10 MW to power TBM for high-speed railway construction
UTE forming Acciona y Cyes Infraestructuras (Acciona and Cyes Infrastructure) has provided a TBM (tunnel boring machine) for the construction of the high-speed railway in the Ourense mountains, Spain.
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UTE forming Acciona y Cyes Infraestructuras (Acciona and Cyes Infrastructure) has provided a TBM (tunnel boring machine) for the construction of the high-speed railway in the Ourense mountains, Spain.
The preparations for the positioning of the TBM within the tunnel Bolaños, which is 6,800 metres long, started two weeks ago.
German-made TBM2 Herrenknecht AG tunnels at an average of 23.8 metres per day, leaving the outer ring of 9.50 metres in diameter and a 8.50 metre diameter inside the tunnel. But the progress depends on the characteristics of the soil, and if the machine manages to tunnel an average of 18 metres per day, the tunnel would be completed in about a year.
The powering of the TBM is the most innovative with ten 800 to 2,000 kW generators and four lifting transformers, reaching 10 MW to power the entire process (TBM requires 6.15 MW). This involves two 15,000 l and three 5,000 l tanks of diesel to fuel the generators.
Once the work is complete, it is likely that the TBM will tunnel the other side of Bolaños which will be just 20 metres shorter. This has been awarded to UTE Fomento de Construcciones y Contratas and Ventas Llorente.
Source: elCorreoGallego.es
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