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Geotechnical Works and Underground Structures

Ventilation Shaft • Reboleira, Amadora - Portugal

Lisbon Metro - Linha azul (blue line) – amadora este – reboleira and terminus

Client
Metropolitano de Lisboa (Lisbon Metro Company) / Nova Estação, ACE / CJC Engenharia Ltda.
Location
Lisbon Metro - Linha azul (blue line) – amadora este – reboleira and terminus
Design date
2010 - 2010
Construction date
2011 - 2011
Services
Preliminary study; Detailed Design; Technical Assistance to the Construction
Construction
Andrade Gutierrez EAA / Soares da Costa,S.A. / Construtora do Tâmega, S.A. / Teixeira Duarte, S.A.
Summary

The rocky nature of the site leads to the adoption of an elliptical geometry. The ventilation shaft has a depth of 47 m and a groundwater level at 7 m below the surface.

The axes of the ellipse have 18.7m and 13.2m. The concrete slab is concave (invert).

The cover and emergency exit stairs were made with totally pre-fabricated components, eliminating the need for formwork. The singularities of this project are the connection between the gallery tunnel and the ventilation tunnel (due to high pressure) and the complexity of geometry and construction.

Ventilation Shaft • Reboleira, Amadora - Portugal

Project detail

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