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ETDs @PUC-Rio
Estatística
Título: ASSESSMENT OF THE UNDRAINED BEHAVIOR OF SANDS
Autor: ARTHUR SANTOS COELHO
Colaborador(es): ALEXANDRE STREET DE AGUIAR DELBERIS ARAUJO LIMA ALBERTO DE SAMPAIO FERRAZ JARDIM SAYAO - Orientador
SANDRO SALVADOR SANDRONI - Coorientador
Catalogação: 15/JAN/2019 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=36118&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=36118&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.36118
Resumo:
Many authors agree that loose sands, under increasing undrained loading and liquefaction favorable granulometry, necessarily liquefy at some moment. This work has as main objective to evaluate if two sand specimens, with characteristics very different from each other, under the same conditions as described above, enter into liquefaction. The first specimen is a clean sand that was extracted from a hydraulic embankment located in Camboinhas, Niterói, RJ, Brazil. The second is a sandy tailing of iron extracted from a tailing dam located in Mariana, MG, Brazil. The evaluations were made through triaxial compression tests with controlled deformation. The behavior of these materials was evaluated under conditions of low compactness and under different confininig pressure, in order to observe if liquefaction would occur. In case of no liquefaction, the objective was understand the reasons for such response and in case of occurrence, evaluate the influence of the confining pressure, as well as mark the zones of instability undrained. It was verified that the Camboinhas sand entered in total liquefaction only for low confining pressure, and it has the opposite behavior to the normal behavior of loose granular soils, having low strength to liquefaction in low confining pressure and high strength to liquefaction in large confining pressure. The Mariana granular tailing also entered in total liquefaction for low and higth confinig pressure. The tailing showed different behavior of the Camboinhas sand and similar to the behavior normally obtained in loose granular soils under undrained conditions.
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