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Seepage Analysis of Large-Scale Embankment Model by Revised TDR Sensor

개량된 TDR센서를 이용한 대형 모형제방의 침투 해석

  • Park, Min-Cheol (Dept. of Civil Engineering, Kumoh National Institute of Technology) ;
  • Lee, Jong-Wook (Infrastructure Technology Center, K-Water Institute, KOWACO) ;
  • Kim, You-Seok (Institute of Construction Technology, DAEWOO Engineering & Construction Co. Ltd.) ;
  • Han, Heui-Soo (Dept. of Civil Engineering, Kumoh National Institute of Technology)
  • 박민철 (금오공과대학교 토목공학과) ;
  • 이종욱 (수자원공사 기반시설연구소) ;
  • 김유석 (대우건설기술연구원) ;
  • 한희수 (금오공과대학교 토목공학과)
  • Received : 2012.07.04
  • Accepted : 2012.11.05
  • Published : 2012.11.28

Abstract

In this research, stainless steel and heat-shrinkage tube were used for new TDR sensing line to solve the problems of ordinary TDR system. The new TDR line improved the sensitivity of water content and endurance, and reduced the data noise. The saturation degree test and acryl model test were done by revised TDR sensor. From the results, without additional data filtering and quantitative analysis, the raw data were separated into 3 zones; saturated, unsaturated and dried zones easily. In addition, the revised TDR sensor was installed in large-scale embankment model to perform the seepage test. The raw data of the model tests showed the distributed seepage behaviors and separated zones clearly, which were almost the same tendencies as the lab test results.

본 논문에서는 기존에 사용되던 철선 TDR계측선의 문제점을 해결하기 위해 스테인리스 스틸과 열수축튜브를 이용해 개량된 TDR계측선을 개발하여, 함수비에 대한 민감도를 높이고 노이즈를 줄이며 내구성을 향상시켜 TDR시스템의 현장적용성을 높였다. 개량된 TDR계측선을 이용하여 실내에서 포화도 변화실험과 아크릴모형실험을 수행하였으며, 실험결과 별도의 필터링 및 정량화 과정을 거치지 않은 초기 계측 그래프만으로 쉽게 포화, 불포화 및 건조구간을 파악할 수 있었다. 이후 대형 모형제방에 개량된 TDR센서를 설치하여 침투실험을 수행하였으며 그 결과, 실내시험과 같은 명확한 지하수 분포형태 파악이 가능하였으며, 침투 시간경과에 따른 각 구간의 지하수 분포변화를 파악할 수 있었고 손쉽게 모형제방의 침윤선을 작도할 수 있었다.

Keywords

References

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