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2023 Vol.16, Issue 4

Original Article

The Experimental Study for Variance of Sediment Volume Concentration of Debris Flow due to Damped Structures

감쇠 구조물에 의한 토석류 토사체적 농도 변화에 관한 실험적 연구

Youngdo Choi1
,
Sungduk Kim2
,
Hojin Lee3*
최 영도1
,
김 성덕2
,
이 호진3*
1Graduated Student, School of Civil Engineering, Chungbuk National University
2Instructor, School of Civil Engineering, Chungbuk National University
3Professor, School of Civil Engineering, Chungbuk National University
1충북대학교 토목공학부 대학원생
2충북대학교 토목공학부 강사
3충북대학교 토목공학부 교수
*Corresponding Author
31 December 2023. pp. 1-7
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Abstract

The purpose of this study is an experimental research to investigate the effectiveness of debris flow reduction structures when a debris flow disaster occurs on a steep slope. The control structure for debris flow took the form of baffle, and the soil deposition area and soil runout distance due to debris flow from the downstream were investigated according to the installation number of baffle and each specification. As the slope of the channel became steeper, the sediment deposition area and runout distance increased, and as the sediment volume concentration decreased, the sediment deposition area and runout distance increased. When the sediment concentration was low, differences appeared depending on the slope of the channel because the debris flow had a high liquid content. Overall, the larger the sediment volume concentration, the greater the decrease in sediment deposition area and soil runout distance. As the number of baffles increases, the soil deposition area and runout decrease, showing that the baffles have the ability to control debris flows. The results of this research will provide good information when installing attenuation or control structures when sediment disasters occur in steep slopes.

Keywords
Debris flow
Baffles
Reduction structure
Deposition area
Runout distance

본 연구의 목적은 급경사지 사면에서 토석류 재해가 발생했을 때, 토석류 저감 구조물의 효과를 조사한 실험연구이다. 제어 구조물로는 베플 형태를 취하였고, 베플의 설치 기수와 각 제원에 따라서 하류에서의 토석류에 의한 토사퇴적면적과 토사도달거리를 조사한 것이다. 수로의 경사가 급할수록 토사의 퇴적면적과 도달거리가 증가하였고, 토사체적농도가 감소할수록 토사퇴적면적과 토사의 도달거리가 증가하였다. 토사농도가 작은 경우(Cv = 0.5)는 토석류의 액성이 크기 때문에 수로 경사에 따른 차이가 나타났고, 전반적으로 토사체적농도가 클수록 토사퇴적면적과 토사의 도달거리 감소율이 크게 나타났다. 베플의 수를 증가할수록 토사퇴적면적과 도달거리를 약 5~10% 이상 감소하는 것으로 나타남으로서 베플의 토석류 제어능력이 있음을 보여주고 있다. 본 연구의 결과는 급경사지에서 토사재해가 발생할 때 감쇠 또는 제어 구조물을 설치할 때 중요한 정보를 제공할 것이다.

키워드
토석류
베플
저감구조물
토사퇴적면적
도달거리
References
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2
Choi, Youngdo. (2022). Effect of Berms and Baffles on Deposition Characteristics of Debris Flow. Master Thesis. Chungbuk National University. 18-27.
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Korean References Translated from the English

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2
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Information
  • Publisher :Korean Society of Disaster and Security
  • Publisher(Ko) :한국방재안전학회
  • Journal Title :Journal of Korean Society of Disaster and Security
  • Journal Title(Ko) :한국방재안전학회 논문집
  • Volume : 16
  • No :4
  • Pages :1-7
  • Received Date : 2023-12-05
  • Revised Date : 2023-12-19
  • Accepted Date : 2023-12-19
  • DOI :https://doi.org/10.21729/ksds.2023.16.4.1
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