LANDSCAPING & EXTERNAL WORKS
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Polypipe in the driving seat for major highways project
olypipe has supplied some of its most innovative sustainable drainage and cable protection solutions as part of a multi-million-pound project to keep one of England’s busiest road junctions moving. Main contractor, Galliford Try, specified a
P
fully engineered water management attenuation tank consisting of Polypipe’s Polystorm-R and Polystorm Inspect, Ridgidrain surface water drainage system, Ridgistorm-XL large diameter piping system and Ridgiduct cable protection, for construction of the new underpass and additional vehicle lanes at the A45/A46 Tollbar End Junction on the outskirts of Coventry. Having successfully used Polypipe’s plastic
piping systems for previous large scale projects, Galliford Try tasked Polypipe with providing a holistic solution that would meet the demands of the client Highways England, whilst ensuring quicker, safer and easier installation for contracting teams working by
the busy highway. Polypipe’s Ridgidrain, and its Ridgistorm-
XL large diameter piping system were utilised to channel the stormwater run-off away from the roadway towards the Polystorm attenuation tank. This then provided a geocellular solution, upgrading the surface water drainage capabilities for the highway. Polypipe worked with Galliford Try
and their designer Arcadis to redesign the solution by removing the specified gabion baskets which were originally to be constructed by hand into a rectangular trough. The gabion baskets would have posed health and safety risks during both installation and post-installation. Polypipe produced a safer alternative included
which a 900mm
RIDGISTORMSeparate modular manifold which linked into the Polystorm-R attenuation tank, to include seven sumps for iltration. The manifold system is connected at various points to the tank, which allowed for
better hydraulic distribution of storm water into the system. Polystorm Inspect were also installed along the full length of the tank to allow for inspection and maintenance ctivities, which can be accessed via the RIDGISTORMSeparate chambers within the manifold. The Polystorm-R geocellular tank, manufactured from recycled material, was designed in accordance with CIRIA C680 guidelines, meets the Specification for Highway Works criteria and is capable of attenuating 3,138m3
of stormwater. Installed
by Keytec Geomembranes Ltd, the tank was wrapped in geomembrane to make the tank water tight.
01509 615100
www.polypipe.com
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