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© 2014 Foundation Supportworks
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,
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p 335
Chapter 5
PolyLEVEL
®
Polyurethane Foam and Resin
CHAPTER 5
POLYLEVEL
®
POLYURETHANE FOAM AND RESIN
Municipal
applications of PolyLEVEL foam
include void-filling and lifting of roadway
sections, runways and taxi-ways at airports,
and floor slabs within schools and other city
buildings. Dips and sags along roads can be
lifted and releveled
(Figures 5.2.d1 and 5.2.d2)
.
Approach slabs to bridges often settle relative to
the bridge abutments due to poor compaction
of fill soils, consolidation of deep fill within the
embankment, or consolidation of the native soils
beneath the embankment. The bumps before
and after bridges can be removed or softened
with the injection of PolyLEVEL. PolyLEVEL
is a great option for airports where sections
of runways or taxi-ways cannot be shut down
for long periods. Maintenance plans including
ground penetrating radar can be implemented
to locate voids beneath the pavement and fill
them with PolyLEVEL before there is a much
larger issue. Terrazzo floors within schools and
other city buildings create an excellent wearing
surface, but are expensive to repair or replace.
PolyLEVEL is injected through small
5/8
-inch
diameter holes drilled in the slabs.
Specialty
applications of PolyLEVEL foam
include void-filling after slabs and foundations
are lifted with the piering systems described in
Chapters 2 and 3, and pipeline/utility projects
as a ditch block or trench break material. Ditch
blocks prevent water from eroding soil as it
migrates through the backfill and along pipes
from higher to lower elevations of sloped terrain
(Figure 5.2.e)
. PolyLEVEL is often a faster and
more economical alternative to concrete collars
and even sand bags. PolyLEVEL Trench-Breaker
is a highly specialized product that dissipates
heat quickly during application so as not to create
a fire hazard as it is placed in wide, thick layers.
Another specialty product is the single-part,
non-expanding PolyLEVEL resin. As mentioned
in Section 5.1, the singe-part resin is injected
deep into loose soil as a binder to stabilize the
soil from further consolidation/densification, or
to allow vertical excavations
(Figure 5.2.f)
.
Figure 5.2.d1
PolyLEVEL injection while
maintaining an open lane for traffic
Figure 5.2.e
Placement of
polyurethane foam trench breaks
Figure 5.2.d2
Monitoring pavement lift with string lines
Figure 5.2.f
PolyLEVEL resin stabilizes loose sand to
prevent undermining of slab during column repair