Providing clients with more sustainable foundations solutions doesn’t have to mean greater costs Keller sales director Derek Taylor said at today’s GE Piling and Foundations Conference.
Taylor said that demand for carbon accounting has grown since it first offered it in 2007 and tracking of fuel use on its equipment allows it to produce tenders that compare solutions based on cost and carbon. The company also offers carbon offsetting though a scheme run by JP Morgan and so far six clients have opted to take this option.
To demonstrate the potential savings that carbon analysis offers, Taylor spoke about Keller’s work on foundations for several Olympics sites. According to Taylor, using on site construction and a combination of techniques can offer foundations that are technical better, more sustainable and cheaper.
“The ODA initially called for foundations for the main stadium to be formed by 20m long precast concrete piles founded in the Terrace Gravels,” he said. “The need for joints and the cost of transporting the piles from casting factories in the Midlands meant the solution would cost £4.5M and have a high carbon footprint.
“We offered a combination of driven cast insitu and CFA piles with vibro stone columns (VSC) to meet specific loading demands which were up to 1000kN in places. This alternative used locally sourced materials, was three weeks quicker and reduced costs by £1M.”
Keller also installed VSC foundations for the temporary basketball stadium to help meet the ODA’s demands that the foundations would not impact on future development. “Ground improvement techniques are the most sustainable option,” said Taylor.