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2025 Vol.24, Issue 4 Preview Page

Research Article

Structural Characteristics and Behavioral Analysis of a Buffer Net Applied to Debris Flow Protection Facilities

토석류 방호시설 적용을 위한 충격 흡수형 네트의 구조적 특성 및 거동 분석

Jongju Kim1
,
Chanyoung Park2
,
Dabin Kwon3
,
YoungSeok Kim4
,
Seungjoo Lee5
,
Yongseong Kim6*
김 종주1
,
박 찬영2
,
권 다빈3
,
김 영석4
,
이 승주5
,
김 용성6*
1Member, Researcher, Korea Railroad Technical Corporation, Gwacheon-daero 7na-gil, Gwacheon-si, Gyeonggi-do 13840, Republic of Korea 26466
2Member, Ph.D Candidate, Department of Regional Infrastructure Engineering, Kangwon National Univ., 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
3Member, Master’s Student, Department of Regional Infrastructure Engineering, Kangwon National Univ., 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
4Member, Senior Research Fellow, Department of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea
5Member, Researcher, Korean Peninsula Infrastructure Research Center, Department of Construction Policy Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea
6Member, Professor, Department of Regional Infrastructure Engineering, Kangwon National Univ., 1 Kangwondaehak-gil, Chuncheon, Gangwon-do 24341, Republic of Korea
*Corresponding Author
30 December 2025. pp. 53-64
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Abstract

This study aims to evaluate the impact mitigation performance of net structures applied to debris-flow protection facilities, as debris-flow damages have increased due to recent episodes of extreme rainfall and the demand for protective facilities has consequently grown. Tensile tests were conducted on 16-mm-diameter, 2.0m long wire ropes, comparing the energy absorption capacity of conventional wire ropes with that of buffer-type wire ropes combined with extension springs (spring diameter: 15mm, spring constant: 69.4kN/m). In addition, free-fall numerical simulations were performed using the Abaqus program to analyze the impact response of conventional nets and shock-absorbing nets. The tensile test results indicate that the buffer-type wire rope exhibits approximately 1.76times higher energy absorption per unit length than the conventional wire rope. The numerical analysis further revealed that, under identical impact conditions, the maximum tensile force acting on the shock-absorbing net was reduced to about 25% of that of the conventional net, while the impact duration increased by approximately 60%. Therefore, the shock-absorbing net is considered a more effective and safer alternative for debris-flow protection facilities compared to conventional net systems.

Keywords
Debris flow
Wire rope
Buffer net
Tensile test
Numerical analysis

본 연구에서는 집중강우로 인한 토석류 피해 증가와 더불어 방호시설에 대한 필요성이 대두됨에 따라 토석류 방호시설에 주로 적용되는 네트 구조의 충격 저감 성능을 평가하기 위해 직경 16mm, 길이 2.0m 와이어로프와 직경 15mm, 상수 69.4kN/m의 인장스프링이 결합한 완충형 와이어로프의 에너지 흡수 능력을 인장실험을 통해 비교 분석하였다. 인장실험 결과, 완충형 와이어로프의 단위 길이당 에너지 흡수량은 일반 와이어로프보다 약 1.76배 크게 나타났으며, 수치해석 결과 충격 흡수형 네트는 동일한 충격조건에서 최대 인장력이 일반 네트의 약 25% 수준으로 감소하고 작용 시간은 약 60% 증가하는것으로 나타났다. 따라서 충격 흡수형 네트는 토석류 방호시설에 적용할 경우 일반 네트에 비해 보다 높은 안전율을 확보할 수 있는 방호 대안으로 판단된다.

References
1

Choi, G., Son, J. I. and Joo, Y. T. (2016), “Design Method of Buffer-Type Debris Flow Protection Using Compression Spring”, Proceedings of Korean Society of Road Engineers Conference, Vol.2016, No.6, p.111.

2

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3

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 24
  • No :4
  • Pages :53-64
  • Received Date : 2025-11-19
  • Revised Date : 2025-12-14
  • Accepted Date : 2025-12-19
  • DOI :https://doi.org/10.12814/jkgss.2025.24.4.053
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