Caracterização geomecânica de solo do município de Russas-CE e exemplo de utilização em uma barragemde seção transversal típica : Análise da estabilidade de taludes.

Abstract

The soil is a stricty necessary element for civil construction. It is important to know its physi-cochemical characteristics and their applications, such as in the construction of dams. Charac-terizing and qualifying the soil of a region that has a socioeconomic impact is of fundamentalimportance in the field of civil engineering. Thus, the goal of this work is to characterize thesoil of a deposit located in the city of Russas, in the inland of Ceará, and to qualitatively analyzeits application through the analysis of the slope stability of an earth dam. For that, laboratorytests were used, such as granulometric analysis, the Atterberg limits (liquidity limit and plasticitylimit), using the Unified Classification System (UCSS), to classify the soil, real grain density,parameters of resistance through the triaxial test, compaction, permeability and finally, the slopestability analysis of a small dam, using the GeoStudio2020 software. The results showed that,in the liquidity limit test, the humidity found was 18,21%, and the plasticity limit was 11%.In the granulometric analisys, according to the UCSS, the soil showed characteristic SC, thatis, a clayey sand. The grain density was 2,66g/cm3, the optimum moisture of the soil sample(wotima) was 9,5% and the maximum apparent dry weight (γd) was 1,702g/cm3. The verifiedpermeability was 1,10x10−4cm/s, and the triaxial test resistence showed the cohesion parametersand angle of attrition at 14.4kPa and 29◦. Finally, the analysis of the slope stability showed thatthe downstream slope safety factor was 1,844 and the upstream slope was 3,406. It is possible toconclude that the soil studied in this current work presented the desirable physical and qualitativecriteria, as well as a safety margin for its possible applicability in dams, which are commonconstruction in the region, due to water scarcity issue.