Retaining Walls
Gabion Retaining Wall Design, Drainage and Material Selection
Gabion retaining walls are flexible, permeable gravity structures. Their apparent simplicity does not remove the need for geotechnical and structural design.
Technical Knowledge Team · Updated September 22, 2026 · 9 min read
Core stability checks
- Sliding, overturning and bearing capacity
- Global slope stability and settlement
- Wall batter, course arrangement and setbacks
- Drainage paths and erosion at the toe
- Seismic, surcharge and hydraulic loads where applicable
Drainage and filters
The stone body is permeable, but fine soil can migrate into its voids. A correctly selected geotextile or graded filter behind and below the wall helps retain soil while allowing water to escape.
Surface runoff, outlets and toe scour must be managed so water does not undermine the foundation or bypass the filter.
Choosing the mesh material
Galvanized or coated wire is familiar and widely specified. In corrosive or chemically aggressive settings, a non-metallic polypropylene composite mesh can remove the steel-wire rust mechanism from the basket material.
The decision should compare tensile and connection data, temperature limits, UV exposure, fire requirements, construction damage risk and required approvals.
Frequently asked questions
Do gabion retaining walls need drainage?
Yes. The stone mass is permeable, but the complete wall still needs designed filters, outlets and runoff control.
Can a gabion wall be built without an engineer?
Small landscape work may follow local rules, but retaining structures with meaningful height, surcharge or hydraulic exposure need competent design.
Project-specific support
Send drawings and exposure conditions for technical review
Product information supports evaluation and procurement; final design and regulatory compliance remain project-specific.