Perícia de um edifício residencial que sofreu recalque diferencial: estudo de caso

Abstract

This research is a case study of an experimente carried out in a buiding that underwent differential repression, in the city of Toledo – Paraná. For this, it were analyzed the consequences of building up as a result of the repression suffered. The methodological procedures contemplated the identification of the pathologies by means of an on-site survey and analysis of the possible causes according to the literature and analysis of the forensic report. With this, it was possible to generate the damage map of the fissures inside and outside the building. In the same way, the type of foundation reinforcement used was verified comparing with other methods presented in the literature. As a result, the fissures found in 45º located in both internal and common areas may have been caused due to repression. Horizontal fissures were also found, which due to their characteristics were due to traction and compression of the concrete. As for the pathologies found on the ground floor, the anomalies at the base of the pillars, the vertical crack in one of the pillars and the crack in the wall were caused by the negative movement of the soil, ie, by differential repression. As for the foundation reinforcement, during the diligences it was analyzed that the method used for the reinforcement was that of mega stakes through hydraulic jacks. Where these objects served as an instrument to insert the stakes into the soil, bringing the stability of the structure again. This method was used, since it allows to be used in soils with presence of water, as well as does not cause vibrations in the soil. These points are very important for the case analysis. Other methods have been presented as a form of comparison, such as metal stakes, wood stakes, reinforced concrete and micro-stakes, but none of them meet the needs of the case in question. In order to confirm the correct choice of method used in the building.