The Jablunkov tunnels were two railway tunnels through the Khablunkov Pass. Their location has always been a point of great importance as part of the connecting line between the Czech Republic and Slovakia. Their renovation was necessary due to their defective condition, so between 2007 and 2013 they were reconstructed, leaving one as a double-track tunnel and the other as an exit corridor.

This is a large project in which Caldibe manufactured a formwork in carbon steel type S-275 JR. We have extensive experience in tunnel formwork and this is a good example. It's production lasted 5 months.