Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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3-Dimensional Consolidation Analysis Considering Viscosity on Soft Clay Ground improved by Plastic Board Drain

점성을 고려한 PBD 타설 연약점토지반의 3차원 압밀해석

  • You, Seung-Kyong (Dept. of Civil Engineering, Myongji College) ;
  • Han, Jung-Gun (Dept. of Civil & Env. Engineering, Chung-Ang University) ;
  • Jo, Sung-Min (Dept. of Geotechnical Eng., Pyeong-Won Engineering) ;
  • Kim, Ji-Yong (Dept. of Geotechnical Eng., Pyeong-Won Engineering)
  • Published : 2005.12.30
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Abstract

A series of numerical analyses on soft clay ground improved by plastic board drain(PBD) were carried out, in order to investigate the consolidation behavior considering viscosity of the improved ground. The applicability of numerical analyses, in which an elasto-viscoplastic three-dimensional consolidation finite element method is applied in this study, was confirmed through comparison between experimental and analytical results. As the analytical results, consolidation behavior of both settlement and excess pore pressure and effective stress in clay were elucidated. Then secondary consolidation characteristics of improved ground were estimated through compare with results of typical one-dimensional consolidation analysis.

점성을 고려한 연약점토지반의 압밀거동을 파악하기 위해 플라스틱보드드레인(PBD)에 의해 개량된 연약점토지반의 압밀거동에 대한 탄점소성 3차원 수치해석을 실시하였다. 본 연구에서 사용한 수치해석기법의 적용성은 기존에 실시한 모형실험의 결과와 수치해석의 결과를 비교함으로써 검증하였다. 수치해석 결과로부터 연약점토지반의 침하 및 과잉간극수압의 소산거동, 유효응력증분의 변화 특성을 파악할 수 있었으며, 기존의 일차원 압밀해석 결과와의 비교를 통해 개량지반에서 발생하는 이차압밀특성을 평가하였다.

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