Geogrid Installation Guide

1. Compact the road surface and aggregate, and then pave the geogrid.
2. Fix the geogrid, pave the aggregate and then compact it. The height between the geogrid and the road surface depends on actual field conditions and needs.
3. The gap between geogrid ribs allows the aggregate to pass through the geogrid and interlock with the geogrid, thus reducing the transverse movement of aggregate and improving the loading capacity of the subgrade.

The required length, vertical distance, number of layers and strength of geogrid vary with every retaining wall project, depending on the specific slope height, load, gradient and water & soil conditions.

For retaining wall taller than 3-feet to 4-feet, it generally requires a licensed professional engineer (P.E., licensed in the state where the project is located at) to do a final wall design and to calculate the desired quantity of geogrid according to the actual field conditions.

1. Excavate the existing soil and then compact and reinforce the excavated area to facilitate the laying of geogrid.
2. Cut the geogrid into desired length (embedded depth) and then put it on the compacted soil.
3. Drive the pins through the geogrid and the lower-course units for fixing.
4. Place and compact the soil backfill above the geogrid, tension the geogrid to avoid wrinkling.
5. Place a minimum of 6 inches of soil backfill over the top geogrid layer and then compact it.