Backfill with gravel behind the wall to cover the drainage pipe.
How to build hollow concrete block retaining wall.
Fill the concrete cores with crushed gravel.
How to build a concrete wall figure a.
Of leveling sand and half the height of the first course of blocks.
The height of the wall and soil type determine the footing size and steel reinforcement requirements so check with a building authority for regulations and engineering specifications and for any required.
Flexural stress comes from the pressure of the load the walls bear from the upper floors or roof of a house or from storms or seismic activity.
The concrete foundation needed to support a cement block wall is usually created by pouring concrete into a hollow form lining the sides of the excavation trench but the concrete can also simply be poured into the trench a common scenario for construction of a freestanding landscape wall.
Tall wall excavate a trench deep enough to accommodate 4 to 6 in.
Of compacted base 1 in.
Then hollow blocks are filled with concrete base as an anchor for a solid stable wall capable of resisting pressure from soil and water.
Stack the second course of blocks on top of the first course making sure they remain level.
Cross section of a retaining wall a cinder block retaining wall is only as straight and solid as the base it s built on.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
Follow the block manufacturer s instructions for wall height limits.
Sweep away all debris from the top of the first course of block with a broom.