Check out this video for some simple instructions on installing a french drain behind an 18 to 24 tall retaining wall before it is backfilled with dirt.
Retaining wall drain tile.
Thanks for posting this information about retaining wall drainage.
This loose rock is probably more than other companies would use but we would rather allow more water to flow behind the wall and out than not have enough.
Any reinforced wall or walls over 4 ft.
1 2 m in height or with slopes or other surcharges above the wall will need a toe drain.
Install it in a u shape way behind the wall.
Together these four features will provide adequate drainage for most designs.
Use a shovel to cut up sections of turf and place them as intact as possible on a tarp for later.
Block manufacturers as well as experienced contractors.
Drainage third since most retaining walls are.
Although there are exceptions most retaining walls require gravel backfill soil compaction pipe or toe drains and weep holes.
I thought the drainage pipe method could be an interesting choice.
It seems having a good draining system is important to help retaining walls stay in good condition.
The toe drain and the wall rock is designed to remove incidental water from behind the wall and is not meant as primary drainage path for above or below grade water management.
In all cases wall rock is located within the cores of the block and a minimum of 12 in.
Use drainage tubing behind the wall.
Fabric keeps rock and soil separate.
300 mm behind the block.
Backfill second a retaining wall must have properly compacted backfill.
Backfill refers to the dirt behind the wall.
The process of making sure that a retaining wall drains properly is relatively simple but it is not very flexible.
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Fabric keeps soil from leeching out of walls.
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Slope the tubing from one end of the wall to the other or from the ends to the middle.
Excavate a trench or series of connected trenches to accommodate the perforated drain tiles.
Cut holes into the wall to let water out.
Backfilling the space behind the blocks with crushed stone and then installing a flexible perforated drainpipe available at the home depot also called drain tile at the base of the wall could.