After excavating for the first lift of soil nails for Wall 7, Teichert Construction began the process of installing soil nails, steel reinforcement, and shotcrete to form the structural wall itself. This sequencing of work typically takes at least a week from start to finish (excavation, drilling, nail installation and grouting, steel reinforcement, and then shotcrete). County Inspection staff perform onsite inspection of the complete operation to ensure that the proper design specifications are achieved. Inspectors are responsible to verify that the contractor excavates the hillside to the surveyed limits, confirm that soil nails are installed and grouted to the designed lengths, and ensure that the proper reinforcing steel is placed and shotcrete is applied properly.
After excavation, soil nails (40 to 50 ft in length) are installed.
Geocomposite drains ("black strips") are evenly spaced along the cut face.
Prior to shotcrete facing, reinforcing steel mesh and rebar are installed.
An initial layer of shotcrete is applied to the prepared wall face.
Shotcrete is uniformed applied until the design thickness is achieved.
