Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Finite Element Modeling of Geogrid-Encased Stone Column in Soft Ground

연약지반에 시공된 지오그리드 보강 쇄석기둥 공법의 유한요소모델링

  • Yoo, Chung-Sik (Dept. of Civil & Environ. Engrg., Sungkyunkwan Univ.) ;
  • Song, Ah-Ran (Dept. of Civil & Environ. Engrg., Sungkyunkwan Univ.) ;
  • Kim, Sun-Bin (Dept. of Civil & Environ. Engrg., Sungkyunkwan Univ.) ;
  • Lee, Dae-Young (Department of Geotechnical Engrg., Korea Institute of Construction Technology)
  • 유충식 (성균관대학교 토목환경공학과) ;
  • 송아란 (성균관대학교 토목환경공학과) ;
  • 김선빈 (성균관대학교 토목환경공학과) ;
  • 이대영 (한국건설기술연구원)
  • Published : 2007.10.31
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Abstract

This paper presents the results of a research performed to investigate the finite element modeling approach for GESC (Geogrid-Encased Stone Column) method in soft ground within the framework of stress-pore pressure coupled analysis. GESC reinforcement mechanism and construction method was first examined and model verification of stone column on the results of FE analysis was identified. The results indicate that the 3D FE analysis and membrane elements play the most important role in the soft groung using GESC. Based on the results, a modeling method was suggested for stress-pore pressure coupled finite element modelling of GESC in soft ground.

본 논문에서는 연약지반의 기초구조물로서 지오그리드 보강 쇄석기둥 공법(Geogrid-Encased Stone Column, GESC)이 시공되는 조건을 대상으로 3차원 유한요소해석 모델링측면에서 중요하게 다뤄져야 하는 내용을 고찰하였다. 이를 위해 GESC 보강개념 및 시공방법을 고찰하였으며, 유한요소모델링을 수행하여 점토지반의 압밀과 쇄석기둥 공법에 대한 모델 검증 및 응력-간극수압 연계해석을 수행하였다. 연약지반 성토제방에 적용된 GESC공법의 유한요소해석 결과를 통해 제방의 효율적인 거동평가를 위해서는 3차원 유한요소 해석 및 지오리드의 인장특성을 모사할 수 있는 멤브레인 요소의 고려 여부가 큰 영향을 미치는 것으로 나타났으며, GESC공법이 적용된 제방의 연계해석 모델링시 중요하게 고려되어야할 사항을 제시하였다.

Keywords

References

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