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Authors
Advisor(s)
Abstract(s)
O trabalho proposto caracteriza mecanicamente uma areia-siltosa da região de Bragança,
através de ensaios laboratoriais de identificação e ensaios triaxiais, com objetivo de apresentar
o comportamento drenado e não drenado das amostras, realizando a comparação
dos resultados em amostras indeformadas recolhidas in-situ e reconstituídas em laboratório,
também há a apresentação de todos os procedimentos do ensaio triaxial, demonstrando
e relatando todas as particularidades do equipamento usado nos testes. O ensaio triaxial
é um teste de laboratório direcionado para a caracterização mecânica de solos, fornecendo
a resistência ao corte e a rigidez do solo para a realização de projetos geotécnicos. No
ensaio triaxial há vantagens em relação a outros ensaios com mesmo propósito, pois possui
controle de drenagem da amostra e medição da poro pressão ao longo de todas as fases
do ensaio. O ensaio triaxial disponibiliza os parâmetros de resistência, como o ângulo
de atrito interno, a coesão drenada, e não drenada. As amostras são isoladas em uma
membrana de borracha, após as devidas preparações a mesma é saturada, consolidada
e por fim submetida a corte, valendo ressaltar que há três variações de ensaio, sendo o
consolidado drenado (CD), consolidado não-drenado (CU) e não consolidado não drenado
(UU). Todas estas possibilidades serão testadas em laboratório em uma areia-siltosa da
região de Bragança. Como resultado final analisou o seu comportamento in-situ, por meio
das amostras indeformadas, buscando comparar com resultados obtidos nas amostras reconstituídas
em laboratório, no entanto houveram diferenças relativas a consolidação de
cada amostra, valendo ressaltar que todas as amostras possuem o mesmo volume e valores
aproximados de teor em água, apesar da comparação de resultados estar prejudicada e
o solo testado não ser o ideal para todas as variações de ensaio, ao decorrer de toda a dissertação está contida todas as particularidades encontradas no ensaio e as experências
adiquiridas com o uso do equipamento.
The proposed work mechanically characterizes a silty sand from the region of Bragança, through laboratory tests of identification and triaxial tests, with the objective of presenting the drained and undrained behavior of the samples, performing the comparison of the results in undisturbed samples collected in-situ and reconstituted in laboratory, there is also a presentation of all the procedures of the triaxial test, demonstrating and listing all the peculiarities of the equipment used in the tests. The triaxial test is a laboratory test aimed at the mechanical characterization of soils, providing cut resistance and soil stiffness for carrying out geotechnical projects. In the triaxial test, there are advantages in relation to other tests with the same objective, as it has control of sample drainage and pressure pore measurement throughout all phases of the test. The triaxial test provides resistance parameters, such as the angle of internal friction, drained and undrained cohesion. The samples are isolated on a rubber membrane, after the preparations are saturated, consolidated and finally cut, it is worth mentioning that there are three types of tests, the consolidated being drained (CD), consolidated not draining (CU) and the unconsolidated undrained (UU). All of these possibilities will be tested in a silty sand laboratory in the region of Bragança. With the final result, his behavior in situ was analyzed, using undisturbed samples, trying to compare with the results obtained in samples reconstituted in the laboratory, but there were differences regarding the consolidation of each sample, it is woth metioning that all samples have the same volume and approximate values to the water content, although the comparison of the results is impaired and the soil is not ideal for all tests, throughout the dissertation is contained particularities shown in the tests and in the experiences acquired with the use of the equipment.
The proposed work mechanically characterizes a silty sand from the region of Bragança, through laboratory tests of identification and triaxial tests, with the objective of presenting the drained and undrained behavior of the samples, performing the comparison of the results in undisturbed samples collected in-situ and reconstituted in laboratory, there is also a presentation of all the procedures of the triaxial test, demonstrating and listing all the peculiarities of the equipment used in the tests. The triaxial test is a laboratory test aimed at the mechanical characterization of soils, providing cut resistance and soil stiffness for carrying out geotechnical projects. In the triaxial test, there are advantages in relation to other tests with the same objective, as it has control of sample drainage and pressure pore measurement throughout all phases of the test. The triaxial test provides resistance parameters, such as the angle of internal friction, drained and undrained cohesion. The samples are isolated on a rubber membrane, after the preparations are saturated, consolidated and finally cut, it is worth mentioning that there are three types of tests, the consolidated being drained (CD), consolidated not draining (CU) and the unconsolidated undrained (UU). All of these possibilities will be tested in a silty sand laboratory in the region of Bragança. With the final result, his behavior in situ was analyzed, using undisturbed samples, trying to compare with the results obtained in samples reconstituted in the laboratory, but there were differences regarding the consolidation of each sample, it is woth metioning that all samples have the same volume and approximate values to the water content, although the comparison of the results is impaired and the soil is not ideal for all tests, throughout the dissertation is contained particularities shown in the tests and in the experiences acquired with the use of the equipment.
Description
Dupla diplomação com a UniEvangélica
Keywords
Ensaio triaxial Caracterização geotécnica Amostragem Ensaios laboratoriais