Backfill behind the wall with gravel for drainage.
Sleeper retaining wall drainage details.
This is to relieve water pressure on the face of the wall.
Install a drain behind the wall.
They are screwed in without needing pre drilling and hold sleepers very firmly.
These walls are the tie back and crib generally used when the wall has to be higher than 0 9m 3ft although not limited to.
The new wall is going to block the natural drainage down the slope so level 50 mm wide gaps between the sleepers along the bottom course and put a length of perforated drainage pipe behind the sleepers and cover it with gravel to stop it blocking up with soil and roots.
Retaining walls sleeper wall details.
Use an aggi pipe with a 100mm gravel surround maximum stone size of 10mm.
How to build a sleeper retaining wall.
Brian ashworth june 10 2013.
The design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning.
A retaining wall is built to hold back a certain amount of soil.
The sleepers will need to be pinned through the height to keep them stable lots of different ways to do that.
Landscaping screws are great for joining sleepers together.
However retaining walls are built with a certain capacity in mind.
Logs or sleepers both fixed in by posts while on the other hand the open face walls have gaps in the face basically for drainage.
The sleepers themselves should be built up with staggered joints.
Continue the gravel up to just below the surface at least 100mm thick behind the wall.