Contract Summary
Salvage of hard landscaping materials, limited demolition & alterations (of RC and Brickwork elements), groundworks including steel sheet piling, underpinning, reduce level dig and installation of temporary propping.
Construction of a three storey underground concrete frame including all waterproofing & drainage systems. Reinstatement of existing hard landscaping. Including macadam, York-stone paving and granite setts.
Realtime summary of work scope:
- Sheet piling to basement
- Underpinning to the existing foundations. Due to the depth these underpins were constructed in three vertical stages.
- Installation to two levels of temporary works as bulk excavation.
- Forming new basement reinforced concrete slab/pile caps and lift pits.
- Basement drainage and new pumping chambers.
- Forming new opening between the new structure and the existing halls.
- Reinforced concrete radius walls and columns from Basement 2 to ground floor.
- Basement waterproofing installed to a Grade 3 specification combining a Type A & B system to BS 8103:2020.
- Reinforcement concrete in-situ concrete stairs.
- Reinstatement of existing hard landscaping York stone, granite setts and macadam.
Contract in Brief
Market Sector: Commercial
Scope of Works: SW Basement Works
Main Contractor: Sir Robert McAlpine
Engineer: Conisbee
Architect: BDP
Duration: 80 Weeks
Value: £6.3m
Contract Start Date: May 2017