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Next stage of construction begins at HS2’s longest green tunnel

Press release - The construction of HS2’s longest green tunnel took a major step forward  with the realignment of a key local road, freeing up space for the next phase of ... More Information

HS2 celebrates final Birmingham tunnel breakthrough

This morning at Washwood Heath the125-m-long TBM Elizabeth - launched in March 2024, near the Warwickshire village of Water Orton - brokethrough the 3.5-mile-long Bromford tunnel marking the completion of major tunnel excavation between London’s Old Oak Common and the West Midlands. More Information

HS2 lifts third giant TBM in London after 5.47 km (3.4-mile) underground journey

On Saturday 26th July, the team working on the HS2 project lifted the TBM Emily's 9.11m diameter cutterhead, front and middle shield, weighing 880 t, using a large gantry crane, at the Green Park ... More Information

HS2 completes excavation of the Norton tunnel under London

HS2 completes excavation of the Norton tunnel under London

Excavation of the  twin-bore Northolt tunnel between West Ruislip at the outer edge of the capital and the new Old Oak Common super-hub station in west London has been completed. On 26th June ... More Information

Press release - Third HS2 tunnelling machine completes its drive beneath London

Press release - Third HS2 tunnelling machine completes its drive beneath London

HS2’s tunnelling team in London is one step closer to completing the capital’s Northolt Tunnel after the latest in a series of complex tunnelling breakthroughs. The tunnel boring ... More Information

The giant HS2 TBM Mary Ann to be given a new lease of life

After completing the 3.5-mile (5.8km) mission to excavate the first section of the Bromford tunnel, linking North Warwickshire and Birmingham, HS2’s giant TBM Mary Ann is being stripped down ... More Information

HS2 lifts TBM Caroline from below ground at the Green Park Way site in Greenford

HS2 lifts TBM Caroline  from below ground at the Green Park Way site in Greenford

On Sunday 25th May, engineers working on the HS2 project lifted the TBM's 9.48 metre diameter cutterhead, front and middle shield, weighing 850 tonnes, using a large gantry crane. The tunnelling ... More Information

HS2 celebrates first Birmingham tunnel breakthrough

HS2’s giant TBM Mary Ann broke through on 9th, May 2025, marking the end of her mission to excavate the first bore of what will soon become the longest railway tunnel in the West ... More Information

HS2 - Second TBM completes the western section of Northolt tunnel

On 3rd April 2025 HS2 has completed a 5-mile tunnel drive under London – using one of four TBMs being deployed to build the railway’s Northolt tunnel. The TBM named Caroline, is the ... More Information

HS2 TBM Sushila removed following Northolt tunnel excavation

HS2 TBM Sushila removed following Northolt tunnel excavation

Following its 8 km (5-mile) drive underneath the capital, HS2 lifted TBM Sushila out of the ground at the Green Park Way site in Greenford, West London.    The cutterhead, ... More Information

HS2 - Construction milestone at Long Itchington Wood Tunnel

HS2 has announced a significant milestone at Long Itchington Wood tunnel in Warwickshire – the first deep tunnel on the high-speed route to complete its civil engineering ... More Information

HS2 Construction Update - 2025

Click here for the 2025 project update which highlights the progress across 350 worksites between London and the West Midlands and it provides a snapshot of the huge progress HS2 is making ... More Information

HS2 - TBM Sushila completes its 8.04 km excavation of Northolt tunnel

HS2 - TBM Sushila completes its 8.04 km excavation of Northolt tunnel

On 19th December 2024,  TBM Sushila - which is 160-m in length, with a cutterhead of 9.84 m in diameters and a weight of 2,050 t, reached Green Park Way vent shaft in Ealing, breaking through ... More Information

HS2 reaches halfway point on key ‘green tunnel’

Press Release - Construction of the 700-metre-long HS2 Burton Green ‘green tunnel’ is now 50% complete, with 150 people supporting the build process The last year has seen completion of ... More Information

Renewed funding for HS2 project

Press release - In the latest 2024 UK budget, Chancellor Rachel Reeves has allocated renewed funding for the HS2 project, specifically prioritizing the development of its tunnel network. This ... More Information

HS2’s tunnelling into Birmingham reaches halfway point

The construction of HS2’s gateway to Birmingham takes a leap forward as the huge 125-m-long TBM digging the first bore of the Bromford tunnel reaches the halfway point.  The 1,600 t ... More Information

PRESS RELEASE - We’re half way there! HS2’s Northolt Tunnel under the capital is 50% complete

PRESS RELEASE - We’re half way there! HS2’s Northolt Tunnel under the capital is 50% complete

