Construction project for the platform of the Antequera–Granada High‑Speed Line. Section: Loja Bypass – Genil Valley.
The purpose of the project is the design of a complete infrastructure suitable for supporting a railway superstructure allowing operation at a maximum speed of 250 km/h. The project encompasses all necessary works: earthworks, viaducts, tunnels, overpasses and underpasses, wildlife crossings, transverse and longitudinal drainage works, relocation of utilities, railway diversions, resolution of impacts on public services, ancillary works, site installations, and the design of environmental mitigation measures.
The section begins at chainage P.K. 399+880 of the Loja Bypass platform project, strongly conditioned by the previous section in order to avoid impacts on the Cortijo de la Viña and the Santa Rosalía archaeological site, also diverting the alignment away from Red Eléctrica towers to facilitate their relocation and execution during the works.
In profile, this area is conditioned by the elevation and gradient of 7.497‰ from the previous section, after which the alignment crosses over O.D.-400.74 and continues towards the Arroyo Salar viaduct.
The viaduct over the Arroyo Salar is a structure with a total length of 693.00 m, with a span distribution of 44 + 9×55 + 48.25 + 60 + 45.75 m. It is constructed span by span using a self‑launching formwork system, designed to span both the Arroyo Salar and the A‑4155 road. The geometric layout of the piers was conditioned by archaeological remains discovered during the project phase, associated with the BIC Villa Romana de Salar, whose most significant remains are located approximately 650 m from the alignment.
Between the Arroyo Salar valley and the Genil valley, the alignment crosses the Cerro de Limones through a mined tunnel 1,060 m long, with a maximum overburden of 70 m and a minimum of 18 m beneath a small valley at chainage P.K. 402+990. Notably, the construction process requires the sequential execution of reinforced lining as excavation progresses.
At the exit of the Cerro de Limones tunnel, the alignment crosses over the A‑92 motorway via a viaduct 794 m long, with spans of 43+65+49+11×40+56+85+56 m, also crossing the Genil valley and the Genil River.
After the Genil River viaduct, the alignment approaches a peri‑urban area within the municipality of Huétor‑Tájar, where it finally connects with the existing platform of the Antequera–Granada line, currently consisting of a single electrified track.
