel. Therefore, the correction coefficients on fire location, curve radius and tunnel slope for critical velocity of curved tunnelswere proposed respectively. Moreover, the number of operating jet fans for disaster preventionof curved tunnels was higher than that of the straight tunnel andthe calculation method for the number of operating jet fans for disaster prevention in curved tunnels was proposed.
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Published: 28 June 2024
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