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Galleries

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Galleries

Small section tunnels for hydraulics works, industrial installations, access cannons to underground stations, dual tube tunnels connections, emergency galleries in long railway or road tunnels, in ventilation systems etc.

This type of work requires specific machinery, above all in earth removal, as the narrow section considerably hampers machinery manoeuvring.

Nortúnel has great experience in the use of LHD machines (loaders – transporters) and ITC machines.

Related projects

Aduna Tunnel. New Railway Network in the Basque Country. Section: Zizurkil-Andoain

The length of the Aduna Tunnel is 4690 m. Nortúnel excavated from the mouth on the Andoain side a mine tunnel with a length of 1479 m, with an excavation […]

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.

Buciero Tunnel. Santoña – Laredo – Colindres Collector.

A tunnel 1500 m in length and with a 16 m² section to install a collector. Excavated using blasting and mechanical means on highly karstified limestone.

Rigoitia tunnel shaft

Operation system of the quarry with a tunnel of 45 m² section and 87 m in length, which feeds to a 4 m diameter and 140 m depth shaft with […]

Nafarrondo quarry tunnel shaft system.

Innovative system in operation of quarries to eliminate waste of blasting materials on the front part of the quarry. It prevents the formation of dust and reduces the generation of […]