The analysis have been done for the load-transfer mechanism of T-shaped rigid pile by assuming pile-soil load-transfer function which is hyperbolic model; the differential equations of pile and soil under the pile and pile cap have been established to express the relations

between vertical displacement

lateral resistance of vertical stress

pile-side friction force and depth control. The corresponding analytical formulas have also been derived by using approximate solution method of differential equation. Using directly the settlement of pile top as the known condition

the calculation results can image basically the work mechanism character rules of single pile with cap according to the method of the paper. As the depth increased

the pile axial force becomes diminution

Lateral resistance of piles with depth increasing showing the first increase after decreasing . The pile-stress ratio is bound up with load. The calculation results by using of the method are close to the test results

and can provide the theoretical basis for engineering design.