ANÁLISE DE ESTABILIDADE DE BARRAGEM ALTEADA PARA MONTANTE POR DOIS MÉTODOS DE EQUILÍBRIO LIMITE

Resumo

The serious consequences of human life losses and environmental disasters make stability
analysis of dams slopes play a key role in geotechnical engineering. Recently, we have witnessed events
related to the ruptures that make the safety of dams gain more and more relevance and prominence.
Already established methodologies such as Simplified Bishop are used for algebraic calculations of
slope stabilities. However, they require a lot of calculation and effort when applied to very robust
structures. The increasing availability of microcomputers brings important facilities in the systematic
application of these slope stability methods, so that more general and comprehensive analyzes can now
be performed. The commercial software Slope/W, from the GeoStudio package, and Slide, from

Rocsience, are intended for slope stability analysis, simulating the parameters of drained and non-
drained soil resistance of the structure along with water and piezometric lines, using the equilibrium

limit, which has been widely employed for these stability analyzes due to the mathematical simplicity
with which they are formulated and the accuracy obtained. Thus, reflecting on the importance of stability
analysis of dams, this study aimed to evaluate the stability of a tailings dam, located in the iron
quadrilateral (Minas Gerais), using both commercial software. The geotechnical parameters of the
materials were determined through field tests. For the sections analyzed, the variation between the
limiting equilibrium methods used and between the programs that evaluated them.