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Product by Category > Geogrids > Combigrid® Composite Geogrid


Use & Purposes

  • Access Road Construction
  • Crane & Rig Platforms
  • Pavement Support

Highlights

  • Ease of Product Handling
  • Geogrid Interaction Characteristics
  • Geogrid Strain Characteristics
  • High-flow Geotextile For Positive Separation
  • Wide Roll Width

General Information

Geogrids are polymeric products formed by joining intersecting ribs. They have large open spaces also known as “apertures”. The directions of the ribs are referred to as machine direction (md), orientated in the direction of the manufacturing process or cross machine direction (cmd) perpendicular to the machine direction ribs. Geogrids are mainly made from poly – meric materials, typically polypropylene (PP), high density polyethylene (HDPE) and polyester (PET).

Product Information

Combigrid® is a flat composite geogrid from the Secugrid® product range. Incorporated into the geogrid construction is a non woven geotextile component for specific applications where reinforcement of problematic soils is required combined with the additional functions of separation and filtration.  This combination provides reinforcement stabilisation, filtration, separation and drainage in a single product.  The unique manufacturing process produces structured, high strength, monolithic, pre-stressed polypropylene or polyester bars with a continuous molecular structure. The extraordinary high extensional stiffness of Combigrid® efficiently reduces deformations in the subgrade which extends the service life of modern infrastructure.

Combigrid® is a multifunctional geogrid and is particularly suited for use on weak subgrades (CBR? 3) where the benefit of reinforcement is provided by the geogrid whilst the non woven geotextile component provides a positive separation and filtration function.

Continuous improvement of the manufacturing process, stringent quality control in raw material selection and expert engineering support ensure safe and economical constructions.

Benefits of Combigrid®:

  • Reinforcement/stabilisation, filtration, separation, and drainage in just one product
  • Immediate interlock with fill material (no construction-related strain)
  • Excellent stress strain behaviour (high tensile stiffness)
  • High radial stiffness and high cyclic tensile stiffness
  • Robust against installation damage and chemical and biological attack

Combigrid® soil reinforcement applications:

  • Base and sub-base course stabilisation and reinforcement
  • Basal reinforcement for embankments
  • Load transfer platforms over piles (LTP)
  • Bridging of mining voids and sinkholes
  • Reinforced foundations
  • Airport runways and graded portions
  • Working platforms
  • Pipe trenches
  • Lagoons/Tailing ponds

Secucalc Software

To assist you in your design, this software has been designed to allow a generic calculation of aggregate base material in unreinforced and Secugrid®, reinforced applications, such as under roadways, access/haul roads, parking lots or similar applications. Secugrid® geogrid reinforcement extends project service life, improves performance, reduces excavation, and lowers overall costs. SecuCalc 2.2 is based on test trials and 30+ years of engineering knowledge. For further information click here:



Case Study

Combigrid® – Harvey Norman Platform

In 2011, it was planned to build granular piling rig access platforms to facilitate the installation of piles for support of the new Harvey Norman bulky goods project in Maroochydore in Australia to increase the low subgrade strength and to provide sufficient bearing capacity for the imposed loads of the cranes.

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