Combined Analysis of Footing and Piles

A method of analysis is presented based on the three dimensional modeling of a pile/pile cap foundation with the computer program Plaxis that allows the reproduction of construction and loading phases for the structure. A construction phase is recommended that allows for the mobilization of a bearing pressure under the pile cap. This phase is defined as one during which construction dead loads are applied. During this phase, the pile cap is disconnected from the piles. In the subsequent phases, the piles are connected to the pile cap and the remaining design loads are applied. The analysis determines the loads on the piles and on the soils at the bearing level of the pile cap. Loads transferred to the soils at this level reduce the number of piles required to support the foundation resulting in significant savings in time and cost of construction.