The traditional calculation method of pile capping beam is inverted consecutive beam method which cannot reflect the influence of pile stiffness variance and the partaking of soil

and can’t simulate sequence of soil under beam and diffusion of stress-strain. Firstly

load transferring method is used to calculate stiffness of pile; and an auto-adjustment method that can adjust counter pressure of beam bottom is put forward; then combining the Newmark calculation principle

an inner-force analysis method is deduced which considering pile bearing capacity variance and pile shaft section variance and soil plastic deformation. Finally

the comparative calculation was done with the data from an engineering instance

the calculation result shows that the new method introduced is coincide well with actual status.