Large-diameter pipe piles (LDPPs) are increasingly used to support marine structures but are prone to pile-running during seabed installation, risking severe accidents like wire breakage or barge capsizing. Despite known soil spatial variability, pile-running mechanics remain understudied. This research conducted 3D large deformation random finite element analyses to investigate LDPP pile-running in spatially variable seabeds, modeling undrained shear strength as a non-stationary random field. Using a Coupled Eulerian-Lagrangian approach with Monte Carlo simulations, the study reveals that soil variability significantly affects the deceleration phase, with final embedment depth reflecting cumulative soil strength.

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Pile-Running of Large-Diameter Pipe Piles in Spatially Variable Clay

  • Zhenghong Su,
  • Yong Fu,
  • Minhao Zhang,
  • Kailin Ding,
  • Shuntao Fan

摘要

Large-diameter pipe piles (LDPPs) are increasingly used to support marine structures but are prone to pile-running during seabed installation, risking severe accidents like wire breakage or barge capsizing. Despite known soil spatial variability, pile-running mechanics remain understudied. This research conducted 3D large deformation random finite element analyses to investigate LDPP pile-running in spatially variable seabeds, modeling undrained shear strength as a non-stationary random field. Using a Coupled Eulerian-Lagrangian approach with Monte Carlo simulations, the study reveals that soil variability significantly affects the deceleration phase, with final embedment depth reflecting cumulative soil strength.