Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Seepage Analysis of Weathered Granite Model Embankment Using TDR Sensor

분포형 TDR센서를 이용한 화강풍화토 대형모형제방의 침투거동 해석

  • Kim, Jin-Man (Geotechnical Engrg. Research Division, Korea Institute of Construction Technology) ;
  • Park, Min-Cheol (Dept., of Civil Engrg., Kumoh National Institute of Technology) ;
  • Jo, Won-Beom (Geotechnical Engrg. Research Division, Korea Institute of Construction Technology) ;
  • Han, Heui-Soo (Dept., of Civil Engrg., Kumoh National Institute of Technology)
  • 김진만 (한국건설기술연구원 Geo-인프라연구실) ;
  • 박민철 (금오공과대학교 토목공학과) ;
  • 조원범 (한국건설기술연구원 Geo-인프라연구실) ;
  • 한희수 (금오공과대학교 토목공학과)
  • Received : 2013.06.04
  • Accepted : 2014.03.10
  • Published : 2014.03.31
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Abstract

In this study, the seepage behavior has been analyzed, which is the most important in determining the stability of the embankment. Large-scale embankment of weathered granite has been installed and TDR (time domain reflectory) sensors were used to detect the seepage lines. The TDR graphs could be separated into 3 sections, which are initial, unsaturated and saturated zones. TDR sensor can detect seepage line more easily than point sensor without analysis. Comparisons of the results of numerical analyses and the TDR sensors showed differences at water level rising condition, and then Comparisons of the results generally showed good agreement at another condition.

본 연구에서는 제방의 안정성 판단에 가장 중요한 침투거동을 파악하기 위하여 대형모형제방 실험을 수행하였다. 화강풍화토로 대형모형제방을 축조하고 분포형 TDR센서를 설치하여 침투거동을 파악하였다. TDR그래프(전기적 파형)는 3단계의 직선구간으로 간략화하여 나타낼 수 있으며 상부부터 건조 또는 초기영역, 중간부의 침투에 의한 불포화영역, 하부는 침투에 의한 포화영역으로 나타난다. 이를 이용하면 별도의 정량화 과정을 거치지 않고도 지점형 센서에 비해 제체 내의 침윤선을 쉽게 파악할 수 있다. 분포형 TDR센서에 의한 침윤선과 수치해석 결과와 비교하면, 초기에는 TDR센서의 측정 결과와 차이가 있으나 시간이 지날수록 결과가 일치하는 양상을 보여준다.

Keywords

References

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