한국방재안전학회논문집 (Journal of Korean Society of Disaster and Security)

  • 제16권4호
  • /
  • Pages.9-18
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  • 2023
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  • 2466-1147(pISSN)
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  • 2508-285X(eISSN)
한국방재안전학회 (Korean Society of Disaster & Security)
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3차원 수치모델을 활용한 호안 블록 형상에 따른 하도 내 유속 분석

Analysis of Flow Velocity in the Channel according to the Type of Revetments Blocks Using 3D Numerical Model

  • 김동현 (홍익대학교 건설환경공학과) ;
  • 양수현 ((주)하이드로봇 수환경사업부) ;
  • 주성식 ((주)헥코리아 수자원환경사업부) ;
  • 이승오 (홍익대학교 건설환경공학과)
  • Dong Hyun Kim (Department of Civil and Environmental Engineering, Hongik University) ;
  • Su-Hyun Yang (Department of Water Environment, HydroBot) ;
  • Sung Sik Joo (Department of Water Resource and Environment, HECOREA) ;
  • Seung Oh Lee (Department of Civil and Environmental Engineering, Hongik University)
  • 투고 : 2023.11.28
  • 심사 : 2023.12.27
  • 발행 : 2023.12.31
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초록

기후변화는 외수침수와 연관이 있는 하천제방 안전성에도 영향을 미친다. 제방의 안전성을 높이기 위해 비탈면 보강에 대한 연구가 활발히 수행되어왔다. 특히 최근에는 순환자원을 재활용하여 호안블록을 제작하는 기술 등이 개발되고 있다. 그러나 호안블록의 재료적인 측면의 연구와 더불어 블록 형상에 의해 제외지의 흐름특성에 미치는 영향을 분석하는 것이 필요하다. 따라서 본 연구에서는 호안블록의 형상에 따라 호안면의 유속 등 수리학적 특성의 영향을 3차원 수치모의를 통해 수행하였다. 호안 블록 형상은 3가지 형상을 제안하였고, 이상적인 하천 수로에 블록을 설치하여 수치해석을 수행하였다. 3차원 수치해석은 FLOW-3D를 사용하였고, 호안블록의 형상에 따른 최대유속, 호안부의 바닥유속, 최대 전단응력의 변화를 분석하였다. 그 결과, 자연석형 식생블록인 블록 A가 요철의 크기와 규모가 불규칙하여 호안에 연결하여 설치할 경우 호안 블록 B, C보다 호안 설치구간의 유속변화가 가장 큰 것으로 분석되었다. 향후 하천의 지형적 특성을 고려한다면 현장적용성을 고려한 호안블록 설계를 수행할 수 있을 것으로 기대된다.

Climate change affects the safety of river revetments, especially those associated with external flooding. Research on slope reinforcement has been actively conducted to enhance revetment safety. Recently, technologies for producing embankment blocks using recycled materials have been developed. However, it is essential to analyze the impact of block shapes on the flow characteristics of exclusion zones for revetment safety. Therefore, this study investigates the influence of revetment block shapes on the hydraulic characteristics of revetment surfaces through 3D numerical simulations. Three block shapes were proposed, and numerical analyses were performed by installing the blocks in an idealized river channel. FLOW-3D was used for the 3D numerical simulations, and the variations in maximum flow velocity, bed velocity beneath the revetment, and maximum shear stress were analyzed based on the shapes of the revetment blocks. The results indicate that for irregularly sized and spaced revetment blocks, such as the natural stone-type vegetation block (Block A), when connected to the revetment in an irregular manner, the changes in flow velocity in the revetment installation zone are more significant than those for Blocks B and C. It is anticipated that considering the topographical characteristics of rivers in the future will enable the design of revetment blocks with practical applicability in the field.

키워드

과제정보

This research was supported by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2021R1A2C2013158).

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