Linear analysis of interaction for corner piles and soil under flexible grouped piles cap

Based on linear load deliver function to pileside soil and pileend soil, and considering the influence of sharing load of the pileside soil and pile type on load deliver law of piles, using mechanics theory and approximate solution methoddistrict method of differential equation,the approximate analytical formulas of interaction for the corner pile with variable cross section and soil are derived under flexible grouped piles cap. The friction force and the axial force of pile with constant cross section are contrast with the friction force and the axial force of pile with variable cross section by a example, the contrast indicates that the friction force of pileside may be raised by changing pile type. In order to verify the reliability of the proposed method, the results of the model test are compared with the results in this paper. It's showing that the proposed method has good precision.