Journal of Korean Society of Coastal and Ocean Engineers (한국해안해양공학회지)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Numerical Experiments of Dynamic Wave Pressure Acting on the Immersed Tunnel on Seabed Foundation

해저지반 상부에 설치된 침매터널에 작용하는 동수압에 관한 수치실험

  • Hur Dong Soo (Institute of marine industry, Department of Civil and Environmental Engineering, Gyeongsang National University) ;
  • Kim Chang Hoon (Department of Construction and Environmental Engineering, Korea Maritime University) ;
  • Yeom Gyeong Seon (Department of Civil and Environmental Engineering, Gyeongsang National University) ;
  • Kim Do Sam (Department of Construction and Environmental Engineering, Korea Maritime University)
  • 허동수 (경상대학교 토목환경공학부 해양산업연구소) ;
  • 김창훈 (한국해양대학교 건설환경공학부) ;
  • 염경선 (경상대학교 토목환경공학부) ;
  • 김도삼 (한국해양대학교 건설환경공학부)
  • Published : 2005.12.01
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Abstract

Most immersed tunnels investigated have been investigated based on the engineer's experience with design and construction. From engineering point of view, it is very important to understand the wave interaction with the seabed and immersed tunnel, since the stability of an immersed tunnel depends largely on the behavior of the seabed foundation. In this study, for the first stage research to find out the mechanism of the wave interaction with the seabed and immersed tunnel, the benchmarking method called as direct numerical simulation (DNS) was employed to analyze comprehensively the wave-induced pore water pressures, vorticity and flows in seabed or inside rubble stone around the immersed tunnel. The immersed tunnel is modeled based on Busan-Geoje fixed link project in Korea, which is now on the stage of planning. Moreover, the nonlinear water wave interaction with an immersed tunnel/its seabed foundation was thoroughly examined with regard to the stabilities of the immersed tunnel subjected to various water wave conditions, median grain size and so forth.

지금까지 침매터널에 대한 대부분의 연구들은 건설기술자의 경험에 바탕을 둔 연구들이었다. 공학적인 관점에서 파랑하중에 의한 침매터널의 안정성은 지반기초의 거동에 큰 영향을 받으므로 파${\cdot}$지반${\cdot}$침매터널의 상호작용에 대한 이해는 매우 중요하다. 본 연구에서는 파${\cdot}$지반${\cdot}$침매터널의 상호작용의 메커니즘에 대한 이해를 위하여 부산-거제간 연결도로 민간투자사업 구간 중 침매터널 구간에 직접수치해석기법을 적용하여 침매터널 주변의 지반 및 피복층 내에서 파랑하중에 의한 간극수압, 와도 및 흐름의 특성을 종합적으로 살펴보았다. 또한 다양한 파랑조건 및 피복층의 평균입경변화에 따른 비선형성의 파랑과 침매터널 및 지반의 상호작용이 침매터널의 안정성과 관련하여 논의되었다.

Keywords

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