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Experience

List Map

N-634 Eibar Bypass Construction Project. Phase 3

Including a section of single lane highway, 2 km in length, whose main parts were: The Amaña and Katillu tunnels, 245 m and 185 m in length respectively. The Ego […]

Calatayud diversion tunnel. Hydraulic correction of the Barranco de las Pozas

Tunnel with a length of 308.91 m with an excavation section of some 23 m². The excavation took place using mechanical methods (ITC) in conglomerate and clay loam.

Line 3 Bilbao Metro. Etxebarri – Txurdinaga Section.

Completion of 2180 m of two-way tunnels on Line 3 of the Bilbao Metro between Etxebarri and Txurdinaga, with two cavern stations and the corresponding access cannons and lift shafts, […]

Vitoria – Bilbao – San Sebastián high-speed railway line platform. Section: Durango – Amorebieta/Etxano

The Durango-Amorebieta/Etxano section is from kilometre point 0+000 (connection point with the Abadiño-Durango section) and 4+600 (connection point with the Amorebieta /Etxano-Amorebieta/Etxano section), with a length of 4.6 km. The […]

Basataundi and Amiselaieta Tunnels. Belate Axis, N-121-A. Etxalar – Vera Sections.

Tunnels with a length of 446 and 305 m with an excavation section of some 135 m². Excavated via perforation and blasting slate and sandstone.

Section 8b: Larraskitu – Buia of the Bilbao Metropolitan South Link road

The section in the main has two parts: The first consists in widening to 4 lanes the A-8 both in the direction of Cantabria as well as in the direction […]

Larraskitu Tunnels. Bilbao Metropolitan South Link road

Two parallel tunnels with a length of 885 and 832 m with an excavation section of some 91 m². Excavated via perforation and blasting, applying the New Austrian Method of […]

Lamiarri and Intxaurreta Tunnels. Widening and improvement of the N-121 (Behobia – Endarlatsa)

Tunnels with a length of 487 and 105 m with an excavation section of some 100 m². Excavation took place on granite via perforation and blasting.

Section 8a: Peñascal – Larraskitu of the Bilbao Metropolitan South Link road

Construction took place on two sides of the road 10.5 m each (one each way, and a section type that had to 3.5 m carriageways (plus hard shoulders), a junction […]