
handle: 10216/83436
O presente artigo refere-se à análise de um aterro sobre solos moles através do programa de elementos finitos Plaxis® comparando a solução implementada (com geodrenos e pré-carga) com uma solução de tratamento em Deep Soil Mixing (DSM). Foram analisadas várias soluções alternativas em DSM, alterando o espaçamento entre as colunas, o tempo de cura, e até a existência ou não de uma plataforma de transferência de cargas. Para cada caso, os assentamentos foram aferidos e comparados verificando se satisfaziam os requisitos do caderno de encargos. Finalmente foi ainda efetuada uma análise de viabilidade económica com comparação do tempo de execução e dos custos associados às várias soluções.
In the present work an embankment on soft soil is analyzed with commercial finite element software (Plaxis® ) in order to compare the solution implemented on site (with drains and preloading) with a soil improvement solution in Deep Soil Mixing (DSM). Several alternative solutions in DSM were studied changing the column spacing, the curing time, as well as the inclusion of a load transfer platform. For each case the settlements were analyzed and compared to evaluate if the necessary requirements in terms of limit values were satisfied. Finally, a cost-benefit analysis was performed focused on the execution time and cost of each solution.
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