Hagshaw Hill Wind Farm
Tensar’s innovative one-layer geogrid design helped support access roads on a site with low strength sub-grade soil and deep areas of peat. The use of one-layer not only meant construction time was halved, but there was also a 34% reduction in aggregate thickness, delivering significant cost savings.
Benefits
- Construction time halved
- 34% reduction in aggregate thickness.
- Single-layer Tensar geogrid savings on initial two-layer project costs.
- Tensar geogrid aperture is compatible with available coarsely-graded aggregate.
The contractor at Hagshaw Wind Farm, Wills Brothers needed to construct permanent unpaved access roads on a site which had low strength subgrade soils and areas of deep peat. They were familiar with geogrids and obtained a design from a supplier.
This design required two layers of geogrid. They needed a lower cost solution and a product that would enable use of the available coarse aggregate.
Tensar provided a solution which required just one layer of Tensar H-Series geogrid and a reduced aggregate layer thickness, compared to two geogrid layers in the competition solution. Construction time was halved and, combined with need for less aggregate, significant cost savings were delivered across the project. Tensar’s design used the LAAMS method, which is a powerful and scientifically rigorous design approach, derived from fundamental and well-established engineering principles.
