Traditional monopile foundations cannot support the greater lateral loads and horizontal displacement needs required by offshore wind turbines due to their increasingly large size. Popularity has increased for a recently created hybrid pile foundation that combines a traditional monopile with a wide-shallow bucket. In this paper, 1-g model tests in soft clay are used to analyze the lateral behavior of hybrid pile foundation under static load. As a standard, the monopile with the same pile diameter and embedded length is employed. According to the experiment’s findings, the pile-bucket hybrid foundation’s lateral ultimate bearing capacity is more than 70% higher and its initial stiffness is nearly twice as good as that of a monopile foundation under the same lateral load. In addition, this paper compares the pile displacement, pile bending moment, and p-y curve of monopile foundation and hybrid pile-bucket foundation.

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Static Loading Behavior of a Hybrid Pile-Bucket Foundation for Offshore Wind Turbines

  • Guoliang Dai,
  • Chaoqun Zuo,
  • Weiming Gong,
  • Jinghui Tao

摘要

Traditional monopile foundations cannot support the greater lateral loads and horizontal displacement needs required by offshore wind turbines due to their increasingly large size. Popularity has increased for a recently created hybrid pile foundation that combines a traditional monopile with a wide-shallow bucket. In this paper, 1-g model tests in soft clay are used to analyze the lateral behavior of hybrid pile foundation under static load. As a standard, the monopile with the same pile diameter and embedded length is employed. According to the experiment’s findings, the pile-bucket hybrid foundation’s lateral ultimate bearing capacity is more than 70% higher and its initial stiffness is nearly twice as good as that of a monopile foundation under the same lateral load. In addition, this paper compares the pile displacement, pile bending moment, and p-y curve of monopile foundation and hybrid pile-bucket foundation.