External formwork without dywidag bars

This type of formwork is suitable for artificial tunnels, where there is no tunnel dug in the mountain.

The photo alongside shows a solution without dywidag tie rods between the internal formwork and the external formwork.

This type of external formwork guarantees a very high speed of armoring and stripping of the formwork, since the construction site does not waste time fixing the bars between the internal and external formwork.