Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Analysis Method for Non-Linear Finite Strain Consolidation for Soft Dredged Soil Deposit - Part II: Analysis Method and Craney Island Case Study

초연약 준설 매립지반의 비선형 유한변형 압밀해석기법 - Part II: 해석기법과 Craney Island 사례분석

  • 최항석 (고려대학교 건축사회환경공학부) ;
  • 곽태훈 ((주)동명기술공단) ;
  • 이철호 (고려대학교 건축사회환경공학과) ;
  • 이동섭 (고려대학교 건축사회환경공학과) ;
  • 티모시 스탁 (일리노이대 토목환경공학과)
  • Received : 2011.01.15
  • Accepted : 2011.10.27
  • Published : 2011.11.30
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Abstract

This paper presents two analysis methods for characterizing the non-linear finite strain consolidation behavior of highly deformable dredged soil deposits along with the fundamental parameters obtained in the companion paper; that is, the zero effective stress void ratio, the non-linear relationships of void ratio-effective stress and void ratio-hydraulic conductivity. The simplified Morris's analytical solution (2002) and the widely recognized numerical program, PSDDF (primary Consolidation, Secondary Compression, and Desiccation of Dredged Fill) for both single and double drainage conditions are adopted in this paper to verify a series of laboratory experiments for self-weight consolidation of the Incheon clay and Kaolinite. The comparisons show that the analysis methods proposed herein can properly simulate the long-term non-linear finite strain consolidation behavior for dredged soils in the field. In addition, a case study for the artificial Craney Island has been conducted to illustrate the importance of obtaining appropriate non-linear finite strain consolidation parameters and the applicability of PSDDF in promoting dredged soil disposal.

본 논문에서는 압축성이 매우 큰 준설 매립지반의 비선형 유한변형 압밀거동을 평가하기 위해 두 가지 압밀해석방법이 제시되었다. 이를 위해 동반논문에서 얻어진 초기간극비, 비선형의 간극비-유효응력 관계와 간극비-투수계수 관계를 비선형 압밀 물성치로 적용하였다. 단순화된 Morris의 간편 이론해(2002)와 대표적인 일차원 비선형 유한변형 압밀 프로그램인 PSDDF(Primary Consolidation, Secondary Compression, and Desiccation of Dredged Fill)의 해석결과를 일련의 실내실험을 통해 얻어진 인천 준설토와 카올리나이트의 자중압밀 침하거동과 비교하여, 실제 준설 매립지반의 장기간 비선형 유한변형 압밀거동을 모사하는데 두 방법의 적용이 타당함을 보였다. 또한, Craney Island 인공섬 사례분석을 통하여 적절한 비선형 유한변형 압밀 파라메터 선정의 중요성과 준설 매립지반의 압밀거동 평가시 PSDDF의 적용성을 제시하였다.

Keywords

References

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