Tunnelbuilder Promoting the world's tunnelling industry to a huge qualified audience

View the Spanish Tunnelbuilder website View the Italian Tunnelbuilder website

Archive - News

Featured News

News from Calgary's Green LRT line

The Green Line LRT is the largest infrastructure project in Calgary’s history, with EUR 3.44 bn (CAD4.9 bn) in unprecedented investments from the Government of Canada (33.47%), Government of ... More Information

TERRATEC secures all machines for Surat Metro Rail Project

TERRATEC secures all machines for Surat Metro Rail Project

TERRATEC delivers another EPB TBM that will be used by Gulermak-Sam India JV for the underground works on Phase I of Surat Metro Rail Project in India thus securing all the machines for Phase 1 of ... More Information

Breakthrough for the Coxwell Bypass Tunnel

On the 27/01/2022 TBM Donnie broke through into shaft NTTPT-1, completing 8,490m of the 10,339m tunnel. The construction works were awarded to the Joint Venture North Tunnel Constructors ULC ... More Information

Winning names for the Eglinton Crosstown West and Scarborough Subway Extension TBMs revealed

After thousands of votes from the community, the winning names are in for the Scarborough Subway Extension’s TBM and the two machines that will build the Eglinton Crosstown West ... More Information

Tunnelbuilder welcomes Sandvik

Tunnelbuilder welcomes Sandvik

Sandvik is a high-tech and global engineering Group with about 37,000 employees with a strong commitment to enhancing customer productivity, profitability and sustainability.  Our operations ... More Information

New dates for WTC 2022

New dates for WTC 2022

The WTC2022 Organizing Committee and the ITA announce that the WTC 2022 in Copenhagen will take place from Friday September 2 to Thursday September 8, 2022, instead of April 22 to 28 at BELLA ... More Information

TBM Breakthrough on Lima metro Line 2

TBM Breakthrough on Lima metro Line 2

On the 21/01/2022 Delia, the first TBM to excavate beneath the city of Lima (Peru) and launched in July 2021, has completed the 720-m tunnel section between San Juan de Dios (E-19) and ... More Information

Mumbai Coastal Road - 1st Breakthrough of TBM Mavala

Mumbai Coastal Road - 1st Breakthrough of TBM Mavala

At the beginning of January 2022 L&T completed the 2072 m long tunnel from Priyadarshini Park to Girgaon Chowpatty/Girgaum Chowpatty/Girgaon Chaupty. It’s the first breakthrough for the ... More Information

Geothermal system from tunnel to power visitor centre

The invitation to tender for construction of electrical and lighting installations, piping, data connection cables, control units, etc. for the visitor centre at the Turin-Lyon construction site in ... More Information

First TBMs ordered for Sydney Metro West

Two 1266 tonne, 165 m long double-shield, hard rock, gripper-type TBMs have been ordered to build the city’s next metro rail tunnels as part of the Sydney Metro West project, with the first ... More Information

Progress report for the Brenner Base Tunnel

As of January 2022, 4 main construction lots are under construction: Mules 2-3, Isarco River Underpass (Italian project area); Sill gorge, Sill gorge - Pfons (Austrian project area).  In ... More Information

Breakthrough for DTSS - Phase 2

Breakthrough for DTSS - Phase 2

On the 15/01/2022 the 2nd TBM, named Yuan Ching, with a 7.56m diameter, broke through at around 60m below ground for the Deep Tunnel Sewerage System Phase 2, Contract T-09. The TBM has completed its ... More Information

TBM for Pawtucket Tunnel Project passes FAT

TBM for Pawtucket Tunnel Project passes FAT

On the 14/01/22 the 10.3m Multi-Mode TBM, built by Herrenknecht for Narragansett Bay Commission's (USA) Pawtucket Tunnel Project, passed its Factory Acceptance Testing. The TBM - commissioned by the ... More Information

Canada – Latest News on Eglinton Crosstown West Extension and Scarborough Subway Extension

Canada – Latest News on Eglinton Crosstown West Extension and Scarborough Subway Extension

The TBMs, which will dig the tunnels for the Scarborough Subway Extension and the Eglinton Crosstown West Extension in Toronto, arrived at the ports of Oshawa and Hamilton in mid-December 2021. ... More Information

Excavation for the ECRL’s Genting tunnel starts March 2022

Excavation for the ECRL’s Genting tunnel starts March 2022

The Malaysian Transport Minister Datuk Seri Wee Ka Siong has signed the full approval for the ECRL - East Coast Railway Link, Section C2 (ITT Gombak - Serendah - Puncak Alam  - Port Klang), ... More Information

