• Title/Summary/Keyword: 해저 터널

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Dynamic Numerical Modeling of Subsea Railway Tunnel Based on Geotechnical Conditions and Seismic Waves (지반조건과 지진파를 고려한 해저철도 터널의 동적 수치 모델링)

  • Kwak, Chang-Won;Yoo, Mintaek
    • Journal of the Korean Geotechnical Society
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    • v.38 no.11
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    • pp.69-86
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    • 2022

  • The railway is widely used to transport passengers and freight due to its punctuality and large transport capacity. The recent remarkable development in construction technology enables various subsea railway tunnels for continent-continent or continent-island connectivity. In Korea, design and construction experience is primarily based on the successful completion of the Boryeong subsea tunnel (2021) and the Gadeok subsea tunnel (2010). However, frequent earthquakes with diverse magnitudes, globally induced and continuously increased the awareness of seismic risks and the frequency of domestic earthquakes. The effect of an earthquake on the subsea tunnel is very complicated. However, ground conditions and seismic waves are considered the main factors. This study simulated four ground types of 3-dimensional numerical models, such as soil, rock, composite, and fractured zone, to analyze the effect of ground type and seismic wave. A virtual subsea railway shield tunnel considering external water pressure was modeled. Further, three different seismic waves with long-term, short-term, and both periods were studied. The dynamic analyses by finite difference method were performed to investigate the displacement and stress characteristics. Consequently, the long-term period wave exhibited a predominant lateral displacement response in soil and the short-term period wave in rock. The artificial wave, which had both periodic characteristics, demonstrated predominant in the fractured zone. The effect of an earthquake is more noticeable in the stress of the tunnel segment than in displacement because of confining effect of ground and structural elements in the shield tunnel. 

  • https://doi.org/10.7843/kgs.2022.38.11.69 인용 PDF KSCI

해저터널-설계편

  • Hwang, Yeong-Cheol
    • Magazine of korean Tunnelling and Underground Space Association
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    • v.12 no.1
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    • pp.13-18
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    • 2010

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