AVALIAÇÃO DA CAPACIDADE DE CARGA GEOTÉCNICA E RECALQUE DE ESTACAS HÉLICE CONTÍNUA MONITORADA EM UM EDIFÍCIO DE RIO BRANCO – AC

Abstract

This dissertation evaluates the geotechnical load capacity and settlement of Continuous Flight Auger (CFA) piles used in the construction of the Federal Police Superintendency (DPF/AC) in Rio Branco, Acre. The building comprises three blocks separated by expansion joints, featuring a basement, four floors, an engine room, and a heliport. The foundations include isolated footings and CFA piles, with the latter being the focus of this study. Using soil stratigraphy and NSPT data from SPT boreholes, a computational program was employed to assess the geotechnical load capacity of the piles using various methodologies, including Aoki & Velloso (1975), Monteiro (1997), Kárez & Rocha (2000), Antunes & Cabral (1996), Gotlieb et al. (2000), and Décourt & Quaresma (1978/1996). Settlements were estimated using the Pile Settlement Calculation (Module 15) software, which applies Aoki & Lopes’s (1975) method. Results showed a wide variation between the methods analyzed, leading to pile depths lower than those in the original design. The estimated settlements ranged from 1 to 8 mm, and the angular distortion between contiguous piles did not compromise the building’s functionality.