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

Korean Geotechnical Society (한국지반공학회)
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Slug Test Analysis in Vertical Cutoff Walls with Consideration of Filter Cake

연직차수벽에서 필터케익을 고려한 순간 변위시험 해석방법

  • Nguyen, The Bao (Dept. of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Lee, Chul-Ho (Dept. of Civil, Environmental and Architectural Engineering, Korea University) ;
  • Choi, Hang-Seok (Dept. of Civil, Environmental and Architectural Engineering, Korea University)
  • 웽테바오 (고려대학교 건축사회환경공학과) ;
  • 이철호 (고려대학교 건축사회환경공학과) ;
  • 최항석 (고려대학교 건축사회환경공학과)
  • Published : 2008.03.28
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Abstract

In constructing a slurry trench cutoff wall, a thin but relatively impermeable layer called filter cake can be formed on the excavation surface. The filter cake significantly influences the result of slug test analysis in the cutoff wall. This study is to examine the effect of filter cake on evaluating in situ hydraulic conductivity of the vertical cutoff wall along with slug test analyses. The numerical program Slug_3D was modified to take filter cake into account in the slug test simulation. With consideration of filter cake, the type curve method and the modified line-fitting method were used to reanalyze the case study taken from a landfill site. The previous results achieved by Choi and Daniel (2006b) without consideration of filter cake have been compared with the results in this study. The considerable difference between the two results shows the necessity of considering the filter cake in practice.

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