Connection of roads AS-18 and AS-18a (Lugones, Asturias)

Works consist on the construction of a road link between Motorway AS-II Oviedo – Gijon (formerly know as AS-18) and road AS-266 (Formerly known as AS-18a) in the south end of Lugones.

The typology of the connection is like a “trunk” with two direct roads for Oviedo – Lugones and Lugones – Gijon directions. The connection has a double lane and a roundabout over AS-266 road.

Main features of the works are detailed next:

• Section: Transversal section type of the highway’s segment between the roundabout and the branches is made of two way roads with two 3.50 m lanes in each one, with outer edges of 2.5 m and 1m inner edge.

• Road Surface: Section used for road trunk in the highway consists on 25 cm of bituminous layer and 25 cm of crushed gravel.

• Structures: For the underpass below the railway and overpass on Nora River there are four previous structures from an unfinished work that will be used in the present project. Two new structures are also required to be constructed: A concrete frame to cross a path and a beam-slab bridge to cross the railway.

• Frame: (E-1) It has a 6.5 m horizontal gauge and 5.30 vertical one. Its length is of 14.75m.

• Bridge: (E-2) It has a 18.03 m span, 9.36 m width and 65 cm edge.

• Walls: Reinforced concrete retaining wall has been projected in the roundabout zone.

• Drainage: A special feature of the work is the construction of a pipe jacking below the railway embankment for the drainage and pumping of rain water during periods of rising level in Nora River.

• Remaining works: Signalling, beaconing and safeguarding, remedial measures on the environmental impact, such as the installation of acoustic screens, replacement of services, both in urban area of AS-266 and AS-II connection, as well as the urbanization of the AS-266 urban area.

Services provided:

• Technical Assistance
• Control and Survey
• Health and Safety coordination
• Quality Control