Fill the hole in with concrete.
How to build retaining wall with concrete sleepers.
How to build a concrete sleeper retaining wall laying out.
How to build a retaining sleeper wall 1.
The benefits of using a durawall concrete sleeper retaining wall are numerous.
Sleeper retaining wall posts come in two varieties steel galvanised h beams or a vertical sleepers.
For example if your wall is going to be 800mm high the holes for your posts should be 500mm deep.
Dig around 600mm deep and 450mm.
Continue building to the top.
Building a retaining wall with concrete sleepers is one of the easiest methods you can use to build a retaining wall.
Maintain the 25mm step back and ensure all sleepers are firmly fixed to the ones below.
Install a drain behind the wall.
The area you are planning for landscaping or building the retaining wall with cement sleepers has to be on.
Maintenance free concrete sleepers will not rot burn warp split or flake and is resistant to termites white ants.
Other systems you can use include timber sleepers which are also very light and easy to install but are also prone to rotting fading and white ant damage.
Prepare a 50mm deep footing for your wall using a sand and cement mortar mix.
In fact this system is a great option for diy.
Excavate the area with the help of a mini loader with a 300mm auger.
Time now to concrete your posts into position.
Lay the first course of sleepers levelling them with sub base and leaving gaps for drainage.
Lay the second course on top of the first setting it back 25mm from the front.
Durable it will last at least 4 times longer than a timber wall.
Dig down to firm ground.
Using sleepers as your posts costs about a third of the price of h beams.
Lay the first course of sleepers and fix by inserting metal rods through pre drilled holes into the footings as shown above.