Fill the trench with a 2 to 3 inch layer of paver base.
Retaining wall gravel depth.
The wall gets its strength from a sturdy base consisting of gravel.
Pecan concrete retaining wall block 144 pcs.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
Plan to bury some portion of the first layer or two of block or brick to ensure wall stability.
Retaining wall base trench dig a base trench 24 in.
The exact depth of the.
Backfilling your retaining wall.
25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed compact the base trench making a minimum of two passes with a walk behind plate compactor.
For a stacked block retaining wall that s no higher than four feet a trench filled with three inches of crushed rock will help keep the wall from shifting and settling.
A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it.
46 5 face ft.
Replace native soil behind the wall with 3 4 minus or bank run gravel for 2 feet.
150 mm plus an additional 1 in.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
A trench filled with gravel provides a suitable foundation base for a short step back retaining wall with three five courses each layer of blocks is called a course.
Line the inside base of the wall with 4 inch perforated tile drain on a gravel bed that slopes 1 inch for every 4 feet of run to carry water to daylight or a dry well.
Due to soil erosion your retaining wall should be built on a solid foundation made from paver base.
600 mm wide the length of the wall the depth of the trench will be 6 in.
The oregon state university extension service recommends burying the bottom row 1 inch for every 8 inches of wall height.
Adding proper backfill to your retaining wall is extremely important as this is a key element in helping divert water away from the back of the wall eliminating hydrostatic pressure the leading cause of retaining wall failure.
Similar to gravel paver base is a form of construction aggregate that contains crushed rocks such as limestone.
Follow the block manufacturer s instructions for wall height limits.
Choose a paver base with landscape rocks between 1 2 inch and 3 4 inch in size.