There is no need to prepare a special base for the drain tile itself of course you need a base for the block that makes up the wall as you indicated.
Retaining wall drain tile installation.
This means the drain tile may have to be extruded through the face of the wall figure 2 or at the end of the wall figure 3.
Installation at ground level.
Designed for blocks with height of 8 in.
A retaining wall is built to hold back a certain amount of soil.
Drain tile drain tile should be placed behind the wall and extruded wherever possible.
Works with block or timber.
Excavate a trench or series of connected trenches to accommodate the perforated drain tiles.
Why proper drainage is important for retaining wall performance.
End snaps into 4 in.
Use a shovel to cut up sections of turf and place them as intact as possible on a tarp for later.
The design of a properly built retaining wall resists the force.
Some professional installers find that nearly 80 percent of the retaining walls they see fail at some point due to improper drainage.
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.
100 mm drain tile.