TUNNEL "TUHOBIĆ" ZAGREB - RIJEKA HIGHWAY

BASIC CHARACTERISTICS OF THE TUNNEL (LEFT TUBE), SECTION OŠTROVICA – VRATA
CLIENT:ARZ d.d.
CONTRACTORS:
Consortium:
VIADUKT d.d. ZAGREB,
HIDROELEKTRA, NISKOGRADNJA d.d.


  • Total length of the tunnel: 2141 m
  • Excavation performed by VIADUKT: 1120 m
  • Cross-section of the excavation: 75 - 85 m2
  • MMethod of excavation: NATM, drilling + shot firing
  • Excavation category according to RMR classification: II-V
  • Viadukt d.d. constructed the eastern side of the tunnel. The tunnel was excavated in limestone rock and dolomites with several large caverns partially filled with non-consolidated rock blocks and earth. The category of the rock mass strength often changes.