Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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Analysis on Effect of Debris Flow Energy Mitigation by Arrangement of Cylindrical Countermeasures

원통형 토석류 대책구조물의 배치조건에 따른 에너지 저감효과 분석

  • Kim, Beomjun (Department of Civil Engineering, Gangneung Wonju National University) ;
  • Cho, Heungseok (Department of Civil Engineering, Gangneung Wonju National University) ;
  • Han, Kwangdo (Department of Water Resources, ISAN Corporation) ;
  • Choi, Clarence E. (Department of Civil Engineering, The University of Hong Kong) ;
  • Yune, Chanyoung (Department of Civil Engineering, Gangneung Wonju National University)
  • Received : 2019.07.12
  • Accepted : 2019.09.18
  • Published : 2019.10.01
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Abstract

In this study, in order to analyze the effect of cylindrical baffles on the debris flow energy, small-scale tests were conducted using a flume with cylindrical baffles. Various row numbers of installed baffles were considered as a test condition. To investigate the scale effect of debris flow and cylindrical baffles on flow characteristics, large-scale tests were also performed according to varying row numbers of baffle for same baffle configuration with small-scale tests. Both small- and large-scale test results showed that the increase of row number of baffle increase the energy dissipation effect due to reduction of the velocity and flow depth of debris flow.

본 연구에서는 원통형 대책구조물의 설치조건에 따른 토석류의 에너지 저감효과를 분석하기 위해, 원통형 대책구조물을 설치 가능한 소형 수로를 제작하고 구조물의 종방향 설치 수를 변화시켜가면서 실내모형실험을 수행하였다. 또한 토석류와 대책구조물의 크기변화가 흐름특성에 미치는 영향을 확인하기 위해, 대형수로 내에서 소형수로 실험과 동일한 종방향 구조물을 배치하고, 토석류와 대책구조물의 크기를 증가시켜 실험을 수행하였다. 소형 및 대형수로 실험결과, 원통형 대책구조물의 설치 개수가 증가는 토석류의 유속과 흐름깊이를 감소시켜, 토석류의 에너지 저감효과를 증가시키는 것으로 나타났다.

Keywords

References

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