Analysis of Vertical Bearing Capacity of Offshore Wind Turbine Wedged-Monopiles
In order to improve the foundation utilization and increase the feasibility of offshore wind power facilities,the vertical bearing capacity characteristics of wedged monopiles are studied and analyzed.The wedged monopile model is established by using the PLAXIS 3D finite element software.The vertical bearing characteristics of the wedged monopile and the equal-section monopiles are compared and analyzed from the aspects of pile side friction resistance,pile side normal stress and soil displacement,and the influence of internal friction angle,wedge angle and wedge height on the bearing capacity is discussed.The research shows that the vertical bearing capacity of wedge single pile foundation is higher than that of single pile foundation with equal section,and the bearing capacity increases with the increase of wedge angle and wedge height,with the maximum increase rate of 24.786％.The introduction of inclined side wall changes the transfer law of pile side friction;The inclined side wall compacts the soil around the pile,and the pile side friction and normal stress increase,thus effectively improving the vertical bearing capacity of the monopiles.The research results provide reference for the selection and design of offshore wind power foundation in the future.
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