SOCOTEC experts are participating in different phases of the construction process of the L9 tunnels.

Key information

Project name: Service contract for the management of the execution works of the tunnel and additional works of L9 of the Barcelona Metro. Zona Universitaria - Sagrera Meridiana section.

Date: 2021 - 2027

Clients: Infraestructures de la Generalitat de Catalunya

Location: Barcelona, Spain

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Ferran BIOSCA

L9 Works Director – SOCOTEC Spain

L9 Works Director – SOCOTEC Spain

Project summary

Line 9 is a fully automated line of the Barcelona Metro network that is currently under construction, with 24 stations open in Barcelona and El Prat de Llobregat, L'Hospitalet de Llobregat, Badalona and Santa Coloma de Gramenet suburbs, since December 2009. The line is currently divided in two branches, with a connecting segment between them yet to be built. Upon completion, it will be the longest underground metro line in Europe. The final design has a central part shared by line 9 and line 10 and at both ends both lines separate.

Project details

The section of the line 9 South of the Barcelona metro, which runs from Barcelona´s airport Terminal 1 to Zona Universitaria. The L10 south starts in the Barcelona´s harbor zone. Both lines 9 and 10 matches in the Pou de Bifurcació placed in L´Hospitalet de Llobregat. This strecht consists of 15 stations that connect with the lines 1, 3, 5, and 8 of the metro, as well as tram lines T1, T2 and T3.

SOCOTEC services provided by our spanish team

  • Project design of several stations
  • Site supervision of the new tunnel section (period 2022 – 2024) 4.2 Km forecasted
  • Tunnel BIM modulation including geological model, tunnel machine parameters and daily advance, and building monitoring along the new section of the tunnel.
  • Coordination of all the welding process and the QA of all the process in the steel structure.
  • Control in the phase of preparing metal plates and pieces.
  • Implementation of NDT in the workshop phase and work phase, performing VT, PT, MT and UT, as well as control of application and finishing of coatings.
  • Control in construction phase at the verification level of assembly and realization of END in welded joints, VT, PT, MT and UT, as well as control of application and finishing of coatings.
  • Control of temperatures in the supports and thermoplastic welding.
  • Documentary control of the entire prefabrication process.

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