Commercial Foundations Case Studies: Wall Shoring in SIlverlake Area of Los Angeles
A geo-specialty contractor called Saber in to stabilize a shearing wall for a home in the Silver Lake area of Los Angeles. The wall was constructed to keep the soil of the hillside home intact and to provide a barrier between the hillside and a newly constructed garage that would include a rooftop terrace.
The contractor constructed the wall using seven 30’ vertical shoring piles driven 22 feet into the soil, and lagging timber.
The challenge was to provide a solution that would permanently stabilize the wall and hillside behind it.
Saber recommended the utilization of 14 HA 150 galvanized helical anchors with 6” and 8” helix blade diameters for the project. Saber installed the helicals with a 1-foot offset from the shoring piles. The crew installed two rows of tiebacks to whalers that were welded onto the shoring piles. They were installed to a depth of 10 feet at 6,700 pounds of torque. Finally, Saber performed a load-bearing tension test to ensure design performance to meet structural requirements.
Structural Engineer: Jack Yeh Structural Engineers
Products Installed: 14 x HA 150 helical anchors (galvanized); 14 x all thread rods (1" x 48"); 14 x wall plate adaptor assemblies; 14 x HA 150 5' lead, 6" 8"; and 14 x HA 150 5' extension
Making way for the new wall and garage.
Helicals being installed.
Helical anchors get a load-bearing tension test.
The retaining wall is permanently stabilized.