OasisLMS

Abstract: The pile installation at Euston Station was carried out with the full focus on low carbon emission.

Part of the initiatives were to use Low Carbon Guide Walls, where the incorporation of basalt reinforcement replaces traditional steel. The solution significantly reduces embodied carbon and has demonstrable safety benefits including safer handling due to the lightweight nature of the reinforcement and the ability to easily form curves with this new material.

Another big impact provides the use of Low Carbon Concrete. Concrete has been identified as a ‘ carbon hotspot’ for the piling works and ongoing carbon reporting has demonstrated that concrete has the most significant contribution to our carbon footprint. To address this impact, collaboratively works with suppliers to trial Cemfree (zero cement mixes) and high replacement mixes (high proportions of GGBS) have been carried out. The low carbon concrete mix delivers a 45% reduction in the embodied carbon of our main piling concrete at. The concrete mix has been placed in 45m deep permanent piles constructed under polymer support fluid.

In addition, the pile installation was carried out using the world's first electric, grid-powered, large rotary drilling rig eBG33. Instead of a diesel engine, the eBG33 has a powerful electric drive. Thanks to a dedicated on-site sub-station, the machine could operate with zero local emissions and could contribute to considerable CO2 savings. Additionally, significant noise reductions with base carrier noise levels of 50% less, compared to a conventional equipment enabled the neighborhood to stay in their houses during the installation works.

The presentation will explain the construction process and the specific challenges and experiences made under these circumstances.


Keywords: Electric driven drill rig, drilled piles, low carbon concrete

Mr. FRANZ WERNER GERRESSEN; JOHANN KRAXENBERGER

Annual Conference Proceedings