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2023 Vol.33, Issue 4 Preview Page

Research Article

Experimental Study on Establishing Measurement Management Criteria for Soil Slope Failure by Using Reduction-Scale and Full-Scale Slope Experiments: Based on Matric Suction

소형 및 실규모 급경사지 실험을 통한 계측관리기준 개발을 위한 실험적 연구: 모관흡수력을 기준으로

Hyo-Sung Song1
,
Young-Hak Lee1
,
Seung-Jae Lee2
,
Jae-Jung Kim3*
송 효성1
,
이 영학1
,
이 승재2
,
김 재정3*
1Senior Researcher, Geotechnical Disaster Research Team, Disaster Prevention Assessment Center, National Disaster Management Research Institute
2Researcher, Geotechnical Disaster Research Team, Disaster Prevention Assessment Center, National Disaster Management Research Institute
3Research Officer, Geotechnical Disaster Research Team, Disaster Prevention Assessment Center, National Disaster Management Research Institute
1국립재난안전연구원 방재기준평가센터 지반재난연구팀 선임연구원
2국립재난안전연구원 방재기준평가센터 지반재난연구팀 연구원
3국립재난안전연구원 방재기준평가센터 지반재난연구팀 시설연구사
*Corresponding Author
31 December 2023. pp. 555-571
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Abstract

Due to South Korea’s concentrated summer rainfall, constituting 70% of the annual total, landslides frequently occur during the rainy season, necessitating accurate prediction methods to mitigate associated damage. In this study, a reduced-scale and full-scale slope was configured using weathered granite soil to find the possibility of establishing measurement management criterias through landslide reproduction. The experiment focused on matric suction, analyzing changes in ground properties and failure patterns caused by rainfall infiltration. Subsequently, an unsaturated infinite slope stability analysis was conducted. By calculating the failure time when the safety factor falls below 1 for each experiment, landslide prediction was demonstrated to be possible, approximately 17 minutes prior for the reduction-scale experiment and 6.5 hours for the full-scale experiment. These findings provide useful data for establishing Korean soil slope measurement management criteria that consider the characteristics of weathered granite soil.

Keywords
reduction-scale experiment
full-scale experiment
weathered granite soil
measurement management criteria
matric suction

우리나라는 연평균 강수량의 70%에 달하는 여름철 강우로 인해 산사태가 자주 발생하고 있으며, 이로 인한 피해 완화를 위해서는 정확한 예측기법이 필요하다. 본 연구에서는 화강암 풍화토를 이용하여 소형 및 실규모 실험을 통한 계측관리기준 수립 가능성을 모색하였다. 실험은 모관흡수력을 중점으로 강우침투로 인한 지반 특성 변화와 사면붕괴 패턴을 분석하였으며, 이 결과를 기초로 불포화 무한사면 안정성 해석을 수행하였다. 안전율이 1 미만으로 떨어지는 조건에서 붕괴도달 시간을 산정한 결과, 소형 실험의 경우 약 17분 전, 실규모 실험의 경우 약 6.5시간 전으로 산사태 예측이 가능한 경향을 나타냈다. 이러한 연구 결과는 화강암 풍화토의 특성을 고려한 계측관리기준을 확립하는데 유용한 자료로 활용될 수 있다.

키워드
소형 급경사지 실험
실규모 급경사지 실험
화강암 풍화토
계측관리기준
모관흡수력
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 33
  • No :4
  • Pages :555-571
  • Received Date : 2023-10-16
  • Revised Date : 2023-12-07
  • Accepted Date : 2023-12-09
  • DOI :https://doi.org/10.9720/kseg.2023.4.555
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