Contracting authority: Cabildo of Tenerife

The main objective of the remodelling project of the new access branch from the TF-24 is to alleviate traffic on the junction between the access roads from the TF-24, towards La Laguna (La Esperanza road), and the TF-5, towards Santa Cruz de Tenerife (known as Padre Anchieta). The action is carried out by remodelling a direct branch, for the movement of which a false tunnel is undertaken through the excavation of 50,000 m³. . In the construction of the TF-24 branch, a reinforced concrete wall was built with 4,300 m³ of HA-30 and 270 Tn of steel. Micropile curtains were built definitively, replacing the concrete walls in those areas that geotechnically required this type of stabilisation. This screen was developed by installing 6,900 ml of 250 mm diameter micropiles, spaced 0.5 m apart, embedded in the natural ground and incorporating a cement grout and tubular steel reinforcement with an outer diameter of 168.3 mm and a thickness of 9 mm.

Excavation of the false tunnel of the TF-24 branch line

The remodelling of the new access branch from the TF-24 also contemplates the subway excavation under the slab of the cut-and-cover tunnel to open the TF-263 to traffic. This has been done by incorporating two micropile curtains (one in each gable), crowned by a load-bearing beam on which a 90 cm thick reinforced concrete slab supports a bracing reinforced concrete slab. For the lighting, 3,000 watts of L.E.D. luminaires have been installed, reducing consumption and increasing efficiency.