Título: | EVALUATION OF THE FIELD LATERAL STRESS OF OVERCONSOLIDATED CLAYS: LABORATORYTESTS IN A SOIL FROM THE GUABIROTUBA FORMATION | ||||||||||||||||||||
Autor: |
ROBERTA BOMFIM BOSZCZOWSKI |
||||||||||||||||||||
Colaborador(es): |
TACIO MAURO PEREIRA DE CAMPOS - Orientador FRANKLIN DOS SANTOS ANTUNES - Coorientador |
||||||||||||||||||||
Catalogação: | 27/SET/2001 | 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=1979&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=1979&idi=2 [es] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=1979&idi=4 |
||||||||||||||||||||
DOI: | https://doi.org/10.17771/PUCRio.acad.1979 | ||||||||||||||||||||
Resumo: | |||||||||||||||||||||
Most of the available laboratory methods for the evaluation
of the in situ horizontal stresses are usually applicable
only to normally consolidated or slightly overconsolidated
soils. The assessment of the in situ effective stresses
state of rigid, overconsolidated soils, and consequently of
their stress-strain performance , involves a considerable
degree of uncertainty due to the difficulty in the
determination of the field lateral stresses . This thesis
presents the results of an experimental study performed in
the laboratory to gather information on compressibility and
undrained stress-strain characteristics, and to determine
the in situ effective lateral stress of a soil from the
Guabirotuba Formation, at the Curitiba Sedimentary Basin,
in the South of Brasil. The first stage of the study
comprised characterization tests, mineralogical analysis
and electronic microscopy evaluations. After the physical
characterization of the material, it was carried out the
study on the stress-strain-strength behaviour through
undrained triaxial tests and oedometric tests with constant
rate of deformation. Unweathred and latherized soil samples
from the Guabirotuba formation were used in such
investigations. As the methodologies presented in the
literature are not appropriate for rigid, overconsolidated
soils, a new experimental technique for the determination
of the in situ lateral stress was proposed. The proposed
method is based on the concept of yield surfaces. The
stress history of a soil is related to its stress-strain
behaviour and, therefore, can be inferred through monitoring
changes of the soil rigidity under a given stress path.
Following the proposed methodology, stress-path controlled
triaxial tests with internal measurement of axial strains
were performed in undisturbed samples of the Guabirotuba
Formation, providing an assessment of the field lateral
stress of the material.
|
|||||||||||||||||||||
|