Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Predicted Hydraulic Behavior in In-Situ Soil Slope Using the Path-Dependent Soil Water Characteristic Curve

불포화 함수특성의 경로의존성을 고려한 현장사면 수리거동 예측

  • Park, Hyun Su (Dept. of Civil & Environmental Eng., Dankook Univ.) ;
  • Song, Young-Suk (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Park, Seong-Wan (Dept. of Civil & Environmental Eng., Dankook Univ.)
  • 박현수 (단국대학교 토목환경공학과) ;
  • 송영석 (한국지질자원연구원) ;
  • 박성완 (단국대학교 토목환경공학과)
  • Received : 2017.02.24
  • Accepted : 2017.04.17
  • Published : 2017.04.30
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Abstract

The soil-water characteristics is the most important state parameter for understanding changes in suction and water contents of unsaturated soil slopes. In the field, the hysteretic behaviors of drying and wetting soil-water characteristic curve are real and the adoption of path-dependent suction-water content is needed to predict the hydro-mechanical analysis of unsaturated soils. In this study, in-situ monitored hydraulic behavior of various soil slopes are compared with the data from numerical analysis with the laboratory soil water characteristic curve. Then, the verifications are performed based on the field monitored data respectively. Therefore, the use of path-dependent soil-water characteristic curves could be more rational for design and analysis of unsaturated soil slopes under rainfall conditions.

불포화상태 지반의 흡수력과 응력변화를 반영한 토사사면의 전체 안정성 평가에서 매우 중요한 상태평가 입력변수로 함수특성곡선이 활용되고 있다. 함수특성의 경로의존성은 일반적으로 건조와 습윤과정으로 이력현상을 내포하는데 현장계측결과는 주로 실내실험의 습윤과정에 가깝게 나타난다. 본 연구에서는 이를 비정상류 해석에 적용하여 해석과 현장 계측된 결과들을 비교 검토하였다. 또한 심도가 증가할수록 강우의 영향이 작고 습윤과정을 적용해 산정된 값에 근접하였다. 따라서 불포화 토사사면 해석 시에 경로의존 함수특성곡선을 적용하여 안정성을 판단하는 것이 보다 합리적인 결과로 판단된다.

Keywords

References

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