Over the past year, structural engineers from Expedition Engineering have been working in collaboration with WSP and WilkinsonEyre on the HS2 Old Oak Common station design. We’ve recently completed a major roof optimisation study, which has enabled the team to save over 1,000 tonnes of steelwork; equivalent to a 2,700 tonne reduction in embodied carbon and a cost saving of £7m.
Matthew Botelle, HS2 programme director, said: “By challenging the standard design approach, the WSP-Expedition design team have realised savings in the roof steelwork tonnage that has significantly reduced cost, construction complexity and embodied carbon. This work is a great example of how the latest design thinking and techniques are being used on the HS2 programme to provide best value to the UK taxpayer.”
Expedition’s Dr Pete Winslow, lead structural engineer for the roof, explains:
“As the roof shape is not fully represented in the wind and snow loading design codes, testing was carried out together with specialists RWDI to establish more representative loads; proving them to be less onerous than the code suggests. This, coupled with advanced analysis and optimisation approaches, enabled our team to make a significant improvement over the norm.
It is testament to the integrated team of WSP, Expedition, Wilkinson Eyre, RWDI and HS2 that we’ve been able to make such significant reductions in material quantities whilst maintaining the architectural intent and detail of the station roof”.
Images courtesy of WSP and WilkinsonEyre