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Evaluation of Hydraulic Conductivity Function in Unsaturated Soils using an Inverse Analysis

역해석기법을 이용한 불포화토 투수계수함수 산정에 관한 연구

  • 이준용 (한국건설기술연구원 Geo-인프라연구실) ;
  • 한진태 (한국건설기술연구원 Geo-인프라연구실)
  • Received : 2013.01.07
  • Accepted : 2013.04.16
  • Published : 2013.07.31

Abstract

Unsaturated hydraulic conductivity function is one of key parameters to solve the flow phenomena in problems of landslide. Prediction models for hydraulic conductivity function related to soil-water retention curve equations in many geotechnical applications have been still used instead of direct measurement of the hydraulic conductivity function since prediction models from soil-water retention curve equations are attractive for their fast and easy use and low cost. However, many researchers found that prediction models for the hydraulic conductivity function can not predict the hydraulic conductivity exactly in comparison with experimental outputs. This research introduced an inverse analysis to evaluate the hydraulic conductivity function corresponding to experimental output from the flow pump system. Optimisation process was carried out to obtain the hydraulic conductivity function. This research showed that the inverse analysis with flow pump system was suitable to assess the hydraulic conductivity in unsaturated soil, and the prediction models for the hydraulic conductivity were led to the significant discrepancy from actual experimental outputs.

Acknowledgement

Grant : 지진시 사면붕괴 등 지반피해 예측기술개발

Supported by : 소방방재청

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