Basement Excavation

Client / Kier Major Projects
Site / Kings Cross R7
Value / £2m
Timescale / 10 weeks


Sanctus were employed to carry out the earthworks and enabling works on Plot R7 at the Kings Cross development in central London. The works were completed within a tight programme on a heavily constrained site on an-all risk lump sum basis.

The works package included;

  • Site Investigation and Remediation Strategy
  • Breaking out of concrete slabs and foundations
  • Construction of upper and lower level piling mats
  • Two phase basement excavation to a maximum depth of 9m bgl
  • Offsite treatment and disposal of 20,000m3 of inert, non-hazardous and hazardous soil
  • 70+ lorry movements per day
  • Piling attendance
  • Service diversions and temporary drainage installation
  • Dewatering and onsite water treatment
  • Environmental and Geotechnical verification testing.