Wadi el Kuf Bridge

32.69666666666721.565555555556Koordinaten: 32 ° 41 '48 " N, 21 ° 33' 56" E

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Wadi al - Kuf

The bridge over the Wadi al - Kuf, (Arabic جسر وادي الكوف ), is a road bridge in Libya. It is an important example of the jobs created by Riccardo Morandi prestressed concrete cable-stayed bridges. She had the maximum clear height of all bridges in Africa, until it was surpassed by the Bloukrans Bridge in South Africa 1984.

Location

The bridge is part of a road connection from Benghazi about El Merdj, Al - Baida and Darna to Tobruk and stands on the designated as AL- Orouba Road section of the road about 20 km west of al - Baida, 15 kilometers south of the coast over the deep Wadi al - Kuf in the mountains of Jabal -al- Akhdar.

Description

The bridge crosses the Wadi al - Kuf at an altitude of 172 m. It is 477 m long, its span is 282 m.

Your pylons tower over the road to 57,30 m, but they are not the same because their foundations are on the slopes of Wadi at different heights. Your made ​​of prestressed concrete A-shaped structure gives them the required stiffness to accommodate the varying lateral loads that arise when crossing the bridge moving vehicles initially the bridge deck in front of the pylon, then load the part behind him. For the same purpose the bridge deck is arranged by the between the pillars of the pylons, supported V-shaped structures.

The bridge deck is in contrast to the usual steel truss girders or steel girders, also made of prestressed concrete, and for a hollow box with a 7.40 m wide bottom flange, on which a 13 m wide plate is arranged as a road vehicle.

The inclined tensions are not made of steel wire ropes, but from pre-stressed concrete rods, whereby vibration of the ropes to avoid the claim, especially the cable connections at the pylons and the bridge deck. This oblique bars are mounted from the pylon - axis on the bridge deck at a distance of 97.5 m.

As part of the cable-stayed bridge, the bridge deck is a Gerber beam. From the pylons from collar the two halves of the bridge deck at each 16 m above the connection of the helical tension also. The remaining gap is closed by a 55 m long suspended beam.

History

The Jabal -al- Akhdar is an inaccessible cave -rich area that was the center of many years of resistance under Umar al Mukhtar against Italian colonial power. The bridge is therefore also frequently named after him. It was built a few years after the first oil discoveries in the Kingdom of Libya under King Idris in the years 1967 to 1971. The planned Riccardo Morandi Bauer artwork was created by Construzioni Stradali et Civili SA created from Lugano, a subsidiary of the Italian Cogefar, which later became the Impregilo.

In 1999, the bridge was overhauled after ground movements had affected their average margin. Here, the pink paint was changed to a light gray.