Research on load transfer mechanism of composite foundation of rigid pile with cap based on hyperbolic model

The nonlinear analysis have been done for the load transfer mechanism of composite foundation of rigid pile with cap by assuming load-transfer function which is hyperbolic model. Based on the idea of literature[1], the controlled differential equations have been put forward for pile, soil under pile cap and soil between pile cap, including its vertical displacement, vertical stress, friction force and depth. The corresponding analytical formulas have also been derived by using the approximate solution of differential equation. Using directly the settlement of pile top as the known condition, the calculation results can image basically the work behavior rules of composite foundation of rigid pile with cap and provide the theory base for engineering design.