Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tde/1326 |
Resumo: | The hydraulic behavior of a tropical and unsaturated soil profile of Aparecida de Goiânia-GO is presented. The main objective of this research was to contribute to the understanding of hydraulic properties of a tropical soil, with special emphasis on the soil-water characteristic curves and its hysteresis. The research work done was divided into two main parts: physical, chemical and mineralogical characterization; and hydraulic behavior for the unsaturated condition. The characterization tests indicate that the soil profile studied is formed by two horizons. The top layer of 1,50 m comprised of transported material and a bottom layer comprised of young residual soil. The results of particle size analysis have shown that the various sample preparation conditions (i.e., with or without drying, chemical and physical disaggregation) produce different grain-size distribution curves. A varying state of disaggregation can be achieved, that state being dependent on the stability of the soil aggregates. A fairly good correspondence between conventional hydrometer and laser diffraction analysis was achieved, considering supposedly equivalent aggregation conditions. The soil-water characteristic curve (SWCC) was measured for both the natural and the soil reconstituted by mud consolidation. The role played by the soil fabric on the hydraulic behavior of the soil was analyzed. The SWCC was obtained for drying, wetting, and mixed paths, both in terms of total and matric suction. It was determined that the natural and reconstituted soils have distinct SWCCs. The disaggregation achieved with the reconstituted soil results in higher air-entry values and a unimodal SWCC, even when the natural soil presents a bimodal SWCC. Therefore, the pore-size distribution if affected by the different soil structures. The procedure for wetting and drying soil samples used along with the filter paper technique resulted in a number of SWCCs showing absence of hysteresis. The study of the moisture content along the specimen s heights revealed non-homogeneous moisture content distributions, even after 14 day of equilibrium of water potential. It was concluded that it is the very existence of SWCC hysteresis, along with a not sufficiently slow wetting and drying from the specimen surface that results in a non-homogeneous moisture content. |
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GITIRANA JUNIOR, Gilson de Farias Neveshttp://lattes.cnpq.br/4710728908810849VARGAS, Carlos Alberto Laurohttp://lattes.cnpq.br/3816106720170772http://lattes.cnpq.br/0775020377159696BORGES, Camilla Rodrigues2014-07-29T15:18:19Z2011-01-212010-04-30BORGES, Camilla Rodrigues. Hydraulic behavior of an unsaturated soil profile of Aparecida de Goiania-GO. 2010. 272 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2010.http://repositorio.bc.ufg.br/tede/handle/tde/1326The hydraulic behavior of a tropical and unsaturated soil profile of Aparecida de Goiânia-GO is presented. The main objective of this research was to contribute to the understanding of hydraulic properties of a tropical soil, with special emphasis on the soil-water characteristic curves and its hysteresis. The research work done was divided into two main parts: physical, chemical and mineralogical characterization; and hydraulic behavior for the unsaturated condition. The characterization tests indicate that the soil profile studied is formed by two horizons. The top layer of 1,50 m comprised of transported material and a bottom layer comprised of young residual soil. The results of particle size analysis have shown that the various sample preparation conditions (i.e., with or without drying, chemical and physical disaggregation) produce different grain-size distribution curves. A varying state of disaggregation can be achieved, that state being dependent on the stability of the soil aggregates. A fairly good correspondence between conventional hydrometer and laser diffraction analysis was achieved, considering supposedly equivalent aggregation conditions. The soil-water characteristic curve (SWCC) was measured for both the natural and the soil reconstituted by mud consolidation. The role played by the soil fabric on the hydraulic behavior of the soil was analyzed. The SWCC was obtained for drying, wetting, and mixed paths, both in terms of total and matric suction. It was determined that the natural and reconstituted soils have distinct SWCCs. The disaggregation achieved with the reconstituted soil results in higher air-entry values and a unimodal SWCC, even when the natural soil presents a bimodal SWCC. Therefore, the pore-size distribution if affected by the different soil structures. The procedure for wetting and drying soil samples used along with the filter paper technique resulted in a number of SWCCs showing absence of hysteresis. The study of the moisture content along the specimen s heights revealed non-homogeneous moisture content distributions, even after 14 day of equilibrium of water potential. It was concluded that it is the very existence of SWCC hysteresis, along with