Oblique load is one of the most important loading forms of pile foundation in applications such as offshore

transmission line tower engineering

etc. However

the current calculation method for this problem is relative immature. Piles were divided as free section and embedded section. The deformation for modeling representative element of pile was developed. The pile-soil interaction under lateral load was considered through group pile p-y curves method. The pile-soil interaction under vertical load was considered by using shear displacement method with the consideration of soil-pile relative slip and second order bending moment caused by vertical force ( ) effect. The load-displacement relationship and bending moment distribution can be obtained by iterative method. The accuracy and reliability of the theoretical calculation established in this paper were verified through comparing with previous results. The results expand the theoretical calculation method of pile foundation under oblique load

and provide a reference for related engineering design and calculation.