The rig is made up of a wagon with telescopic legs, motorised wheels and modular centrings.
 

The rig moves into the spot where the bypass is to be made thanks to a radio control and hydraulic technology on board, it extends the centring and makes it adhere to the intrados of the tunnel sections (previously positioned).
 

After the temporary steel reinforcement and the sections have been linked, the rig allows to hold into position those sections that are not concerned by the excavation of the bypass.

These self-launching equipments are for the concrete casting of next sections for construction decks with high spans or for those works where the height of the pillar does not allow the use of different building typologies, distances between 80 and 170 meters with broad bends, while for distances higher than and equal to 600/700 meters it is possibile to use a stay cable system.

The equipment is mainly made up of two support structures, anchored to the deck symmetrically to the axis of the pillar, to which the wing, bottom and inner frames of formworks are linked.

Machines moving operations always happen thanks to hydraulic systems and, where necessary, also radio control.

Equipment for the prefabrication of segments that takes place separately from the launching zone.

The segments are transported with special trailers and positioned.

Big trailers are special machines that work both as overhead cranes for the storage of prefab segments, and as for carrying the segments to the construction site for their positioning with launching facility.

This equipment is especially suitable for low-temperature places, since it allows to proceed with the artefacts storage for their next laying in less cold weather conditions.