Análise 2d e 3d da estabilidade da Barragem de Fundão
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Data
2019-05-12
Título da Revista
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Editor
Universidade Federal de Goiás
Resumo
The failure of the Fundão Dam, the largest disaster of its kind in the world,
was studied by Morgenstern et al. (2016) using two-dimensional approaches. The carried
out investigation did not point to mechanisms of slope instability as the causes of the
disaster. However, the complex shape of the dam and its concave and convex regions
were not originally considered due to limitations of the analysis tools employed. This
paper presents two-dimensional (2D) and three-dimensional (3D) analyses that are more
rigorous and well suited for the Fundão dam geometry. Slope stability analyses were
accomplished using the General Limit Equilibrium Method of Slices and Columns (GLE)
using the SVSLOPE software. Critical slip surfaces were searched in 2D and 3D, across the
entire dam face. Drained shear strength parameters led to Factors of Safety that would
indicate fairly stable conditions, with a lowest Factor of Safety of 1.744. Values close to
1.0 were obtained considering undrained conditions of the tailings, which are supposedly
less representative of field conditions. The 3D factors of safety were very close to the 2D
values, but with noticeably higher variations near the concave and convex regions. This
leads to the conclusion that the dam shape near the setback region requires closer
examination by means of 3D analyses that enable the identification of critical zones.
Descrição
Palavras-chave
Barragens de rejeito, Barragem de Fundão, Análise tridimensional, Fator de Segurança, Estabilidade de taludes, Tailings dams, Fundão Dam, Three-dimensional analysis, Factor of Safety, Slope stability
Citação
SOUZA, João Paulo Tavares; MOURA, Nícolas Rodrigues; GITIRANA Jr., Gilson de F. N. Análise 2d e 3d da estabilidade da Barragem de Fundão. Revista Eletrônica de Engenharia Civil, Goiânia, v. 15, n. 2, p. 123–136, 2020. Disponível em: https://www.revistas.ufg.br/reec/article/view/53450.