Abstract:
There is increasing demand for geotechnical contractors to commit to carbon reduction, net zero or science
based targets. A lot of focus has therefore been placed on using low carbon materials and low emission rigs.
However, whilst these are ways to help reduce carbon, there is a need to look beyond just substituting
materials and fuels to meet net zero. Using the IEMA carbon hierarchy, there is a need to first look at
eliminating and reducing emissions, before considering substitute materials. For example, in geotechnical
designs, this may mean considering using ground improvement or reducing the number of piles, before
considering using low carbon cements. Equally, for remaining emissions, this hierarchy means considering
carbon negative products to offset emissions, such as ground source heat pumps. This hierarchy can also be
applied throughout geotechnical contractor organisations. For example, considering video conferencing for
meetings, before considering public transport or using an electric vehicle. This article explores the carbon
hierarchy and how it can be applied to all areas of a geotechnical contractor’s business. Only through
embedding this hierarchy across the business can geotechnical contractors achieve the step change required
to meet net zero.