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Projeto de Reabilitação da EM 607 no Concelho de Valongo
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Pretende-se com este trabalho fazer um estudo detalhado de um troço da Estrada Municipal 607, situado no concelho de Valongo, caracterizando o seu estado de degradação e definindo qual ou quais as soluções mais convenientes de reabilitação a adotar. O pavimento alvo deste trabalho é abrangido por três ruas pertencentes à EM 607, Rua de Vilar, Rua de Cabeda e Rua D. Pedro IV e apresenta uma extensão total de 4,8 km.
Este trabalho pode ser dividido em duas partes distintas: uma primeira parte, mais do âmbito teórico, onde é feita uma abordagem histórica desde o desenvolvimento dos pavimentos rodoviários até aos métodos e pavimentos existentes na atualidade e uma segunda parte, que diz respeito ao desenvolvimento prático do trabalho, onde é feito um estudo do pavimento e são apresentadas soluções de reabilitação e respetivos dimensionamentos.
Iniciou-se o estudo do pavimento com uma análise geral das patologias existentes, definindo o estado de degradação em que este se encontra. Concluiu-se que se estava na presença de um pavimento muito degradado, havendo troços com um nível de degradação muito elevado, o que proporciona desconforto na circulação dos condutores. Foi efetuado um estudo de tráfego de pesados, onde se percebeu que se tratava de um pavimento com intenso tráfego de pesados e que talvez este pavimento não esteja apto para o suportar. A retirada de carotes veio confirmar este pressuposto, pois as espessuras das camadas betuminosas mostraram ser insuficientes para o atual volume de tráfego.
As soluções de reabilitação foram ao encontro de várias soluções para diferentes situações, dando aos responsáveis da Câmara Municipal de Valongo a possibilidade de optarem por aquela que melhor se ajuste às suas necessidades, bem como às suas condições financeiras.
Assim, foram propostas três soluções para três capacidades de resistência e períodos de vida úteis distintos. A primeira solução engloba a remoção do pavimento existente e colocação de uma estrutura completamente nova, com três camadas betuminosas e dimensionada para o volume de tráfego atual, apresentando um período de vida útil de 20 anos, mas que é mais dispendiosa. A segunda solução apresenta apenas duas camadas betuminosas, onde seriam removidas apenas as camadas betuminosas, aproveitando a camada de sub-base. Esta solução tem um período de vida útil estimado de cerca de 8 anos. A terceira solução, com um período de vida útil de 5 anos, baseia-se na remoção parcial de uma largura da faixa de rodagem, aproveitando a restante. Na largura removida seria colocada uma estrutura de pavimento nova e dimensionada na segunda solução. Por último, foi dimensionado o sistema de drenagem transversal e longitudinal, sendo caracterizadas as linhas de águas e as respetivas bacias hidrográficas. As valetas e passagens hidráulicas existentes não estão dimensionadas para o atual escoamento de águas pluviais a que o pavimento está sujeito. As valetas são muito reduzidas, apresentando-se em alguns casos degradadas ou a necessitarem de limpeza urgente.
The aim of this project is to study, in detail, part of a municipal road, “Estrada Municipal 607”, located in the municipality of Valongo, by indicating its degradation condition and defining the best solution for its rehabilitation in terms of pavement. This pavement includes three roads that belong to EM 607- Rua de Vilar, Rua de Cabeda and Rua D. Pedro IV. This project can be divided into two different parts: the first part is in the theoretical framework where we have a historical approach from the development of road pavement up to the methods and pavement we have nowadays and the second part refers to the practical work, where an analysis of the pavement is done and rehabilitation solutions are presented, as well as their extension. We started studying the pavement by analysing the current problems and defining its state of degradation. It was concluded that it is a severely degraded pavement, which includes parts where the level of degradation is extremely high, originating discomfort in the drivers that use it. A study analysing the level of traffic was carried out and it indicated that this pavement is daily used by many trucks and maybe this pavement is not adequate for it. The removalof the “carotes”(part of the pavement) confirmed this theory because the thicknesses of the bituminous layers proved to be insufficient for the current flow of traffic. The rehabilitations solutions include several solutions for different situations, offering the people in charge of “Câmara Municipal de Valongo” the possibility to choose the best solution for them. So, they were given three rehabilitation solutions for different resistant capacities and for different periods of durability of the pavement. The first solution is to remove the present pavement and place a new structure with three bituminous layers, dimensioned for the current flow of traffic current. The pavement will last twenty years, however this solution is more expensive. The second solution is to place two bituminous layers after only removing the bituminous layers and maintaining the sub-base layer. With this solution the pavement will last eight years. The third solution, where the pavement will last five years, means removing one track of the pavement, using the rest. In the removed track of pavement we would place a new pavement structure dimensioned in the second solution. Finally, the transversal and longitudinal drainage system was dimensioned, indicating the water lines and their hydrographic basin. The current gutters and hydraulic passages aren't dimensioned for the pluvial drain that the pavement supports. The gutters are very small and in some cases they are degraded or need urgent cleaning.
The aim of this project is to study, in detail, part of a municipal road, “Estrada Municipal 607”, located in the municipality of Valongo, by indicating its degradation condition and defining the best solution for its rehabilitation in terms of pavement. This pavement includes three roads that belong to EM 607- Rua de Vilar, Rua de Cabeda and Rua D. Pedro IV. This project can be divided into two different parts: the first part is in the theoretical framework where we have a historical approach from the development of road pavement up to the methods and pavement we have nowadays and the second part refers to the practical work, where an analysis of the pavement is done and rehabilitation solutions are presented, as well as their extension. We started studying the pavement by analysing the current problems and defining its state of degradation. It was concluded that it is a severely degraded pavement, which includes parts where the level of degradation is extremely high, originating discomfort in the drivers that use it. A study analysing the level of traffic was carried out and it indicated that this pavement is daily used by many trucks and maybe this pavement is not adequate for it. The removalof the “carotes”(part of the pavement) confirmed this theory because the thicknesses of the bituminous layers proved to be insufficient for the current flow of traffic. The rehabilitations solutions include several solutions for different situations, offering the people in charge of “Câmara Municipal de Valongo” the possibility to choose the best solution for them. So, they were given three rehabilitation solutions for different resistant capacities and for different periods of durability of the pavement. The first solution is to remove the present pavement and place a new structure with three bituminous layers, dimensioned for the current flow of traffic current. The pavement will last twenty years, however this solution is more expensive. The second solution is to place two bituminous layers after only removing the bituminous layers and maintaining the sub-base layer. With this solution the pavement will last eight years. The third solution, where the pavement will last five years, means removing one track of the pavement, using the rest. In the removed track of pavement we would place a new pavement structure dimensioned in the second solution. Finally, the transversal and longitudinal drainage system was dimensioned, indicating the water lines and their hydrographic basin. The current gutters and hydraulic passages aren't dimensioned for the pluvial drain that the pavement supports. The gutters are very small and in some cases they are degraded or need urgent cleaning.