Graph-analytical calculating pile’s settlement verification

Abstract

The paper presents the solution of the problem of interaction of a single reinforced concrete compressible pile with an elastoplastic single-layer soil mass. The settlement is calculated on the basis of the analytical equation in the elastic formulation. A graph-analytical method is proposed to account for the nonlinear behavior of soils, which limits the bearing capacity of the pile on the lateral surface to the strength of the adjacent soil and under the pile toe to the ultimate load determined by the Brinch Hansen formula. The novelty of this method consists in taking into account the mechanism of load redistribution on the pile, the nonlinear behavior of the soil on the lateral surface and under the pile toe, and also the possibility of detachment and slippage of the pile after reaching the ultimate strength. A comparative analysis of the graph-analytical solution with the numerical solution in the geotechnical software Plaxis 2D and with static pile tests was performed. According to the results of the performed calculations, graphs of the dependence of settlement on loads were plotted, and conclusions about the possibility of using the graph-analytical method were drawn and the prospects for further development of the graph-analytical method are proposed.

Keywords

• pile
• pile-soil interaction
• pile detachment
• pile slippage
• numerical solution
• graph-analytical solution
• shear stresses
• pile settlement