NETWORK /
21
/ NOVEMBER 2018
THE TUNNEL
UNDER THE
THAMES
THE PROJECT IN NUMBERS
£18 million
Total cost of the Tunnel Under the Thames
project.
330m
Length of tunnel.
4,500m
3
The amount of material excavated from
the tunnel and shafts.
30m
The depth of the shafts installed at both the
Royal Hospital Chelsea and Battersea Park.
24
The number of days it took for the Tunnel
Boring Machine (TBM) to complete its tun-
nel drive under the River Thames.
18"
The diameter of the new intermediate
pressure steel pipeline installed within the
tunnel.
1. 7.5m diameter north shaft construction utilising a segmental ring
and cassion jacks to sink the shaft into the ground.
2. Aerial view of north shaft construction site with Royal Chelsea Hospital in the background.
4. Aerial view of TBM ahead of launch.
3. Tunnel boring machine (TBM)
breakthrough in 6.0m diameter south shaft,
Battersea Park.
5. Pictured from left to right: Tom Mullaney
– Chelsea Pensioner; Stuart Donaldson –
engineering manager, Cadent; Amanda Lord,
infirmary business manager at the Royal
Chelsea Hospital who Cadent named the
TBM after; Matthew Behan – CEO, Barhale
(tunnelling subcontractor); Andrew Hejdner –
project manager, Cadent.
6. Map showing route of the tunnel.
