Construction of the Colne Valley Viaduct has now started, overseen by HS2’s main works contractor Align JV – a Bouygues Travaux Publics, Sir Robert McAlpine and VolkerFitzpatrick consortium.
Once complete, the viaduct will be the UK’s longest railway bridge.
A 700 tonne, 160-metre launching girder has now begun lifting the giant concrete deck segments that form the viaduct’s arches into position. A total of one thousand deck segments will be needed, each weighing up to 140 tonnes.
Work on the viaduct’s foundations began in March and a total of 56 piers, each weighing around 370 tonnes, are being sunk along the valley ahead of the girder.
The girder will move from one pier to the next, installing the deck segments as it goes. One segment is put in place each side of the central pier, using a cantilever approach to balance the structure, as two half-arches either side of each pier are constructed simultaneously.
Steel tensioning cables will be threaded through the segments to strengthen the bridge.
To allow for the viaduct’s curves, the segments are all slightly different shapes and made on site at a purpose-built temporary factory. At the peak of construction it will match-cast roughly 12 segments every week.
This approach, where each segment is poured against the previous one, will ensure the whole deck fits perfectly when assembled on the piers.
“I'm absolutely delighted that we have started work to assemble the giant deck segments that will form the Colne Valley Viaduct.
“Once complete, this record-breaking structure will form a key part of the HS2 railway.
“I’d like to thank all those involved in getting us to this exciting stage and look forward to seeing the whole viaduct come together over the coming years.”
Once construction is complete, the factory and surrounding buildings will be removed and the whole area between the viaduct and the Chiltern tunnel will be transformed into an area of chalk grassland and woodland as part of HS2’s green corridor project.
HS2 has begun work on assembling the project's longest ‘green tunnel’ in Greatworth, West Northamptonshire.
Derby City Council has announced that it is seeking talks with Alstom in response to expected job losses at its Derby factory.
HS2's high-speed electric trains have become the first in the world to achieve BSI's PAS 2080 carbon reduction standard.
HS2 has completed construction of Streethay Overbridge to enable high-speed trains to travel underneath the South Staffordshire railway.
HS2's tunnel boring machines (TBMs), Florence and Cecilia have reached the Little Missenden shaft as they dig HS2’s longest tunnels.
After six years at the head of HS2 Ltd, CEO Mark Thurston has announced that he will leave the organisation this autumn.
HS2 Ltd has begun the procurement process for the APM system that will run between Solihull's Interchange Station and Birmingham Airport.
HS2 has announced that a second set of proposed changes to the High Speed Rail (Crewe – Manchester) Bill has been introduced to Parliament.
HS2 has released the first images of the tunnel boring machine that will dig Bromford Tunnel between North Warwickshire and Birmingham.
HS2 workers have completed the first base slab concrete pour at the western end of Old Oak Common station, advancing progress on the key infrastructure project....
With Railtex taking place in Birmingham, we take a look at the history of Birmingham’s Curzon Street within the context of HS2.
Jonn Elledge on the absolute madness that is terminating HS2 at Old Oak Common rather than Euston for the foreseeable future.
HS2 has received design approval for Small Dean Viaduct, which will take HS2 trains across the A413 and local rail lines.
Skanska Costain STRABAG JV has launched HS2's third London tunnel boring machine (TBM), 'Lydia' to construct the Atlas Road Logistics Tunnel.
A tunnelling milestone for HS2: the tunnel boring machine Dorothy has broken through on the second bore of the Long Itchington Wood tunnel.
The National Audit Office has released a report evaluating whether the DfT and HS2 Ltd can effectively manage the delivery of HS2 Euston.
Over 40bn GBP will be invested in the UK's transport network over the next two years, with a focus on delivering the first phase of HS2.
The two tunnel boring machines (TBMs) digging HS2’s longest tunnels has passed Amersham shaft on their 10 mile drive under the Chilterns.
HS2 has proposed changes to the construction design of its Manchester route following work with the UK Environment Agency.
New plans have been put forward to improve access to the proposed HS2 and Northern Powerhouse Rail station at Manchester Airport.
The High Speed Rail Group and HS2 Ltd have both hit back at a report created by the Cheshire Wildlife Trust about HS2's environmental impact.
Birmingham City Council has granted planning permission approval for HS2's Washwood Heath Depot, north-east of Birmingham city centre.
HS2's tunnel boring machines, Florence and Cecilia have passed the halfway point on their 10-mile journey excavating the Chiltern tunnels.
HS2 Ltd’s contractor, Align JV has installed the last of 292 concrete piles, forming the foundations for the UK’s longest railway bridge.
