Rainstore
3
Storm Drainage Detention & Exfiltration with Geotextile Fabric
7
5.8 Wrap Geotextile
:
A.
After the second layer of geogrid is installed, the anchored geotextile fabric
surrounding the Rainstore
3
installation can be wrapped around all sides and the
top of the Rainstore
3
chamber.
B.
Remove anchor material from the geotextile fabric. Enclose the Rainstore
3
cells
by bringing the fabric around the sides to the top of the cells. Seams should be
sealed according to manufacturer recommendations.
5.9 Add Maintenance Ports/ Connect Inlet & Outlet Pipes:
A.
Prefabricated boots are available to provide a water tight connection between the
Rainstore3 units and any maintenance ports, inlet or outlet pipes. This replaces
securing the geotextile fabric around a pipe using a hose clamp. The
prefabricated boots are available from any geotextile manufacturer.
B.
Boot Pipe Installation (from Environment Protection, Inc.
www.geomembrane.com)
a.
Prepare the sub grade around the area of the pipe. The sub grade must be
smooth, uniform, and free of any protrusions.
b.
Clean the surface of the liner around the penetration where the boot will
be welded in place. Wipe away any dirt or dust particles. The surfaces of
the liner, boot, and the pipe must be completely clean and dry.
c.
Slide the boot sleeve on the pipe, making sure the boot is aligned and all
surfaces are smooth. It may be necessary to trim the excess tapered
portion of the boot sleeve.
d.
Weld the boot apron to the liner using adhesive. Apply the adhesive to the
liner and the boot apron. Let the adhesive setup for several seconds before
pressing the boot apron and the liner together using a roller. Make sure to
smooth out any bubbles or wrinkles.
e.
Seal the boot sleeve to the pipe using the stainless steel hose clamp. The
clamp around the pipe will form a watertight seal to the pipe.
C.
Maintenance ports/boots and pipes should be completely sealed to the
impermeable PVC liner per manufacturer’s requirements.
5.10 Side Backfill & Compaction:
A.
The area around the installed Rainstore
3
structure must be backfilled with self
containing structural aggregate. The fill material should be applied gradually. The
fill should be compacted in a maximum of 12-inch high lifts to 95% proctor
density. Backfill to the top of the geotextile wrapped Rainstore
3
structure.
B.
To ensure the backfill is properly compacted, have a Geotechnical Engineer test
the fill density on site.
5.11 Geogrid - Third Layer:
