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PROJECTS
Construction of BESKYD TUNNEL

Construction of BESKYD TUNNEL

Major construction volumes

Tunnel length (including portals) ............................................. 1822 m

Tunnel length ....................................................................... 1764.5 m

Number of railway beds .............................................. 2 (double-track)

Face square (output) in the construction.....................................120 m2

Total amount of concrete, including ...................................... 81 872 m3

- Shotcrete (sprayed) concrete (primary tunnel lining) ............. 33 224 m3

- Concrete (secondary tunnel lining)..........................................48 648 m3

Total number of reinforcement, including................................ 7171 tons

- Arches (primary tunnel lining)................................................... 2405 tons

- Reinforcement cages (secondary tunnel lining). ................................ 4766 tons

Tunnel excavation is carried out in two ledges; at first excavation is conducted at upper ledge (calotte) for the entire length of the tunnel, then excavation of the lower ledge.

In tunneling, the following methods of work are used:

  •   in the cut-in area and in the area of significantly cracked rocks – excavation by excavator with a hydraulic hammer;
  •   in the main section of the tunnel - drilling and blasting method (for hard rock) and using the tunnel boring machine (for medium strength rocks).

 Tunneling technology provides maximum mechanization and automation of labor-intensive processes of the mountain massif excavation and arrangement of temporary lining.

For anchor lining, Sandvik drilling rig capable of performing multiple operations is used: drilling holes, setting anchors and installation of reinforcing arches and frames for temporary lining. Application of shotcrete temporary lining to the excavated surfaces is performed with Sika unit on pneumatic tires. Modular permanent tunnel lining is made using a mobile metal formwork. Delivery of concrete is performed with mixer trucks in the tunnel. Its laying behind the formwork is made with concrete pump CIFA

 

 
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