武汉轨道交通 8 号线 越江区间通风系统研究

介绍了武汉轨道交通8号线大直径盾构越江区间隧道的通风设计方案，特别对火灾工况，从排烟模式、风道漏风、风机配置等方面，比较了分段纵向通风和半横向通风两种方式的优缺点，最终选定了分段纵向排烟方案。在火灾规模取值10.5MW条件下，利用SES软件对区间内典型火灾工况进行了模拟计算分析，结果表明通过区间两端风机联合动作，采用集中设置排烟口的分段纵向排烟方案，可满足越江区间内火灾排烟临界风速及人员疏散要求。

Research on Ventilation of the Crossing-river Section of Wuhan Rail Transit Line 8

The ventilation design scheme of the large diameter shield tunnel in Wuhan Rail Transit Line 8 is introduced. In particular, the advantages and disadvantages of two modes of sectional longitudinal ventilation and semi horizontal ventilation are compared from the smoke exhaust mode, air duct leakage and fan configuration. Finally, the subsection longitudinal smoke exhaust scheme is selected. Under the condition of the fire scale 10.5MW, the typical fire conditions in the interval are simulated and analyzed by SES software. The results show that through the joint action of the fan at the two ends of the interval, a sectional longitudinal smoke exhaust scheme which concentrates the exhaust port can be used to meet the critical wind speed and the evacuation requirements of the fire disaster in the cross-river section.