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A platform for research: civil engineering, architecture and urbanism
Small‐scale fire tests in the underwater tunnel section model with new sidewall smoke extraction
The Shenzhen–Zhongshan Bridge is a 24‐km‐long bridge and tunnel system, including a 6.8‐km‐long super cross section subsea tunnel. To solve the smoke exhaust problem of a super large cross‐section subsea tunnel, the tunnel has a new smoke exhaust system that combines a horizontal smoke exhaust cross section at the top and sidewall smoke exhaust holes. In order to evaluate the potential fire hazards of this type of tunnel, a 1:30 tunnel model was established and 140 small‐scale experiments on underwater tunnel fires were conducted. By changing the fire power, fire location, and fan operation mode, different scenarios of submarine immersed tunnel fire were simulated and the related key parameters such as fire smoke diffusion behavior and smoke temperature distribution were studied. On this basis, the optimal smoke control strategy was proposed for different fire scenarios. The research results indicate that the new smoke exhaust system can fully utilize the smoke flow characteristics, significantly improve smoke exhaust efficiency, and increase available evacuation time, thus further enhancing the fire safety of super large cross‐section subsea tunnels.
A 30:1 underwater immersed tunnel model was built and 140 sets of fire model experiments were conducted to reproduce various scenarios of tunnel fires.
The diffusion law of smoke was studied. Without ventilation, smoke is effectively blocked by the smoke exhaust cross section and controlled within 2–3 smoke prevention intervals.
The aims of this work are to study the smoke exhaust effect, compare the smoke exhaust effects of different ventilation air volumes and fan operation modes, and summarize the best smoke exhaust plan.
Small‐scale fire tests in the underwater tunnel section model with new sidewall smoke extraction
The Shenzhen–Zhongshan Bridge is a 24‐km‐long bridge and tunnel system, including a 6.8‐km‐long super cross section subsea tunnel. To solve the smoke exhaust problem of a super large cross‐section subsea tunnel, the tunnel has a new smoke exhaust system that combines a horizontal smoke exhaust cross section at the top and sidewall smoke exhaust holes. In order to evaluate the potential fire hazards of this type of tunnel, a 1:30 tunnel model was established and 140 small‐scale experiments on underwater tunnel fires were conducted. By changing the fire power, fire location, and fan operation mode, different scenarios of submarine immersed tunnel fire were simulated and the related key parameters such as fire smoke diffusion behavior and smoke temperature distribution were studied. On this basis, the optimal smoke control strategy was proposed for different fire scenarios. The research results indicate that the new smoke exhaust system can fully utilize the smoke flow characteristics, significantly improve smoke exhaust efficiency, and increase available evacuation time, thus further enhancing the fire safety of super large cross‐section subsea tunnels.
A 30:1 underwater immersed tunnel model was built and 140 sets of fire model experiments were conducted to reproduce various scenarios of tunnel fires.
The diffusion law of smoke was studied. Without ventilation, smoke is effectively blocked by the smoke exhaust cross section and controlled within 2–3 smoke prevention intervals.
The aims of this work are to study the smoke exhaust effect, compare the smoke exhaust effects of different ventilation air volumes and fan operation modes, and summarize the best smoke exhaust plan.
Small‐scale fire tests in the underwater tunnel section model with new sidewall smoke extraction
Yue, Shunyu (author) / Miao, Ruifeng (author) / Cheng, Huihang (author) / Zhong, Maohua (author) / Yang, Xiujun (author)
Deep Underground Science and Engineering ; 3 ; 247-254
2024-06-01
8 pages
Article (Journal)
Electronic Resource
English
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