한국지반신소재학회논문집 (Journal of the Korean Geosynthetics Society)

  • 제14권1호
  • /
  • Pages.59-65
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  • 2015
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  • 2508-2876(pISSN)
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  • 2287-9528(eISSN)
한국지반신소재학회 (Korean Geosynthetics Society)
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TDR의 함수비 예측을 위한 새로운 보정방정식

A New Calibration Equation for Predicting Water Contents With TDR

  • Song, Minwoo (Department of Civil Engineering, Chosun Univ.) ;
  • Kim, Daehyeon (Department of Civil Engineering, Chosun Univ.) ;
  • Choi, Chanyong (High Speed Railway Research Division, Korea Railroad Research Institute)
  • 투고 : 2015.03.12
  • 심사 : 2015.03.25
  • 발행 : 2015.03.30
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초록

TDR을 이용한 흙의 건조밀도와 함수비의 새로운 보정 방정식을 검증하기 위해 본 연구를 수행하였다. 기존의 보정 방정식이 제안되고 몇몇 연구자들에 의해 새로운 보정 방정식을 개발하는 연구가 진행되고 있다. 기존의 보정 방정식이 함수비가 높은 세립토와 느슨한 토질에서는 적용되기 어려워 새로운 보정 방정식을 개발하였다. 이에 따라 본 연구에서는 새로운 보정 방정식을 소개하고 기존의 실험과 비교해 새로운 보정방정식의 국내지반과의 적용성을 검토를 수행하였다. 그 결과 함수비의 보정방정식에 오차가 발생하여 함수비의 새로운 보정방정식을 개발하였고, 개발한 보정방정식을 검토한 결과 95%이상의 정확도를 보여준다.

The objective of the study is to verify a new calibration equation of dry density and water contents with TDR. Since the traditional calibration equation was proposed, some research to develop a new calibration equation has been conducted by several researchers. As traditional calibration equation is difficult to be applied for loose soil and fine-grained soil at high water contents, this study developed a new calibration equation. Thus, this study introduces a new calibration equation and its applicability by comparing TDR test results with conventional test results. Based on the analyses, the calibration equation for water content has large error. A new calibration equation was proposed and it showed more than 95% accuracy for estimating water content of soil.

키워드

참고문헌

  1. Daita, R K. (2005). "Family of Compaction Curves for Chemically Modified Soils", Thesis in partial fulfillment of the Requirements for the Master of Science, Purdue University, p.50.
  2. Dirksen, C. and Dasberg, S. (1993), "Improved Calibration of Time Domain Reflectometry Soil Water Content Measurements", Soil Science Society of America Journal, Vol.57, pp.660-667. https://doi.org/10.2136/sssaj1993.03615995005700030005x
  3. Drnevich, V. P., Ashmawy, A. K., Yu, X., and Sallam, A. M. (2005). "Time Domain Reflectometry for water content and density of soils: study of soildependent calibration constants" Canadian Geotechnical Journal, Vol.42.
  4. Fellner-Fedegg, H. (1969), "The Measurement of dielectrics in the time domain." J. Phys. Chem., Vol.73, No.3, pp.616-623. https://doi.org/10.1021/j100723a023
  5. Jung, S., Drnevich, V., and Abou Najm, M. (2013). "New Methodology for Density and Water Content by Time Domain Reflectometry", Journal of Geotechnical and Geoenvironmental Engineering, Vol.139, No.5, pp.659-670. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000783
  6. Lin, C. P. (1999). "Time Domain Reflectometry for Soil Properties", Dissertation in partial fulfillment of the Requirements for the Degree Doctor of Philosity, Purdue University, p.226.
  7. Malicki, M. A., Plagge, R. and Roth, C. H. (1996), "Improving the Calibration of Dielectric TDR Soil Moisture Determination Taking into Account the Solid Soil", European Journal of Soil Science, Vol.47, pp.357-366. https://doi.org/10.1111/j.1365-2389.1996.tb01409.x
  8. Rhoades, J. D. and J. van Schifgaarde. (1976), "An Electrical Conductivity Probe for Determining Soil Salinity", Soil Science Society of America Journal, Vol.40, pp.647-651. https://doi.org/10.2136/sssaj1976.03615995004000050016x
  9. Roth, C. H., Malicki, M. A. and Plagge, R. (1992), "Empirical Evaluation of the Relationship Between Soil Dielectric Constant and Voumetric Water Content as the Basis for Calibrating Soil Moisture Measurements by TDR" Journal of Soil Science, Vol.43, pp.1-13. https://doi.org/10.1111/j.1365-2389.1992.tb00115.x
  10. Sallam, Amr M., White, Newel K. and Ashmawy, Alaa K. (2004), "Evalauation of the Purdue TDR Method for Soil Water Content and Density Measurement", Final Report the the Florida Department of Transportation, Contract No. BC 353 30. April 2004.
  11. Siddiqui, S. I., and Drnvich, V. P. (1995), "Use of Time Domain Reflectometry for determination of water content and density of soil", FHWA/IN/JHRP-95-9, Purdue University, West Lafayette, IN.
  12. Topp, G. C., Davis, J. L., and Annan, A. P. (1980), "Electromagnetic determination of soil water content: measurements in coaxial transmission lines." Water Resour. Res., Vol.16, No.3, pp.574-582. https://doi.org/10.1029/WR016i003p00574
  13. Yu, X., and Drnevich, V. P. (2004), "Soil water content and dry density by Time Domain Reflectometry", Journal of Geotechnical and Geoenvironmental Engineering, Vol.130, No.9, pp.922-934. https://doi.org/10.1061/(ASCE)1090-0241(2004)130:9(922)
  14. Zambrano, C. E. (2006), "Soil type identification using Time Domain Reflectometryt", MS thesis, Purdue University, West Lafayette, IN.