RETAINING WALLS Retaining walls are extremely popular for holding back unstable embankments.

Retaining walls are extremely popular for holding back unstable embankments. Many different types of retaining walls are available, using bricks, concrete blocks, tyres, stabilized soil, wooden logs, etc. We specialise in the design and use of Gabion Baskets for retaining walls. The application uses our range of different sized baskets which are laid together, on a layer of geotextile, and laced together to form a structure that is monolithic and harmonious with nature, often using local rock and soil infill to encourage vegetation growth.

Local unskilled people can be used to erect Gabion retaining walls which are shown by our site trainer how to install the products quickly and neatly. Or if you have little time for this we can also present you with a skilled gabion installation contractor who can supply the necessary materials and undertake the full design and installation process for you. He has the knowledge time and experience to do the work quickly and neatly, so the outcome is adjusted to meet, if not exceed your expectations.

We offer a full design and advisory service, visiting the site, doing the full technical design, bill of quantity estimate, and pricing for the works as is required.

There are six main types of retaining walls shown below, depending on the local site conditions. We can advise which application would suit your site best, with appropriate reason for doing so.

  • Mass-gravity Gabion retaining wall. (Dry)
    This wall is used in situations where the embankment is unstable and has no founding in a river situation, where a River Mattress might be required
  • Mass-gravity Gabion retaining Wall. (Wet)
    This wall is the same as above, however is founded in a river with soft river bed soil. So the flexible river mattress apron is required to prevent scour at the toe of the gabion wall.
  • Skin revetment Gabion Wall.
    This wall is used where the embankment stability is safe, and the wall is used to prevent shallow slope failures, and rock falling out of the slope.
  • Gabion mass-gravity Catch Wall.
    A gravity catch wall is used to catch rocks or soil falling out of the embankment, preventing the damage to vehicles and loss of life.
  • Gabion vertical faced Mass-gravity Wall.
    A vertical faced gabion retaining wall is used in an area where limited spacing is available, thus needing a wall not taking up a lot of space.
  • Terraced Gabion Wall.
    A small terrace can be erected using Garden gabions, to make the slope of the land flatter, for playgrounds and sports fields.

Gabions are supplied flat and come in bundles; normally 30-50untis per bundle, the units are also supplied with the appropriate Binding wire, so the price is covered to include this wire. We also suggest that a Grade A4 minimum geotextile is used at all contacts between soil and gabion, to prevent any loss of fine embankment soils during periods of excessive rainfall. The gabion is very porous, and therefore does not require any weep holes for the draining of the soil, and to prevent failure. Gabion walls have a 35% void ratio; also the foundations are flexible and strong and can absorb the different founding conditions of poor clay or undrained soils.

We normally suggest the use of unweathered rock, 1.6tons per m3, and a labourer can generally do about 1m3 per man per day of gabion installations. We also assist in the supply of gabion tools and site training to achieve speed and nice looking gabion structures.

Gabions come in a wide range of different sizes, and we are able to assist you to determine what the most appropriate size is to use on your retaining wall project.

Kindly contact us for the design and supply of your Gabion retaining wall needs. We look forward to hearing from you.

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