Why proper drainage is important for retaining wall performance.
Best backfill material for retaining wall uk.
Stone is a great choice for backfill because it s durable and offers great drainage.
Retaining walls can range from simple raised garden beds to large walls several metres in height built to control erosion redirect water and prevent landslips.
Compacted native soil can be used to backfill the rest of the space.
The use of commercial by products such as furnace slag or fly ash as backfill material may be advantageous where such products are locally available and where suitable natural materials cannot be found.
In order to provide proper drainage at least 12 inches of granular backfill gravel or a similar aggregate should be installed directly behind the wall.
Backfill refers to the material used to refill an excavated hole and it is typically used to strengthen and support a structure s foundation while also promoting better water drainage.
A retaining wall is built to hold back a certain amount of soil.
When you have built your retaining wall then you will need to add some backfill to the hole in order to shore up the wall and prevent any type of collapse of the underlying structure when you are ready to add your backfill to the hole you should make sure that you have enough suitable material to install in the hole and also take care that you avoid problems such as collapse of the.
Fly ash has been used as a lightweight backfill behind a 25 foot high wall and as an additive to highly plastic clay.
Do choose a material you can easily work with.
Let the concrete cure for at least a week before backfilling 28 days is best.
However retaining walls are built with a certain capacity in mind.
Retaining walls can be constructed using a variety of materials from poured concrete and large timbers to natural stones even bricks.
Explore the five best.
Backfill refers to the dirt behind the wall.
The design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning.
Second a retaining wall must have properly compacted backfill.
A retaining wall is normally needed when a slope has lost its natural integrity or is composed of inherently unstable materials such as gravel or sand.
This video shows how a retaining wall should be back filled to allow for maximum drainage.