In projects where land-based constructions meets the sea, challenges and obstacles to overcome during installation and construction are significantly different. In these projects, Semar is able to combine the best of their competences in structure and marine operations to offer the most suitable and efficient installation methods. Past projects have shown methods used in offshore marine operations can be scaled and adapted to improve installation of infrastructure such as bridges and tunnels. At the design stages, Semar has also been involved in hydrodynamic and mooring analyses of new floating bridge concepts.

›  Hydrostatic and hydrodynamic analyses

›  Mooring analyses

›  Structural design of grillages

›  Marine operation

›  Development and design of installation methods

The two caissons, which form the base of the 204m tall main pylons of the Øresund bridge, were transported and installed using two barges connected with space truss structures. Each of the caissons had a dry weight of 20’000 tonnes and a submerged lift weight of 12’200 tonnes. Lifting and lowering was done by strand jacks.