Título: | DEVELOPMENT OF A SERVO-CONTROLLED CYCLIC TRIAXIAL CELL AND STUDY OF THE LIQUEFACTION SUSCEPTIBILITY OF TAILINGS FROM AN IRON MINING | ||||||||||||||||||||||||||||||||||||||||||||||||
Autor: |
SERGIO TIBANA |
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Colaborador(es): |
TACIO MAURO PEREIRA DE CAMPOS - Orientador GEORGE DE PAULA BERNARDES - Coorientador |
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Catalogação: | 10/JAN/2002 | Língua(s): | PORTUGUESE - BRAZIL |
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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. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=2212&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=2212&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.2212 | ||||||||||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||||||||||
This work presents results of na experimental research
programme executed in the laboratory at PUC-Rio, Brazil.
The aim of this research was investigated the stress-strain
behaviour and the evaluation of the susceptibility of fine
grained tailing material from Fernandinho Mine to
liquefaction. This mine is at Quadrilatero Ferrífero (Minas
Gerais - Brazil), region with one of the largest sources of
iron ore in Brazil.In order to study the susceptibility to
liquefaction of tailing material an servocontrolled
triaxial device was developed. This device were composed
by: triaxial cell, servo-motors,pressure regulators,
microcomputer, one digital analogy convert of, one analogy
digital convert developed in the laboratory at PUC-Rio and
other accessories. During the development of the device,
one software to control all the trajetories was
implemented. Using this device some cyclic and monotonic
triaxial tests were carried out.Complete characterization,
mineralogical and eletronic microscope analysis were
carried out in the preliminary steps of this research.
After this, an extensive programme of triaxial tests were
carried out in order to determine the failure envelope,
stress-strain behaviour and liquifiction resitance of the
tailing material.A colapsive behavior of the tested
material was observed at small strain and stress
conditions. Another important observation was the high
level of poropressure development,suggesting that this
material is susceptible to liquefaction in special
conditions.Finally, based on the test results, a new
methodology is proposed to investigate soils when submitted
to undrained conditions.
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