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http://dx.doi.org/10.12989/gae.2020.21.2.123

Stability evaluation of a double-deck tunnel with diverging section  

La, You-Sung (Department of Civil and Environmental Engineering, Dongguk University)
Kim, Bumjoo (Department of Civil and Environmental Engineering, Dongguk University)
Publication Information
Geomechanics and Engineering / v.21, no.2, 2020 , pp. 123-132 More about this Journal
Abstract
Due to the various restrictions and problems related to the construction of new roads in urban areas, underground road construction has been receiving a great deal of attention in the field of tunnel engineering. In this study, a double-deck road tunnel with a diverging section was analyzed for the evaluation of its stability. Both numerical analysis and scale model tests were performed, the results were used to develop a stability evaluation method for double-deck tunnels with diverging sections constructed in rocks by NATM. From regression analyses conducted on the results of the numerical analysis, an equation and a chart were derived, these tools allow us to obtain the strength/stress ratio (SSR) for double-deck road tunnels with a diverging tunnel in various diverging conditions quickly and accurately. These tools have great potential to help engineers evaluate the stability of double-deck tunnels in the preliminary design stage.
Keywords
double-deck tunnel; diverging condition; strength-stress ratio; stability estimation equation;
Citations & Related Records
Times Cited By KSCI : 12  (Citation Analysis)
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