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Concrete Arch Enters Record Books

Tuesday, August 18, 2015

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The third longest concrete arch bridge in the world has sprung into existence, as the span of the Almonte Viaduct reaches closure.

As reported by Bridge Design & Engineering, the arch of the Almonte Viaduct, built for the high-speed rail system in Spain is itself the longest span on a single-arch concrete bridge used for high-speed trains.

Drone footage of the construction of the bridge reveals the scope of the build.

The Almonte Viaduct, built for the high-speed rail system in Spain, boasts the longest span on a single-arch concrete bridge used for high-speed trains.

A temporary system of stay cables was installed during the concreting of the arch segments, according to BBR. Eight groups—four for pulling and four for retaining operations—were assembled on the ground and lifted into position by cranes.

Before the segments of the arch were concreted, the stay cables were stressed in a synchronized sequence, applying force to the pulling and retaining cables at the same time.

The bridge includes 23 sections in total, 21 of which are 45 meters long at the external parts of the arch and a span of 42 meters in the area that is supported on top of the arch. The two end spans stretch to 36 meters in length.

Eight pillars on top of the arch support the deck, shifting the load and force from the track to the arch.

There are a total of 14 pillars at the accessways: six on the north side and eight on the south end of the viaduct, all of which vary in height, with one reaching a total of 65 meters.

Setting Records

Arenas & Asociados, the primary contractor, indicated that the 384-meter concrete arch is part of the main section of the 996-meter long, 36-meter tall bridge.

The single-arch concrete span surpasses the 336-meter meter span of the Dashegguan Bridge in China and the 270-meter long bridge of Lake Froschgrun in Germany, both railway bridges.

When compared to non-railway concrete arch bridges, it falls behind the 390-meter bridge between Sveti Marko and Krk islands in Croatia and the 420-meter Wanxian Bridge in China.

The railway bridge is part of a US $110 million project for state-owned Spanish railway infrastructure administrator Adif, under the Ministry of Development, that encompasses three other bridges, now complete, southwest of Madrid.

The bridge was designed by Arenas & Asociados and Idom, and built under a joint venture between FCC Construccion and Conduril; FCC Technical Services provided detailed design and construction process design works.

FCC indicated their work will now focus on constructing the top tableau that will hold the twin high-speed rail lines and other elements required for the modern rail link.


Tagged categories: Asia Pacific; Bridges; Concrete; EMEA (Europe, Middle East and Africa); Latin America; North America; Program/Project Management

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