ESTUDO DA SEGURANÇA EM ESTACAS HÉLICE CONTÍNUA ATRAVÉS DA TEORIA DA CONFIABILIDADE NA REGIÃO DE OSASCO-SP
Abstract
In geotechnical engineering, the design of foundation elements uses semi-empirical methods, which provide security in their design through coefficients that increase and decrease values in order to obtain confidence in the project. These methods use results provided by subsoil investigation tests, involving a series of uncertainties during the characterisation of the soil mass, thus generating variability in resistance values, which can lead to the risk of structures collapsing. The concept of reliability and safety through probabilistic analyses has been used in foundation engineering, enabling a higher level of safety and risk control in project design. This article presents the structural reliability and safety criteria, as well as the probability of failure, for verifying the load capacity of continuous auger piles, using the semi-empirical methods of Aoki-Velloso (1975), Décourt-Quaresma (1978) and Antunes and Cabral (1996). Through statistical analyses and the construction of curves of the resistance probability density functions, it was found that the Antunes and Cabral (1996) method has the lowest variation in the estimated values for the pile load capacity in both models, with a higher reliability index and lower probability of failure.
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