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FOOTBRIDGE OVER THE SEGRE RIVER, LLEIDA (SPAIN)
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FOOTBRIDGE OVER THE SEGRE RIVER
CONSTRUCTION PROJECT
Lleida, 2000-2002
Cross section.
Several images showing the finished
footbridge. The side span on the left side
fans out to create a platform that serves as a
piazza-viewpoint and as a transition to the
path alongside the river. Structurally it acts as
a counterweight for an unbalanced side
span.
With its wide span and apparent
slenderness, the design of the
footbridge, developed in collaboration
with Ravetllat & Ribas architects,
highlights aspects related to the
asymmetrical composite section that it
uses. The footbridge, understood more
as an itinerary than a place to stop, is
intended to be a link between the two
banks instead of a limit for people on
foot. The design was a finalist in the
2004 FAD Architecture Awards, within
the “Open Spaces” section.
It accepts the structural challenge of
having only 2 piers and a central span of
83 m that fosters the impression that it is
suspended over the river. The Z-shaped
cross-section converts the footbridge
into a platform free of visual obstacles or
artificial landscapes created by its own
structure. The total thickness, divided
between the upper and lower beams, is
largely concealed, thus contributing to
the sensation of slenderness and
offering two differentiated elevations and
two ways of relating to the environment.
The geometrical configuration is the
following: a continuous lintel with a side
to side width of 5.4 m and a length of
144 m, with a central span of 83 m and
two side spans of 32 and 29 m.
The cross-section consists of 2 box
girders tied by transverse steel girders
and a structural concrete slab of 15 cm,
which is raised 1.15 m, partially
concealing the 2 m thickness of the
lower box. The upper beam, with a
maximum thickness of 1.75 m and a
slight outward lean, rises 1.20 m above
the level of the deck, acting as a fascia.
The two central piers are resolved using
slender walls of 4.40 x 0.80 m with pile
foundations.