envirogrid ® base stabilization...2 | page (281)820-5493 installation manual the following are the...

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EnviroGrid® Base Stabilization

Geo Products, LLC 12626 North Houston Rosslyn Road

Houston, TX 77086 281.820.5493

www.geoproducts.org

http://www.geoproducts.org/


Installation Manual The following are the installation recommendations for the use of our EnviroGrid® cellular confinement

system for base stabilization.

An installation crew is comprised of (3) laborers. A larger crew will help with a faster installation.

1. Subgrade is to be prepared per project engineer’s specification based on depth, grade and

compaction. The EnviroGrid® geocell is flexible system so it will follow the subgrade profile.

Any imperfection on the sub base will show on the EnviroGrid®.



2. If required, once, the subgrade is prepared a non-woven geotextile fabric is installed. The

geotextile is used as a separator to prevent the EnviroGrid® infill material from migrating into a

softer subgrade. The geotextile is easy to install just unrolled directly over the soil and

overlapped if needed.



3. The panel expansion of the EGA20 EnviroGrid® geocell is 9’ x 20’ (180/SF/panel). The panels

can be expanded along the length of the area or across the width based on the geometry of the

area to be covered. The panels can also be easily cut with a utility knife to fit the desired area.

4. To increase installation rates the panels can be joined together prior to expansion. This can double, triple or quadruple your covered area at every deployment. Please keep in mind that the more panels that are joined the larger crew needed for deployment. It is best at the beginning to expand a single panel to get a basic understanding of how the panels are deployed.



5. Adjacent panels can be joined by hand stapling (3” and 4” cell depth) or by using our EnviroLocks (3”, 4”, 6” or 8”).

6. For larger jobs a pneumatic stapler and staples is recommended. This does require a small compressor (100 PSI) and a generator.



7. The panels have a tendency, when first pulled, to open up in the shape of an hourglass. Pull the

panels to the 20’ length and stake at each end on the 9’ dimension. Then pull the edges on the

20’ direction to insure a rectangular expansion. At this point, you can stake the panels along the

20’ length at every other cell. You can use straight stakes, J hook stakes or even sandbags to

hold the panels in place.



8. You can now start filling the cells and when the panels are filled the stakes or sand bags can be

pulled out and reused for other panels. Never drive equipment over empty cells. Typical infill

material is a crushed aggregate (#57 stone, limestone, decomposed granite, recycled concrete).

Rock size no larger than 1/3 the depth of the cell. For example for a 3” EnviroGrid® no larger

than 1”. Rock should contain smaller rocks as well to help the interlock of the aggregate (rock

should not all be the same size). Do not fill the cells with pea gravel or any other rounded rock.

Do not overfill the cells more than 2-3 inches. Material on top of the cells is NOT confined and it

will move laterally.

9. If the EnviroGrid® geocell is placed above grade a gravel ramp needs to be created to allow the

equipment to get on top of the expanded panels. If not the first cells will be crushed.



10. Once the ramp is built, the trucks with the fill material can get on top of the FILLED cells and

dump the full load.



11. An excavator is then used to push the fill material on to the empty cells.

12. When dumping fill material on to the cells keep the bucket as close to the empty cells as

possible. Limit the drop height to no more than a couple of feet above the cells.



13. Typical overfill of the cells is 2-3 inches. After this has been accomplished, a vibratory roller can

be used to get the desired compaction.

Equipment needed:



EQUIPMENT LIST

EnviroGrid®

Geotextile- 6 ounce or 8-ounce non-woven geotextile

Infill Material- Typical infill material is a crushed aggregate (#57 stone, limestone, decomposed

granite, recycled concrete). Rock size no larger than 1/3 the depth of the cell. For example for a

3” EnviroGrid® no larger than 1”. Rock should contain smaller rocks as well to help the interlock

of the aggregate (rock should not all be the same size). Do NOT fill the cells with pea gravel or

any other rounded rock

Panel attachment method (you can use any of the following)

EnviroLocks

Hand Stapler

Pneumatic Stapler , compressor, generator

Panel anchoring method (you can use any of the following)

Rebar J hooks

Rebar straight stakes

EnviroClip helical anchors

Sand Bags

Safety glasses, work gloves

4 lb. hammer

Utility Knife (recommended hook blade)

String Line

Measuring tape

Shovel


envirogrid ® base stabilization...2 | page (281)820-5493 installation manual the following are the...

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