Secugrid®

Geogrid for soil reinforcement

SECUGRID® Geogrids 2019-05-31T14:03:00+00:00

SECUGRID® Geogrids

A structurally sound and stable geogrid for soil reinforcement. Secugrid® geogrids are manufactured of extruded and drawn bars, laid and welded solid together.

Secugrid® geogrids – more than 20 years experience on reinforcement applications.

Secugrid® geogrids benefit from more than 20 years of NAUE‘s experience on reinforcement applications. Permanent improvement of the unique production process, the quality of raw materials and the en- gineering support ensure a safe and economic construction.

Secugrid® geogrids exemplify how geosynthetics perform best: by interacting with the soil aggregate to create something stronger or more secure.

The Advantages of Secugrid® geogrids

  • Very good stress strain behavior (PET and PP)
  • High tensile stiffness
  • Strong torsional rigidity
  • Low creep tendency (especially PET)
  • Robust against installation damage, chemical, and biological attack
  • High (cyclic) tensile stiffness
  • Biaxial geogrid strengths up to 140 kN/m
  • Uniaxial geogrid strength up to 500 kN/m
  • BBA-certified products (PET)
  • All products available as Combigrid® (composite product of Secutex® non- woven firmly integrated between the Secugrid® bars)
  • Quick and easy to install due to 4.75m wide rolls

Secugrid® Geogrid Soil Stabilisation & Reinforcement Applications:

  • Base course stabilisation & reinforcement
  • Retaining walls and slopes
  • Bridge abutments
  • Veneer reinforcement
  • Basal reinforcement for embankments
  • Load transfer platforms over piles
  • Bridging of mining voids and sinkholes
  • Reinforced foundations
  • Airport runways and graded portions
  • Working platforms, crane hardstandings
  • Pipe trenches

Secugrid® geogrids for Soil stabilisation and Soil Reinforcement

Soil stabilisation and soil reinforcement is necessary in many applications to make constructions work. For example geogrid reinforcement supports granular base courses in windfarms used for highly trafficked access roads and heavily loaded crane platforms. Geogrid reinforcement enables the construction of steep and tall retaining walls & slopes, embankments on soft soil, load transfer platforms on piles, traffic routes on weak soil: reinforcement makes the infrastructure more achievable. Importantly, the selection of a geogrid reinforcement is often how the engineering becomes safer, more economical, more efficient, longer lasting and more sustainable.

Geogrids absorb stresses by interacting (friction and interlocking) with the surrounding soil to make earth structures stronger and more durable against applied loads. But, as highly engineered products their polymeric composition, manufacturing method, stress-strain behaviour (stiffness), and other product characteristics determine their suitability for a design.

Secugrid® geogrids utilise first quality raw materials for highly-oriented polypropylene or polyester flat bars that are uniformly extruded and drawn to achieve a high modulus and high strength at low strain levels. Enhanced by NAUE’s patented welding technology, Secugrid® provides a structurally sound and stable geogrid for long-term performance in road and railway base reinforcement, retaining walls and slopes, veneer reinforcement, embankments, load transfer platforms over piles, and other challenging applications.

Secugrid® Geogrids Stress/Strain Behaviour

Mobilised shear stress in granular soils is substantially reduced when comparatively small axial strains (<2%) are exceeded. Geogrids reduce deformation and increase the stability, safety and serviceability of soil structures. The stress-strain behaviour of geogrid reinforcement influences the available strength at low strains; thus, reinforcement reduces rutting, bulging and crack formation, and other mechanisms of failure within roads, composite structures, and other reinforced soil layers and masses. Secugrid® achieves a high modulus and high tensile strength at low strains, as well as exhibit low creep tendency. This is essential for safe, economical durable engineering work and high serviceability.

Secugrid® Geogrids and Interlocking

Secugrid® absorbs tensile forces induced into the soil and distributes the stresses via its flat, stiff bars. This transfer of stresses takes place by two distinct mechanisms: interlock of the granular soil with the grid apertures (which physically restrain lateral movement of the granular material) and friction between the soil and the textured Secugrid® bars.

The Secugrid® apertures allow for strike-through of the cover soil material which then interlocks with the ribs (flat bars) providing confinement of the overlying granular/soil material due to the stiffness and strength of the ribs. Furthermore the high torsional rigidity — an indicator of junction efficiency — provides the essential durability for long- term interlocking performance. The combined effect of the interlocked aggregate and the high tensile stiffness of the geogrid minimises soil deformation and ensures the integrity of the reinforced structure.

Secugrid® Geogrigs are robust

Secugrid® is a very robust geogrid, perfectly suited for soil reinforcement applications. The homogeneous flat bars in combination with high-quality raw materials ensure long-term durability and resistance not just to chemical/biological attack but to installation damage, which is an important factor in a geogrid beginning its engineered service life in optimal condition. The exposed surface area of Secugrid® is less than that of geogrids made from thin multifilament yarns. This engineering advance increases the robustness of Secugrid® geogrids for suitability in roads, railways, walls, construction pads, veneer stabilisation, and many other challenging reinforcement designs. (See also SPRAGUE et al., Geosynthetics ’99, for a comparative analysis of robustness on geogrid longevity.)

An optimised geogrid product range for effective application solutions:

Secugrid® is a structurally sound and stable geogrid for soil reinforcement, manufactured of extruded and drawn polypropylene (PP) or polyester (PET) pre-stressed bars with a continuous molecular structure, laid and welded solid together. The welding process that strongly joins the longitudinal and transverse reinforcement bars creates a firm, inherently rigid geogrid for use in base course reinforcement. Secugrid® geogrids achieve extraordinary high strengths at low strains.

Secugrid® Q is a biaxial geogrid that exhibits the same strength in both the machine and cross-machine direction. Secugrid® Q products provide a structurally sound and biaxial stable geogrid for long-term performance in road and railway base reinforcement, embankments, load transfer platforms over piles, and other challenging applications, where multi-axial strength transfer is required.

Secugrid® R is a uniaxial geogrid that exhibits the primary strength in the machine direction with minimal strength in the cross-machine direction, enough to maintain the aperture structure. Secugrid® R products provide a structurally sound and uniaxial stable geogrid for long-term performance in mechanically stabilised earth (MSE) walls, veneer reinforcement , segmental retaining walls (SRW), basal reinforced embankments, load transfer platforms over piles, bridging of mining voids and sinkholes, construction over soft soils and other soil reinforcement applications where uniaxial strength transfer is required.

Secugrid® HS is a uniaxial geogrid that exhibits the primary strength in the machine direction with the ability to mobilize high tensile forces at low strains. Secugrid® HS products provide a structurally sound and uniaxial stable geogrid for long-term performance in mechanically stabilised earth (MSE) walls, segmental retaining walls (SRW), veneer reinforcement , basal reinforced embankments, load transfer platforms over piles, bridging of mining voids and sinkholes, construction over soft soil and other demanding soil reinforcement applications where extraordinary high uniaxial strength is required.

More about Secugrid® HS

Combigrid® is a composite reinforcement solution that embeds a Secutex® nonwoven geotextile within a Secugrid® geogrid. This provides reinforcement, filtration, separation and drainage in a single composite product. The geogrid-nonwoven geotextile geocomposite is primarily used on soft soils with low bearing capacity, such as with unbound, dynamically loaded layers that require filtration and separation support, such as in base and sub-base reinforcement for roads, railways, storage yards, container terminals, temporary working platforms, airport runways, sludge lagoons and tailings ponds.

More about Combigrid®

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Geogrid Secugrid® for Base Course Reinforcement and stabilisation - product picture

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