Evaluation of Vertical Bearing Capacity of Bucket Foundations in Layered Soil by Using Finite Element Analysis

유한요소해석을 통한 다층지반에서의 버킷기초 수직지지력 산정

Park, Jeong-Seon;Park, Duhee;Yoon, Se-Woong;Saeed-ullah, Jan Mandokhai
박정선;박두희;윤세웅;만도카일 사이둘라

  • Received : 2016.05.12
  • Accepted : 2016.06.28
  • Published : 2016.07.31


Estimation of vertical bearing capacity is critical in the design of bucket foundation used to support offshore structure. Empirical formula and closed form solutions for bucket foundations in uniform sand or clay profiles have been extensively studied. However, the vertical bearing capacity of bucket foundations in alternating layers of sand overlying clay is not well defined. We performed a series of two-dimensional axisymmetric finite element analyses on bucket foundations in sand overlying clay soil, using elasto-plastic soil model. The load transfer mechanism is investigated for various conditions. Performing the parametric study for the friction angles, undrained shear strengths, thickness of sand layer, and aspect ratios of foundation, we present the predictive charts for determining the vertical bearing capacities of bucket foundations in sand overlying clay layer. In addition, after comparing with the finite element analysis results, it is found that linear interpolation between the design charts give acceptable values in these ranges of parameters.


Bucket foundation;Vertical bearing capacity;Layered soil;Finite element analysis


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Grant : 해상풍력 지지구조 설계기준 및 콘크리트 지지구조물 기술 개발

Supported by : 한국해양과학기술진흥원