Quartet of tunnelling machines boring the Northolt Tunnel between West Ruislip and Old Oak Common station have built half of the tunnel New video and images shows the unstoppable momentum of the ... More Information

HS2 Updates

HS2 Updates

Chiltern tunnel TBMs dismantled - The Dismantling of the two Herrenknecht TBMs - 170m long and weighed 2,000 t - that built HS2 (High Speed Two) Ltd’s Chiltern Tunnel have now been ... More Information

HS2 launches fourth TBM under London building the Northolt Tunnel

HS2 launches fourth TBM under London building the Northolt Tunnel

On April 8th, 2024 construction of the new HS2 line has hit another major milestone with the launch of the fourth – and final – machine being used to build the Northolt tunnel, length ... More Information

Final breakthrough for the Chiltern tunnel, HS2’s longest tunnel

Final breakthrough for the Chiltern tunnel,  HS2’s longest tunnel

Cecilia, the second 2000 t TBM, reached northern portal of 16.09 km (10 mile) high-speed rail tunnel under Chiltern Hills completing a journey that began in June 2021: click here for the ... More Information

The last HS2 TBM in the West Midlands starts digging towards Birmingham

The last HS2 TBM in the West Midlands starts digging towards Birmingham

On 05 March 2024 HS2 launched the last TBM to dig tunnels for the new high speed railway in the West Midlands. The 1,600 t weight and 125 m long TBM has started on its journey to dig the second bore ... More Information

Historic breakthrough for HS2’s longest tunnel

Historic breakthrough for HS2’s longest tunnel

HS2’s first giant TBM – which launched almost 3 years ago – broke through on 27 February at the end of her 16 km (10-mile) journey under the Chilterns, excavating the longest ... More Information

HS2 launches third TBM under capital building the Northolt Tunnel

On 25th February HS2’s London tunnels programme passed a major milestone as the third TBM being used as part of the project was launched.  TBM Emily, named after Emily Sophia Taylor who ... More Information

Small businesses win big with £millions more HS2 orders

Press release - Britain’s biggest construction project, HS2, is helping the UK’s small business community to thrive. New figures show HS2’s civils contractors doubled their total ... More Information

Press release - Completion of HS2 logistics tunnel paves the way for high-speed line to Euston

Press release - Completion of HS2 logistics tunnel paves the way for high-speed line to Euston

HS2 today (Tuesday 23rd January) celebrated the breakthrough of a tunnelling machine into its underground Old Oak Common station – marking a key milestone in plans to eventually carry the ... More Information

HS2 on track for pivotal 12 months as high-speed railway takes shape

Press release - HS2 is preparing to enter a critical new phase with the development of state-of-the-art rail systems that will allow passengers to enjoy some of the world’s most reliable ... More Information

Press release - Second giant HS2 tunnel boring machine gets ready to start digging under Birmingham

Press release - Second giant HS2 tunnel boring machine gets ready to start digging under Birmingham

A team of 90 specialist engineers have completed the assembly of HS2’s giant tunnel boring machine (TBM) which will start digging the second bore of the 3.5 mile Bromford Tunnel into ... More Information

HS2: Half of Chiltern tunnel cross-passage mining complete

The construction of the HS2’s longest tunnel - stretching for 16.09 km (10 miles) under the Chilterns - passed a key milestone this week with mining completed for 19 out of 38 emergency ... More Information

TBM Anne lowered into launch chamber

On 17 November, 2023 the Skanska Costain Strabag Joint Venture completed the final lift of major TBM Anne components into the huge launch chamber in West London, under the lights of ... More Information

Lift off! HS2’s latest London tunnelling machine assembled 25 metres below ground

Press release - We've unveiled the names of the next pair of tunnel boring machines (TBMs) that will construct the high speed rail line under the capital. Following a public vote, the names Emily ... More Information

HS2 – Latest Green Tunnel

HS2 – Latest Green Tunnel

HS2 has begun assembling the project’s longest ‘green tunnel’ - designed to blend the high speed railway into the rural landscape and reduce disruption for communities around ... More Information

HS2 opens TBM naming competition

HS2 (High Speed Two) Ltd is asking the public to choose names for the next two TBMs that will be launched in early 2024 to dig the Northolt Tunnel East travelling through Brent and Ealing. The TBMs ... More Information

HS2’s Tunnel progress - TBMs Florence and Cecilia reached Little Missenden

HS2’s Tunnel progress - TBMs Florence and Cecilia reached Little Missenden

Last week on August 8th, 2023 the giant TBMs reached the Little Missenden ventilation shaft, passing the fourth of five ventilation and emergency access shafts, 75% of the way through the 16 km (10 ... More Information

