Special tunnel formwork
In situ concrete loadbearing masonry system
The CONDOR formwork system for casting natural circular tunnels is made up of a structure with OMNI steel beams, allowing the passage of site vehicles and representing the supporting steel structure to which the formwork is connected. The formwork is made
of: OMNI UPN 120 profiles, SH20 wooden beams, 3-ply wooden shapes and birch plywood with phenolic coating. It includes all accessories,
such as work platforms, walking decks, stairs, all complying with strictest safety standards. The formwork includes useful accessories, such as casting docks with fast connection to the concrete pump and inspection windows to check the filling of the concrete inside the formwork. The concrete wall vibration system allows to cost a very high quality finished surface. Once the whole structure is lowered with a hydraulic system and the inferior lateral panel are stripped, the cart moves forward through wheels rolling on common tracks, by towing with means already available in the site. The system has a significant versatility, thanks to OMNI structure’s features allowing by simple and fully reversible modifications, adaptation to widening compared with current sections, due to lay-bys, large chambers, emergency niches and accesses with sloping portals. The shift to the casting of artificial tunnels occurs by simply adding the external formwork. CONDOR pays careful attention to services offered to the client, such as dedicated design, pre-assembly of modules in the warehouse in order to ensure perfect curve cut of shapes and joint sealing, on-site technical support in any phase, on-site training and information workshops for the staff.