Gabion Wall Foundations

Step 1

Remove topsoil and soft subsoils

Road base thickness

The required thickness of road base, depends on the actual site subsoil conditions.

Compacted Hardfill

In general you will need to remove topsoil, peaty organic material, and softer subsoils.

Foundation testing

Small non engineered retaining walls, are unlikely to require Scala Penetrometer foundation testing.

Road base compaction

When placing 4″ depth of road base or greater, you will need to use a plate compactor

Proper compaction, eliminates future consolidation, and foundation settlement.

Sand Blind

Some contractors place thin layer of sand over the basecourse for final foundation leveling.

This should not be done on sites that have high groundwater flows.

Stepped foundations

Stepping the foundation, allows walls to be built on sloping sites

Gabion foundation examples

Foundation design example

Concrete ledges were cast into the bedrock.

The concrete foundations were based on the gabion basket sizes being installed.

Foundation questions

If you have any other gabion foundation questions, please email us some pics of your site with your questions.

Concrete foundations

It is very rare for a gabion walls to require a concrete foundation, below is an example. If you site has groundwater issues, it may be advisable to use galv coated reinforcing steel

Double width base gabion

The extra width of the base gabion improves, wall stability, cand reduces the bearing load on the subsoil,

Spreading the load over a larger area, allows gabion walls to be built on weaker subsoils without expensive foundations.

INTERESTING LINKS

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