pile foundation systems. In the design of pile foundation, the design parameters (pile type, pile diameter, pile length, pile layout etc.) that satisfy technical and economic criteria should be determined. Different design methods such as finite element, finite difference methods etc. are used to determine the design parameters. Although finite element method (FEM) analysis gives accurate results, it requires large amount of experimental data, time and effort in order to build and solve the pile foundation problems on it. Moreover, different pile foundation alternatives that satisfy technical and economic constraints can be obtained by combining different sets of .