The company won international tender of the European Bank for Reconstruction and Development for the construction of a double-track railway tunnel on Beskid-Skotarskoe section in the Carpathians. The tunnel is commissioned.
|Tunnel length (incl. portals)||1822 m|
|Tunnel length||1764,5 m|
|Railway lines:||2 |
|Production area:||120 sq. m|
|Total concrete amount:|| 81,872 cub. m|
|33,224 cub. m|
|48,648 cub. m|
|Fittings, total:||7 171 t|
|2 405 t|
- Fittings frameworks (second stage):
|4 766 t|
Tunnel drilling and blasting was carried ledge after ledge. At first, excavation is carried out on upper ledge (calotte) for the entire length of the tunnel, and then the lower ledge was being excavated.
When excavating calotte, temporary support of the excavation was arranged with arches with shotcrete coating. The penetration of the lower ledge was carried out with the temporary fastening anchors and shotcrete on reinforcing arches. Concreting of permanent lining was carried out using a mobile formwork.