Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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A Study on the Estimation of Ultimate Bearing Capacity of Granular Group Piles Reinforced with Steelpipe Skirts

강관스커트 보강 조립토 군말뚝의 극한지지력 평가에 관한 연구

  • 김홍택 (홍익대학교 공과대학 토목공학과) ;
  • 황정순 (홍익대학교 대학원 토목공학과) ;
  • 강인규 ((주)브니엘컨설턴트) ;
  • 고용일 (한라건설(주) 기술연구소)
  • Published : 1999.02.01
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Abstract

In the present study, a simple finite element method of analysis to predict non-uniform settlements at the interface between the mat foundation and foundation soils is proposed. Based on the proposed finite element method of analysis, the method to evaluate load sharing ratios of the foundation soils adjacent to the granular group piles is also presented. Further proposed is a procedure to estimate ultimate bearing capacity of the skirted granular group piles in a square pattern. To verify validity of the proposed methods and the estimated ultimate bearing capacity of the skirted group piles, comparisons are made with the results analyzed by using the PENTAGON3D FEM program. Finally, behavior characteristics with different reinforcement patterns of the skirts and the effect of an increase of ultimate bearing capacity due to the skirts are analyzed in connection with the design parameters.

본 연구에서는, 강관스커트 보강 조립토 군말뚝에 초점을 두고, 상부 매트기초와 하부기초지반 사이의 접촉면 각 지점별 불균등 침하량 예측을 위한 간편 유한요소해석기법과 이에 근거한 각 말뚝 인접지반의 하중분담비 평가방법 및 극한지지력 평가절차 등을 제시하였다. 또한 제시하고자 하는 기법의 적합성과, 이를 토대로 한 극한지지력 예측결과의 타당성을 확인하기 위해, $PENTAGON_{3D$ 유한요소 프로그램을 이용한 해석결과와의 비교.분석이 수행되었다. 이외에도, 강관스커트 보강유형에 따른 거동특성 분석과 스커트 보강에 의한 극한지지력 증대효과를 관련 설계변수와 연계한 분석 등을 수행하였다.

Keywords

References

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