HS2 have reached a major milestone as they begin work on the UK’s longest railway viaduct on the outskirts of London.
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HS2 have revealed designs for the north portal, which cuts noise from trains entering and exiting the Chiltern Tunnel at speeds of up to 320km/h.
HS2 has begun production on 1,000 concrete segments that will form the deck of the Colne Valley Viaduct, the UK’s longest railway bridge.
HS2 has unveiled the first plans for the final ‘barn design’ headhouses, as construction has begun to provide emergency access to the 10-mile-long Chiltern tunnel.
Engineers working on Britain’s new high-speed railway have begun excavating the first of five shafts that will provide ventilation and emergency access to the 10-mile long tunnels they are digging under the Chiltern hills.
HS2's second tunnel boring machine, 'Cecilia', will operate alongside an identical machine, named ‘Florence’, to excavate separate northbound and southbound tunnels.
In a landmark moment for the project, HS2 Ltd will launch the first tunnel boring machine from HS2’s South Portal site on 13 May 2021.
HS2 Ltd has revealed that the first of 112,000 Chiltern tunnel wall segments have rolled off the production line ahead of the Tunnel Boring Machine launch.
HS2's Colne Valley Viaduct will span the length of 3.4 km and be supported by 56 piers, and work has now begun to sink the required 292 piles.
With 30 new apprentices set to join the business in September 2021, HS2 is making progress in delivering on its promise to create 2,000 apprenticeships over the project’s lifetime.
The headhouse will have a 78m ventilation shaft reaching down to the twin tunnels below, regulating air quality and temperature, removing smoke in the event of a fire and providing access for emergency services.
The two 170m-long TBMs – the largest ever used on a UK rail project - will start to be assembled on site ready to begin digging the 10-mile-long Chiltern tunnels.
HS2's innovative onboard robot will boost safety and efficiency by removing the need for personnel to work in a potentially hazardous area.
Named Florence and Cecilia, the two Tunnel Boring Machines have been completed in Germany and are now ready to be shipped to the UK to begin the 10-mile-long Chiltern tunnel excavation.
Prior to the arrival of the two tunnel boring machines, HS2 has completed the high headwall and ground reinforcement at the Chiltern tunnel site.