Título: | ANALYSIS OF GEOGRID REINFORCED SOIL TESTS | ||||||||||||||||||||||||||||||||||||||||
Autor: |
CHRISTIANO FARIA TEIXEIRA |
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Colaborador(es): |
ALBERTO DE SAMPAIO FERRAZ JARDIM SAYAO - Orientador ANA CRISTINA CASTRO FONTENLA SIEIRA - Coorientador |
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Catalogação: | 06/MAR/2007 | 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=9595&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=9595&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.9595 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
The use of geosynthetic materials as reinforcement in
geotechnical
engineering works is significantly increasing over the
past decades. Geogrid,
whose primary functions is reinforcing the soil mass, is
one of the geosynthetics
that has been used. In a reinforced soil structure, there
are different types of
interaction between soil and geogrid. To be possible to
obtain reliable design
parameters is essential to know the mobilized mechanisms
in the interaction.
This situation has been investigated by many researchers,
but there are still
many aspects to be better understood about geogrid
reinforced soil behavior. In
this research, numerical tools have been used to improve
our knowledge about
reinforced soil techniques. Numerical modeling of triaxial
and direct shear tests
on reinforced and non reinforced soils were carried out
using software Plaxis. It
was verified the resistance and stiffness increase of the
soil due to geogrid
inclusion and the interface soil-reinforcement resistance
parameters. To
calibrate the software and to validate the numerical
analyses, back-analyses of
the tests carried out by Sieira (2003) were done. These
results helped to define
important aspects to the tests modeling such as geometry
and tests boundary
conditions. The numerical analyses of the triaxial tests
suggest that the software
Plaxis reasonably allow an adequate reproduction of the
reinforced soil tests. It
was possible to foresee the increase of soil resistance
because of
reinforcement inclusion. In addition, an alternative
analysis, where one applies a
confining stress that reproduces the reinforcement
influence, it was done.
Numerical analyses of non reinforced direct shear tests
had numerically
evidenced the rotation of the axis of the principal
stresses directions and the
presence of a central zone of shear (shear zone). The soil-
geogrid interface
resistance was not well reproduced, indicating that Plaxis
does not allow this
type of evaluation. To inclined reinforcement relative to
failure plane, it was
verified the maximum gain of resistance is achieved with
inclined reinforcement
at 60º and when rigid geogrids are used.
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