a not sufficiently slow wetting and drying from the specimen surface that results in a non-homogeneous moisture content.Um estudo do comportamento hidráulico de um perfil de solo tropical e não saturado de Aparecida de Goiânia-GO é apresentado nesta dissertação. O principal objetivo desta pesquisa foi contribuir para o entendimento das propriedades hidráulicas do solo, com especial ênfase na curva característica do solo e na sua histerese. O trabalho teve seu enfoque dividido em duas partes: caracterização física, química e mineralógica do perfil; e comportamento hidráulico do solo na condição não saturada. A partir da caracterização do solo, verificou-se que o perfil estudado se divide em dois extratos, um superior de 1,50 m de material transportado e um inferior residual jovem. Os resultados dos ensaios de granulometria mostraram que as várias combinações de preparação (i.e., com ou sem secagem prévia, desagregação química e desagregação física), produzem curvas granulométricas distintas. Variados graus de desagregação podem ser atingidos, sendo estes dependentes do grau de estabilidade das agregações do solo. Obteve-se uma boa correspondência entre a granulometria convencional e aquela utilizando o granulômetro a laser, para condições de desagregação supostamente equivalentes. A curva característica foi determinada tanto para o material natural, quanto para o solo reconstituído por adensamento a partir do estado de lama. Desta forma, procurou-se verificar o papel da estrutura no comportamento hidráulico do solo. As curvas características foram obtidas em trajetórias de secagem, molhagem, e mistas, tanto em termos de sucção matricial, quando de sucção total. Observou-se que o solo natural possui curvas características distintas do solo reconstituído. A desestruturação do solo reconstituído resulta em um maior valor de entrada de ar e uma curva característica unimodal, mesmo quando o material natural apresenta curva bimodal. Pode-se concluir que a distribuição de poros do material natural é afetada pela estruturação do solo. O procedimento de umedecimento e secagem utilizado com o método do papel filtro resultou em algumas curvas características com ausência de histerese. O estudo da distribuição da umidade ao longo da altura dos corpos de prova revelou que não se obteve umidades homogêneas, mesmo após os 14 dias, adotados como período para equilíbrio do potencial da água do solo. Pôde-se concluir que é exatamente a existência da histerese, aliada a um umedecimento ou secagem a partir da face dos corpos de prova que não são suficientemente lentos, que resultam na não homogeneidade de umidade.Made available in DSpace on 2014-07-29T15:18:19Z (GMT). No. of bitstreams: 1 Camilla Rodrigues 1.pdf: 4672017 bytes, checksum: 12b69633a9d9499c45b4c515dc8a718b (MD5) Previous issue date: 2010-04-30application/pdfhttp://repositorio.bc.ufg.br/TEDE/retrieve/4115/Camilla%20Rodrigues%201.pdf.jpgporUniversidade Federal de GoiásMestrado em Geotecnia e Construção CivilUFGBREngenhariasSolos não saturadosSolos tropicaisCurva característicaHisterese1.Solo não saturado 2.Solos tropicais 3.Curva característica 4.HistereseUnsaturated soilsTropical soilsSoil-water characteristic curveHysteresisCNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICAComportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GOHydraulic behavior of an unsaturated soil profile of Aparecida de Goiania-GOinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGORIGINALCamilla Rodrigues 1.pdfapplication/pdf4672017http://repositorio.bc.ufg.br/tede/bitstreams/0805db71-ed03-4d9e-806c-b9c561ed3fa4/download12b69633a9d9499c45b4c515dc8a718bMD51TEXTCamilla Rodrigues 1.pdf.txtCamilla Rodrigues 1.pdf.txtExtracted Texttext/plain148438http://repositorio.bc.ufg.br/tede/bitstreams/633b91a5-86d1-45b5-9d92-059cbe0a43eb/download0297ec38acf28c9ff58de838692c12cdMD52THUMBNAILCamilla Rodrigues 1.pdf.jpgCamilla Rodrigues 1.pdf.jpgGenerated Thumbnailimage/jpeg4052http://repositorio.bc.ufg.br/tede/bitstreams/e4010158-f10d-4f66-b9af-98f2ae91ac53/download86b2dbb69c303748d62f8325eb8b414cMD53tde/13262014-07-30 03:11:15.047open.accessoai:repositorio.bc.ufg.br:tde/1326http://repositorio.bc.ufg.br/tedeRepositório InstitucionalPUBhttp://repositorio.bc.ufg.br/oai/requesttasesdissertacoes.bc@ufg.bropendoar:2014-07-30T06:11:15Repositório Institucional da UFG - Universidade Federal de Goiás (UFG)false |
dc.title.por.fl_str_mv |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
dc.title.alternative.eng.fl_str_mv |
Hydraulic behavior of an unsaturated soil profile of Aparecida de Goiania-GO |
title |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
spellingShingle |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO BORGES, Camilla Rodrigues Solos não saturados Solos tropicais Curva característica Histerese 1.Solo não saturado 2.Solos tropicais 3.Curva característica 4.Histerese Unsaturated soils Tropical soils Soil-water characteristic curve Hysteresis CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA |
title_short |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
title_full |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
