Location: Canary Wharf, UK
Client: Tarmac Bachy JV
RMD Kwikform provided invaluable support to the Jubilee Line extension for the London Underground at Canary Wharf, East London, UK.
RMD Kwikform were involved with the project since the contract was let to the Tarmac Bachy JV, and helped during the initial design stages in the selection of a suitable concept to meet the formwork requirements.
RMD Kwikform's 80kN Rapidshor support system was assembled in 20 and 30m sections for the ticket hall slab. The system included Superslim soldier portal arrangements, which allow for the lower sections of the steel frames to be open, thereby providing easy access for workers working at base level. It also provided a heavier leg load than other systems, was easier to install and required fewer braces.
The perimeter wall was constructed using specially designed 24m long mobile gantries assembled from RMD Kwikform's Superslim Soldiers and KD panels.
The roof features a curved vaulted ceiling, which varies from 1.2 - 3.0m thick. For this, RMD Kwikform supplied 2 sets of Megashor shoring on a 24m x 30m wide travelling gantry, with RMD Kwikform special steel soffit forms.
Permanent mid support to the ticket hall slab and roof along the station end line was provided by 17 elliptical reinforced concrete columns, 20m high arranged at 12m intervals, cast using RMD Kwikform special forms.
As part of the ongoing commitment to the project, RMD Kwikform had a designer working full time on site to help with the day to day enquiries and design issues. The site engineer was fully supported by the technical department at RMD Kwikform's head office.
The placing of the formwork and other equipment on site was performed by a fleet of seven tower cranes, which overlaped to cope with the accelerated programme. The cranes included two telescopic hydraulic jib cranes mounted on tower cranes. An 800 ft crane was also employed to place the ticket hall level slab reinforcement beams and a 65 tonne steel column.
Passenger access to the station is via two large glass domed entrances, each measuring 24m wide x 30m long. Each comprises of curved glass on top of steel arches, founded on a concrete ring beam, formed using timber shutters, and were supported by RMD Kwikform Megashor shoring.