Barragem do Alto Lindoso


A barragem do Alto Lindoso, é considerada a maior central de produção de energia hidroeléctrica e uma das mais altas construções de Portugal. Esta encontra-se em funcionamento desde 1993, localizada no rio Lima, a escassas centenas de metros da fronteira com Espanha, onde se situa grande parte da bacia hidrográfica do aproveitamento. 

Esta barragem é do tipo arco-abóbada com uma cota de coroamento de 339 metros e comprimento de 297 metros. A altura acima da fundação de granito é de 110 metros. A central encontra-se dividida por andares onde o último andar está situado a 350 metros de profundidade do edifício de comandos da subestação com ligação à rede de 18/400 kV. O seu elevador na altura da construção era o mais rápido da Europa e o segundo do Mundo, sendo apenas ultrapassado pelo CN Tower em Toronto, Canadá.

A característica mais relevante do aproveitamento do Alto Lindoso é a potência dos seus dois grupos geradores de 317 MW no veio da turbina de cada grupo, facto que os torna as mais potentes unidades de produção de energia eléctrica instaladas em Portugal. Em média a sua produção anual é de 970 milhões de KWh, equivalentes ao consumo anual de 440 mil portugueses.

Central do aproveitamento hidroeléctrico do Alto Lindoso

Em 1992-1994 esta barragem foi premiada com um prémio internacional “Puente de Alcantara”, pelo seu bom desempenho. É de salientar que esta grande obra de engenharia foi inteiramente projectada por Engenheiros Portugueses.

Cerca de 17 Km a jusante localiza-se o aproveitamento de Touvedo que, para além de produção de energia, completa tambem o do Alto Lindoso, sendo crucial na regularização dos elevados caudais que este turbina (250 m³/s no conjunto dos dois grupos), evitando assim variações bruscas no caudal do rio Lima.

Números da contrução:
  • 1 200 000 m³ de escavações;
  • 600 000 m³ de betão;
  • 3 000 toneladas de aço;
  • 55 km de construção ou beneficiação de estradas principais, incluindo 11 novas pontes e viadutos;
  • 120 milhões de contos de investimento não incluindo as expropriações;
  • 10 anos em construção, de 1983 a 1993;
  • 1500 trabalhadores concentraram-se nos estaleiros, na fase mais intensa dos trabalhos.

Fotografia da construção da barragem do Alto Lindoso


Perspectiva do Aproveitamento hidroeléctrico do Alto Lindoso

[ click na imagem para aumentar a resolução ]

Para uma melhor explicação do funcionamento do circuito hidráulico entre outras curiosidades deste grandioso projecto nada melhor que a apresentação do aproveitamento pelo responsável da obra entre 1982 e 1992, o Engenheiro Rui Junqueira.






Características Técnicas do Projecto: ver AQUI

Desenhos do Projecto:
[ click na imagem para aumentar a resolução ]

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