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Efeito de confinamento das geogrelhas: Análise da composição granulométrica do agregado
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O uso de geogrelhas no reforço e estabilização de materiais granulares tem-se reveladouma solução eficiente, durável e sustentável em diversas aplicações, incluindo estradasnão revestidas, aterros e taludes. A sua eficácia está diretamente relacionada comainteração entre a geogrelha e o agregado, a qual depende de parâmetros comoadistribuição granulométrica, a forma e a rigidez das partículas, bemcomodaspropriedades geométricas e mecânicas da própria geogrelha. A compreensão aprofundadadesses mecanismos é essencial para otimizar o desempenho das estruturas desoloreforçado, reduzir deformações e aumentar a vida útil das infraestruturas. A motivação para o desenvolvimento deste trabalho decorre da crescente necessidadedesoluções geotécnicas que conciliem eficiência técnica, viabilidade económicaesustentabilidade ambiental. O emprego de geossintéticos, e em particular de geogrelhas, permite reduzir o consumo de materiais naturais, melhorar a integridade estrutural domaterial compósito e favorecer o uso de agregados reciclados, contribuindo para práticasmais sustentáveis na Engenharia Civil. É neste contexto que se insere a presentedissertação, cujo objetivo geral é realizar uma revisão bibliográfica abrangente sobreainteração geogrelha–agregado, analisando os principais mecanismos de reforçoeestabilização, bem como o efeito da distribuição granulométrica no comportamentoconjunto do sistema solo-reforço. O estudo destaca a importância de compreender os fenómenos de imbricamento, atritoeconfinamento lateral, que governam a transferência de esforços entre o agregadoeageogrelha, e discute como diferentes combinações de materiais e condições decarregamento influenciam o desempenho global. A análise crítica da literatura demonstrao potencial das geogrelhas como elementos de reforço em soluções sustentáveis, combenefícios tanto técnicos quanto ambientais, contribuindo para o avanço do conhecimentotécnico-científico em Geotecnia.
The use of geogrids for the reinforcement and stabilisation of granular materials hasproven to be an efficient, durable, and sustainable solution in various applications, including unpaved roads, embankments, and slopes. Their effectiveness is directly relatedto the interaction between the geogrid and the aggregate, which depends on parameterssuch as particle size distribution, particle shape and stiffness, as well as the geometricandmechanical properties of the geogrid itself. A thorough understanding of thesemechanisms is essential to optimize the performance of reinforced soil structures, reducedeformations, and extend the service life of infrastructures. The motivation for this research arises from the growing need for geotechnical solutionsthat balance technical efficiency, economic feasibility, and environmental sustainability. The use of geosynthetics, particularly geogrids, helps reduce the consumptionof natural materials, improve the structural integrity of the composite material, and promote theuseof recycled aggregates, thus contributing to more sustainable practices inCivil Engineering. Within this context, the main objective of this dissertation is to carryout acomprehensive literature review on geogrid–aggregate interaction, analysing thekeyreinforcement and stabilisation mechanisms, as well as the influence of particlesizedistribution on the overall behaviour of the soil–reinforcement system. The study emphasizes the importance of understanding the interlocking, friction, andlateral confinement phenomena that govern load transfer between the aggregate andthegeogrid, and discusses how different combinations of materials and loading conditionsaffect overall performance. The critical review of the literature demonstrates the potential of geogrids as reinforcement elements in sustainable solutions, offering both technical andenvironmental benefits, and contributing to the advancement of technical andscientificknowledge in Geotechnics.
The use of geogrids for the reinforcement and stabilisation of granular materials hasproven to be an efficient, durable, and sustainable solution in various applications, including unpaved roads, embankments, and slopes. Their effectiveness is directly relatedto the interaction between the geogrid and the aggregate, which depends on parameterssuch as particle size distribution, particle shape and stiffness, as well as the geometricandmechanical properties of the geogrid itself. A thorough understanding of thesemechanisms is essential to optimize the performance of reinforced soil structures, reducedeformations, and extend the service life of infrastructures. The motivation for this research arises from the growing need for geotechnical solutionsthat balance technical efficiency, economic feasibility, and environmental sustainability. The use of geosynthetics, particularly geogrids, helps reduce the consumptionof natural materials, improve the structural integrity of the composite material, and promote theuseof recycled aggregates, thus contributing to more sustainable practices inCivil Engineering. Within this context, the main objective of this dissertation is to carryout acomprehensive literature review on geogrid–aggregate interaction, analysing thekeyreinforcement and stabilisation mechanisms, as well as the influence of particlesizedistribution on the overall behaviour of the soil–reinforcement system. The study emphasizes the importance of understanding the interlocking, friction, andlateral confinement phenomena that govern load transfer between the aggregate andthegeogrid, and discusses how different combinations of materials and loading conditionsaffect overall performance. The critical review of the literature demonstrates the potential of geogrids as reinforcement elements in sustainable solutions, offering both technical andenvironmental benefits, and contributing to the advancement of technical andscientificknowledge in Geotechnics.
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Estabilização Agregado Distribuição Granulométrica Geogrelhas Geotecnia Interação Geogrelha-Agregado Reforço Revisão Bibliográfica Sustentabilidade