超大直径钢管桩风机基础优化研究

Optimization of ultra-large-diameter pipe piled wind generator foundation

针对近海风机基础中的超大直径独立桩基础的力学问题,结合实际工程,采用数值软件对其进行模拟计算,得到桩长、桩壁厚与位移和应力变化曲线,以及局部改变桩壁厚和增加翼缘对桩位移和应力的影响。通过计算分析认为:桩长和桩壁厚都在一定范围内对桩位移和应力有影响,桩壁厚局部变化对位移影响不明显,但对应力有显著变化;在泥面下一定范围内增加翼缘能有效减小侧向位移,并给出翼缘的最优入土长度和厚度,为实际工程提供设计依据。

According to the mechanics problem of ultra-large-diameter single-pile in offshore wind generator foundation, this paper simulates the mechanical characteristics of the single-pile by number software based on the practical engineering. Variation curves of pile length, pile wall thickness and displacement, stress, and data tables which displacement and stress are changed with the variation of pile wall thickness and increasing the flange are gained by computing results. The conclusions are obtained that the variation of pile length, pile wall thickness in certain range can affect pile displacement and stress, the local variation of pile wall thickness changes indistinctively displacement, but stress is changed observably, and the lateral displacement can be reduced effectively by increasing the flange in certain range under mud surface. The best underground length and thickness of the flange are given in order to provide the design basis for the practical engineering.