Métodos para previsão da capacidade de carga e do recalque em fundação estaqueada

Abstract

The technique of piled raft foundation has been employed in various engineering projects. Constructions that utilize this technique, combining shallow and deep foundations in cooperation instead of the conventional group pile design, ensure greater efficiency and safety while minimizing geotechnical issues in soils due to foundation design flaws. Adequate foundation design is related to predicting the bearing capacity and settlement under the anticipated structural demands. In this context, this article examines the performance of some methods used to determine the bearing capacity and settlement of a piled raft foundation composed of nine piles. This study is based on the results of a static and slow axial compression load test conducted on a single pile. The results of the conducted analyses demonstrate that the method that takes into account the contribution of the raft-soil contact, sharing the stresses with the piles, ultimately provides the raft with greater bearing capacity and uniform settlement. Consequently, the overall bearing capacity of the system is increased. Therefore, when designing pile group foundations, it is essential to consider the individual characteristics of the piles, as well as the interaction between the raft and the soil. This specific method offers substantial benefits by ensuring a stable, safe, and 24% more efficient compared to traditional methods, while also reducing the economic and environmental impacts on society.