Abstract:
For the monopile of offshore wind turbine suffering horizontal loads such as wind, wave and current, its horizontal bearing capacity is one of the most important problems in foundation design. A new type of large diameter wing-monopile with a group of wings setting on the monopile near the mudline to rise the soil resistance is investigated in this study. By using ABAQUS finite element in combination with Mohr-Coulomb model, numerical simulation of 9 groups 1g model test for the wing-monopile with different shape parameters (length, width), buried depth, height and degree of load is carried out. The mechanical characteristics of the pile and soil are shown and analyzed. The validity of the numerical simulation is proved by comparing with the model tests. It reveals that the soil resistance around the pile is mobilized fully. The horizontal bearing capacity of the monopole is increased in different grade depending on the shape parameters, the buried depth of the wings and the height and degree of the horizontal load. The numerical simulation results show that the monopile having stable wings can geatly rise subsoil resistance and remarkably improve the horizontal bearing capacity of the monopile at the same time.