THE PROJECT

The new “Per Genova” bridge will be a fundamental junction for road connections and transport in Genoa, Liguria and Italy.

A “urban bridge” that crosses the man-made area of Val Polcevera: these condition has influenced the design, making it attentive not only to the infrastructure itself, but also to the strong relationship with the surrounding context.

The new bridge will have to be simple and parsimonious, but not trivial. It will look like a ship moored in the valley; a light and bright steel bridge. It will reflect the sunlight during the day and absorb solar energy to return it at night. It will be a sober bridge, respecting the character of the Genoese.

Renzo Piano

1,067

METERS, the length of the continuous steel deck of the bridge

18

number of elliptical PIERS made of reinforced concrete

19

number of SPANS in the continuous steel deck

Description

The new bridge will have a continuous steel deck measuring 1067 metres totally, with 19 spans, divided as follows:

14 spans
of steel-concrete, measuring 50 metres


3 spans
of steel-concrete, measuring 100 metres
1 span
in steel-concrete measuring 40.9 metres near the Eastern side
1 span
in steel-concrete measuring 26.27 metres near the Eastern side
 

The bridge will be supported by 18 elliptical-section, constant-shape reinforced concrete Piers.

The external dimensions of the Piers (9.50 x 4.00 metres) are the same for both the 50 and 100 metre spans, in order to guarantee the uniformity of the perspective of the work and the speed of construction, thanks to the use of a single type of external formwork.

The geometry of the ellipse, with no sharp corners, allows the light to “slide” on the surface, therefore mitigating the visual impact and the presence in the urban context of the new Piers.

The articulation of the Piers is the result of an architectural choice aimed at using more frequent but slim elements that will fit better into the urban fabric.

The deck, made of a mixed steel-concrete structure, will lay on these Piers.The steel part of the deck will be made up of three transversal segments, so as to make the construction and assembly of several spans in sequence simple and quick. The internal structure, composed of steel diaphragms, will allow the optimization of the performance of the materials themselves, in relation to both the speed of construction and the assembly of the parts. The deck will be completed by the slab, made with prefabricated elements in reinforced concrete and subsequent finishing casting.

The shape of the deck will recall the hull of a ship, and the gradual reduction of the section towards the ends of the bridge will attenuate the visual impact. The use of a light colour for the painting of the steel elements will make the bridge bright, harmonising its presence within the landscape.

THE NUMBERS OF THE MAIN DECK

80,000

excavations
9,000
tonnes
steel reinforcement
67,000

concrete
15,000
tonnes
steel metalwork

A SMART AND SUSTAINABLE BRIDGE

Robotic and sensor automation systems for infrastructure monitoring and maintenance.

Special dehumidification system to avoid the formation of salt condensation and to limit corrosion damage.

Low environmental impact thanks to photovoltaic panels, which will produce the energy required for the operation of the bridge’s own systems (lighting, sensors, systems) both at night and during the day.

Creation of a database that can be studied and monitored constantly, and be used as a basis for the future design of infrastructures of the same type.