With these words of Isaac Newton we proudly introduce you some of the bridges Ferrovial built along the world. The bridge is a very unique structure: sure you know its utility, but have you ever wondered how they are able to stand? there isn’t a unique answer. Here are some of the solutions that Ferrovial has applied in the implementation of these projects:
EXTRADOSED BIDGE IN KWIDZYN (POLONIA)
Built for the General Directorate for National Roads and Motorways in Kwidzyn, in northern Poland, this structure is a cross between a cable-stayed bridge and a pre-stressed girder bridge. Ranging from 130 to 204 metres in height, the bridge is 808 metres long.
The construction of this bridge is a pioneer experience in the country. There are only comparable examples in Japan and Switzerland. The project was awarded in the ‘Wolff Bridge Maximillian Constest‘ called by the engineering magazine Mosty, which recognizes the best and most innovative engineering solutions implemented in Poland.
EXTRADOSED BRIDGE OVER THE RIVER ERNE (IRELAND)
This bridge is part of the project to upgrade the N3 road as it passes through County Cavan. It is the first extradosed bridge in Ireland.
Invented by French engineer Jacques Mathivat in 1988, extradosed bridges are structures in which the prestressing cables protrude from the upper side of the deck and are anchored to a low tower in order to gain in eccentricity and be more effective.
The bridge over the River Erne uses voided fish-bellied concrete slabs 17.1 metres wide, and two pairs of 16 metre high concrete pylons to which the four stays are attached at different heights using structures called saddles. The saddles use friction to anchor the stays and prevent them from sliding.
This bridge was recognised at the 2014 Irish Concrete Society Awards in the Infrastructure category.
NIPIGON RIVER BRIDGE (CANADA)
The bridge over the Nipigon River will be the first cable-stayed bridge in Ontario province. It will cross over highways 11 and 17, which are part of the Trans-Canada Highway connecting Canada’s ten provinces.
The bridge, which is 252 metres long, carries four lanes of traffic. The design involves a three-tower centre pier that anchors the cables connected to the lateral pillars. This eliminates the need to install structures in the river.
Construction commenced in July 2013 and is expected to conclude in 2017.
MONASTERY ROAD BRIGE (DUBLIN, IRLANDA)
This is an arch bridge made of steel and concrete on the M50, Dublin’s main ring road. The deck is 20 metres wide (2 lanes for vehicles, 2 for bicycles and 2 for pedestrians on the cantilever edge).
The arches are vertical. The deck and arches are connected by 8 suspenders, 6.68 metres apart. The bridge is supported by four piles with a diameter of 1.5 metres and a length of 25 (north abutment) to 35 metres (south abutment).