关键词: 数值模拟, 钢管桩, 承载力特性

Abstract: The application of prefabricated steel pipe piles in offshore wind power construction is highly prevalent. The numerical simulation method is employed to investigate the bearing capacity of steel pipe piles and predict the penetration depth during pile driving. A steel pipe pile in an offshore wind power project was selected as an example to establish the numerical model throughout the proper selection of analytical parameters, and determination of the hammering load. The dynamic measurement data of the axial capacity of the steel pipe pile during the construction process was compared with the numerical simulation results to study the axial capacity performance of the pile during the pile driving process. The research indicates that: (1) During the hammer penetration process, the tip resistance and lateral resistance of the pile gradually increase, the penetration rate gradually decreases, the displacement of the pile oscillates, and the tip resistance increases slowly in a "fluctuating" manner. (2) The axial capacity and penetration depth predicted by the numerical simulation method are highly consistent with the measured results, and the simulation accuracy is high.

Key words: Numerical Simulation, Steel Pipe Piles, Axial Capacity Characteristics