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Title |
Fully Coupled Seismic Analysis of Stress-Flow According to Tunnel Drainage Type
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Authors |
최병일(Byoung-Il Choi) ; 하명호(Myung-Ho Ha) ; 이동하(Dong-Ha Lee) ; 노은철(Eun-Cheol Noh) ; 박시현(Si-Hyun Park) |
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DOI |
https://doi.org/10.11112/jksmi.2023.27.4.94 |
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Keywords |
지하수위; 연계해석; 재료 비선형; 내진성능평가; HS Small strain Stiffness 모델 Underground water level; Coupled analysis; Material nonlinearity; Seismic performance evaluation; HS Small strain stiffness model |
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Abstract |
Built in urban ares tunnels is necessary to accurately grasp not only the above-ground environment of the tunnel but also the below-ground environment of the tunnel for design and construct. However, fully coupled analysis of stress and flow is very difficult due to the limited function of the tunnel numerical analysis program and difficulty in using program. This can lead to excessive design that increases the construction cost or occur problems that can lead to accidents during construction. In particular, in the case of an urban tunnel has a low layer soil section above the tunnel and the groundwater level exists in the upper layer of the tunnel. Therefore, a reduction in the groundwater level during underground construction may increase the effective stress of the upper layer and cause the ground to subsidence. So It is necessary to design after accurately evaluating the change in the groundwater level. In this study, the tunnel's behavioral characteristics were analyzed through fully coupled analysis of stress and flow according to the drainage type for an urban underground tunnel.
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