Delivering nationally important high speed rail infrastructure

Our teams of experienced engineers are working with our joint venture (JV) and supply chain partners to deliver the UK’s new high speed rail infrastructure. The new high speed railway will improve connections across the UK and is expected to carry more than 300,000 passengers a day when fully operational.

Credit: HS2 Ltd

In total there are four main works civils JVs delivering HS2 Phase One, which will see a new high speed railway linking London Euston to Birmingham. Working collaboratively as the Skanska Costain STRABAG JV, we’re delivering 26 miles of tunnels between Euston and West Ruislip, as well as numerous viaducts, bridges and embankments.

Between 2016 and 2022 we delivered, as the Costain Skanska JV, a complex programme of enabling works. The team achieved significant demolition, site clearance and compound build packages to prepare parts of London and the Euston area in particular for the main works.

Our Cementation Skanska business is also delivering ground engineering and innovative piling solutions that will support the new HS2 London terminus at Euston Station.

HS2 Main Works

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As the Skanska Costain STRABAG JV, we're undertaking the full detailed design and construction of the London tunnels section for HS2 Phase One.

We’re building tunnels 13 miles long and up to 50 metres deep from the London terminus at Euston station to West Ruislip.

Our JV teams are working on sites at Euston, Old Oak Common and West Ruislip and employ around 4,800 people, including supply chain. This includes people from local communities, with more than 300 brought in through training and employment schemes that have helped those who were previously homeless, long-term unemployed or vulnerable for other reasons.

About HS2 Main Works


HS2 Enabling Works

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Working in collaboration as the Costain Skanska JV, our teams have been delivering a complex programme of enabling works on the southern section of HS2.

This complex programme of works stretches from Euston to Northolt in Greater London and includes:

- The biggest archaeological exhumation programme in Europe
- The installation of secondary glazing to 1,300 properties
- Demolition of 82 buildings and 2 cranes
- An array of physical and ecological surveys, design, and site clearance
- Industry leading legacy, environment, and health and safety initiatives

At its peak the joint venture team employed over 600 employees and 1,700 operatives. Our work has been delivered safely, in one of the busiest cities in the world, alongside a railway station that supports 145,000 people a day and semi-rural communities. The enabling works programme is due for completion in 2022. 


Ground engineering solutions

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Skanska’s specialist Cementation team is delivering a programme of complex ground engineering and piling solutions in the London area for HS2 Phase One.

Skanska’s specialist Cementation team has delivered a programme of complex ground engineering and piling solutions in the London area for HS2 Phase One.

This included work awarded by the Skanska Costain STRABAG JV on behalf of HS2 to construct a total of 435 piles. The primary works were for bored pile retaining walls that will form the portal for the running line tunnels to be constructed between West Ruislip and Old Oak Common. A total of 318 large diameter 1200mm and 1500mm rotary bored piles were installed, at depths averaging 38 metres. The Area West Piling Phase One works also included the installation of 117 large diameter 1180mm rotary bored piles for two bridge structures. These structures will take the new HS2 lines over the River Pinn and Breakspear Road South near Ickenham.

In Area East, Cementation Skanska has also been appointed to create one of the largest current open-cut retaining boxes in Europe – equivalent in size to four football pitches. More than 800 piles will be installed in creating the new Euston scissor box that will carry the new running lines. Works will also be carried out to construct some 700 piles for two new bridge structures, in addition to 418 piles for the Euston Throat Retained Cut, an extension to the scissor box, and 106 piles for the new Euston Cavern shaft.

Last updated: 28/11/2023