The development of a single storey basement extension to an occupied listed building in central London. RKD carried out the full geotechnical and structural design. The project included construction of a new piled wall in restricted headroom and hand dug caisson piles, in addition to extensive temporary works to support the existing building while excavating the new basement and until completion of the new raft foundation, RC columns and RC liner walls.
Battersea Power Station
Since 2014 RKD have provided extensive temporary works design for re-development of Battersea Power Station. Scope included a number of basement propping schemes, retention of the multiple facades, 20+ tower crane foundations, rolling protection/access decks to the Turbine Halls (using the historic gantry crane rails) and assessments of the existing and new structures during demolition and re-construction. The 45m high southern façade of the Boiler House was temporarily supported using Pynford Beams to demolish the bottom section and install new permanent support steelwork.
RKD provided design of the site wide secant pile wall and basement propping schemes – including a combination of raking props to thrust blocks, flying shores and ground anchors. RKD provided ground movement assessment for Party Wall and Thames Water approvals.
The Scalpel (52 Lime Street)
RKD provided design of temporary works for demolition and new-construction, including the basement propping scheme (double and triple basements, bottom up and partial top-down construction), excavation gantry, welfare gantry and crane foundations and ties. Two of the tower cranes were conventional piled foundations, the third crane was supported on a ballasted cruciform on plunge piles above the top-down basement and the fourth crane was supported on a grillage projecting out from the building at Level 13. Temporary works were also provided to support a column carrying 21 stories of the new structure prior to completing its new foundation.
Leicester Square Hotel
RKD carried out the geotechnical design of the secant pile wall for the 24m deep basement and structural design of the propping system, along with excavation gantries for the 50T machine grabs.
We undertook structural and geotechnical design for the support of the retained façade and basement propping scheme.
At South Colonnade, Canary Wharf, we carried out the design of two crane grillages supported on the superstructure and undertook building stability assessments for the construction phasing – extension of the existing building and progressive removal of historic bracing.