title_fullStr |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
title_full_unstemmed |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
title_sort |
Comportamento hidráulico de um perfil de solo não saturado de Aparecida de Goiânia-GO |
author |
BORGES, Camilla Rodrigues |
author_facet |
BORGES, Camilla Rodrigues |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
GITIRANA JUNIOR, Gilson de Farias Neves |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/4710728908810849 |
dc.contributor.advisor-co1.fl_str_mv |
VARGAS, Carlos Alberto Lauro |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://lattes.cnpq.br/3816106720170772 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/0775020377159696 |
dc.contributor.author.fl_str_mv |
BORGES, Camilla Rodrigues |
contributor_str_mv |
GITIRANA JUNIOR, Gilson de Farias Neves VARGAS, Carlos Alberto Lauro |
dc.subject.por.fl_str_mv |
Solos não saturados Solos tropicais Curva característica Histerese 1.Solo não saturado 2.Solos tropicais 3.Curva característica 4.Histerese |
topic |
Solos não saturados Solos tropicais Curva característica Histerese 1.Solo não saturado 2.Solos tropicais 3.Curva característica 4.Histerese Unsaturated soils Tropical soils Soil-water characteristic curve Hysteresis CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA |
dc.subject.eng.fl_str_mv |
Unsaturated soils Tropical soils Soil-water characteristic curve Hysteresis |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA |
description |
The hydraulic behavior of a tropical and unsaturated soil profile of Aparecida de Goiânia-GO is presented. The main objective of this research was to contribute to the understanding of hydraulic properties of a tropical soil, with special emphasis on the soil-water characteristic curves and its hysteresis. The research work done was divided into two main parts: physical, chemical and mineralogical characterization; and hydraulic behavior for the unsaturated condition. The characterization tests indicate that the soil profile studied is formed by two horizons. The top layer of 1,50 m comprised of transported material and a bottom layer comprised of young residual soil. The results of particle size analysis have shown that the various sample preparation conditions (i.e., with or without drying, chemical and physical disaggregation) produce different grain-size distribution curves. A varying state of disaggregation can be achieved, that state being dependent on the stability of the soil aggregates. A fairly good correspondence between conventional hydrometer and laser diffraction analysis was achieved, considering supposedly equivalent aggregation conditions. The soil-water characteristic curve (SWCC) was measured for both the natural and the soil reconstituted by mud consolidation. The role played by the soil fabric on the hydraulic behavior of the soil was analyzed. The SWCC was obtained for drying, wetting, and mixed paths, both in terms of total and matric suction. It was determined that the natural and reconstituted soils have distinct SWCCs. The disaggregation achieved with the reconstituted soil results in higher air-entry values and a unimodal SWCC, even when the natural soil presents a bimodal SWCC. Therefore, the pore-size distribution if affected by the different soil structures. The procedure for wetting and drying soil samples used along with the filter paper technique resulted in a number of SWCCs showing absence of hysteresis. The study of the moisture content along the specimen s heights revealed non-homogeneous moisture content distributions, even after 14 day of equilibrium of water potential. It was concluded that it is the very existence of SWCC hysteresis, along with a not sufficiently slow wetting and drying from the specimen surface that results in a non-homogeneous moisture content. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010-04-30 |
dc.date.available.fl_str_mv |
2011-01-21 |
dc.date.accessioned.fl_str_mv |
2014-07-29T15:18:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
BORGES, Camilla Rodrigues. Hydraulic behavior of an unsaturated soil profile of Aparecida de Goiania-GO. 2010. 272 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2010. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tde/1326 |
identifier_str_mv |
BORGES, Camilla Rodrigues. Hydraulic behavior of an unsaturated soil profile of Aparecida de Goiania-GO. 2010. 272 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2010. |
url |
http://repositorio.bc.ufg.br/tede/handle/tde/1326 |
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por |
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por |
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Universidade Federal de Goiás |
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Mestrado em Geotecnia e Construção Civil |
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UFG |
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BR |
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Engenharias |
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Universidade Federal de Goiás |
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