Study on the Optimization of Air Duct Outlet Position of Forced Ventilation in Plateau Spiral Tunnels

Download: PDF (3323KB) HTML (1KB) Export: BibTeX or EndNote (RIS) Supporting Info

Abstract To study the flow field characteristics of the forced ventilation in plateau spiral tunnels and the influ? ence of the layout parameters of air duct outlet position on the tunnel construction ventilation effect, this paper studies the flow field characteristics near the tunnel face based on the Wolonggou No.1 tunnel project, by using the Fluent software and taking into consideration two kinds of longitudinal gradients, three kinds of air duct diameters and seven kinds of air duct outlet distances and other factors. The results show that if the air duct outlet in forced ventilation is too close or too far away from the working face, it is not conducive to the ventilation efficiency, and the optimal air duct outlet positions for Wolonggou No.1 tunnel are obtained regarding different longitudinal gradients and different duct layout diameters, which are applied to the tunnel practice, and the reliability of the results is verified by field tests.

	Service

	Email this article
	Add to my bookshelf
	Add to citation manager
	Email Alert
	RSS
	Articles by authors
	GAO Feng1 TANG Yuchen2 ZHANG Gensi3 LIU Lin3

Keywords： Plateau spiral tunnel Forced ventilation Numerical simulation Air duct outlet position Optimization

Abstract： To study the flow field characteristics of the forced ventilation in plateau spiral tunnels and the influ? ence of the layout parameters of air duct outlet position on the tunnel construction ventilation effect, this paper studies the flow field characteristics near the tunnel face based on the Wolonggou No.1 tunnel project, by using the Fluent software and taking into consideration two kinds of longitudinal gradients, three kinds of air duct diameters and seven kinds of air duct outlet distances and other factors. The results show that if the air duct outlet in forced ventilation is too close or too far away from the working face, it is not conducive to the ventilation efficiency, and the optimal air duct outlet positions for Wolonggou No.1 tunnel are obtained regarding different longitudinal gradients and different duct layout diameters, which are applied to the tunnel practice, and the reliability of the results is verified by field tests.

Keywords： Plateau spiral tunnel, Forced ventilation, Numerical simulation, Air duct outlet position, Optimization

Cite this article:

GAO Feng1 TANG Yuchen2 ZHANG Gensi3 LIU Lin3 .Study on the Optimization of Air Duct Outlet Position of Forced Ventilation in Plateau Spiral Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2021,V58(3): 147-153

URL:

http://www.xdsdjs.com/EN/ 或 http://www.xdsdjs.com/EN/Y2021/V58/I3/147