A fleet of bespoke machines were used in the fit-out of the Elizabeth line's tunnels. Find out more about each of the machines below.
The giant concreting train
The 465 metre long concreting train is a sophisticated mobile underground concrete batching factory. The concreting train played a key role for the Crossrail project in installing the permanent track on the eastern section of the new tunnels.
Dry materials are loaded onto the concreting train which then batches the concrete.
The concreting train was refurbished and brought to the UK from France via the Channel Tunnel in August 2015. It was based at Plumstead and used in the installation of standard track slab.
Concrete pouring took place during the night with restocking and maintenance carried out during the day.
The ability to mix and batch concrete on the move meant the concreting train was able to deliver a high daily output - at peak production it installed over 300 metres of concrete track slab a day.
When the concreting train was not operating in the tunnels it had to be split in two due to its size and located on two of the eight railhead tracks.
Gallery - Crossrail's giant concreting train
A bespoke fleet of four multi-purpose gantries was used to carry over 70,000 sleepers and 57km of rail inside the tunnels as part of the initial sequence of works to build the new tracks.
Each gantry, operated by a single person, ran along the raised curbed sides of the tunnel’s first stage concrete.
After positioning 108 metre long sections of rail along a stretch of tunnel, the gantry then carried and deposited sleepers at carefully measured intervals, before lifting the rail into place on top of them. The track was secured in place using clips, props and jigs before it is welded and the formation concreted into position.
Gallery - Crossrail's multi-purpose gantries
To support permanent track installation in the Elizabeth line tunnels between Royal Oak Portal and Bond Street, a concrete shuttle was used to transport concrete from the temporary railhead at Westbourne Park.
Pre-mixed fibre reinforced concrete from the batching plant was loaded onto the shuttle, delivered into the tunnels and pumped into place.
Gallery - Crossrail's concrete shuttle
A state-of-the-art drilling rig, comprising two machine components, moved through the tunnels drilling more than 250,000 holes in the tunnel lining.
The first machine drilled all the holes that will accommodate brackets for cabling, walkways and fire mains while the second machine drills the holes for overhead power equipment which will power the new Elizabeth line trains.
Gallery - Crossrail's state-of-the-art drilling machine
The Crossrail project used a fleet of construction trains to help deliver sleepers, rails and other materials into the Elizabeth line tunnels.
Manufactured in Germany, this locomotive train is a 500 horsepower, 9.3 metre-long shunting locomotive train, weighing 42 tonnes.