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    Hernialde Zizurkil Railway

    Track Bed of the New Basque Country Railway Network. Section: Hernialde Zizurkil

    Track Bed of the New Basque Country Railway Network. Section: Hernialde Zizurkil

    Location:

    Guipúzcoa. Basque Country. Spain

    Acciona’s Role:

    • Construction

    Infrastructure:

    Railway track bed L=5,870 m for 250Km/h. Double track, international gauge (1,435 mm). Track bed width 14 m. Ballastless track.

    Most significant elements:

    • Viaduct over the river Hernialde: L=25 m. Post-tensioned lightweight slabs with a minimum depth at the edge of 1.60 m and a depth of 1.74 m on the slab axis. It will be constructed with full shoring, except on the section over the bed of the river Hernialde, where falsework will be used.
    • Viaduct over the river Alkiza: L=69 m (19.5+30+19.5). Post-tensioned lightweight slabs with a minimum depth at the edge of 1.65m and a depth of 1.79 m on the slab axis. It will be constructed with full shoring, except on the section over the bed of the river Alkiza, where falsework will be used.
    • Viaduct over the river Asteasu: L=404 m (34+3x49+50+3x47+32). Post-tensioned concrete box, with a maximum depth of 3.20 m. It will be constructed with a launching gantry.
    • Bored tunnels: Anoeta (L=1,370 m), Asteasu (L=2,557 m) and Zizurkil (847 m). The free cross-sections are 85 m2 para Anoeta and Asteasu, and 95 m2 for Zizurkil, although it has also been reduced to 85 m2. The vault and walls have a circular cross-section.
    • Ugarte cut-and-cover tunnel: L=268 m with a maximum overburden of approximately 13m.
    • Tunnel openings: Vaults supported on slabs, made from reinforced concrete with a variable depth created “in situ”.
    • Track slabs: Reinforced slabs measuring 9 m wide and 60 cm deep will be used as the base for the ballastless track on the open-air sections located between the cut-and-cover tunnel and the viaduct, as it is a short section.

    Completion date:

    • 2018

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