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为正确评估分舱对于海上风电筒型基础承载特性的影响,对有、无分舱板的相同钢筒进行室内模型对比试验,分别得出在水平荷载及弯矩共同作用下和竖直荷载作用下的荷载-位移曲线,及筒内外侧壁土压力及顶盖土压力的分布规律,同时进行有限元分析模拟。试验和计算结果表明:在竖向荷载作用下,分舱板使基础的极限承载力略有提高,分舱板分担了筒顶盖和筒壁的竖向承载,降低了顶盖的承载比例;在水平荷载和弯矩共同作用下,分舱板为筒型基础提供了较大的抗拔承载力,使筒型基础在水平和弯矩荷载作用下的极限承载力提高了20.2%,降低了极限状态下的水平位移和倾角。总之,分舱板不但可以提高海上风电基础施工浮运过程的稳定性,还可以提高基础运行时的极限承载力。
In order to correctly evaluate the effect of subdivision on the bearing characteristics of offshore wind turbine foundation, indoor model comparison experiments were conducted on the same steel cylinder with and without sub-deck, and the results were obtained under the combined effect of horizontal load and bending moment and vertical load Under the load - displacement curve, and the inner and outer cylinder wall pressure on the roof and earth pressure distribution law, at the same time finite element analysis of simulation. The results of the tests and calculations show that under the action of vertical load, the subdivision plate makes the ultimate bearing capacity of the foundation slightly increase, and the subdivision plate shares the vertical bearing of the cylinder head cover and the cylinder wall, reducing the bearing capacity of the cover. Under the combined action of horizontal load and bending moment, the subdivision plate provides a large anti-pull bearing capacity for the tubular foundation, which increases the ultimate bearing capacity of the tubular foundation under horizontal and bending moment loads by 20.2% Horizontal displacement and inclination under extreme conditions. In short, the sub-board not only can improve the stability of the floatation process of offshore wind power foundation construction, but also can improve the ultimate bearing capacity of the foundation during operation.