There are lots of nonlinear analysis methods on studying piles. Among these methods
the load transfer function method is an important one. And the complexity of problem results in many function forms that can be used in some range. The generalized load transfer function is a universal function form that can reflect all functions reported in the literature. The generalized load transfer function can be transformed to other forms by adding a parameter. At the same time
it can reflect the softening effect. Based on realizing the mechanics parameters of soil in site
the adoption of this function can decrease number of trial piles. Therefore