Wind farms are traditionally found in remote locations. In many cases, the underlying soil conditions are unfavorable, characterized by soft clay, silt or peat with high groundwater tables.
Learn more about our solutions for the Renaico Wind Farm in the Araucanía Region of Chile.
This presents a particular challenge to the contractor when constructing access roads with heavy vehicle traffic. An even greater test occurs in areas where the wind turbines are located. Heavy lifting equipment, required to position the turbines, exerts high pressures on the underlying soft subgrade.
By incorporating Tensar TriAx Geogrids, a mechanically stabilized layer is created for the haul/access roads and working areas. Construction savings of up to 50% can be realized in the amount of aggregate required. This results in less excavated material needed to be taken away from the site, and less aggregate needed to be imported, placed and compacted.
TriAx® geogrid and the use thereof are protected by U.S. Patent No. 7,001,112.
- Less Aggregate: The latest Giroud-Han design methodology has demonstrated that the required aggregate thickness can be reduced by up to 60% for roads reinforced with Tensar TriAx Geogrids with no loss in performance.
- Increased Speed of Construction: The installation process for geogrids is extremely straightforward. Using less aggregate leads to quicker installation when compared to other solutions that use conventional soil stabilization techniques.
- Avoid Over-excavation: Traditional stabilization often involves over-excavation and disposal of the uppermost subgrade soils.
- Eliminate Uncertainties Associated with Chemical Stabilization: Apart from the obvious environmental concerns, chemical treatment of the subgrade requires that optimum temperatures and dry weather conditions be met. This can lead to delays in the construction process.
- Lower Costs: Using less aggregate with an increased speed of construction yields significant cost savings on wind farm projects. These cost savings increase with greater traffic loads and weaker subsoil conditions.