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Structural Engineering and Mechanics Volume 73, Number 4, February25 2020 , pages 367-379 DOI: https://doi.org/10.12989/sem.2020.73.4.367 |
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Ground-born vibration at multileveled train tunnel crossing |
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Hoon-Ki Moon, Kang-Hyun Kim, Ho-Jong Kim and Jong-Ho Shin
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| Abstract | ||
| In recent railway projects where the railway connects between cities, newly planned tunnels are often located close to, or beneath an existing tunnel. Many claims and petitions have voiced public concern about the vibration and noise resulting from the situation. Vibrations and noises are engineering issues as well as environmental problems, and have become more important as people have become more concerned with their the quality of life. However, it is unlikely that the effects of vibration in situations where trains simultaneously pass a multileveled tunnel crossing have been appropriately considered in the phase of planning and design. This study investigates the superposition characteristic of ground-born vibrations from a multileveled tunnel crossing. The results from model tests and numerical analysis show that the ground-born vibration can be amplified by a maximum of about 30% compared to that resulting from the existing single tunnel. Numerical parametric study has also shown that the vibration amplification effect increases as the ground stiffness, the tunnel depth, and the distance between tunnels decrease. | ||
| Key Words | ||
| train-induced vibration; tunnel crossing; vibration superposition; model test; numerical analysis | ||
| Address | ||
| Hoon-Ki Moon: Dasan consultants, Songi-ro 30-gil, Songpa-gu, Seoul 05800, Republic of Korea ang-Hyun Kim and Jong-Ho Shin: Department of Civil Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea Ho-Jong Kim: Disaster Prevention Research Division, National Disaster Management Research Institute, Ulsan, Republic of Korea | ||