Dynamic Geo-Centrifuge Test on Twin Tunnel
Changwon Kwak1, Dongin Jang2, Innjoon Park3
1Changwon Kwak, Department of Civil & Architectural Engineering Group, KDHEC Bundang-ro, Seongnam-si, Gyeonggi-do, S. Korea.
2Dongin Jang, Ph.D Candidate, Department of Civil Engineering, Hanseo University, Daegok-Ri, Seosan-Si, Choongnam, S. Korea.
3Innjoon Park, Professor, Department of Civil Engineering, Hanseo University, Daegok-Ri, Seosan-Si, Choongnam, S. Korea.
Manuscript received on 25 May 2019 | Revised Manuscript received on 03 June 2019 | Manuscript Published on 22 June 2019 | PP: 372-375 | Volume-8 Issue-3S, February 2019 | Retrieval Number: C10770283S19/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Tunnel is one of the most efficient ways to connect each spot with considerable reduction of the length of road or railway by underground excavation. Therefore, the whole construction cost can be also reduced, however, the seismic safety issues emerges and becomes more important since the hefty earthquakes occurred all over the world, recently. The dynamic behaviour of the underground structures such as tunnel is different to that of superstructures mainly because of the in-situ stress conditions. In this study, dynamic geo-centrifuge test is performed to consider the in-situ stress condition of the surrounding soil against a twin tunnel. Long-term period wave is applied as an input motion and flexible segment is simulated to investigate the effect of acceleration mitigation. As a result, the deviation of peak acceleration increases according to the growth of base acceleration and 17.8 % of acceleration reduction is verified due to the flexible segment.
Keywords: Tunnel, Dynamic Behaviour, Dynamic Geo-Centrifuge Test, Flexible Segment.
Scope of the Article: Geotechnical Engineering