The last segment of Crossrail tunnel was completed at the project's purpose-built factory in Chatham in July.
The 110,000 tunnel segments manufactured at the Kent facility for Europe's largest infrastructure project will line twin tunnels for the between east London to Farringdon, covering a total distance of 12km.
At peak production, the factory employed 120 people and made 330 segments, each one weighing nearly three-and-a-half tonnes, every day.
Finished pieces were delivered by river, saving an estimated 10,000 lorry trips between Kent and London. The remainder of the 250,000 pieces were made at units in Old Oak Common and Ireland. Crossrail is due to start running in 2018.