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http://dx.doi.org/10.9711/KTAJ.2014.16.6.561

A Study on ventilation characteristics in bidirectional traffic tunnels - with emphasis on the natural ventilation  

Kim, Hyo-Gyu (JS G&B Inc.)
Hong, Yoo-Jung (R&D Center, JS G&B Inc.)
Yoo, Yong-Ho (Fire Research Center, Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.16, no.6, 2014 , pp. 561-571 More about this Journal
Abstract
The standards of ventilation system for bi-directional tunnel have not been established now. For this reason, with regard to the bi-directional tunnel below 1km, some problems have been appeared in ventilation capacity designing and in determining whether the mechanical ventilation system is needed or not for each case. In this study, we examine the characteristics of natural ventilations, analyze ongoing ventilation design cases for bi-directional tunnels and classify those cases into two groups. This study is carried out about the capability of using natural ventilating system by calculation of reasonable ventilation capacity in bi-directional tunnel and review of relationship between natural wind speed ($Vr^*$) and required speed(Vreq). This paper aims at providing a basis data for bi-directional tunnel ventilation design standards.
Keywords
Bi-directional traffic tunnel; Ventilation design; Natural ventilation rate; Required velocity; Natural velocity;
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  • Reference
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