PROJECT: Recycled Water Integration Program
LOCATION: Bomaderry NSW
CLIENT: UEA
PRODUCT: E’Grid® 3030GT
THE REQUIREMENT
Reinforcement for access roads against vehicular damage. Leading trenchless drilling contractor, UEA, needed to create two 50x50m hard pads and a 3.5x350m temporary access track for vacuum trucks and heavy contract vehicles at each of the project’s HDD (Horizontal Directional Drilling) section entry points.
THE CHALLENGES
Initially the client considered using a geotextile. However, given the relatively poor CBR, they realised more reinforcement was needed to effectively spread the load. The compressed time-frame of the project also compelled them to consider ways in which they could more efficiently mobilise and demobilise the site.
THE SOLUTION
E’GRID® 3030GT
is a geocomposite, comprising of a polypropylene biaxial geogrid
possessing an Ultimate Tensile Strength of 30kN/m in both directions
bonded to a non-woven RMS R63 strength Class A geotextile. Based on
ground conditions, predicted traffic and axle load modelling Polyfabrics
produced a preliminary design concept (see Image 1) to illustrate the
efficiency of the product in providing separation, filtration and
re-enforcement.
| Image 1 – Preliminary Design Concept |
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E’GRID® 3030GT also requires minimal subgrade preparation and can be placed directly on existing natural ground enabling rapid deployment and site set-up. E’GRID® 3030GT can also provide further benefits during demobilisation as the construction of the product assists with fill removal.