Comportamento mecânico de alguns tipos de solo através de ensaios triaxiais de cargas repetidas para projetos de pavimentos rodoviários

• Ano de defesa: 2009
• Autor(a) principal: Rezende, Danilo de Sá Viana
• Orientador(a): Carvalho, Carlos Alexandre Braz de
• Banca de defesa: Marques, Geraldo Luciano de Oliveira , Marangon, Márcio
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Engenharia Civil
• Departamento: Geotecnia
• País: BR
• Palavras-chave em Português: Deformação permanente; Módulo de resiliência; Mecânica dos pavimentos
• Palavras-chave em Inglês: Permanent deformation; Resilient modulus; Pavement mechanics
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA
• Link de acesso: http://locus.ufv.br/handle/123456789/816

This research addressed the study of the mechanical behavior of soils from the subgrade and subgrade reinforcement as highway construction materials emphasizing their permanent deformation response and its contribution in producing wheel paths in a hypothetical flexible pavement. The soils samples were collected from highway slopes from the area of influence of the city of Viçosa, Minas Gerais, Brazil, and the laboratory testing program encompassed the following tests: (i) geotechnical characterization; (ii) Proctor compaction at the Standard and Intermediate compaction efforts; (iii) repeated loads triaxial performed at the moisture contents Wopt and Wopt ± 2%. The obtained resilient modulus data base was used in the software Evestress for the determination of the stress distribution in the hypothetical pavement. The predicted stresses acting in the middle section of the studied layers were used as the stress-deviations in the repeated loads triaxial tests for the determination of the permanent deformations of the pavement layers. The permanent deformations were also determined using stress-deviations of 75 and 100 kPa in the specimens molded in the Proctor Intermediate compaction effort, and of 50 and 75 kPa for those molded in the Standard compaction effort. The principal products of this thesis were as follows: (i) development of a reliable procedure for estimating permanent deformations of the pavement layers; (ii) establishment of correlation among the permanent deformation, stress-deviations and number of load applications, as well as among the permanent deformation, tension deviation, number of load applications, moisture content and apparent dry specific weight; (iii) evaluation of the resilient modulus data using different mathematical models.