Cerro Maggiore, MI (Italy)
TENAX MULTIMAT R reinforced geomat used to improve the frictional resistance between the fill soil and the lining system.
The major problem during the design and construction
of a permanent landfill covering system (capping) is to maintain
an adequate thickness of topsoil on the impermeable slopes in order
to permit vegetation growth.
The angle of friction at the interface
between the impermeable liner and the soil mass usually has a very
low value, inadequate for the prevention of soil sliding, even on
Studies must be carried out to guarantee the drainage of any water
that, by running between the membrane and soil mass, can reduce
to zero the soil/membranes’ coefficient of friction. If
such a situation developed, the soil mass overlying the impermeable
membrane would be subject to slippage.
The soil spread onto the landfill slopes is subject to forces
that tend to cause slippage towards the base, and to other forces
that favor stability. If these forces are not equalized with an
acceptable safety factor, then it is necessary to use a suitable
geosynthetic material capable of conferring to the topsoil those
properties required for guaranteeing stability.
TENAX MULTIMAT R reinforced geomats or TENAX TENWEB geocells,
by means of their high frictional three-dimensional structure,
allow for the retention of a thick layer of topsoil even on steep
Placed directly above the impermeable membrane (or if required,
above a filtering-draining TENAX TNT geocomposite), they are secured
in place either in an anchor trench at the crest of the slope
or secured to a permanent structure using suitable fixing pins.
Once installed, topsoil can be placed, compacted and if required
MULTIMAT R geomats
TENAX HF High Friction geocomposite
TENAX HD High Drainage geocomposites
TENAX ECOMAT biomat
Cerro Maggiore (MI):
Vegetation on slopes
TENAX TENWEB geocells used for soil containment on the slope of a landfill cap