• A collection of Canary Wharf Crossrail Stationimages
  • A collection of Canary Wharf Crossrail Stationimages
  • A collection of Canary Wharf Crossrail Stationimages

The Elizabeth Line (Crossrail) is a new rail line which will run from Reading and Heathrow in the west, through 21 km of new twin-bore tunnels and seven new underground stations under central London to Shenfield and Abbey Wood in the east. In 2007 Canary Wharf Group agreed to build the new station at Canary Wharf on the South East leg of the route for a fixed price of £500m and contribute 30% of the cost.

The Elizabeth Line will provide crucial links to Heathrow Airport, the City, West End and the Thames Gateway. It will provide additional rail capacity to support 200,000 jobs on the Isle of Dogs. It will reduce the travel time between Canary Wharf and key transport interchanges such as Liverpool Street to 7 minutes, Farringdon to 9 minutes, Bond Street to 13 minutes and Heathrow Airport to 39 minutes

www.crossrail.co.uk

The Station is being constructed to shell & core specification under a design & construct contract with Canary Wharf taking all the design, cost and programme risk.

The box structure which forms the enclosure of the station has been built in the 10m deep North Dock of West India Quay and extends some 18m below the bed of the dock. It is also adjacent to five major office buildings including the HSBC tower which is 45 storeys high.

The original temporary works proposals were challenged by CWCL using our extensive knowledge of constructing buildings and infrastructure in London Docklands over the past 24 years. As well as a more efficient station design, this resulted in far less intrusive works in the docks and considerably reduced environmental impacts. The station box is still 256m long making it longer than the height of One Canada Square which, until recently, was the United Kingdom’s tallest office building.

To enable construction of the station box, 296 tubular steel piles measuring 18.5 metres long and 1.2 metres diameter have been hydraulically driven into the dock floor using Giken Piling machines, which are virtually silent and produce no vibrations that could disturb neighbours.

Construction commenced with the relocation of dock silt in January 2009 followed by the formal commencement of the piling for the coffer dam in May 2009. A top down method of construction was adopted so that the potential for ground movements was minimised and the plan area of the worksite was kept clear for the piling works and subsequent activities.

KEY POINTS OF INTEREST

• Giken test piles (to prove programme (i.e. 3 piles per day) February 2008.
• Giken rigs ordered from Japan in October 2008, to secure supply of 1200 mm diameter rigs.
• Revised design saved 45m of station length or 22% by volume.
• Use of a single skin cofferdam reduced the footprint of temporary works on the docks by approx 70%.
• 71 tension piles installed from the dock bed to prevent long term buoyancy of the station box.
• 98,000,000 litres of water (equivalent of 40 Olympic swimming pools) removed from within the cofferdam to reveal the dock bed for the piling mat and the ceiling of the station Ticket Hall.
• Use of barges to remove spoil saved approximately 29,000 truck movements.
• The station box ready in March 2012, five months ahead of schedule, to receive the Tunnel Boring Machines which were launched from Limmo Peninsula (1.7km east ) in late 2012.
• CWCL are building the station to Shell & Core stage with Crossrail responsible for installing the Railway and Linewide systems between mid 2015 and mid 2018.
• Fit-out activities by CWCL commenced in April 2012 with blockwork and services, whilst the above ground elements were completed.
• Platforms formed of 580 pre-cast units, with an average weight of 3.5tonnes.
• Feature roof over 300m long made up of 1,414 glulam (timber glued, laminated) beams and 780 ETFE cushions.
PROJECT TIMELINE
October 2007: Heads of Terms signed with Government and Crossrail
July 2008: Crossrail Act become law authorising the construction and operation of the new railway
December 2008: Development Agreement signed that confirmed arrangements for CWG to design & build the station box
May 2009: Formal commencement of construction – first pile placed by Mayor of London, Boris Johnson
December 2009: Cofferdam and temporary construction deck complete
February/March 2010: 98 million litres of water removed from dock
July 2010: Piling complete
June 2011: Last material removed from the base slab excavation
March 2012: Crossrail take over Level -6 of station to prepare for arrival and transit of tunnel boring machines
May 2012: Commencement of M&E installation
June 2012: Commencement of construction of the Over Site Development (OSD)
November 2012: First delivery of the 40metre-long escalators linking the Promenade (Level -1) to the Ticket Hall (Level -4)
December 2012: Completion of main concrete structural works including the OSD
February 2013: Works progress at Adams Place with daily deliveries of covered walkway sections, and paving installation on the plaza
May-June 2013: Arrival of Crossrail’s Tunnel Boring Machines
September 2013: Crossrail TBMs leave the station box & Roof construction commences
October 2013: Start of pre-cast concrete platform construction
December 2013: Delivery of the first of the 9 ‘low rise’ escalators between Ticket Hall and Platform
March 2014: Last structural element of the station roof is fitted
June 2014: Roof enclosure is complete
June 2014: Upper Bank Street bridge and Adams Place are opened to pedestrian and vehicular traffic
August 2014: The first tree is planted in the roof garden
September 2014: Removal of temporary construction deck and piling for North Quay promenade commences
January 2015: Fit out of retail units in Crossrail Place commences
May 2015: Crossrail Place and Roof Garden opens to the public
June 2015: Stations systems go live in preparation for commissioning and integrated testing
September 2015: Practical Completion of station and hand over to Crossrail