Análise indireta do efeito da sucção em ensaios UCS cíclicos de um solo estabilizado e reforçado com fibras
DOI:
https://doi.org/10.14195/2184-8394_162_1Palavras-chave:
solo estabilizado, fibras sintéticas, carregamento cíclico, sucçãoResumo
Quando um material é sujeito a carregamento cíclico há alterações no comportamento geomecânico que devem ser conhecidas e caracterizadas para otimizar o binómio segurança-custo de uma dada obra. Para atingir tal objetivo, no presente trabalho apresenta-se uma série de ensaios de resistência à compressão não confinada e triaxiais, monotónicos e previamente submetidos a carregamento cíclico, com e sem membrana a envolver os provetes durante a fase cíclica, para avaliar indiretamente o efeito da sucção num solo mole quimicamente estabilizado e reforçado com fibras. Os resultados são analisados em termos de evolução da deformação axial permanente acumulada, da energia elástica e plástica e da resistência à compressão não confinada, tendo-se observado que a ocorrência de sucção promove um aumento das deformações plásticas acumuladas, da energia elástica e plástica e da resistência à compressão, sendo estes efeitos mitigados com a utilização de uma membrana a envolver os provetes.
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