A465 Widening: Brynmawr Bank


Carillion Civil Engineering





The realignment of the A465 Heads of the Valley Road created an extensive steep cutting at Brynmawr. Our TEI Hem 560 drill masts used in conjunction with 35 tonne excavators and dipper extensions allowed us to access anchor positions up to 11.5m above road level.

Quantum’s solution involved:

  • Soil Nailing/Anchoring: Installation of 662 Dywidag R32 self drilling soil nails with 90mm drill bits using our excavator mounted TEI Hem550 drilling mast. In addition a quantity of R38 anchors were installed to facilitate grout injection into areas of fractured ground and voids.
  • Mesh Facing: 3300 sq. metres of Geobrugg TECCO high tensile steel rock netting.