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Resumo(s)
O desenvolvimento da ferrovia de alta velocidade (LAV) em Portugal apresenta desafios
geotécnicos significativos, uma vez que o traçado cruza diversas formações geológicas com
características mecânicas diversas. Neste contexto a estabilidade da infraestrutura está intima-
mente relacionada com as condições do terreno e a interação terreno-estrutura. Dadas as exi-
gências de elevados níveis de desempenho e segurança, especialmente devido às velocidades
elevadas de circulação dos comboios, é essencial assegurar que o terreno seja capaz de supor-
tar, adequadamente, as cargas dinâmicas e as vibrações a que está submetido, mantendo a
sua estabilidade ao longo do tempo.
Estes desafios são ampliados pela diversidade litológica ao longo do traçado, incluindo
zonas aluvionares, diversas com solos moles, maciços carbonatados cársicos, e outras condi-
ções que influenciam diretamente a construção e operação da futura ferrovia, podendo com-
prometer a sua eficiência e a segurança.
A solução proposta assenta num estudo geotécnico detalhado do terreno, que a inves-
tigação desenvolvida nesta dissertação acompanhou no troço entre Soure e o Carregado, parte
da 2ª Fase, do Lote C, da LAV Porto-Lisboa. A partir da campanha de prospeção e dos seus
vários componentes, elabora-se uma análise e interpretação das diversas informações adqui-
ridas, uma ferramenta fundamental para a identificação das soluções mais adequadas ao de-
senvolvimento da infraestrutura. Este estudo baseia-se nas técnicas mais adequadas e conhe-
cimentos da Engenharia Geológica, com especial enfoque na análise dos aspetos geotécnicos
que afetam diretamente a viabilidade do projeto.
Os resultados obtidos terão um impacto relevante na futura construção da LAV, per-
mitindo uma compreensão mais aprofundada dos desafios geotécnicos ao longo do traçado
e fornecendo orientações fundamentais para a definição de soluções construtivas adequadas,
e contribuindo, deste modo, para a otimização do projeto, com especial enfoque na segurança
e eficiência da operação ferroviária.
The development of the high-speed railway (HSR) in Portugal poses significant geote- chnical challenges, as the alignment crosses various geological formations with different me- chanical properties. In this context, the stability of the infrastructure is closely related to ground conditions and ground–structure interaction. Given the demanding performance and safety requirements, particularly due to the high operating speeds of the trains—it is essential to ensure that the ground can adequately withstand dynamic loads and vibrations while main- taining long-term stability. These challenges are amplified by the lithological diversity found along the route, which include alluvial zones, some with soft soils, karstified carbonate rock mass, and other conditions that directly affect both construction and operation of the railway, potentially compromising its efficiency and safety. The proposed solution relies on a detailed geotechnical study of the ground carried out in the Soure and Carregado section, part of Phase 2, Lot C, of the Porto–Lisbon HSR. Based on the site investigation campaign and its various components, this study develops a comprehen- sice analysis and interpretation of the acquired data, serving as a fundamental tool for identi- fying the most suitable solutions for infrastructure development. It applies state-of-the-art methods and geological engineering knowledge, with special focus on geotechnical aspects that directly impact the project feasibility. The findings of this dissertation will provide a valuable insights for the future comstruc- tion of HSR, renhancing the understanding of geotechnical challenges along the alignment and providing essential guidance for the selection of appropriate construction solutions. This contribution supports project optimization with a strong emphasis on safety and operational efficiency.
The development of the high-speed railway (HSR) in Portugal poses significant geote- chnical challenges, as the alignment crosses various geological formations with different me- chanical properties. In this context, the stability of the infrastructure is closely related to ground conditions and ground–structure interaction. Given the demanding performance and safety requirements, particularly due to the high operating speeds of the trains—it is essential to ensure that the ground can adequately withstand dynamic loads and vibrations while main- taining long-term stability. These challenges are amplified by the lithological diversity found along the route, which include alluvial zones, some with soft soils, karstified carbonate rock mass, and other conditions that directly affect both construction and operation of the railway, potentially compromising its efficiency and safety. The proposed solution relies on a detailed geotechnical study of the ground carried out in the Soure and Carregado section, part of Phase 2, Lot C, of the Porto–Lisbon HSR. Based on the site investigation campaign and its various components, this study develops a comprehen- sice analysis and interpretation of the acquired data, serving as a fundamental tool for identi- fying the most suitable solutions for infrastructure development. It applies state-of-the-art methods and geological engineering knowledge, with special focus on geotechnical aspects that directly impact the project feasibility. The findings of this dissertation will provide a valuable insights for the future comstruc- tion of HSR, renhancing the understanding of geotechnical challenges along the alignment and providing essential guidance for the selection of appropriate construction solutions. This contribution supports project optimization with a strong emphasis on safety and operational efficiency.
Descrição
Palavras-chave
Ferrovia alta velocidade estudo geológico-geotécnico prospeção e ensaios
