Subgrade Stabilisation

Subgrade Stabilisation

Solve your soft soil problem

All above-ground infrastructure starts at formation level, and below that is the subgrade; the existing soil whose properties will determine what foundation is needed for the works. Working on weak or variable ground usually presents considerable construction challenges. But Tensar’s technology and know-how in ground stabilisation not only improves performance but is proven to reduce costs and the environmental impact of subgrade improvement too. 

The Tensar approach is to construct a mechanically stabilise layer to protect the subgrade during construction and improve bearing capacity to support the structure above. Compared to traditional capping layer or subbase designs, the Tensar subgrade stabilisation solution can reduce aggregate volumes by up to 50% 

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The Benefits

Reducing layer thickness: capping and subbase layers can be reduced by up to 50% with no performance loss, saving on materials and excavation. 

Reducing construction carbon emissions: by up to 50% 

Increasing life: a mechanically stabilised layer incorporating Tensar geogrid can extend service life of unpaved roads by a factor of three or more, reducing long-term maintenance costs by up to 50% 

Increasing bearing capacity: the load spreading capability of a mechanically stabilised layer incorporating Tensar geogrid can increase the bearing capacity of working platforms for heavy-duty plant such as cranes and piling rigs. 

Controlling differential settlement: over highly variable ground conditions, soil stabilisation using Tensar geogrids can help even-out variable ground support from a foundation soil. 

Capping weak deposits: Tensar geogrids promote the safe placement and installation of cover layers of soil in the capping of sludge lagoons and industrial waste deposits. 

Spanning voids: a stiffened raft can be constructed, using Tensar geogrids, to span underlying voids that may develop in, for example, mining areas or those prone to dissolution features. This short-term application will highlight the presence of void formation prior to their permanent treatment. 



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How Tensar can Help

For more than 30 years, Tensar’s innovative ground stabilisation solutions have proven ideal for many kinds of construction and subgrade improvement projects, including paved and unpaved roads, car parks, airfields, heavy duty pavements (such as container ports) and working platforms. A full range of case studies and brochures is available.  

We also offer full technical support including expert advice, specifications, drawings, certified designs and details of pricing, and we regularly run free ground stabilisation workshops in many countries throughout the year. To find out more or get in touch with us here. 


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Tensar Design & Software

Tensar has developed unique design methods and software to enable the benefit of Tensar mechanically stabilised layers to be realised. Based on full-scale trafficking testing backed up by years of on-site experience, Tensars subgrade stabilisation design methods and solutions are widely accepted and utilised worldwide.   



Design with confidence, from anywhere.

The TensarPave design program allows the design engineer to rapidly produce pavement designs, for both paved and unpaved roads, using Tensar geogrids to stabilise the unbound layers in order to maximise the costs benefits that can be attained by reducing the pavement thickness.

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