关键词: 抗拔桩, 离心模拟, Q-S曲线, 加载方式, 加载速率, 抗拔极限承载力

Abstract: To assist the design of pile foundation of an offshore wind farm, centrifuge modeling is performed to determine the uplift bearing capacity of single ultralong steel pipe-pile of large diameter by which the wind turbine foundation is constituted. Curve of load versus displacement (Q-S curve) deducted from the results of centrifuge model test are compared with that from prototype uplift capacity test. The effect of loading manner and loading rate on the ultimate uplift bearing capacity is discussed. It is shown by comparison that the value of ultimate uplift bearing capacity of single pile from centrifuge test is greater than that obtained from prototype test. As higher rate usually mobilizes higher strength, a higher loading rate in the centrifuge model test is regarded as the cause of the difference between two test results.