If you have noticed signs of retaining wall failure such as cracking, Helical Tieback Anchors may be the answer.
Horizontal Ground Anchors or Tieback Anchors are used in Earth Retention Applications - Dosdourian Enterprises, Structural & Geotechnical Contractor
Anchored retaining walls/Tie back system-Advantages
Retaining Wall Tiebacks: Helical Earth Anchors — Shore Systems Group L.L.C.
Leaning Retaining Walls, Common Foundation Problem
Benefits of Using Helical Tiebacks and Wall Anchors
How to Fix a Leaning Retaining Wall - Evergreen Landscaping
How to repair a retaining wall - Quora
Helical Anchors & Tiebacks
Tieback Anchor System North Carolina
Seawall & Retaining Wall Repair
Helical Tiebacks, California