Análise de fundação com estacas em situação de falha na pega do concreto - estudo de caso

Abstract

This work presents a case study on pathological manifestations in foundations using continuous flight auger piles, executed in a 12-story residential building. The problem identified occurred due to the improper use of a set-retarding admixture in the concrete, which resulted in piles that did not achieve the expected setting time. Based on bibliographic and normative analysis, the main pathological manifestations in foundations were discussed, as well as remediation and complement techniques. The studied case was solved through the execution of additional piles connected by complementary pile caps, ensuring the stability of the structure. The results showed that, even the initially compromised piles presented satisfactory strength after testing, indicating that less costly alternatives could have been considered. It is concluded that the alignment between design and execution, combined with strict control of materials and procedures, is essential to avoid foundation pathologies and delays in the construction schedule.