26 / 84
of the Railways of
the Generalitat de
Catalunya in Terrassa,
the most important
public works
executed in the city
The work consisted of a 4.5 km extension
of a double tunnel, the construction of
three new stations (Vallparadís Universitat,
Terrassa Estació Nord and Terrassa
Nacions Unides), a train depot, and three
emergency exits.
It is one of the most important public works
in Terrassa’s history and also one with the
greatest archaeological value. Remains of
human presence, dating back one million
years were discovered during the execution
of the project.
The project
The project contemplates the construction
of two tunnels with eight transversal
galleries from the Terrassa Rambla Station
to the northern part of the city, from Pozo
de Can Roca to Rambla Égara.
The tunnels, with circular sections and built
in parallel, are 6 metres in diameter in their
interior and 4.5 metres long and lined with
30 centimetres thick concrete segments.
This underground engineering work was
executed in a densely populated urban
Extension of Line S1
Terrassa
Cataluña
area and, accordingly, it was necessary
to be particularly careful in order to
minimise the impact in the city. The terrain
where the project was built is varied,
comprising mostly clay, with intercalated
parts containing sand and gravel. FCC
Construcción, however, was successful in
tackling this major challenge.
Innovation
Line S1 of Ferrocarriles de la Generalitat,
marked the first time that FCC Construcción
executed the assembly of the railway lines
on top of floating slabs which provides
greater comfort by reducing vibrations and
noise when the trains are circulating. The
segments lining the tunnel were made using
prefabricated, 30 centimetres thick fibre
concrete. An R+D report was prepared in
this respect.
Job creation
Since the project kicked-off in October
2003 until the line was commissioned in
July 2015, more than 1000 professionals
have worked in the execution of this project,
peaking between 800 and 900 employees
during the tunnel execution phase.