Comparação entre caracterização dos solos do Sudoeste Goiano por meio de ensaios laboratoriais e identificação tátil visual

Abstract

The Standard Penetration Test (SPT) is a method designed to provide information on the geotechnical properties of soil, and it has been widely used in Brazil. This method provides information on identification and classification of the different soil layers, groundwater level and soil loading capacity. The identification is obtained through rapid tests performed in the field, denominated visual tactile analysis. The lack of reliability in this method of analysis of the soil characteristics can be due to the empiricism involved in the method and generates a scenario of uncertainties regarding the results, and there is not parameter to perform this analysis considering the diversity of characteristics of different soils. This term paper aims to evaluate if the results of visual tactile identifications are in agreement with geotechnical characterizations obtained through laboratory tests. The results obtained from the visual tactile analysis were evaluated by using geotechnical characterization, through laboratory tests of samples from different soils of the southwestern region of Goias. These results were satisfactory, with most of the samples obtaining the same classification, but with peculiarities that resulted in divergences and could generate doubts. Attention should be paid when the soil has grains of similar size, as this proximity causes its characteristics to resemble one another and may cause misclassification of the sample. It should be noted that the tests present differences that do not allow a detailed comparison between the fine soil tests.