23-CMS Specialist Geotechnical Solutions News 020608

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CMS delivers geotechnical solutions for Tesco distribution centre

Geotechnical specialist, CMS, has specified and supplied its Slope-Guard Type 5 and Bentofix NSP 4900, erosion control and clay lining materials, for two rainwater collection lagoons serving the new £65 million Tesco regional distribution centre near Goole. Constructed by O’Boyle Civil Engineering, the lagoons will collect excess rainwater evacuated from the distribution centre roof.

As the 850,000 square foot depot is built in an ecologically protected area, water evacuation had to be managed using environmentally friendly methods. Two large man-made lagoons were excavated, using a total of 30,000m2 of Bentofix NSP 4900 to line the bottom. Bentofix NSP 4900 is a geosynthetic clay liner that provides a high performance alternative to compacted clay and soil hydraulic barriers in water containment and environmental protection applications.

To facilitate efficient water flow into the lagoons, the sides were built on a medium incline. To protect these slopes from erosion, 30,000m2 of Slope-Guard Type 5 was installed on all elevations. Slope-Guard Type 5 is biodegradable erosion control matting, manufactured from coir matting and straw mixed blanket. It prevents soil loss and slope instability while providing an excellent microclimate for grass seeds to germinate.

Chris O’Boyle, managing director, O’Boyle Civil Engineering, comments: “CMS Limited were able to provide the complete solution for our geotechnical requirements. The materials were quick and easy to install, competitively priced, and most importantly – on-site exactly when we needed them. This was backed up by technical support, which was only a phone call away if we needed it.”

The geotechnical materials supplied by CMS provided a cost effective solution to ensure the lagoons remained an environmentally sound method of water control over time. The construction of Bentofix NSP 4900 delivers superior performance to standard clay lining products, making it ideal for large-scale applications. It consists of a layer of sodium bentonite held between two geotextile layers, mechanically bonded together using a patented needle punching process. The natural sodium bentonite in the material responds to hydration and constriction to form an impermeable layer with virtually unlimited life.

Richard Longbottom, technical director, CMS, concludes: “As the UK’s largest provider of geotechnical solutions to the construction and infrastructure markets, we offer the widest choice of products from a single source. The Tesco project benefited from this as we were able to advise on the most cost effective and high performing materials to meet the specification.”

Email: enquiries@cmslimited.co.uk