924,63m
length
INDUSTRY, INNOVATION AND INFRASTRUCTURE
Build resilient infrastructure, promote sustainable industrialization and foster innovation
Economic growth, social advancement and action against the climate emergency depend largely on investment in infrastructure, sustainable industrial development and technological progress. Today, about 1 billion people live more than 2 km from a roadway, 940 million live without electricity, and 663 million lack improved drinking water sources.
ACCIONA participates in the entire infrastructure construction value chain, from the identification of opportunity, design and execution, to the operation and maintenance of the constructed works, using the most advanced and innovative techniques.
Performance quality and safety are two of the criteria that maximize the company's value proposal in the development of large infrastructure projects and that differentiate it from other competitors in the construction field.
The Ízbor-Vélez de Benaudalla section of the Sierra Nevada Highway (A-44) runs through the province of Granada. This is a newly laid highway section measuring 10 km long, with six viaducts of different types, which together make up a total of 2,700 m in length and 5 million m3 of excavation.
The route passes through geotechnically complex terrain, where there are many active landslides which have made it necessary to carry out a whole range of geotechnical stabilization measures; it also has a very rugged topography, making it necessary to build six viaducts of different kinds, adapted in each case to the features of the terrain.
The viaduct consists of a single deck 24.00 m wide and 924.63 m long, divided into fifteen spans with the following lengths: 65.00 + 140.00 + 65.00 + 65.00 + 11x55.00 + 49.63 m.
In the first three spans, the section is a post-tensioned concrete box with a depth of 8.00 m at the support of the piers and 3.20 m in the centre of the span, with 8.00 m long prefabricated concrete javelins. In the 55.00 m spans, the depth is a constant 3.20 m.
The Ízbor viaduct has foundations at the bottom of the valley, avoiding the slopes on both sides, where there are large-scale landslides. The maximum height of the pier shafts is 70.80 metres.
The first three spans were built by means of successive cantilevers, and the rest by means of self-supporting shoring.
GENERAL INFORMATION
- Location: Granada, Spain.
- Contract type: Construction.
- Infrastructure: Viaduct 924.63 metres long, with a 24 m wide deck and piers up to 70 metres high.
- Year of project completion: 2008