Method for calculating ground screw internal force of embedded twelve-ground screw tower foot structure

The invention provides a calculation method of ground screw internal force of an embedded twelve-ground screw tower foot structure. The calculation method comprises the following steps: dividing a plastic area of an embedded ground screw and a plastic area of an external ground screw in an assembly area of a tower foot bottom plate according to a plastic yield line theory; according to a virtual work principle, work applied to the tower foot bottom plate by the internal force of the ground snails is equal to virtual work generated by the internal force of the tower foot bottom plate in the plastic area of the ground snails, and expressions of the internal force of the embedded ground snails and the internal force of the external ground snails are obtained by calculating the virtual work generated by the internal force of the tower foot bottom plate in the plastic area of the ground snails; considering the influence of the rigidity difference and the position of the ground snails, performing rigidity differenc