ABSTRACT
Pile setup refers to the gain of pile resistance over time. Its accurate prediction can increase efficiency of foundation design. The contribution of pile setup for displacement piles is mainly from shaft resistance rather than from end bearing resistance. This paper performs a numerical investigation of pile setup caused by increased in shaft resistance along clayey soils using the modified Cam-clay soil model. The press-replace method is used to simulate the initial undrained pile installation for a circular closed-ended flat-tip pile. Results from stress path analyses show how the mobilised undrained shear strengths of soil adjacent to pile shaft increases over time. Radial effective stresses also change during consolidation and load tests. The numerical results are then compared to the available field data by either considering the ratio of increase in undrained shear strength, or radial effective stress, or different combinations of both.