Single Bore Tunnel Remains the Best Option for BART Silicon Valley Phase II Project

Since 2016, the 8 km (5-mile) tunnel portion of the 9.66 km (6-mile), 4-station planned BART extension through downtown San Jose to Santa Clara has been the most studied and talked about aspect of ... More Information

HS2 reveals images of first landscaped ‘green tunnels’ for Bucks and Northants

HS2 reveals images of first landscaped ‘green tunnels’ for Bucks and Northants

Press release - New images showing the green tunnel at Greatworth, Northamptonshire, with similar designs planned for Wendover and Chipping Warden Modular design set to cut embedded carbon in ... More Information

Everything I learned in a morning hiding in a tunnel under the Chilterns – by Jonn Elledge

Hi Jonn – I hope you’re well. This is just a quick note to see if you would be interested in a guided tour of one of HS2’s first two tunnelling machines (TBMs)... They are ... More Information

ISAVFT 2022 - Extended Call for Papers deadline

The ISAVFT - International Symposium on Aerodynamics, Ventilation & Fire in Tunnels will be held at Brighton (UK) between the 28-30 September 2022. The Call for Papers deadline has been extended ... More Information

Robbins Crossover holes through in the Andes

Robbins Crossover holes through in the Andes

A Robbins 4.6 m (15.1 ft) diameter Crossover machine holed through in the Andes Mountains of Chile in the last quarter of 2021. The XRE TBM bored a 3.3 km (2.1 mi) long tunnel for Chile’s Los ... More Information

Latest tunnelling updates from the Namma/Bangalore Metro

Latest tunnelling updates  from the Namma/Bangalore Metro

M/S Afcons Infrastructure LTD is working on the 3.655 Kms, between South Ramp to Rashtriya Military School (RT-01 Package), including the 3 underground stations Diary Circle, Mico Industries and ... More Information

Moscow BCL metro - All tunnels have been completed

Moscow BCL metro - All tunnels have been completed

On 29/12/2021 TBM Lilia completed the excavation of the last 1.2 km section of the BCL in Moscow,  from the Nagatinsky Zaton station to the Klenovy Boulevard: click here ... More Information

New milestones for Pedemontana Veneta construction

At the beginning of December 2021, the Northern tube of a 6 km tunnel the broke through between Castelgomberto and Malo. Which allowed for a 35 km section of road between Bassano Ovest and ... More Information

Numerical standards and certifications to increase efficiency in the development of underground infrastructure projects – BIM for tunnelling

Numerical standards and certifications to increase efficiency in the development of underground infrastructure projects – BIM for tunnelling

Numerical standards and certifications to increase efficiency in the development of underground infrastructure projects – BIM for tunnelling – written by Michel Rives from ... More Information

TERRATEC EPBMs are ready for India's first Regional Rapid Transit System - Delhi-Meerut Project

TERRATEC EPBMs are ready for India's first Regional Rapid Transit System - Delhi-Meerut Project

TERRATEC is pleased to announce the delivery of three (3) new 7.51m diameter Earth Pressure Balance Tunnel Boring Machines (EPBMs) for India’s first Regional Rapid Transit System Project to ... More Information

Grand Paris Express - December updates

Grand Paris Express  - December updates

Line 15 South - The excavation of this line involved 10 TBMs, which installed 128,000 segments and 18,500 rings. In 2019 TBM Steffie-Orbival was the first machine to complete its section, followed ... More Information

Tunnelbuilder welcomes 4STREETS

Tunnelbuilder welcomes 4STREETS

4STREETS s.r.l. is a young company founded in the spring of 2016 by motivated and experienced entrepreneurs who, combining the skills they had acquired in managing numerous construction sites in the ... More Information

Breakthrough - Genoa Junction One project

Breakthrough -  Genoa Junction One project

On 21/12/21 the excavation activities for the new San Tomaso tunnel, a strategic part of the Terzo Valico dei Giovi – Genoa Junction One Project, and the first of the Genoa railway junction, ... More Information

HS2’s London Tunnels programme nears launch date as first TBM’s arrive

HS2’s London Tunnels programme nears launch date as first TBM’s arrive

Press release - The start of tunnelling for HS2 in London is set to begin in 2022 and progress has been made with the delivery of two giant Earth Pressure Balance Tunnel Boring Machines (TBMs) to ... More Information

