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Abstract(s)
A Engenharia Civil, atualmente, atravessa uma fase de revolução tecnológica, onde a experiência e os métodos construtivos do passado aliam-se à inovação do presente, criando novas soluções com o objetivo de diminuir o custo e o tempo associado à execução de projetos e empreitadas. O presente trabalho debruça-se sobre estruturas do foro Geotécnico, cujo tema consiste no acompanhamento e análise da execução de uma estrutura de contenção de terras, inserida na Obra de Expansão da Linha Amarela do Metro do Porto, ao cargo do consórcio formado pelas empresas Ferrovial e ACA. Esta nova secção parte de Santo Ovídio em direção a Vila D’Este, alargando a rede de transportes públicos da cidade de Vila Nova de Gaia. O caso de estudo consiste numa cortina de estacas espaçadas, apoiada por ancoragens provisórias pré-esforçadas, com o propósito de permitir a execução de módulos de betão armado a céu aberto, que serão parte do acesso pedonal ao interior da nova Estação Manuel Leão – uma estrutura subterrânea, localizada no segmento de linha construído em túnel mineiro. Tendo em conta o projeto de execução deste caso de estudo, bem como as características geotécnicas aferidas durante os trabalhos de execução da cortina, foi possível modelar a estrutura, utilizando o programa de cálculo automático de elementos finitos da Rocscience (RS2), permitindo analisar os dados obtidos e compará-los com os valores lidos a partir dos aparelhos de monitorização, instalados ao longo da área de intervenção da estrutura. O principal objetivo deste trabalho é comparar o comportamento da estrutura de contenção de terras, evidenciado no modelo numérico, com o seu comportamento real, registado na instrumentação instalada, procurando identificar as causas associadas às diferenças entre estes dois conjuntos de valores e calibrar este modelo numérico, ainda em fase de construção, aumentando a fiabilidade dos resultados fornecidos relativos a momentos de construção mais avançados.
Civil Engineering is an area that is currently undergoing a phase of technological revolution, where the experience and construction methods of the past combine with the innovation of the present, creating new solutions with the aim of reducing the cost and time associated with projects and construction works. The present document focuses on Geotechnical structures, whose case study consists of the monitoring and analysis of a retaining wall execution, at the construction of the Yellow Line Expansion, whose owner is Metro do Porto and in charge of the construction is Ferrovial and ACA companies. This new section departs from Santo Ovídio towards Vila D’Este, expanding the public transport network in the city of Vila Nova de Gaia. The retaining wall is a curtain of spaced piles, supported by pre-stressed temporary anchors, with the purpose of allowing the execution of open-air reinforced concrete modules, which will be part of the pedestrian access to the interior of the new station Manuel Leão – an underground structure located on the line segment built by mining tunnel. Taking into account the execution project of this case study, as well as the geotechnical characteristics measured during the execution of the curtain, it was possible to modulate the structure using the automatic finite element calculation program - RS2, from Rocscience, allowing the analysis of the data obtained and comparing them with the values read from the monitoring devices installed along the area of intervention of the construction. The main objective of this work is to compare the behavior of the earth retaining wall, shown in the numerical model, with its real behavior, registered in the installed instrumentation at the construction site, in order to identify the causes associated with the differences between these two sets of values and calibrate this numerical model, that is still under construction, increasing the reliability of the results provided for more advanced construction stages.
Civil Engineering is an area that is currently undergoing a phase of technological revolution, where the experience and construction methods of the past combine with the innovation of the present, creating new solutions with the aim of reducing the cost and time associated with projects and construction works. The present document focuses on Geotechnical structures, whose case study consists of the monitoring and analysis of a retaining wall execution, at the construction of the Yellow Line Expansion, whose owner is Metro do Porto and in charge of the construction is Ferrovial and ACA companies. This new section departs from Santo Ovídio towards Vila D’Este, expanding the public transport network in the city of Vila Nova de Gaia. The retaining wall is a curtain of spaced piles, supported by pre-stressed temporary anchors, with the purpose of allowing the execution of open-air reinforced concrete modules, which will be part of the pedestrian access to the interior of the new station Manuel Leão – an underground structure located on the line segment built by mining tunnel. Taking into account the execution project of this case study, as well as the geotechnical characteristics measured during the execution of the curtain, it was possible to modulate the structure using the automatic finite element calculation program - RS2, from Rocscience, allowing the analysis of the data obtained and comparing them with the values read from the monitoring devices installed along the area of intervention of the construction. The main objective of this work is to compare the behavior of the earth retaining wall, shown in the numerical model, with its real behavior, registered in the installed instrumentation at the construction site, in order to identify the causes associated with the differences between these two sets of values and calibrate this numerical model, that is still under construction, increasing the reliability of the results provided for more advanced construction stages.
Description
Keywords
Estruturas de contenção de terras Expansão Linha Amarela Metro do Porto RS2 – Rocscience Modelação numérica Elementos finitos Earth retaining walls Yellow Line Expansion Metro do Porto RS2 – Rocscience Numerical Modeling Finite elements