Gravel works best as the structural backfill for retaining walls and should be well graded. The major benefit of utilizing gravel is that it has a low void ratio, which means that there won’t be much lateral load.
Additionally, you want to have weep holes to allow any residual water to drain. Gravel is also beneficial since it has high load-bearing capabilities when compacted, making it possible to build on it if necessary.
Here, we’ll also go through the specific steps for backfilling a retaining wall.
1) If at all feasible, we ought to install a drainage pipe at the foot of the retaining wall.
2) Concrete should then be added to support the load above the drainage pipe.
3) Next, fill the area with well-graded gravel above the drainage pipe, and then compact the material. Compaction is usually done using the rammers for small-scale projects.
4) To remove water from the retaining wall’s backside, a weep hole should be created perpendicular to the wall’s face.
5) Up to 3/4 of the height of the retaining wall, gravel should be provided.
6) The dirt should finally be poured and compacted on top of the gravel.