Abstract: This paper is presented to investigate the theoretical calculation method for the inner-force and deformation analysis of batter piles. Firstly, the bearing mechanism and deformation characteristics of batter piles are reviewed on the basis of the existing studies. The simplified mechanical model of batter piles is proposed by assuming that external loads atop batter piles would be decomposed along axial and radial directions of piles, and then the determination method of the foundation resistance is proposed and the governing differential equation of batter piles is further derived. Secondly the conventional finite beam element method is modified to consider the effects of the second-order effect and pile-soil interaction, and a program is compiled for the analysis of the inner-force and deformation of batter piles based on the MATLAB platform. Finally, the proposed theoretical method is validated by a model test and a field test, and some conclusions are summarized. These above-mentioned analyses can provide references for engineering design of batter pile, which is of theoretical and engineering application value.

Key words: bridge engineering, inner-force and deformation analysis, finite beam element method, batter pile, element stiffness matrix