关键词: 筒型基础, 分舱板, 海上风电机, 模型试验, 有限元模拟

Abstract: In order to evaluate the influence of bulkheads on the bearing capacity of bucket foundation, a series of comparative model experiments is conducted on two identical steel buckets, one with bulkheads and the other without. The load-displacement curves under the combined action of horizontal load and bending moment or under vertical load, the distribution of the soil pressure on the inner, outer and upper walls of the bucket are obtained by the experiment individually. Finite element simulation is performed at the same time. The experimental and numerical results show that under vertical load, the bearing capacity of bucket foundation with bulkheads is a slightly higher than that of the foundation without bulkheads. The bulkheads share the vertical loads from the cover and sidewall, cutting the load applied on the cover. Under combined action of horizontal load and bending moment, the bulkheads provide large pulling resistance for the foundation, improving the ultimate bearing capacity by 20.2%, and reducing the ultimate horizontal displacement and angle. In a word, bulkheads can not only improve the stability during towing, but also increase the ultimate bearing capacity of offshore wind turbine foundation during the operation.

Key words: bucket foundation, bulkheads, offshore wind turbine, model experiment, finite element simulation