Reduced carbon footprint through design changes

There have been a significant number of changes to design that have reduced the amount of steel and concrete used on the Bank Station Capacity Upgrade (BSCU) Project.

To identify the benefits in terms of carbon savings, Dragados looked to BIM to help calculate reductions in carbon.

Reductions in weight and volumes of steel and concrete were identified using BIM to easily and accurately calculate the reductions. From these reductions, using standardised carbon coefficients, it is simple to calculate the embodied carbon.

Significant CO2 (4,500 tonnes/ 34.4%) and material savings were identified, particularly relating to changes to tunnel lining thickness and moving to a sprayed concrete lined lift shaft design over a more standard piled box design.

The observed environmental benefits include:

  • Demonstrate and promote the benefits of design changes in a measure other than cost savings.
  • Make use of BIM to improve accuracy and speed at which data can be gathered.
  • Provide a clear and simple method to show impacts of changes to the design.

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Entry submitted by Dragados


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