Engineers can save owners money by using helical tiebacks for lateral support of retaining walls and foundations. In the photo to the right, Avalon installed tiebacks on a sandy sea bluff alongside thirty-five foot deep drilled piers. The 1.75 inch square shaft helix tiebacks were tension tested to 73,000 lbs each. The video below shows the completion of installation of one of the tiebacks, sixty-five feet in length.
Avalon builds retaining walls in difficult places, often inaccessible to large equipment.
The following five pictures concern the replacement of a collapsed retaining wall that had been supporting a creek-side home. The first photo shows the retaining wall which had fallen over.
With small equipment, Avalon installed vertical helix piers to support the new retaining wall, with helix tiebacks for lateral support.
Vertical and diagonal helix after preliminary concrete pour.
The tieback extensions are galvanized, epoxy coated, and taped for triple protection. Foam wrapping was installed to protect the tape from gravel backfill.
