Install Geotextile Fabric and Drain Stone
At 0:14 in
Necessary steps if you don’t want your wall to fall over.
What happens here
After placing the geo-grid, ensure the drainage system is properly implemented. The video highlights a black geotextile fabric layer that lines the excavated bank behind the retaining wall. This fabric acts as a separator, preventing the native soil from mixing with the drain stone (gravel) that is placed behind the wall. The narrator explains this separation is crucial to ensure 'no soil ever gets convoluted in the stone' and that 'moisture remains free of sediment,' allowing for efficient drainage. The area behind the wall blocks and in front of the fabric is then backfilled with drain stone.
Goal: Create an effective and non-clogging drainage system behind the retaining wall.
Tools and materials
- Drain Stone — Creating a permeable layer behind the wall for effective water drainage
- Geotextile Fabric — Separating native soil from the drain stone to prevent clogging of the drainage system
- Shovel — Moving and spreading the drain stone
- Wheelbarrow — Transporting the drain stone