As part of the preparatory site works for new building lots, an existing retaining wall had to be strengthened in order to enable the continuation of the excavation. By using special compact equipment, combined with a specialized scaffolding assembly enabling construction at height, we succeeded in drilling a series of 6m deep rock bolts into the existing wall. A network of cables and reinforced steel mesh, imported and marketed by our company, was spread over the rows of bolts in order to complete the reinforcement.