Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Estimation of Undrained Shear Strength of Very Soft Clay with the Slump Test

슬럼프 실험에 의한 초연약점토의 비배수전단강도 산정

  • Noh, Tae-Kil (Dept. of Civil Engrg., The Univ. of Seoul) ;
  • Lee, Song (Dept. of Civil Engrg., The Univ. of Seoul)
  • 노태길 (서울시립대학교 토목공학과) ;
  • 이송 (서울시립대학교 토목공학과)
  • Published : 2009.02.28
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Abstract

Undrained shear strength is estimated from laboratory tests generally, but the very soft or fluid material is generally incompatible with the test setup. In-situ methods require test to be accomplished at discrete time intervals, which does not provide a method to predict strength increment as a function of time for an ongoing project. Therefore, correlation between slump test value and undrained shear strength was derived through the regression analysis of slump test and laboratory vane shear test results. For the reliability of derived correlation equation statistical analysis using the t-distribution was performed and the comparison between the results of in-situ test and laboratory experiments demonstrated the applicability of the derived correlation.

일반적으로 점토의 비 배수전단강도 산정은 실내실험을 통해 구하지만 초연약점토의 경우 재료의 특성 상 실내실험이 어렵고, 현장실험 또한 여러 제약조건들을 감수해야 한다. 따라서 본 논문에서는 실내에서 수행한 물성실험 및 슬럼프실험과 실내 베인 전단실험의 결과를 회귀분석을 통해 슬럼프 값과 비 배수전단강도 사이의 상관 관계식을 도출하였다. 도출된 상관 관계식의 신뢰성 확보를 위하여 t-분포를 이용한 통계분석을 실시하였고 현장의 데이터와 비교 분석하여 관계식의 적용성 및 신뢰성을 확보하였다.

Keywords

References

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