地铁大断面区间隧道排烟方式分析与探讨

通过对目前地铁大断面区间隧道通常采用的纵向通风的防排烟方式进行分析,针对纵向通风存在的烟气过站、车中火灾时部分乘客在烟雾中疏散等问题,提出利用区间隧道顶部空间,设置排烟风道的半横向通风方式,并针对半横向通风方式存在的问题进行分析和提出相应解决方案,所得结论可为地铁工程中大断面区间隧道的防排烟设计提供参考。

Research on Smoke Exhaust Mode of Metro Tunnel with Large Cross-section

The thesis analyzes the smoke exhaust mode in the form of longitudinal ventilation,which is frequently used in metro tunnels with large cross-sections.Then,focusing on those problems in longitudinal ventilation mode,such as smoke passing through the station and passengers escaping in the smoke when the train catches fire,the thesis puts forward a semi-transverse ventilation mode in which the smoke exhaust ducts should be installed at the top of the metro tunnel.Further,the thesis makes detailed research on the problems existed in this semi-transverse ventilation mode and provides the methods of how to solve them.The conclusion may serve as valuable reference for smoke exhaust system design of metro tunnel with large cross-section.