Owner: San Diego Gas & Electric
General Contractor: San Diego Gas & Electric
This permanent soil nail wall with a sculpted and colored shotcrete facing was designed and built by Schnabel Foundation Company. Excavation in the weathered rock was performed in 10 foot lifts to provide a bench wide enough to install the initial rows of rock nails. To stabilize the cut, Schnabel installed approximately 295 corrosion protected nails from a drill mast mounted on a skid steer loader.
The rock excavation required only light mesh and a flash coat of shotcrete for temporary support. When subgrade was reached a sculpted permanent shotcrete face was applied with a design thickness of 8 inches. Finally, a drainage swale was installed at the top of the wall.