HS2 tunnelling in the capital passes the first Milestone

HS2’s first two TBMs in London, Sushila and Caroline, have completed the 1.6 km (first mile ) of the twin-bored Northolt tunnel  in the capital.  Since launch in November 2022, the ... More Information

Experienced TBM Fitters wanted - North West London

Experienced TBM Fitters wanted - North West London

Tunnelcraft are recruiting experienced TBM Fitters for one of their prestigious long running HS2 projects in Northwest London. Competitive rates paid plus accommodation. Candidates are to possess ... More Information

HS2 unveils huge tunnel boring machine ready to dig HS2’s Bromford Tunnel in the West Midlands

HS2 unveils huge tunnel boring machine ready to dig HS2’s Bromford Tunnel in the West Midlands

The first images have been revealed of the huge tunnel boring machine (TBM) that will dig HS2’s Bromford Tunnel, between Water Orton in North Warwickshire and Washwood Heath in ... More Information

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Tunnelling News

Funding problems affect metro line extensions

In the Athens metropolitan area, construction of Line 4 is continuing, with the Avax-Ghella-Alstom consortium saying the two tunnel-boring machines ... More Information

Transport Minister inspects progress on Cairo Metro Line 4 phase one

Four tunnel boring machines (TBMs) are in operation—two in each direction. According to the project timeline, the first TBM has reached the Grand ... More Information

Here's what happened with Toronto's Scarborough Subway Extension in 2025

SSE tunnelling, which began in January 2023, is being carried out with the largest tunnel boring machine (TBM) ever used on a Canadian transit project ... More Information

NHAI connects Tunnel No. 4 on Shimla bypass

NHAI PIU Shimla Project Director Anand Kumar, Bharat Construction ... The tunnel was constructed using the New Austrian Tunnelling Method (NATM) ... More Information

Mumbai-Ahmedabad Bullet Train Update: Palghar Tunnel Breakthrough Achieved

NHSRCL Bullet Train Project | India First Bullet Train Update: Last year, the Ministry of Railways achieved a breakthrough in the construction of ... More Information

Main tunnel works connecting future Changi Airport T5 to existing T2 completed

Main tunnel works connecting the future Terminal 5 to the existing Terminal 2 are completed, as the Changi East development gathers pace... More Information

Testing completed on Hudson River Tunnel boring machines

The project calls for construction of 9 miles of passenger-rail track between New York ... More Information

World's longest motorway tunnel finally opens in £3BILLION project

The Tianshan Shengli (Victory) Tunnel, located in the Tianshan Mountains of Xinjiang, China, measures some 22 kilometres – roughly 13.75 miles – and ... More Information

Cross-river tunnel of Nanjing Metro Line 4 Phase II completes tunneling

This photo taken on Dec. 27, 2025 shows the rear of the "Xinzhengcheng" tunnel boring machine at the construction site of Nanjing Metro Line 4 ... More Information

Tunnels Design and Construction Market is Going to Boom

HTF Market Intelligence projects that the global Tunnels Design and Construction market will expand at a compound annual growth rate (CAGR) of 6.80% from 2025 to 2032, from 72 Billion in ... More Information

Longest tunnel in the world costing £7billion will connect 3 European cities

The Brenner Base Tunnel is currently under construction and will connect the countries of Austria and Italy. The impressive tunnel, which is set ... More Information

Georgian Officials Mark Completion of Railway Modernization, Hoping to Boost Transit

The works also included the construction of the 8,300-meter dual-tube tunnel near Kvishkheti, 10 bridges, six tunnels, and around 100 engineering ... More Information

Israeli municipality approves budget for new tunnel project south of Jerusalem

The Jerusalem Governorate said that the project aims to connect the Har Homa settlement, built on Jabal Abu Ghneim land, to the Begin bypass road near ... More Information

Megaprojects Under Construction Around World In 2026

Described as the largest road tunnel in the U.K., the Lower Thames Crossing will link Tilbury in Essex via a tunnel underneath the Thames with ... More Information

Delhi Metro expansion: Cabinet approved Rs 12,015 crore project

The project, planned over a construction timeline of three years, will be executed largely underground using tunnel boring machines to minimise ... More Information

World's Longest Expressway Tunnel to Open, Linking North and South Xinjiang

Engineers used innovative methods and specially designed machines called tunnel boring machines (TBMs) to dig through hard rock faster and safer than ... More Information

The huge £21bn mega-tunnel that goes right through the middle of a mountain

Huge boring machines will create a 57.5km (35.7mile) tunnel through the Alps to connect French and Italian high-speed rail networks and link Lyon ... More Information

