Estudo comparativo entre taludes em solos reforçados com jet grouting e contenções
Tipo
TCC
Data de publicação
2021-12
Periódico
Citações (Scopus)
Autores
Costa, Carolina de Oliveira
Reimberg, Guilherme Calsavara
Santos, Ligia Varanda Jarandilha
Reimberg, Guilherme Calsavara
Santos, Ligia Varanda Jarandilha
Orientador
Seko, Kamila Rodrigues Cassares
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Título de Volume
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Resumo
O objetivo deste trabalho é estudar a viabilidade técnico econômica de taludes em solos reforçados com jet grouting e contenções sem ancoragens, sendo perfis metálicos com prancheamento em madeira e estacas hélice contínua justapostas as soluções consideradas a título de comparação. Para isso, foi realizado um estudo de caso sobre uma obra que apresenta uma grande proximidade em relação a um túnel do metrô do Município de São Paulo. A solução adotada e executada para a obra foi colunas de solo-cimento jet grouting com o objetivo de melhoria das propriedades do solo para assim escavá-lo, haja visto que seria inviável uma metodologia que emprega ancoragem ativa, como o uso de tirantes, sem gerar interferência ou possíveis danos à estrutura do túnel. Baseado nas informações do relatório da sondagem, foram determinados os parâmetros geotécnicos do solo e compreendido o perfil do subsolo para prosseguir com os dimensionamentos geotécnicos por meio da Teoria de Rankine e estruturais conforme procedimentos clássicos da literatura. Os cálculos foram realizados manualmente com o auxílio da ferramenta da Microsoft Excel® da Microsoft Office® e a obtenção dos momentos fletores, forças cortantes e deslocamentos a partir do software Ftool®. Após a etapa de dimensionamento, foi possível analisar comparativamente as metodologias em estudo baseadas em parâmetros de custo e prazo de execução. Por meio desta análise, entendeu-se que a solução em perfis metálicos com prancheamento em madeira seria a mais viável, inclusive ao considerar a utilização do equipamento “saca-perfil”
The aim of this work is to study the economic technical feasibility of reinforced soils slopes with jet grouting and retaining walls without anchorages, like soldier-pile and wood lagging wall and tangent continuous flight auger piles it are solutions considered for comparison. Because of this, the case was carried out on a project that is near to a subway tunnel in São Paulo city. The solution adopted and implemented for the work was jet grouting soil-cement columns with the purpose of improving the properties of the soil in order to dig it, considering that a methodology that employs active anchoring, such as the use of anchors, would be unfeasible generating interference or possible damage to the tunnel structure. Based on information from the partial geotechnical site investigation report, the soil geotechnical parameters were determined and the subsoil profile was understood in order to proceed with the geotechnical dimensioning using Rankine's Theory and follow classical procedures in the literature. Calculations were performed manually with the aid of the Microsoft Excel® of Microsoft Office® tool and the bending moments, shear force and displacements were obtained from the Ftool® software. After a computational step, it was possible to comparatively analyze the methodologies under study based on cost and time parameters. Through this analysis, the results shows that the solution in soldier-pile and wood lagging wall would be the most feasable, even when considered using the machine to remove the soldier-pile out of the ground.
The aim of this work is to study the economic technical feasibility of reinforced soils slopes with jet grouting and retaining walls without anchorages, like soldier-pile and wood lagging wall and tangent continuous flight auger piles it are solutions considered for comparison. Because of this, the case was carried out on a project that is near to a subway tunnel in São Paulo city. The solution adopted and implemented for the work was jet grouting soil-cement columns with the purpose of improving the properties of the soil in order to dig it, considering that a methodology that employs active anchoring, such as the use of anchors, would be unfeasible generating interference or possible damage to the tunnel structure. Based on information from the partial geotechnical site investigation report, the soil geotechnical parameters were determined and the subsoil profile was understood in order to proceed with the geotechnical dimensioning using Rankine's Theory and follow classical procedures in the literature. Calculations were performed manually with the aid of the Microsoft Excel® of Microsoft Office® tool and the bending moments, shear force and displacements were obtained from the Ftool® software. After a computational step, it was possible to comparatively analyze the methodologies under study based on cost and time parameters. Through this analysis, the results shows that the solution in soldier-pile and wood lagging wall would be the most feasable, even when considered using the machine to remove the soldier-pile out of the ground.
Descrição
Palavras-chave
Jet grouting , contenção , taludes , retaining walls. , soils slopes