胶州湾海底隧道防排烟设计探讨

Discussion on Jiaozhou bay submarine tunnel smoke control design

分析海底隧道火灾烟气的特点及危害。结合青岛胶州湾海底隧道情况,运用FDS模拟分析海底隧道半横向通风在各种情况下的排烟效果,通过改变排烟口数量、排烟量以及隧道内纵向风速等参数研究烟气运动规律。结果表明,排烟量相同时,开启的排烟口越少,越有利于控制烟气向两端蔓延;存在纵向风时,火源上游排烟口越少,烟气抑制效果越好,烟气运动速率随纵向风速的增大而减小。

The characteristics and harms of submarine tunnel fire smoke were analyzed.Combining the situation of Qingdao Jiaozhou bay submarine tunnel,FDS was used to simulate the smoke control effect of submarine tunnel semi-transverse ventilation in different situations.The smoke movement laws was studied by changing parameters such as exhaust port number,the amount of smoke exhausted,and the vertical wind speed in tunnel.Results showed that when the amount of smoke exhausted is the same,the less the exhaust port opened,the easier the smoke spreads;when there is vertical wind,the less the exhaust port upstream of the fire source opens,the better the smoke is controlled,and the smoke movement speed decreases as the vertical wind speed increases.