Rome digs deep for railway that burrows beneath the Colosseum

Tunnellers used lasers to check whether ancient columns at the nearby Forum were not wobbling as their 300ft long tunnel boring machine churned ... More Information

World’s largest-diameter high-speed railway shield tunneling machine reaches milestone

The world's largest-diameter high-speed railway shield tunneling machine independently developed by China, “Linghang,” for the Chongming-Taizhou ... More Information

Third circuit on £1bn London Power Tunnels 2 project energised

Electricity has begun flowing through a new section of National Grid's London Power Tunnels 2 (LPT2) project after the energisation of a ... More Information

Westmead metro station cavern formwork the biggest in the southern hemisphere

Crews are now retrieving the 1,200-tonne Tunnel Boring Machines (TBMs) that arrived beneath Westmead in September and October, lifting each machine ... More Information

Webuild: excavation begins on three tunnels for Salerno-Reggio Calabria HS/HC Railway

All four TBMs planned for Lot 1A Battipaglia–Romagnano section are operational with launch of latest three Joining TBM Partenope, already active, are Leucosia and Ligea, whose names were ... More Information

SELI Overseas: 75 Years of Tunneling with TBMs

From Channel Tunnel to the Brenner Tunnel: When Tunneling Is Synonymous with Innovation ... SELI TBM at work on the construction site... More Information

Road realignment is major step for HS2, says firm

HS2 Ltd A view of the realigned B4525 on an overcast day. · HS2 Ltd An aerial view of the construction of Greatworth tunnel showing major earthworks ... More Information

Amtrak has made real progress in East River Tunnel rehabilitation

The tunnel has been stripped down to the concrete liner. Westbrook was told the project isn't just about modernizing and replacing what was, but also ... More Information

Madrid invests EUR 123 million in new metro stations on Line 11

TBM Mayrit enters into action in 2026 · November 2025 – February 2026: assembly of the tunnel boring machine in Comillas Park (Carabanchel district) ... Facebook Twitter Flag as ... More Information

Jerusalem Light Rail Construction Advances Ahead of Major Tunnel Work

Local reporting on city project materials notes that “the plan calls for a 2-km underground tunnel to be built beneath the city center, including ... More Information

Why and how the Civil Works Alliance changed Sizewell C tunnel designs from Hinkley Point C

Ground conditions around Sizewell C have required intense collaboration between the project’s contractors alliance to come up with new outfall and intake tunnel design solutions... More Information

AI planning of the first railway tunnel through challenging terrain

AI plans first rail tunnel through tough terrain. Artificial Intelligence China Uses AI for the Construction of Railway Tunnels. 2025-12-08 ... More Information

Will Tunneling Projects Be The Next Big Thing For Mumbai's Public Transport?

During the interview, she also called tunnel boring machines the safest and one of the most efficient ways of doing tunelling. "Only the place of the ... More Information

Chipolbrok vessels deliver tunnel boring machines to Sydney and mineral bulk to Peru

Chipolbrok delivers TBMs for Sydney Metro on Chipolbrok Star and loads 29000t minerals in Peru on Taixing, showcasing fleet versatility... More Information

How Seequent's software solutions help to manage tunnelling data

The second phase of Singapore's Cross Island Line (CRL) metro project is under way, assisted by a suite of software from Seequent. Singapore's CRL is ... More Information

Muography to Transform Tunnel Safety Monitoring

Underwater bridge tunnels have become vital arteries for cities, enabling smooth vehicular passage beneath rivers, bays, and inland waterways. More than 200 of these structures operate ... More Information

10 longest tunnels in the world that reshaped global transportation

Modern tunnel construction involves sophisticated techniques, including tunnel boring machines and advanced geological surveying. The project ... More Information

Čučković: Construction of the tunnel boring machine for the Belgrade Metro in final phase

It is a good thing that we, for example, acquired these tunnel boring machines at a lower price than other countries... More Information

Serbia plans to borrow 2.5 billion EUR in 2026 for the construction of the Belgrade metro

It is also stated that two TBMs (tunnel boring machines), the so-called moles, have already been ordered and are expected to be delivered to ... More Information

VSM starts operation at Tilbury

The pioneering Vertical Shaft Sinking Machine (VSM) from Herrenknecht, named “Verena”, after Verena Holmes, a pioneering British mechanical ... More Information

Metrolinx reveals names of Ontario Line tunnel boring machines

Following a contest, Metrolinx has officially named its two massive tunnel boring machines Libby and Corkie... More Information

Montreal blue line metro tunnel boring machine has arrived, time to dig

It's basically building the backbone of the blue line extension,” said project chief Maha Clour, pointing out that crews have reached the bottom of ... More Information