Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Shear Load Transfer Characteristics of Friction Piles in Deep Soft Clay

대심도 연약지반상 마찰말뚝의 주면하중전이 거동 분석

  • Moon, Joon-Shik (Samsung C&T Engineering & Construction Group) ;
  • Paek, Jin-Yeol (Department of Civil and Environmental Engineering, Yousei University) ;
  • Jeong, Sang-Seom (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Ko, Jun-Young (Department of Civil and Environmental Engineering, Yonsei University)
  • 문준식 (삼성물산 건설부문 토목기술실) ;
  • 백진열 (연세대학교 대학원) ;
  • 정상섬 (연세대학교 사회환경시스템공학부) ;
  • 고준영 (연세대학교 대학원)
  • Received : 2011.05.21
  • Accepted : 2011.10.22
  • Published : 2011.10.31
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Abstract

The shear load distribution and deformation of offshore friction piles are investigated using experimental tests and a numerical analysis. Special attention is given to the soil-pile interaction of axially loaded pile. A framework for determining the f-w curve is proposed based on both theoretical analysis and experimental load test data base. A numerical analysis that takes into account the proposed f-w curves was performed for major parameters on pile-soil interaction such as the pile diameter, the pile length, and the soil condition. Based on the analysis, it is shown that the proposed f-w method is capable of predicting the behavior of a friction pile in deep soft clay. Through comparisons with case histories and finite element results, it is found that the proposed f-w curves are more appropriate and realistic m representing the pile-soil interaction of axially loaded piles in deep soft clay than that of existing f-w method.

일반적으로 연직하중을 받는 말뚝의 주면하중전이 거동 및 변형해석을 위해 f-w 하중전이 해석법이 널리 사용되고 있다. 본 연구에서는 국내 지반조건에 적합한 대심도 마찰말뚝의 주면하중전이 해석을 고찰하였으며, 여러 현장재하시험 자료와 3차원 유한요소해석 및 이론적인 방법 통해 말뚝의 실제 거동에 보다 부합되도록 대심도 마찰말뚝의 f-w곡선을 제안하였다. 제안된 하중전이함수법의 타당성을 검증하기 위하여 현장재하시험 사례와의 비교분석을 수행하였고, 그 결과, 제안된 해석방법은 기존 f-w곡선에 비해 대심도 마찰말뚝의 거동 및 변형 특성을 적절히 예측함을 알 수 있었다. 또한 대심도 마찰 말뚝지반의 상호작용을 정량적으로 평가하기 위하여 주면하중전이거동에 영향을 주는 인자들을 통한 매개변수 연구를 추가로 수행하였다.

Keywords

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