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91 - PROVA DE CARGA ESTÁTICA EM ESTACAS: ANÁLISE COMPARATIVA DA CAPACIDADE DE CARGA ÚLTIMA POR MÉTODOS TEÓRICOS/SEMIEMPÍRICOS E MÉTODOS DE EXTRAPOLAÇÃO

Doi: 10.47094/COBRAMSEG2026.5/91

PALAVRAS CHAVE: Prova de carga estática, Estacas escavadas tipo hélice contínua, Curva carga–recalque, Métodos de extrapolação.

KEYWORDS: Static load test, Continuous flight auger (CFA) piles, Load–settlement curve, Extrapolation methods.

ABSTRACT:
The determination of the ultimate bearing capacity of piles is a fundamental step in the design of deep foundations, and different approaches are commonly used for its estimation. The present study aims to perform a comparative analysis of the ultimate bearing capacity of four continuous flight auger (CFA) piles, confronting the results obtained from theoretical and well-established semi-empirical methods in geotechnical practice with those derived from static load tests, in which the failure load was determined through load–settlement curve extrapolation methods. The theoretical evaluation was carried out using the method proposed by Karl Terzaghi (1943). The semi-empirical assessment was performed using the methods developed by Aoki and Velloso (1975), as well as by Décourt-Quaresma (1978). For the extrapolation of the ultimate load from the load–settlement curves, the methods proposed by Van der Veen (1953), Chin–Kondner (1970), Décourt (1996), and the criterion established by the Associação Brasileira de Normas Técnicas NBR 6122:2022 were adopted. The results indicated significant variations among the evaluated methodologies, showing that the extrapolation methods provided a better approximation to the experimental values, while some semi-empirical methods demonstrated greater sensitivity to the characteristics of the soil profile.

Autores

  • Erland González Leaño

  • Jaime Rodrigo Tamayo Aguilar

  • Rodman Raúl Córdova Rodriguez

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