Network Rail has upgraded Banbury train depot to keep trains moving on the Chiltern main line during HS2 construction.
The first five-metre-tall V-shaped pier for the Curzon No. 3 Viaduct into HS2's Curzon Street Station in Birmingham has been installed.
A bridge that will carry direct rail services between Oxford and Cambridge has been positioned over the HS2 route near Calvert, Bucks.
HS2 has revealed designs for the Curzon 2 bridge: a 150-metre section of viaduct on the approach to Birmingham’s new Curzon Street Station.
Huw Merriman MP, Minister of State at the Department for Transport, will give a keynote address at this year’s Rail Industry Forum.
HS2’s tunnel boring machine (TBM) Dorothy has begun its second one-mile tunnel bore under Long Itchington Wood in Warwickshire.
HS2 's Euston site construction team Mace Dragados Joint Venture is trialling a hydrogen fuel cell to power a fully electric JCB telehandler.
A second 140 metre long, 2,050 tonnes tunnel boring machine (TBM) has begun its journey across London for HS2.
The West Midlands Rail Executive (WMRE) has revised its strategy on how to grow and develop the region’s rail network over the next 30 years.
HS2’s workforce has almost hit the 30,000 mark. This is down to the recruitment of 2,300 new employees in the last three months.
HS2’s main works contractor, EKFB, has started working on two of the project’s longest cuttings in Buckingham and Oxfordshire.
HS2 has launched the first of six tunnel boring machines (TBMs) that will dig more than 26 miles of tunnels under London.
HS2 Ltd has opened applications for tech start-ups and SMEs to join the fifth group of its Innovation Accelerator programme.
HS2 has commenced work on the thirty-eight cross passages that will link the northbound and southbound Chiltern tunnels.
Dorothy, HS2’s 2000-tonne tunnel boring machine, has made its first breakthrough on the UK's high-speed rail line from London to Birmingham.
HS2 Ltd has contracted Laing O’Rourke to build the HS2 Interchange Station in Solihull at the heart of the high-speed rail network.
The first design images have been revealed for HS2’s maintenance and control centre at the Washwood Heath Depot in Birmingham.
Transport companies have to have resilient cybersecurity systems in place so they can protect their assets and detect and respond to incidents.
Birmingham City Council has granted planning permission to HS2 Ltd to construct two viaducts in Birmingham.
HS2 has begun construction of the first of five ‘green tunnels’ that have been designed to blend into the landscape.
Balfour Beatty VINCI Joint Venture is trialling an electric, high-capacity drilling rig for construction in Warwickshire.
HS2 has announced that OpenSpace Group Ltd is using artificial intelligence (AI) and LiDAR sensors to develop future train stations.
HS2 has reached an agreement to purchase Square One on Travis Street, Manchester from property provider Bruntwood.
Jonn Elledge looks at the story behind Andy Burnham's pointed comments about the exorbitant costs of rail fares in Britain.
HS2 has unveiled updated environmentally-friendly designs for the Cubbington, Warwickshire section of the new high speed line.
HS2 has unveiled the final designs for the Thame Valley Viaduct, which will cross the River Thame’s flood plain near Aylesbury.
HS2 has unveiled designs for Chiltern Tunnel’s north portal, which focus on cutting noise from trains as they enter and exit the tunnel.
A new report highlights the role of HS2 and high speed rail in general in reducing emissions and ultimately achieving net zero.
The two tunnel boring machines digging the HS2 twin tunnels under the Chilterns have reached the ventilation shaft at Chalfont St Peter.
HS2 has shared updated designs for its high speed railway terminus station at London Euston, which will be set across three levels.
The Mace and Dragados joint venture (MD JV) – HS2’s construction partner for Euston station – is ramping up procurement this month.
A new piling technology, known as hollow impressed precast energy reusable pile (HIPER), is being trialled at HS2’s Euston station site.
HS2 has signed the Rail Supply Group’s Work Pipeline Visibility Charter and will share its rail systems' technical specifications publicly.
The ‘High Speed Rail (Crewe-Manchester) Bill’ – HS2 Phase 2b Western Leg – will be introduced in parliament today (24 January 2022).
HS2 has chosen TK Elevator to manufacture and install approximately 160 lifts and 130 escalators at its four main stations.
HS2 archaeologists have excavated a vast roman settlement in Northamptonshire - one of over 100 sites HS2 has examined since 2018.
HS2 has published its Net Zero Carbon Plan, which sets out how it plans to make the project net zero carbon from 2035.