The UK’s largest Tunnel Boring Machine passes factory acceptance test and begins journey to the Silvertown Tunnel project

PRESS RELEASE - The Riverlinx Construction Joint Venture (BAM Nuttall, Ferrovial Construction and SK Ecoplant) delivering the design and build of the Silvertown Tunnel on behalf of Transport for ... More Information

Cross River Rail – Last breakthrough for the project

Cross River Rail – Last breakthrough for the project

Today TBM Merle broke through at the Northern Portal site, bringing the Cross River Rail project’s year of tunnelling to an end, click here for the video. The Cross River Rail's twin tunnels ... More Information

Construction of Sornaistentunnel approved

Construction of Sornaistentunnel approved

Helsinki City Council have approved the Sornaistentunnel project between the Sornainen coastal road and the Hermann coastal road and its implementation in stages as follows:   In the ... More Information

Clearwater Project Update

Clearwater Project Update

In October TBM Rachel began boring, stopping every 1.5 m (5 feet) to construct a ring of the tunnel wall. About 106 m (350 feet) of tunnel has been completed so far, and the pace is expected to pick ... More Information

The HRBT Expansion Project TBM Arrival Ceremony

Virginia Department of Transportation and Hampton Roads Connector Partners (HRCP) will celebrate the arrival of TBM Mary at The Port of Virginia Portsmouth Marine Terminal on the 14th December 2021. ... More Information

New section of Moscow’s BCL metro opened

New section of Moscow’s BCL metro opened

Russian President Vladimir Putin and Moscow Mayor Sergei Sobyanin opened a new almost 24 km section of the BCL including 10 stations (Terekhovo , Kuntsevskaya , Davydkovo, Aminevskaya , Michurinsky ... More Information

Snowy 2.0 Ramps Up with commissioning of Second TBM

Snowy 2.0 Ramps Up with commissioning of Second TBM

This month Snowy Hydro achieved another exciting milestone, with the commissioning of Kirsten, the second of three TBMs that will excavate more than 27km of tunnels for Snowy 2.0 pumped-storage ... More Information

Tunnelling News

Light at the end of the tunnel showing for Mount Washington transit project

The project is expected to be completed in October. New tracks finally emerge from the Mount Washington Transit Tunnel as a part of Pittsburgh ... More Information

Davao City Bypass South Tunnel hits breakthrough towards improved connectivity

The Construction Project with the ceremonial breakthrough of the southbound tunnel, marking the complete excavation from opposite ends of the ... More Information

Which companies are bidding for the US$2.3bn highway and tunnel contracts in Brazil?

The project in Brazil, as it will be the country's first underwater tunnel,” the person added. The project involves construction of a 1.5km tunnel ... More Information

US Northeast Rail Corridor Gets a Major Makeover with Tunnel and Bridge Replacements

This project is designed to replace tunnels severely damaged by Superstorm Sandy, ensuring smoother and more reliable service for Amtrak, NJ Transit, ... More Information

DPWH, JICA celebrate breakthrough of Southbound Tunnel in Davao Bypass

The event marked the successful connection of the tunnel's north and south ends. The ... More Information

Jacobs joins Ramboll on Marselis road tunnel project in Denmark

Danish Road Directorate senior project manager Michael Schmidt Vosgerau said: “It is a complex task to build a tunnel on one of the busiest access ... More Information

Planning continues for Midway Tunnel, Safe Streets for All projects

The Midway Tunnel project is a $13.4 million plan ... construction of a new overpass bridge and pedestrian and bicycle walkway above the tunnel. More Information

Four million tons of clay moved in HS2 excavation

Construction on HS2's second-longest tunnel started in October 2022. The rotating cutters cut away clay and other material at a rate of about 50ft ... More Information

Jacobs Has Design-CM Role on $640M Denmark Tunnel, With Ramboll as Key Consultant

Set to begin construction in 2028, Marselis Tunnel project is core component of the country's 10-year Infrastructure Plan 2035. By Emell D. Adolphus. More Information

Elon Musk's $760,000,000 plan to build underground tunnels beneath Houston, Texas

Elon Musk's next big construction plan from The Boring Company could build $760000 worth of tunnels beneath Houston to help with flooding... More Information

Kerala Moves Closer To Vizhinjam–Balaramapuram Tunnel Rail Project

The Kerala government is preparing to invite bids next month for the tunnel rail project linking Vizhinjam International Seaport with ... More Information

