Safety Index Evaluation from Resistivity Monitoring Data for a Reservoir Dyke

전기비저항 상시관측에 의한 제체 안전도 지수 산출

  • Cho, In-Ky (Kangwon National University, Dept. Geophysics) ;
  • Kang, Hyung-Jae (Kangwon National University, Dept. Geophysics) ;
  • Lee, Byoung-Ho (Korea Rural Community & Agriculture Corporation) ;
  • Kim, Byoung-Ho (Korea Rural Community & Agriculture Corporation, Office of Environmental Geology) ;
  • Yi, Sang-Sun (Korea Rural Community & Agriculture Corporation, Office of Environmental Geology) ;
  • Park, Young-Gyu (Korea Rural Community & Agriculture Corporation, Office of Environmental Geology) ;
  • Lee, Bo-Hyun (Korea Rural Community & Agriculture Corporation, Office of Environmental Geology)
  • 조인기 (강원대학교 지구물리학과) ;
  • 강형재 (강원대학교 지구물리학과) ;
  • 이병호 (한국농촌공사 제주도본부) ;
  • 김병호 (한국농촌공사 환경지질사업처) ;
  • 이상선 (한국농촌공사 환경지질사업처) ;
  • 박영규 (한국농촌공사 환경지질사업처) ;
  • 이보현 (한국농촌공사 환경지질사업처)
  • Published : 2006.05.31


An abnormal seepage flow, which is mainly caused by the piping, is one of the major reasons for embankment dam failure. A leakage detection is therefore a vital part of an embankment dam's monitoring. Resistivity method, which is an efficient tool to detect leakage zones, has been used all over the world for an embankment dam's monitoring. Although the resistivity method gives us very useful information about the leakage problem, there is no more quantitative interpretation than the low resistivity zones in the 2-dimensional resistivity section are regraded simply as the anomalous seepage zones. Recently, resistivity monitoring technique is applied for the detection of leakage zones. However, its interpretation still remains in the stage of presenting the resistivity ratio itself. An increased seepage flow increases a porosity and an increasing porosity decreases the dam's stability. Therefore, the porosity is one of the major factors for an embankment dam's stability. Based on Archie's experimental formula, we try to evaluate a porosity distribution from the resistivity data which is obtained on the dam's crest. We also attempt to represent a procedure to evaluate a safety index of the embankment dam from the resistivity monitoring data.


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