Pile Foundations - PIES

Authors:
Harry Poulos


This program computes the axial movement and load distribution within a single pile, or a pile within a group, subjected to axial load and/or externally-imposed soil movements (heave or consolidation), such as are developed in an expansive soil by changes in moisture conditions.

The program uses a simplified boundary element formulation, and the soil can be represented either by a continuum or a series of springs. In each case, non-linear response of the interface can be incorporated by:

* asssuming an elastic-plastic or hyperbolic relationship between soil stiffness and stress level; and
* allowing for the effects of pile-soil slip and end-bearing failure by specifying limiting values of shaft resistance and end-bearing resistance.