Provas de carga estática e dinâmica: desempenho de estacas hélice contínua monitorada

Abstract

In recent decades, geotechnical engineering has faced new demands related to foundation performance control, driven by the increasing requirements of technical standards and the execution of larger and more complex projects. In this context, technologies have emerged that allow for greater precision and control in foundation execution, such as Continuous Flight Auger (CFA) piles, which provide real-time monitoring of parameters such as depth, concrete consumption, and applied torque during installation. At the same time, NBR 6122 (ABNT, 2022) has reinforced the need for performance verification tests. Given this scenario, this research aims to understand the methodology, analyze the results, and compare static and dynamic tests applied to CFA piles, in order to assess the compatibility and limitations of these methods. To this end, 04 Static Load Tests (SLT) and 12 Dynamic Load Tests (DLT) were studied, focusing on the comparison of load vs. displacement curves. The comparative analyses made it possible to conclude that the static and dynamic tests have good correlations in terms of load capacity and displacement, validating the dynamic method. Both field tests showed discrepancies in relation to the load capacity estimated by semi-empirical methods, reinforcing the need for performing load tests for project validation.