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FCC Construcción completes boring of the Bolaños tunnel on the Madrid-Galicia high-speed line

21/12/2016

FCC Construcción completes boring of the Bolaños tunnel on the Madrid-Galicia high-speed line

FCC Construcción has completed the boring of the Bolaños tunnels (Verín-Ourense). The works entail the execution of two parallel single-track tunnels, each 6.7 kilometres long, on the Madrid-Galicia High-Speed Line.
FCC Construcción completes boring of the Bolaños tunnel on the Madrid-Galicia high-speed line

With an average excavation performance of 19.40 linear metres per day in the first tunnel, the work took 11.5 months to complete. The boring of the second tunnel saw an average excavation performance of 24.32 linear metres per day, resulting in a completion term of 9.5 months. Therefore, there was a two month reduction with regards to the time invested in the first tunnel.

An R&D&I solution was implemented in the construction of the tunnels based on applying a stabilisation system for land of high geological instability. The excavation diameter is 9,900 mm and the useful cross-section 60.27 m². The tunnel was lined using precast segments that are 370 mm thick and 1,600 mm long.  The machine used for the excavation was a single shield tunnel boring machine manufactured by Herrenknecht in Germany.

According to the CEO of the FCC Group, Carlos M. Jarque, “FCC Construcción has built up extensive experience and technical knowledge in transport infrastructure that has increased the company's competitiveness and internationalisation in the rail sector”.

FCC Construcción has built over 99 kilometres of AVE in Galicia, undertaking unique projects such as the Bolaños Tunnel or the Vigo-Das Maceiras Tunnel with a length of 8.5 kilometres.

See video of Bolaños Tunnel