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<p>In recent years, as the development of marine resources continues to develop in deep sea areas, offshore wind turbine pile foundations have been driven to create in the direction of larger diameters and bearing capacities. As a result, during pile driving, the soil around the piles is disturbed and weakened, thus affecting the vertical bearing capacity of the piles. To investigate the weakening phenomenon of pile-soil interaction in soft clay under continuous vertical loading, a series of indoor model tests were conducted using a self-made loading device. The distribution of pile-side friction and variation of pile-top reaction force with pile displacement were obtained. The experiments verified that the exponential formula is more suitable for describing the vertical soil weakening effect. Subsequently, the exponential formula was used to correct the pile-soil vertical hyperbolic model, and a vertical pile foundation weakening model was established. The vertical pile foundation weakening model was implemented using the FRIC subroutine in ABAQUS, providing a reference for the design analysis of weakened bearing capacity caused by the piling of offshore wind turbine foundations.</p>

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Study on the weakening of vertical bearing capacity of offshore monopile wind turbine foundation caused by continuous piling

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Yuchen Gu,
  • Milad Shadman,
  • Segen F. Estefen,
  • Yi Wang

摘要

In recent years, as the development of marine resources continues to develop in deep sea areas, offshore wind turbine pile foundations have been driven to create in the direction of larger diameters and bearing capacities. As a result, during pile driving, the soil around the piles is disturbed and weakened, thus affecting the vertical bearing capacity of the piles. To investigate the weakening phenomenon of pile-soil interaction in soft clay under continuous vertical loading, a series of indoor model tests were conducted using a self-made loading device. The distribution of pile-side friction and variation of pile-top reaction force with pile displacement were obtained. The experiments verified that the exponential formula is more suitable for describing the vertical soil weakening effect. Subsequently, the exponential formula was used to correct the pile-soil vertical hyperbolic model, and a vertical pile foundation weakening model was established. The vertical pile foundation weakening model was implemented using the FRIC subroutine in ABAQUS, providing a reference for the design analysis of weakened bearing capacity caused by the piling of offshore wind turbine foundations.