C305 – Eastern Running Tunnels (Limmo Peninsula to Farringdon; Limmo Peninsula to Victoria Dock; Stepney Green to Pudding Mill Lane)

The Crossrail route links the new stations at Paddington, Bond Street, Tottenham Court Road, Farringdon, Liverpool Street and Whitechapel.

The railway divides at Stepney Green, with the southeast spur running underground to Plumstead and then onto Abbey Wood via the Isle of Dogs and the north east spur running underground to Pudding Mill and then onto Shenfield in Essex. All of this adds up to 42km of bored tunnels located below the busy streets of London.

The tunnels will weave their way between existing underground lines, sewers, tunnels and building foundations from station to station at depths of up to 36m.

The scope of the contract comprises 6.2m diameter twin bore tunnels with concrete segment lining which will form part of the running tunnels:

  • Drive Y  8.3km, Limmo Peninsula to Farringdon
  • Drive Z  2.72km, Stepney Green to Pudding Mill Lane
  • Drive G  0.9km, Limmo Peninsula to Royal Victoria Dock

The main drill sites being: Limmo Peninsula, Stepney Green and Pudding Mill Lane.

Contract 305 – Eastern Running Tunnels encompasses construction of the sub-surface section of the Crossrail route. Running eastwards from Farringdon station to Stepney Green the route here bifurcates with one leg heading north eastwards to Pudding Mill Lane and the other south eastwards to Victoria Dock.

The C305 section sees the light of day only at the two portals [Pudding Mill Lane and Victoria Dock]. However, tunnel construction will be serviced from two shafts sunk 50m below ground level; one at Limmo Peninsula, close to Canning Town, the other at Stepney Green.  Both these worksites became operational early last year and will continue to completion of works in 2015.  In 2013 the north eastern leg tunnelling will be serviced from the Pudding Mill Lane portal.

Diaphragm walls to form the 30m diameter main shaft at Limmo Peninsula are now complete and excavation of the shaft itself is about to start.  On reaching the level of the tunnels, horizontal chambers supported by sprayed concrete lining will be dug outwards from the shaft.  The tunnel boring machines [TBMs] will be lowered down the shaft and moved into the chambers for final assembly before starting to advance tunnel excavation itself.  In due course all of the excavated material from the tunnels between Victoria Dock and Farringdon will be brought to the surface at Limmo Peninsula whilst tunnel lining segments will be loaded into the tunnel there from on-site storage.

Meanwhile at Stepney Green, diaphragm walls to form a rectangular shaft will be complete at the start of February 2012 and excavation will then start for top-down construction of the internal floor slabs for the structure.

Each of the worksites provides its own challenges.  Stepney is in a residential area with two schools and a church in close proximity in addition to a City Farm as immediate neighbours.  Environmental controls are of paramount importance in minimising impacts on the local community.  At Limmo Peninsula 65,000m3 of excavated material had to be removed from the worksite before work could start on installing the diaphragm walls. 99% of the excavated material removed was able to be re-cycled which won the 2011 Crossrail Green Line Award for Environmental Performance.

Further worksites will come on stream during 2012 at Chatham Docks, Instone Wharf and Pudding Mill Lane.  Conversion of existing dockside buildings will create a factory for the production of precast concrete tunnel linings and river transportation to Limmo Peninsula. Facilities will be installed at Instone Wharf to load excavated material from the tunnels for river transportation to Wallasea Island whereas significant enabling works are required at Pudding Mill to ensure the protection and monitoring of major Thames Water sewers and the River Lea where the tunnels pass under as they rise to the surface at the portal.

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Healty & Safety


Safety Awards

DSJV has recently been recognised by Crossrail for their approach to health & safety on the C305 projects...

Target Zero

All our employees and partners working on C305 will support our "Target Zero: A State of Mind"
programme.

October 2011

DSJV moves into new premises

DSJV has moved into its new offices in Newham where they will manage the C305 Eastern Running Tunnels Project. The full address is available on our Contact Us page.

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