After completion of verification nail testing and waiting for the proper soil nail materials to be delivered, Teichert Construction began installation of production nails at the Soil Nail Wall 4. The results of verification nail testing confirmed the appropriate soil nail lengths as well as allowed for a redesign of the nail layout for ease of construction. Six inch diameter holes are drilled into the hillside to design lengths prior to installation of the actual steel nail. Grouting of the nail must take place immediately after drilling to prevent cave-ins. Wire mesh and steel reinforcement are then installed along the soil cut face prior to the installation of the shotcrete wall facing.
Installed soil nails along with the Soil Nail Wall 4 cut face extend outward. The black geocomposite drain strips are installed against the soil and will be extended down as each soil nail lift is excavated.
Reinforcing steel bars extend above the cut face to eventually support the extension of a concrete cantilever wall.
Shotcrete installation operation at Soil Nail Wall 4.
A soil nail extends through the reinforcing steel, wire mesh, and initial layer of shotcrete.