HS2 has revealed the first images of its 1.5 mile-long Greatworth tunnel - one of three ‘green tunnels’ to be built in Bucks and Notts.
Balfour Beatty VINCI (BBV) has launched a recruitment drive to support HS2 construction works planned for 2022 and beyond.
Jonn Elledge gets into the Christmas spirit and does some finger-pointing as to who is really to blame for the state of Britain's railways.
The first of 56 giant concrete piers for the Colne Valley Viaduct has been cast. Once complete, this will be the UK's longest rail bridge.
The contract to design, build and maintain the HS2 rolling stock fleet for Phase 1 London-Birmingham has gone to the Hitachi Rail-Alstom JV.
The first tunnel boring machine working on HS2 in the Midlands launched on 2 December, excavating a one-mile tunnel in Warwickshire.
As part of Alstom's acquisition of Bombardier Transportation, the companies agreed to divest a number of assets, including the V300 ZEFIRO.
Stanton Precast has been awarded the contract to deliver three 'green tunnels' for HS2 by the main works contractor EKFB.
Work on HS2’s Old Oak Common 850-metre-long station box has begun. The reinforced concrete structure will form the station's frame and base.
The Integrated Rail Plan published today, 18 November 2021, announces a huge slash in new railway lines being built in England.
HS2 has published a shortlist of bidders for the Phase 2a Design and Delivery Partner contract. The winner will be announced next summer.
In this month's column, Jonn Elledge muses on the future of HS2's eastern leg and the political tug of war taking place behind the scenes.
HS2 tunnel boring machine ‘Florence’ has passed the one mile mark, cutting through a mix of chalk and flint beneath the Chiltern hills.
HS2 has invited six bidders to tender for a major two-part enabling works contract for its recently approved Phase 2a section.
One year on from the start of phase one's construction, HS2 has announced that 20,000 people are now working on the high-speed rail project.
HS2 has confirmed the shortlist of bidders to build its control centre and rolling stock maintenance depot.
HS2 Ltd has published revised images of the Adelaide Road headhouse in Camden, after changes were made to the design.
Images of HS2’s Chesham Road rural headhouse, which will provide emergency access to the 10-mile-long Chiltern tunnel, has been unveiled.
The companies shortlisted to build HS2's Interchange Station in Solihull have been named by HS2 Ltd. The contract is to be awarded in 2022.
Leaders from across Yorkshire and the North East of England have contributed to a report demonstrating the importance of HS2's Eastern Leg.
SCS JV has signed the first of two contracts for the production of tunnel segments that will be used to construct HS2’s London tunnels.
In a UK first, on-site 3D reinforced concrete printing will be deployed by HS2's London tunnels contractor SCS JV.
Excavation of the vent shaft at Chalfont St Peter has begun in Buckinghamshire. It is the first of five on the HS2 Chiltern tunnels section.
HS2 designers are set to more than halve the amount of embedded carbon used in one of the high-speed rail project’s viaducts.
HS2 has begun its search for a team of specialist ground investigation contractors for the western leg of Phase 2b from Crewe to Manchester.
HS2 has launched Cecilia, the second of two 2,000t tunnelling machines that will excavate ten-mile-long tunnels beneath the Chiltern Hills.
Permanent works on HS2's Old Oak Common station have got under way today with phase 1 seeing the construction of a 750,000m3 underground box.
HS2 has obtained approval for a scheme that will use excavated material to create new chalk grassland, woodland, wood pasture and wetland.
HS2 begins search for a construction partner to build Interchange Station. This will be at the centre of the new high speed rail network.
HS2 Ltd has revealed a new vacuum excavation technique for piling which could have massive benefits for the wider construction industry.
HS2 has deployed the first of 10 tunnel boring machines (TBMs) that will be used during phase one of the UK’s new high speed railway.
HS2 has confirmed that a team made up of Mace and Dragados will build Birmingham’s new city centre high speed railway station.
HS2 has presented its design of the Oxford Canal Viaduct that will measure 62.5m and span the canal and towpath between Banbury and Daventry.
HS2 Ltd has published its shortlist of companies it has asked to tender for the high-speed railway's high-voltage power supply systems.
HS2 has cast the first of 112,000 wall segments for the high-speed railway's 10-mile Chiltern tunnel outside of London.
Work has begun on what will be the UK's longest rail viaduct – the Colne Valley Viaduct to the northwest of London, measuring 3.4km.
HS2 will use retired wind turbine blades originally destined for the incinerator to make reinforced concrete that is carbon-friendly.
HS2 Ltd has started its search for a specialist contractor to deliver the high-speed railway's engineering management system (EMS).
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