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2025 Vol.41, Issue 4 Preview Page
Development of a Rainfall Simulation Device for Centrifuge Model Experiments and Evaluation of Infiltration Behavior on Slopes during Extreme Rainfall

원심모형실험용 강우장치 개발 및 극한강우시 사면내 침투거동 평가

Sung-Min Yun1
,
Yung-Jin Jeon2
,
Ki-Hyun Chung3
,
Jae-Hyun Kim4*
,
Byung-Su Kim5
,
Seong-wan Park6
윤 성민1
,
전 영진2
,
정 기현3
,
김 재현4*
,
김 병수5
,
박 성완6
1Member, Graduate Student, Dept. of Civil Engineering, Kangwon National Univ.
2Member, Senior Researcher, Institute of Industrial Technology, Kangwon National Univ.
3Graduate Student, Dept. of Civil Engineering, Kangwon National Univ.
4Member, Assistant Prof., Dept. of Civil Engineering, Kangwon National Univ.
5Member, Associate Prof., Dept. of Civil & Environmental Engineering, Dankook Univ.
6Member, Prof., Dept. of Civil & Environmental Engineering, Dankook Univ.
1정회원, 강원대학교 토목공학과 석사과정
2정회원, 강원대학교 산업기술연구소 선임연구원
3비회원, 강원대학교 토목공학과 박사과정
4정회원, 강원대학교 토목공학과 조교수
5정회원, 단국대학교 토목환경공학과 부교수
6정회원, 단국대학교 토목환경공학과 교수
*Corresponding Author
31 August 2025. pp. 129-144
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Abstract

Global warming, driven by continuous carbon emissions, has led to abnormal climate patterns worldwide and an increased frequency of extreme rainfall events. These extreme conditions raise the risk of slope failure by rapidly increasing pore water pressure within slopes, thereby necessitating effective mitigation measures. To quantitatively evaluate slope infiltration behavior under such extreme rainfall conditions, this study developed a rainfall simulator capable of reproducing rainfall intensities of up to 100 mm/h in centrifuge model tests. The performance of the device was verified under 1 g and N g conditions. Using the developed simulator, infiltration behavior during rainfall was assessed on an infinite sandy slope. In addition, the study evaluated the penetration resistance characteristics of slopes protected with a hydrophobic treatment, an innovative slope protection technique. The results confirmed that the developed rainfall simulator accurately reproduced extreme rainfall scenarios, and the application of the hydrophobic treatment effectively delayed infiltration under these conditions.

Keywords
Abnormal climate
Centrifuge
Extreme rainfall
Hydrophobic material
Rainfall device

지속적인 탄소 배출로 인한 지구 온난화는 전 지구적 이상기후를 유발하며, 극한강우의 발생 빈도 또한 증가시키고 있다. 이는 사면 내 간극수압을 급격히 상승시켜 사면붕괴 위험을 높이므로 이에 대한 대응기법이 필요한 실정이다. 본 연구는 이러한 극한강우 조건에서 사면의 침투 거동을 정량적으로 평가하기 위해, 원심모형실험에서 최대 100mm/h의 강우를 재현할 수 있는 강우장치를 개발하고 1g 및 40g 조건에서 성능을 검증하였다. 또한, 개발된 강우장치를 이용해 사질토로 구성된 무한사면에서 강우시 침투거동을 실험적으로 평가하였다. 이때, 지반을 소수화(hydrophobic) 처리하여 사면을 보호하는 사면보호공법 적용 시 침투 저항특성을 함께 평가하였다. 실험 결과, 강우장치는 목표하는 극한강우를 상사법칙에 맞게 모사하였으며, 극한강우 환경에서 소수화기법 적용은 지반 침투 거동을 효과적으로 지연시키는 것을 확인하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 41
  • No :4
  • Pages :129-144
  • Received Date : 2025-07-07
  • Revised Date : 2025-08-01
  • Accepted Date : 2025-08-01
  • DOI :https://doi.org/10.7843/kgs.2025.41.4.129
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