The original project specification included a concrete box culvert, however, following the main contractor’s issues with rising material costs and concerns over the performance of the product in times of high flow water run-off, Polypipe CGU was approached to design a solution capable of storing the required water capacity whilst accommodating difficult site constraints.
Polypipe CGU designed and supplied an intelligently engineered hybrid modular cell solution using its Polystorm and Polystorm Lite products to cope with uneven burial depths on site.
Working closely with the groundwork contractor, W Longs, Polypipe CGU supplied 3,000 cells to provide an attenuation solution to manage surface water run-off from both hard standing and roof areas. Installation guidance was also provided to W Longs’ on-site team.
Following consultation with both the Ministry of Justice and W Longs, Polypipe CGU also designed a manifold system to improve hydraulic performance of the overall attenuation solution.
The Project at RAF Northolt, Cambridgeshire, was part of the £600 million Minstry of Justice Single Living Accommodation Modernisation (SLAM) scheme, designed to deliver living accommodation to Minstry of Justic personnel.
Emma Nicholls, Marketing Manager at Polypipe CGU, said: “We have completed several hybrid SuDS schemes and are delighted to have been involved in this project. By re-engineering the original project specification, we’ve been able to demonstrate our unrivalled technical expertise and design capability, whilst offering a viable solution that has been undertaken with few problems and at a much lower cost than the original specification of concrete. This project is a testament to the adaptability and benefits provided by our Polystorm and Polystorm Lite products.”