Case Study

Historic building under renovation in Verona (VR)

Consolidation of foundation plinths with Kerastable® high-density resin injections and subsequent infusion of MP60 pressure micropiles

Structure: Historic civil dwelling building under renovation, located in the Municipality of Verona, Via Cappello consisting of five above-ground floors and one basement with load-bearing structure in reinforced concrete pillars of different sizes and floors to be made of girders and corrugated metal sheets.
Foundations: reinforced concrete plinths of various sizes: plinth 1 4.20×1.70 plinth 2 2.90×2.20 plinth 3 2.65×2.00 plinth 4 1.80×2.35, plinth 5 2.35×2.20.
Disturbance: not present, required in preventive consolidation in consideration of increased loads (building rebuilding).
Soil: detected layers of gravelly soil at a depth of about 4 meters from the foundation plinths’ laying surface.

Il Progetto

Intervention: consolidation of No. 5 foundation plinths by performing injections of Kerastable® high-density resins (HDR type) and subsequent insertion of 31 Lift Pile®, MP60 pressure micropiles with adjustable preloading device.
Quantity of resin used: about 230 kilograms of product injected under the foundation plinths
Lift obtained from the performed intervention: 1-2 millimeters
Average depth reached by the micropiles with respect to the foundation laying surface: 6 meters
Average infusion pressure: 240bar corresponding to 24 tons
Duration of the consolidation intervention: 4.5 days
Number of site operators: 3