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36 GROUND REINFORCEMENT; HEATING & RENEWABLES


adopted under Section 38 agreements and car parking areas. This can speed up these important aspects of residential develop- ments, ensuring projects are completed on time and as economically as possible. Because the trafficking capacity of pavements incorporating geogrids can be up to six times greater than traditionally- built roads, they can help make roads safer, for longer. This improved performance also reduces longer-term maintenance and repair requirements, reducing disruption to road-users and local residents.


GREENER DEVELOPMENTS


Because geogrids can reduce the overall thickness of working platforms, capping layers and road pavements, they can contribute to the green credentials of a scheme.


Fewer materials are needed and weak and unstable soils can be left in the ground. Geogrid solutions can also use site-won material, including non-standard fill that would otherwise have to be disposed of and replaced with imported material. Not only does this mean construction costs can be lower, but it can also result in fewer lorry movements, reduced embodied


energy and lower CO2 emissions. An added bonus is that there is less disruption to local residents and businesses – a great selling


point to both housebuilders, developers and local authorities.


QUANTIFIABLE BENEFITS


Geogrids bring a wealth of benefits to housing schemes. They have been shown to deliver up to 50 per cent cost savings in road construction and up to 75 per cent savings in reinforced soil wall construction. They can halve aggregate thickness in temporary access roads and working platforms, and cut permanent road pavement thickness by up to 20 per cent.


All of these benefits can be realised by housebuilders if they are willing to engage with the supply chain and are open to alternative ground engineering solutions. These products were ‘innovative’ 30 years ago, but are now well-established ways of reducing ground risk, maximising the returns on land, and delivering much- needed housing faster and more economically than ever before.


Jonathan Cook is senior product manager at Tensar


WWW.HBDONLINE.CO.UK


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