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http://dx.doi.org/10.9711/KTAJ.2018.20.2.393

A study on the stability analysis for double deck tunnel branch geometry  

Park, Woo-Jeong (Geotechnical Department, Sambo Engineering Co., Ltd.)
Jang, Namju (Geotechnical Department, Sambo Engineering Co., Ltd.)
Kim, Kihwan (Geotechnical Department, Sambo Engineering Co., Ltd.)
Choi, Chang-rim (Geotechnical Department, Sambo Engineering Co., Ltd.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.20, no.2, 2018 , pp. 393-404 More about this Journal
Abstract
The tunnel can be planned to connect to underground roadway and surface road. The large tunnel and branch section are made when the ramp tunnel access to the main tunnel. In the branch section, stress concentration can be assigned and it can be very important for the stability of the tunnel. This study assessed the behavior of rock pillar in double deck tunnel diverging area by using a two dimensional numerical analysis. This study evaluated different safety factors according to pillar width and the ramp tunnel position in branch. By the assessment of the strength-stress ratio, tunnel pillar width is suggested in order to secure the safety factor 1.5.
Keywords
Double deck tunnel; Rock pillar; Strength-stress ratio; Diverging area; Stability;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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