Um modelo simplificado de radier estaqueado em solo estratificado aplicado a casos com interação solo x estrutura

Abstract

The research aims to present a simple method for the design estimation of piled raft foundations. The advantage of the method is that it has a general character, being able to contemplate a finite semi-space, stratified in the vertical and horizontal directions, with settlements that are nullified at the resistant rock layer. The developed procedure allows the estimation of settlements of a piled raft designed to function as a pile group enhanced by the raft, justifying the estimation of settlements predicted by the elasticity theory. After calibrating the proposal with methods known in the literature, with numerical analyses and instrumented cases, the procedure was adopted in two documented cases in different situations. The first case deals with a construction based on a shallow foundation that presented very poor behaviour. With the addition of some piles, a solution in a pile rafted foundation could reduce distortion settlements to a tolerable range. The second case deals with a deep foundation structure in which the monitoring of settlements indicated very small values, with much room for optimization of the number of piles. When applying the procedure to these cases, many conclusions already highlighted in the bibliographic research were observed, for other cases. The author expects that this simple procedure will be useful to improve the use of piled raft foundations as an alternative in current foundation.