MEDIÇÃO DE RECALQUES EM EDIFICAÇÃO NA CIDADE DE JOÃO PESSOA/PB

Abstract

The NBR 6122 establishes the monitoring of repression as mandatory for some buildings, however this is not a common practice. The repression occurs due to deformation of the structure and the accommodation of the soil related to the loads to which they are being submitted. The objective of this work was to carry out the monitoring of a vertical building located in the city of João Pessoa, detailing the instrumentation and the procedure used during its construction to compare the measured loadings with the results obtained by tests of load tests carried out previously in the same building in accordance with NBR 12131 and with the expected settlements generated through the application of the Aoki & Lopes method. Through this work we can observe the influences in the performance of the building caused by the requests in the structure during the work. The methodology used to carry out the measurements was through the topography equipment, optical level, with the aid of graduated ruler and tripod. Piles were installed on the pillars of the building, to measure vertical displacements, and a bench mark in a place free of influences from the work itself or other nature, to ensure that it does not suffer displacements and interferences. Measurements were performed from June 2018 to April 2019, totaling eight measurements. By means of the analysis and comparison of the data it was possible to observe an increase of the predicted values in comparison with those measured in loco and even with the load acting on the structure being inferior to that of design, the measured repression was superior to the one obtained by the load test. Thus, the complexity of soil behavior when subjected to stress and the importance of the practice of measurement of settlements becomes more routine in order to obtain more realistic forecasts.