TENAX TT mono-oriented geogrids
Welded wire mesh formwork
Integrated geogrid system/metal formwork/vegetative mat
The reinforcing element provided by the TENAX RIVEL
System is composed of a TENAX TT series monoriented HDPE geogrid (1) and on the face by a non structural guiding and supporting "left
in place" formwork (2), produced by bending to the slope angle
a sheet of welded wire mesh (150 x 150 mm mesh or also 200x200 mm,
Ø 8 mm).
The formwork is supplied with hooked tie rods that
guarantee the geometric stability of the formwork itself during
the soil compaction phase.
The use of the "left in place" formwork provides a rapid
rate of installation and more accurate project construction and
A vegetative biomat (3) is placed on the inner face
to protect the face against the erosion and create an adequate surface
for the eventual hydro-seeding or sowing of suitable grasses.
|CONSTITUTIVE ELEMENTS OF THE TENAX RIVEL SYSTEM
Inert material for embankment
The reinforced soil technique allows, the use of almost any kind
of fill soil; however, the use of granular material having a good
drainage capacity and a high internal friction angle, is suggested.
Better to avoid the use of very coarse gravel and big cobbles
since the compaction of the soil would results much more difficult.
In case the inert material available in situ presents poor geomechanical
properties, the mixing with imported gravel and sand is sometimes
suggested. Near the face the fill soil shall be a good topsoil
so as to create the best conditions for grass growth. The fill
soil shall be spread and compacted, in several lifts with a thickness
of 0.30 m - 0.35 m, until reaching a minimum 95% Standard Proctor
TT mono-oriented geogrids - Reinforcing elements
The reinforcement element foreseen for the TENAX RIVEL System is
a mono-oriented HDPE geogrid of the TENAX TT series. The TENAX TT
geogrids have a chemically inert structure that, thanks to particular
and patented technological processes, reaches very high tensile
strength. The aperture of the geogrid allow the soil particles to
interlock, thus providing an optimal lateral confinement to the
granular soil, therefore limiting the related movements and increasing
the shear resistance.
wire mesh formwork
The TENAX RIVEL System on the face makes use of a sacrificial formwork made up of welded wire mesh mechanically bent to the desired slope
angle (mesh 150 x 150 mm or 200 x 200 mm; Ø 8 mm). The horizontal
and the inclined sides of such formworks are linked by special hooked
steel bars that guarantee the geometrical stability of the formworks,
even during the compaction of the soil. The use of such formwork
allows fast installation rates, coupled to an accurate and uniform
A biomat is placed inside the wrapping of the reinforcing geogrid
to protect the face from rain fall and wind erosion and to constitute
a proper medium on which the hydroseeding of suitable herbaceous
essences can be done.
The last phase of the work consists in hydroseeding the slope face
during the most suitable climatic period. The integrated hydroseeding
mix consists of herbaceous essences with long root apparatus together
with conglomerating and colloidal materials, humus and fertilizers
containing long lasting micro and macro elements.
face may be obtained also by planting willows, rootstocks and bushes,
placed in between the reinforced layers; in such a way a better
root network is obtained which in turn provides an even more uniform
and dense vegetation coverage.
|TENAX RIVEL - Installation guides
TENAX RIVEL geogrid system for reinfored soil walls and steep slopes
|TENAX RIVEL - Applications
of retaining walls
sound deadening barriers
of road and railway embankments
embankments and reinforcement for waste landfill
for rockfall protection