characteristics of natural soils and other mineral construction materials will
put limits on the engineering work which can be constructed: this may apply to
the construction process or the structures themselves. Many poor, weak soils
make working with the heavy construction equipment impractical, or the material
available does not meet geotechnical design requirements for final structures.
When construction projects can only be achieved by expensive replacement of the
soil with new material, for example in construction of haul roads, the search
for alternative techniques becomes inevitable. Stabilizing and/or strengthening
soils using chemical binding agents is highly equipment-intensive, and such
methods often have to be ruled out on economic grounds. The aim therefore is to
find a solution which enables construction to continue without the removal of
the soft soils.
A tested and proven option is to use geogrids whose strength and geometry allow
the absorption of shear loads, which destabilize soft soils, and then only
transmit vertical loads to the soft soil. This method can be further optimized
by using geogrids which can absorb high tension forces at low strain.
Another problem arises if very steep slopes have to be constructed for reasons
of space, and their slope angle is greater than the internal friction angle of
the material available. One major challenge here for ecological and financial
reasons, is to use the soils available on site, even though these alone are not
strong enough to complete construction or provide the safety required. These
shortcomings in structural safety calculations can be solved by using
tension-absorbing geogrid reinforcement.
The Enkagrid family of geogrids offers a wide range of cost effective solutions
for stabilizing and reinforcing soil to meet the requirements of construction
projects under a wide range of conditions.
For more information on Enkagrid products and their uses, please go to the
Enkagrid product family.