Geogrid Installation


  1. Step 1: Excavate reinforced soil area.
    Remove existing soils in the reinforced soil area to the maximum embedment length of the geo-grid design. Provide a generally level soil condition behind the wall units for the placement of each geo-grid layer.
  2. Step 2: Cut Geogrid.
    Cut sections from geo-grid roll to the specified length (embedment depth). Geo-grid roll direction is from the wall toward the embankment (check manufacturer's criteria). In most cases correct orientation is to roll the geo-grid perpendicular to the wall face.
  3. Step 3: Install Geogrid.
    Hook geo-grid over the fiberglass pins to ensure a positive mechanical connection between the unit and geo-grid
  4. Step 4: Secure Geogrid.
    Pull the pinned geo-grid taut to eliminate loose folds. Stake or secure back edge of geo-grid before and during backfill and compaction. Remove stakes, if desired, once backfill is placed. Place additional sections of geo-grid, abutting each other, for continuous coverage at each layer.
  5. Step 5: Install next course of Keystone units.
    Check for level with each new course.
  6. Step 6: Place compacted backfill over geo-grid in 8" lifts.
    Provide a minimum of six inches reinforced fill coverage prior to driving equipment over the geo-grid with wheeled or tracked equipment. Avoid driving or turning equipment directly on geo-grid to avoid excessive damage.
The picture shows some geogrid installation steps.

Geogrid installation steps

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