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http://dx.doi.org/10.9711/KTAJ.2018.20.1.145

A study on the development and performance evaluation of duct coupling for the minimized leakage of temporary ventilation duct  

Jo, Hyeong-Je (Bumchang Co., ltd.)
Jun, Kyu-Myung (Bumchang Co., ltd.)
Min, Dea-Kee (Bumchang Co., ltd.)
Kim, Jong-Won (Bumchang Co., ltd.)
Beak, Jong-Hoon (Bumchang Co., ltd.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.20, no.1, 2018 , pp. 145-160 More about this Journal
Abstract
Long subsea tunnel is subject to many restrictions in terms of spatial limitation when vertical or inclined shafts are built for tunnel ventilation. So, the construction of some artificial island is required to provide ventilation. But, because of construction difficulty and cost increase, it is necessary to minimize the artificial island construction. As a result, ventilation distance become longer and supply airflow becomes excessive due to air leakage, So, duct mounting for temporary ventilation is impossible or fan pressure and power increase exponentially. Therefore, in order to build a long subsea tunnel, it is necessary to overcome these practical problems and to develop technical solution that can keep the comfortable condition of tunnel environment during construction. In previous study, we have found that air leakage is the key factor in solving these problems and experimental results show that the new connection method has a leakage rate of about $1.46mm^2/m^2$ (Jo et al., 2017). In this study, we present the experimental results of the measurement of the leakage rate of the prototype with the new connection method, and analyze experimentally the improvement of the leakage rate when applying the flexible cover inside the duct to improve the leakage performance of the existing connection method.
Keywords
Subsea tunnel; Temporary ventilation; Air leakage ratio; Prototype; Leakage performance;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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