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提出一种多向荷载同时作用下的刚性桩筏基础简化计算方法,基于Mindlin解,分析桩顶面-桩顶面、桩顶面-土表面、土表面-土表面的相互作用关系。推导多向荷载下桩土体系柔度矩阵,得到刚性桩筏基础的受力和变形的关系,通过与有限元对比证明了文中方法的正确性,在此基础上对耦合荷载作用下的风机基础的受力和变形特性进行分析。研究表明,耦合荷载作用下风机基础将会产生竖向不均匀沉降,并会引起桩顶轴力的的巨大的差异。
A simplified calculation method of rigid piled raft foundation under multi-directional loads is proposed. Based on Mindlin solution, the interaction between pile top surface, pile top surface, pile top surface soil surface, soil surface and soil surface is analyzed. By deducing the flexibility matrix of pile-soil system under multi-directional loading, the relationship between the stress and deformation of rigid piled raft foundation is obtained. The correctness of the method is verified by comparison with the finite element method. Based on this, The force and deformation characteristics of the analysis. The research shows that under the action of coupling load, the foundation of the wind turbine will produce vertical and non-uniform settlement, and will cause huge difference of the axial force of pile top.