IKEA Properties Investment Ltd
A new IKEA store in the heart of the London Borough of Greenwich. The IKEA store is a 3-storey building with a large roof garden. The building has a large storage area which is served by a Concrete Service Yard with 6 Dock Levellers for HGV loading/unloading. For water quality benefits, a green roof was adopted to treat storm water at the source with the remaining roof drainage picked up via a siphonic system. A rainwater harvesting tank was installed in the below ground network to reduce the overall water consumption of the store. The new store is the first retail unit in the UK to achieve a BREEAM rating of over 90% and therefore be awarded with Outstanding BREEAM certification.
BWB were responsible for the civils design which consists of drainage, external levels, earthworks, pavement and service yard. The drainage strategy included green roofs with siphonic drainage, a rainwater harvesting system, petrol interceptors and on-site attenuation. The earthworks were modelled with Civil 3D to assess the quantities of materials to be re-used or taken off site.
There was limited external space as most of the site is taken up by the IKEA building with the remaining areas used for landscaping and a service yard. We produced a swept path analysis with rigid trucks and articulated vehicles to maximise the number of dock levellers. We also led the coordination of new drainage with existing services on and off site. With limited opportunity to use infiltration systems, the drainage was restricted and attenuated in geo-cellular storage tanks for the 100 year + 20% climate change storm event.
We led conversations with Thames Water to avoid the need for a buildover agreement and produced technical drawings to demonstrate the development proposals had no impact on the existing Thames Water assets.