Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Experimental Study on the Effect of Arrangement of Cylindrical Countermeasures on Debris Flow Impact Load

원통형 대책구조물의 배치조건에 따른 토석류의 충격하중에 대한 실험적 연구

  • Cho, Heungseok (Dept. of Civil Engrg., Gangneung-Wonju National Univ.) ;
  • Kim, Beomjun (Dept. of Civil Engrg., Gangneung-Wonju National Univ.) ;
  • Yune, Chanyoung (Dept. of Civil Engrg., Gangneung-Wonju National Univ.)
  • 조흥석 (강릉원주대학교 토목공학과) ;
  • 김범준 (강릉원주대학교 토목공학과) ;
  • 윤찬영 (강릉원주대학교 토목공학과)
  • Received : 2020.10.23
  • Accepted : 2020.11.03
  • Published : 2020.11.30
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Abstract

In this study, to investigate the effect of the array of cylindrical baffles on debris flow impact load, a series of small-scale tests were conducted according to varying row numbers of installed baffles in the flume. After the test, the behavior of debris flow interacting with baffles during the flow process was investigated. Based on the results, the influence varying velocity and flow depth on Froude number and dynamic pressure coefficient were analyzed. Test results showed that the greatest peak impact load occurred at the second row of baffle arrays. The dynamic pressure coefficient was also estimated by suggested equation and compared with previous studies.

본 연구에서는 원통형 대책구조물의 배치조건에 따라 각각의 대책구조물에 작용하는 토석류의 충격하중을 확인하기 위해, 대책구조물이 설치가 가능한 소형수로에서 대책구조물의 종방향 배열 수를 변화시켜가면서 실내모형실험을 수행하였다. 이를 바탕으로 토석류의 충격하중에 따른 흐름특성을 확인하고, 속도 및 흐름깊이에 따른 프루드 수와 동적압력계수를 분석하였다. 실험결과, 모든 조건에서 두 번째 대책구조물에서 최대충격하중이 가장 컸으며, 기존의 연구와 비교하여 동적압력계수 산정방법을 제안하고 그 값을 비교 분석하였다.

Keywords

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