Installation Guideline: EnviroGrid® Cellular Confinement Soil Stabilization

A two to four-man crew of semi-skilled labor without any specialized equipment can install EnviroGrid® cellular confinement quickly and easily. Sections are shipped to the job site in collapsed form.

1. Excavate and shape the subgrade soil to the elevations, grades and dimensions as shown on the drawings.
2. If the infill material is different from the sub-base material, a geotextile should be used as a separator. A woven or nonwoven fabric should be selected depending on whether strength or permittivity is important. Simply unroll the geotextile directly on the subgrade, overlapping adjacent panels by 18 inches, minimum.
3. Determine where the first section of EnviroGrid® cellular confinement is to be placed and put straight stakes or J-Hooks (rebar bent like a candy-cane) at the four corners.
4. Stretch a section beyond its intended length and then allow it to relax back. Place the section over the embedded stakes or J-Hooks. Additional stakes or J-Hooks may be needed along the perimeter in order to get full expansion of each cell. In situations where it is not practical to use or J-Hooks (over rocky soil, etc) a stretcher frame may be needed. Adjacent sections of cellular confinement are installed in a similar fashion and butted or stapled together to achieve continuous coverage.
5. Fill in the first rows of cellular confinement with a front-end loader or dump truck and push the fill into the cells using shovels or a bulldozer blade. A "ramp" of fill material immediately adjacent to the EnviroGrid® will likely be necessary to allow equipment to climb onto the EnviroGrid®. Continue until all cells are filled. Never allow any equipment to drive over unfilled cellular confinement. Always overfill the cells slightly to allow for consolidation and compaction.
6. You are now ready to compact the EnviroGrid® cellular confinement system. The most common method of compacting is through multiple passes by the tracked equipment used to spread infill. A vibrating roller and/or water may be required to achieve the specified level of compaction.
7. Once the cellular confinement is filled and the system is compacted, the EnviroGrid® base is ready to withstand heavy traffic loads.