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Publication
Prolongamento do quebra-mar exterior do Porto de Leixões: metodologia construtiva e condições geotécnicas
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| 22.99 MB | Adobe PDF |
Advisor(s)
Abstract(s)
As estruturas portuárias desempenham atualmente um papel que contribui diretamente para a atividade económica e para a criação de emprego a nível regional. Neste contexto, a APDL tem levado a cabo nos últimos anos ações de reforma, reestruturação e modernização da sua área portuária de maneira a conseguir responder a toda a espécie de desafios que se vão assomando, bem como a todos aqueles que se conjeturam a médio-longo prazo. O presente trabalho incide nos processos e metodologias construtivas inerentes a uma destas ações, nomeadamente o projeto de requalificação respeitante à extensão do quebra-mar exterior do Porto de Leixões. São enumerados e descritos os principais eventos desfavoráveis que interatuam com este tipo de obras, sobretudo aquelas que estão correlacionadas com a agitação marítima. Previamente à análise do caso de estudo é descrita a evolução histórica deste porto, desde a sua construção até à atualidade. É realizado o enquadramento da obra através da análise da geomorfologia, geologia e geotecnia da área da intervenção. Para a obtenção de um acurado enquadramento geológico-geotécnico foram analisadas as campanhas de prospeção realizadas pelas empresas Tecnasol, Geoma, Consulmar, UA, Geosub e Argonvia. São apresentadas as estruturas de proteção usualmente implementadas num porto e é abordado o processo construtivo de um quebra-mar de taludes; tipologia selecionada para o projeto de extensão. Por fim, é descrito e analisado o projeto de prolongamento do quebra-mar do Porto de Leixões, dando especial atenção à metodologia construtiva. Prevê-se que este projeto se inicie no segundo semestre de 2021 e que tenha uma duração aproximada de 30 meses. Após uma análise cuidada dos resultados das campanhas de prospeção, averigua-se que o trecho onde se vai realizar a obra apresenta uma espessa camada de aluviões sobre um maciço maioritariamente xistento. A metodologia construtiva mais adequada é a empreitada mista (via marítima e terrestre) devido às cotas definidas no projeto.
Harbour structures currently play a role that directly contributes to economic activity and job creation at a regional level. In this context, APDL has carried out in recent years actions of reform, restructuring and modernization of its port area in order to be able to respond to all kinds of challenges that are arising, as well as to all those assumed in the medium to long-term. The present work will focus on the construction processes and methodologies inherent to one of these actions, namely the requalification project concerning the extension of the Port of Leixões outer breakwater. The main unfavourable events that interact with this type of works are listed and described, especially those correlated with maritime agitation. Prior to the analysis of the case study, the historical evolution of this port is described, from its construction to the present day. The framing of the work is carried out through the analysis of the geomorphology, geology, and geotechnics of the site of intervention. In order to obtain an accurate geologic-geotechnical framework, the in situ investigations campaigns carried out by Tecnasol, Geoma, Consulmar, UA, Geosub and Argonvia firms were analysed. The protection structures commonly implemented in a port are presented, and the rubble mound breakwater construction process is shown; type of structure selected for the extension project. Finally, the extension project of the Port of Leixões outer breakwater is described and examined, giving special attention to the construction methodology. This project is expected to start in the second half of 2021 and will have an approximate duration of 30 months. After careful analysis of the in situ campaigns results, it is concluded that the stretch where the work will be carried out presents a thick alluvium layer over bedrock mostly comprising schistose rocks. The most suitable construction methodology is the mixed contract (sea and land) due to the elevations set out in the project.
Harbour structures currently play a role that directly contributes to economic activity and job creation at a regional level. In this context, APDL has carried out in recent years actions of reform, restructuring and modernization of its port area in order to be able to respond to all kinds of challenges that are arising, as well as to all those assumed in the medium to long-term. The present work will focus on the construction processes and methodologies inherent to one of these actions, namely the requalification project concerning the extension of the Port of Leixões outer breakwater. The main unfavourable events that interact with this type of works are listed and described, especially those correlated with maritime agitation. Prior to the analysis of the case study, the historical evolution of this port is described, from its construction to the present day. The framing of the work is carried out through the analysis of the geomorphology, geology, and geotechnics of the site of intervention. In order to obtain an accurate geologic-geotechnical framework, the in situ investigations campaigns carried out by Tecnasol, Geoma, Consulmar, UA, Geosub and Argonvia firms were analysed. The protection structures commonly implemented in a port are presented, and the rubble mound breakwater construction process is shown; type of structure selected for the extension project. Finally, the extension project of the Port of Leixões outer breakwater is described and examined, giving special attention to the construction methodology. This project is expected to start in the second half of 2021 and will have an approximate duration of 30 months. After careful analysis of the in situ campaigns results, it is concluded that the stretch where the work will be carried out presents a thick alluvium layer over bedrock mostly comprising schistose rocks. The most suitable construction methodology is the mixed contract (sea and land) due to the elevations set out in the project.
Description
Keywords
Porto de Leixões Geotecnia portuária Desenvolvimento portuário Engenharia costeira Port of Leixões Harbour Geotechnics Port Development Coastal Engineering