August 08, 2018
Foamed Concrete in Barking Supplied for TBM Extraction
Barhale Ltd approached CEMEX for a technical fill for Tunnel Boring Machine extraction in Barking at Beckton Sewage Treatment Works.
We recommended Porofoam 900 foamed concrete for the job as the material needed to be dense enough for the TBM to key into during penetration but of a sufficiently low strength to enable it to be extracted with relative ease.
CEMEX technical team recommended Porofoam 900 as the optimum solution. As the TBM moved along the Beckton overflow tunnel Porofoam was placed in the overflow shaft base to a depth sufficient to cover the boring machine ready for when it broke through.