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Sydney & New South Wales

Retaining Wall Geotechnical Advice Sydney

Retaining walls depend on ground conditions, groundwater, drainage, surcharge loads and construction sequence. We provide geotechnical parameters and site advice to support structural retaining-wall design, approval and construction.

Indicative feeScope-basedPrimary referenceProject-specific geotechnical parameters and recommendationsCoverageGreater Sydney & NSW

When this service is useful

The right scope depends on your development, site access, ground conditions and the information needed by your project team. This service is commonly used for:

  • New boundary, basement and landscaping retaining walls
  • Walls supporting buildings, driveways or neighbouring property
  • Existing walls showing movement, cracking or drainage concerns
  • DA or CDC documentation requiring geotechnical input

What the assessment can include

  • Review of wall concept, levels, loads and site constraints
  • Investigation of founding and retained materials where required
  • Assessment of groundwater and drainage conditions
  • Selection of earth-pressure and foundation parameters for the structural designer

What you receive

  • Ground model and relevant design parameters
  • Founding, excavation and backfill recommendations
  • Drainage, surcharge and construction-sequence considerations
  • Inspection or verification requirements for construction

Frequently asked

Retaining Wall Ground Advice questions

Do you structurally design retaining walls?+

Our scope provides the geotechnical information and ground-related recommendations used by the structural designer. Structural wall design should be completed by an appropriately qualified structural engineer.

Why is drainage important?+

Water pressure can significantly increase wall loading and affect the retained ground. Drainage details, outlets and long-term maintenance should be addressed in design and construction.

Can an existing wall be assessed?+

We can assess accessible site and ground-related conditions. Depending on the question, input from a structural engineer, surveyor or drainage specialist may also be necessary.