One anchor is in place, at right with the red tape. The diagonals are temporary supports.
The owner is a local designer and the small building is her studio. She and her neighbor cooperated for this retaining wall project.
The concrete retaining wall shown in these photos was leaning forward by roughly one foot, and was in danger of failing and falling over. The wall is on the property line between two homes, and also supports a small art studio on the upper property, which was in danger should the wall fail. In cooperation with a geotechnical (soils) engineer, we designed earth anchors to prevent any further movement of the wall. First, vertical steel pipe piles were driven at the base of the wall to support a concrete waler beam. Then, using a pneumatic hammer, two rows of Manta Ray anchors were installed through holes drilled through the existing concrete. Thus, the wall is securely tied back into competent load-bearing soils behind the wall. The project was completed in a timely manner and on budget.
There are thousands of walls in Seattle which are similarly in danger of failing.
These are the vertical steel piles.
This scaffolding is used to support the pneumatic hammer.