Geoweb retaining walls
Geoweb® retaining wall introduction
Geoweb® retaining walls are grass and plant covered in order to blend into the environment.
The Geoweb® mat is very light, and the wall can be built using a local contractor and even DIY with some basic training.
Geoweb® retaining walls are ideal when the budget is low and can be built in gardens, landscaping, and large civil engineering projects.
A Geoweb® retaining wall is an open cell plastic mat filled with earth to create a gravity retaining wall. Geoweb® walls can be built using a gravity design to 1m. After 1m, the design changes to a soil-reinforced design.
Vegetation solution
The system creates an environment where plants and grasses grow within the retaining wall surface.
The vegetation system helps collect stormwater runoff. Soil-filled front cells allow grasses to grow and establish, creating a green wall.
Geoweb® retaining walls design
Geoweb® can be laid on well-consolidated ground.
Soil is excavated from behind the wall to a width defined by the design.
A geogrid is placed under every 3/4 course. The geogrid strength and length will be designed using the soil type and wall height.
The geogrid stops the soil from slipping and acts as a single mass. The soil mass and geometry prevent the wall from overturning.
Geoweb wall design guide
| Height (m) | 1.5 | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 |
|---|---|---|---|---|---|---|
|
Geoweb® depth (mm) |
900 | 900 | 900 | 900 | 900 | 900 |
| Geogrid length (mm) | 1200 | 1500 | 2100 | 2800 | 3500 | 4200 |
| Base Width (mm) | 1200 | 1500 | 1500 | 1500 | 1500 | 1500 |
| Base Depth (mm) | 150 | 150 | 150 | 150 | 150 | 150 |
| Surcharge (mm) | 10kn/m² | 10kn/m² | 10kn/m² | 10kn/m² | 10kn/m² | 10kn/m² |
| Factor of Safety | M=1.5 | M=1.5 | M=1.5 | M=1.5 | M=1.5 | M=1.5 |
| Sketch |  |
 |
 |
 |
 |
 |
The design table above has been created to allow us to build budget costs. The designs are Indicative for geoweb retaining walls based upon a base material with allowable bearing pressure of >200kPa.
The design uses well-graded, granular backfill with the back of the wall having drainage to relieve hydrostatic pressure.
All indicative information presented in this table is based upon assumed loading and ground conditions. This table is for guidance purposes only and will be subject to change following a detailed, site-specific design developed by an approved structural engineer.
Gallery of Geoweb retaining walls
Compare prices of retaining wall types
Which retaining wall type is the most economical to build? We have written a free guide on retaining wall price comparisons. The guide details the different types of retaining walls and gives you a price estimate of each type to compare.
Retaining wall price comparison guideGeoweb retaining walls design service
The design of a geoweb retaining wall requires knowledge of the retaining material, the water table, the ground bearing capacity and any site constraints. The design requires a ground investigation and a structural engineer to ensure the design is fit for purpose.
We offer a full design service from carrying out the ground investigation to final working drawings.
Learn about our design serviceOther types of walls
FAQs about Geoweb retaining walls
We do have a comprehensive price table and budget calculator in our price guide. The price guide costs change over time so we keep it in one document.
You can download the document from this link. Get the price guide.
The design of Geoweb retaining walls depends on the height of the wall. Walls below 800mm can be built just using the geoweb units in a gravity design. Walls above 800mm require a reinforced soil structure tied into the geoweb.
The layers of geogrid and soil create a sandwich that stops the soil from shearing, and the soil acts as a single mass.
Geoweb retaining walls with soil reinforcement is an economical solution.
The layers of geogrid and soil create a sandwich that stops the soil from shearing, and the soil acts as a single mass.
