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In civil engineering, approaches to underpasses, aqueducts, and sunken roadways often incorporate geomembrane constructions as groundwater barriers. The waterproof membrane must be installed at such a level that vertical equilibrium is maintained to prevent the construction from floating.
The installation of the geomembrane at depth can be done in two ways: through the sinking of geomembrane constructions, and the application of geomembranes in dry conditions. In both methods, Genap has years of experience and has completed a significant number of impressive projects.

By applying a synthetic layer, a waterproof barrier is created, allowing the infrastructure to be constructed in dry conditions.

In dry installation, a synthetic construction is applied for, among others, access ramps, underpasses of tunnels, aqueducts, and sunken roadways.

In the 1990s, Genap assisted with the construction of the Øresund Bridge Tunnel link. Initially, Genap was consulted for advice regarding the implementation of a geomembrane construction for the approaches to the Øresund tunnel. This eventually resulted in an order and installation of 85,000m² of our Genaseal LLDPE 2mm geomembrane.

To enhance traffic safety, Genap has created construction pits for new underpasses along the N348 between Raalte and Ommen. This intervention eliminates hazardous intersections at the Oude Twentseweg and Dalmsholterdijk, signifying a significant improvement in traffic flow.
