A P-y Curve Method For Horizontal Bearing Characteristies Of Single Batter Pile

With a good level of horizontal bearing capacity, battered piles and pile groups contains batter piles are widely used in bridges, piers, large-scale transmission lines, buildings on the slope and other projects. Meanwhile. The research about bearing capacity of battered piles are mainly in the laboratory test, the theoretical analysis are rarely reported.According to the mechanical characteristics of soil which is in the side of battered piles, the three-dimensional wedge model is proposed when the shallow soil of pile side is in the limit state in the pile side of the passive region in this paper. Based on the theory of limit equilibrium and considering many factors on the ultimate soil resistance of pile side, the ultimate soil resistance of battered pile at different angle in shallow strata is deduced, subsequently, numerical analysis shows the difference between the ultimate soil resistance of battered piles and the ultimate soil resistance of plumb pile. Based on the three-dimensional wedge model, the method for determining initial subgrade modulus of battered piles is proposed and the p-y curve for plumb pile in sands proposed by Reese is modified in this paper, then p-y curve method for analyzing the bearing characteristic of horizontal loaded single battered pile in sands is obtained. On the basis of above-mentioned work, using the virtual work principle, the finite element formulations of beam element and nonlinear foundation soil-spring elements are deduced, then the finite element iterative method is given. The corresponding analytical procedures is programmed, then the effectiveness and rationality of the nonlinear soil spring elements is verified through a simple example. At last, numerical analysis of centrifuge model test shows that the results match with the model experiment results.