As part of the geotechnical study, Maccaferri provided technical support to the design office, particularly for the design of retaining structures, rockfall protection, and slope stabilization. This collaboration made it possible to define high-performance solutions, such as the Terramesh® Green system and ParaGrid® geogrids, fully aligned with the site’s geotechnical and hydraulic constraints, for the reconstruction of the road using reinforced embankments.

As the Terramesh® Green system is installed directly within the riverbed, the toe of the embankment is protected by rock riprap, which limits scour caused by river erosion. In addition, an RB 100/UAF rockfall barrier was installed upstream of the new road to provide protection against rockfall events with energies of up to 100 kJ, which may be triggered during heavy rainfall episodes.

Below this rockfall barrier, the slope overlooking the road was stabilized using a soil nailing system combined with a flexible facing, specifically MacArmour® 30×30 BIO. The reinforced mesh features a ZnAl alloy coating (GalMac® C2) and is factory-coupled with a coconut fiber biomat, reducing slope erosion.

The Terramesh® and MacArmour® solutions, with their polymer (PoliMac®) and ZnAl alloy (GalMac® C2) coatings, fully meet the project requirements, particularly in terms of durability, thereby ensuring long-lasting and reliable protection of the infrastructure.