➔ Name : HIGH SPEED 2
➔ Country : United Kingdom
➔ City : London
➔ Year : 2022
➔ Diameter : 2x ɸ9,84m
➔ Construction company : Skanska, Costain, Strabag
“Skanska Costain Strabag joint venture, is delivering full detailed design and construction of Phase One of the UK’s new high-speed railway in the southern section of the overall High Speed Two (HS2) project.
The Project consists of 2 sections (S1 and S2) with a total of 7 main tunnels excavated with EPB machines.
S1 Euston tunnels: Ø: 8,54m L: 14.336m 🡪 2 TBMs
S1 Atlas road tunnel: Ø: 7,05m L: 950m 🡪 1 TBM
S2 Northolt tunnels East: Ø: 9,84m L: 11.024m 🡪 2 TBMs
S2 Northolt tunnels West: Ø: 9,84m L: 15.751m 🡪 2 TBMs
We can divide the 2 main drives depending on main characteristic grounds: London clay and Lambeth/Chalk.
TNL18 is involved from the very beginning of the Project with soil conditioning, using the foaming agents ACTISOYL 20W, ACTISOYL CC, ACTISOYL 100 and the polymer ACTI+ WW.
We also were involved in hyperbaric works with cake hardener ACTIEDGE. During the start-up of the TBMs, technical service offered by TNL18 was essential for the good performance of the TBMs.