Hospitalet La Torrassa Tunnel

Name and location
High Speed Railway Tunnel Hospitalet – La Torrassa in L’Hospitalet de Llobregat, Barcelona, Spain
High Speed Railway Line Madrid-Zaragoza-Barcelona-French border.

Key features
Total Length: 2800 m.
Width: 11 m
Depth: Up to 15 m
Materials: Reinforced concrete diaphragm walls, slabs, vaults and counter-vaults.
Construction: Cut and cover tunneling method.

Railway Infrastructure Administrator, ADIF.


BT Intervention
Construction project for the UTE HOSPITALET, technical assistance and engineering construction work.

General information
Construction pictures

General information

The tunnel corresponding to the Hospitalet – La Torrassa Section of the High Speed Train Linea connecting Madrid – Barcelona – French Border is one of the access tunnels to Barcelona, already inside the urban area, close to the Sants Station. It is located in the village of L’Hospitalet de Llobregat.

It is a tunnel 2800 m long, which runs under the Vilanova Avenue, crossing important roadways such as Gran Via, Carrilet Avenue or Carretera del Mig, and the FGC subway tunnel.

The construction procedure is the cut and cover tunneling method. The diaphragm walls were partly constructed using a clamshell bucket equipment and partially with hydromill. Te cover is, partly a flat slab cast in situ and partly a vault, both reinforced concrete, depending on the depth of soil over it. The tunnel is closed by a counter-vault in order to resist water pressure.

Geologically, it is located in the limit of the Llobregat river delta formation and the Barcelona plain. Thus, the soil is basically sand with some silty-sand layers and a phreatic level 2 m under the surface. It was necessary to dewater the soil inside the enclosure.

Depending on the depth of the tunnel, variable due to the obstacles (roadways and tunnels) to run underneath, it was necessary to use struts to stabilize the tunnel during construction, or to use the cover slab as a strut. Sometimes tie backs were also used.


Hospitalet La Torrassa 1

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Hospitalet La Torrassa 2

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Construction pictures