Abstract:

Jet ventilation is one of the major ventilation modes for highway tunnels, while it is a somewhat new ventilation technology for railway tunnels. Since the first successful application of jet ventilation technology in Yaji tunnel (2528m long) on JiaoLiu railway in 1988, jet ventilation technology has been gradually used in railway tunnels and rapid progress has been made. On basis of comparison of the advantages/disadvantages of gallery ventilation and jet ventilation, it is determined that gallery ventilation incorporating jet ventilation technology is adopted for the entrance portion of No. 1 Dayaoshan tunnel. In the paper, detailed ventilation schemes are described and countermeasures to guarantee the ventilation effect are presented.

Key words:  , tunnelventilationjet ventilationgallery ventilation