Comparação de capacidade de carga de estaca hélice contínua através de métodos semiempíricos e ensaio de carregamento dinâmico

Abstract

Foundation engineering is a subject of interest due to its importance during the design and conception of constructions. In this context, all constructions associated with buildings and bridges need foundations that must be able to resist the imposing loads. In addition, such foundations must be design in accordance to the last version of codes. In order to verify the capacity of the soil to resist the applied forces, it is necessary to determine the bearing capacity of the foundation. This work aims to compare the estimated bearing capacity of a pile through semi empirical methods and by means of dynamic tests conducted at site. The field data were collected at the construction site located in Uberlandia (MG) in a Continuous Flight Auger Pile (CFA pile). In the semiempirical methods, the ultimate resistance in skin friction and in point bearing are obtained based on the values of SPT, such that the resistance depends on the soil type and the pile type. This work used the three semi empirical methods: (i) by Aoki-Velloso, (ii) by Décourt-Quaresma and (iii) by Teixeira, to determine the bearing capacity and, such values, were afterwards compared to the results obtained with dynamics tests. Finally, the design of a pile was verified in order to validate the project and to evaluate the bearing capacity estimated through the semiempirical methods.