城市交通联系隧道组合排烟模式烟气控制研究

Study on smoke control in combined smoke exhaust mode for urban traffic link tunnel

通过对各城市公路隧道进行调研并根据规范要求,选定城市交通联系隧道尺寸,并以此为原型建立1∶3的缩尺试验台,通过对烟气温度变化及烟气蔓延状况进行分析,研究城市交通联系隧道发生火灾时采用组合排烟模式的烟气控制效果。结果表明:城市交通联系隧道岔路口上游发生火灾时,采用纵向排烟和单点排烟协同作用的控制模式下,能够把烟气有效控制在主隧道上,保证其余支路不受影响。

Through the investigation of the highway tunnel in each city and according to the requirements of the standard,the size of the urban traffic link tunnel was selected,and the scale test rig of 1∶3 was established based on the prototype.In the study of urban traffic link tunnel fire,through the analysis of the change of flue gas temperature and the spread of flue gas,the effect of flue gas control by combined exhaust smoke mode was explored.The re.sults showed that the flue gas can be effectively controlled in the main tunnel under the control mode of the synergistic effect by lon.gitudinal smoke exhaust and single point smoke exhaust in the up.per reaches of the tunnel intersection,which ensures that the re.maining branches are not affected.