Reinforced soil and fortified soil construction

The various phases of intervention

As we know, Viresco® Sator has been used for 25 years in the construction of reinforced and fortified soil. It in fact offers excellent results, even in the extreme conditions (in terms of slope, type of terrain, etc.) that this type of operation presents.

Practicality and manoeuvrability also make it advantageous during the construction phase.

All the phases are well illustrated in the following sequence: arrangement of formwork, geogrids, Viresco pre-seeded biotextile, backfilling with soil including vegetable soil, and the final result.

Virens applications

1. As can be seen, the substrate is levelled and compacted and the steel formwork is prepared as per the design instructions. It should be noted that the horizontal part and the inclined walls of the steel formwork must be connected by special steel bars anchored to them, so as to guarantee the geometricity and stability of the face, even during soil compaction.
2. The geogrids are laid horizontally along the inner face of the formwork, leaving an excess portion of geogrid folded over the outer face of the formwork.
3. Viresco pre-seeded biofelt is then applied inside the geogrid to prevent the backfill material from escaping from the face, again folding a small portion on the inside and outside.
4. The anchor bars are then positioned to fix the formwork geometry according to the planned inclination.
5. If possible, an appropriate thickness of at least 15 cm of topsoil is placed immediately inside the pre-seeded biotextile to promote germination.
6. The backfill material is spread over the front area as well as over the remaining length in 30 cm layers, and then the backfill material is compacted until a lighter manual compaction machine is used on the frontside.

With this technique, work was carried out on slopes with inclinations of up to 80° and with excellent grassing results.