Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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An Experimental Analysis for the Stability Investigation of Slope on Saemangeum Lake Dykes

새만금 방수제 축조사면의 안정성 검토를 위한 실험적 분석

  • Jang, Dong-Gi (Dept. of Geotechnical Engineering, Daehan Consultants Co., Ltd.) ;
  • Kim, Ki-Nyun (KEPCO Engineering & Construction Co., Inc.) ;
  • Kim, Dong-Hwan (Dept. of Geotechnical Engineering, Daehan Consultants Co., Ltd.) ;
  • Seo, Kwan-Seok (Dept. of Geotechnical Engineering, Daehan Consultants Co., Ltd.) ;
  • Son, Moon-Joon (Dept. of Geotechnical Engineering, Daehan Consultants Co., Ltd.)
  • 장동기 ((주)대한콘설탄트 지반공학부) ;
  • 김기년 (한국전력기술(주)) ;
  • 김동환 ((주)대한콘설탄트 지반공학부) ;
  • 서관석 ((주)대한콘설탄트 지반공학부) ;
  • 손문준 ((주)대한콘설탄트 지반공학부)
  • Published : 2010.09.09
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Abstract

This study was designed to carry out studies on critical seepage velocity and critical hydraulic gradient using a piping test targeting SM and ML which are widely distributed ahead of and behind the depth of E.L(-)10m in Saemangeum area in order to examine stability of embankment built on the ground vulnerable to piping. The effects of relative densities on critical hydraulic gradient and critical velocity were also compared and analyzed using empirical formula and theoretical formula, and relative densities were set up as respectively 9%, 25%, 50%, and 75% for this experiment. As a result, for critical hydraulic gradient, most of specimens detected piping at lower values than the empirical formula of Terzaghi(1922). It is, therefore, considered that the empirical formula devised by Kalin(1977) or Hayashi(1978) is more reasonable to be conservative. It was also found that critical velocity decreased as relative density increased, and critical velocity predicted was mostly lower than the theoretical formula.

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