|TENSILE STRENGTH OF TENAX TT GEOGRIDS (Certificate ITC DVT-0001 of 14.03.2011)
(LTDS) at 120 years
The Panel Wall System consists of prefabricated concrete wall facing elements, geogrid reinforcement layers made of high density polyethylene and a PVC-coated metal connection bar.
The reinforcing element
TENAX TT mono-oriented geogrids
TENAX geogrids are two-dimensional
structures made of high-density
polyethylene (HDPE) manufactured by
extrusion and mono-directional drawing
of the material. This technology produces
reinforcing elements with excellent
technical properties which make their
application for innovative solutions possible.
TENAX geogrids are chemically inert with a
high tensile strength and modulus and are
specifically produced for the reinforcement
of soils. The particles of soil or aggregate
partially enter the geogrid openings
creating a complete intelocking effect,
limiting relative movements and increasing
the overall shear strength of the soil/grid composite.
The application of normal stress on the
particles, produces soil compaction
and an interlocking effect between the
two faces of the geogrid layers ensuring
a highly effective level of interlocking.
The composite soil-geogrid structure
behaves like a single reinforced monolithic
block where the insertion of the geogrid
provides the element an increased tensile
strength in a material (backfill soil) that
without reinforcement would resist only
As a consequence the soil-geogrid structure
combines the high compression strength
of the granular fill soil with the high tensile
strength of the geogrids thus creating a
material with a higher rigidity and stability
than the aggregate alone.
The geogrids stress absorbing capability,
through re-distribution, further improves
the resistance to static and dynamic loads in
TENAX geogrids are therefore an innovative
and cost effective solution from both
a technical and economic viewpoint in
all applications that require improved
properties of granular, cohesive, loose or
TENAX geogrids are manufactured and tested according to the procedures
contained in the TENAX Quality System put into effect and certified in
conformity with the ISO 9001:2000 standard.
Close control over each stage of the production, storage, delivery and support process guarantees adherence and conformity of the provided
Precast concrete panel
The precast reinforced concrete panels - are
pre-fabricated concrete panels (minimum class
Rck 350) reinforced with a welded wire mesh
(diameter of 6-10 mm) and having a constant
thickness of 140 mm.
There are essentially three panel types:
1. the base panel measures maximum
2.0 x 0.8 m;
2. the standard panel that has a size of
2.0 x 1.6 m and the
3. top panel with variable dimensions to adapt
to the profile of the embankment project up
to a maximum 2 x 2.4 m.
The element of transverse wires tested for
pull-out resistance of the reinforcement
geogrid has been evaluated experimentally,
and it was observed an increase in the range of
five to six times compared to a reinforcement test specimen of exclusively linear development
with the same contact surface.
Moreover, the increase in pull-out resistance
has been raised by the capacity of the grid
elements to bring about a “dynamic interlock”
phenomenon inside the backfill soil, while the
openings in the geogrid structure cause soil
grains to get stuck inside as, during compaction
operations, these particles are forced into
the openings of the mesh dilating the polymer
substance of the reinforcement mesh. When,
at the end of the compacting action, the mesh
openings tend to turn back to their original
state, the internal stress created envelops the
granular ground particles and reduces the
horizontal thrust of the backfill on the face wall.
Typically constructed using compacted granular
backfill, selected site-won or imported material.
There is also the opportunity to use carefully
selected recycled or stabilized backfills within
the reinforced soil mass thereby dealing with
environmental pressures concerning the use of
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