Norway's Ship Tunnel Project Under Threat as Costs Rise

New cost estimates suggest the ambitious project will far exceed its approved budget, raising questions about whether it will ever be built. More Information

Davao City Bypass southbound tunnel nears breakthrough

The Department of Public Works and Highways (DPWH) announced that the southbound tunnel of the Davao City Bypass Construction Project (DCBCP) is ... More Information

CA should pursue better alternatives to the costly Delta Tunnel Project Stocktonia

Governor Gavin Newsom is attempting to fast-track the construction of a massive, budget-busting water tunnel through the Delta to ship freshwater to ... More Information

Physical Origins of Shear Strength Fluctuations in Fault Gouges

Fault gouge is rock texture within fault zones that may include rock fragments (RF) and foliated structures. Previous studies have primarily focused on remould soils, the natural structure ... More Information

Webuild expands its role in high-speed rail projects

Four modern tunnel boring machines will be deployed to ensure precision and safety in complex geological conditions. Once completed, the old single- ... More Information

Hudson Tunnel Project advances as tunnel boring machines near completion

The Hudson Tunnel Project hit a key milestone as massive tunnel boring machines near completion, with delivery set for November. More Information

Nagdhunga tunnel in final stages of construction

If we look at the history of road construction and development in Nepal, there are various records of road construction starting from the Rana period. According to articles published in ... More Information

Boring of tunnel across Yellow River completed in China's Shandong

Constructed by using a "Shanhe" shield machine with a 17.5-meter excavation diameter, this double-deck, two-way, six-lane tunnel stands as the world's ... More Information

The £1.6bn plan for world's deepest underwater road tunnel leaving 'no room for error'

Opening of Rogfast tunnel under construction. The Rogfast tunnel will be the longest and deepest undersea road tunnel on Earth. (Image: SKANSA). A ... More Information

Tunnelling complete on NSW's Coffs Harbour bypass project

Tunnelling has been completed on the A$2.2bn (£1.1bn) Coffs Harbour bypass project in New South Wales, Australia, with the excavation of the third ... More Information

Veidekke acquires tunnel construction contract for Gothenburg's West Link Project

Veidekke has received a contract from the Swedish Transport Administration to build the Stora Hamnkanalen tunnel, a component of the West Link ... More Information

German Rail completes construction of Rastatt Tunnel

GERMAN Rail (DB) has completed civil works on the new 4270m twin-bore Rastatt Tunnel, a major component of the project to widen to four tracks the ... More Information

Final contracts signed for Eastern Freeway transformation

A huge amount of work is underway to build North East Link and upgrade the freeways – two tunnel boring machines are digging deep under Rosanna ... More Information

Progress on Sydney pipeline duplication

Bouygues Construction Australia and Rob Carr have launched a tunnel boring machine (TBM) on Sydney Water's Thornleigh pipeline duplication ... More Information

The latest plan to connect BART to downtown San Jose: One tunnel rather than two

When BART and Santa Clara Valley Transportation Authority first discussed plans to send trains rolling under downtown San Jose, transit officials contemplated a design with two tunnels ... More Information

Nashville Tesla tunnel: Here's when construction could start on the Music City Loop

Elon Musk's The Boring Company is currently in the design phase of constructing a tunnel connecting downtown Nashville to the Nashville ... More Information

World's longest underwater 'mega tunnel' to cost $46 billion but will halve 21-hour drive

Oddvar Kaarmo, the Rogfast project manager, cited additional motivation for the tunnel's construction: "The port at Mortavika is quite exposed and ... More Information

China's first vertical large model for tunnel, underground space sector released

The project which is in the Guangdong-Hong Kong-Macao Greater Bay Area. The model helps make tunnel construction safer, higher-quality, more efficient and ... More Information

BMC Begins Major Water Supply Upgrade Mumbai

The project commenced in 2023 and has adopted tunnel boring machine (TBM) technology to minimise surface disruptions in crowded neighbourhoods. Of ... More Information

Slurry tunnel boring machines to be deployed for Bengaluru Twin Tunnel Road Project

B-SMILE opts for slurry TBMs over hard rock TBMs for Twin Tunnel Road project in Bengaluru due to mixed terrain... More Information

Tunnel along railway linking Shenzhen and Shanwei special cooperation zone under construction

Technicians check a tunnel boring machine (TBM) at the construction site of a tunnel in Pingshan, Shenzhen City, south China's Guangdong Province, Aug ... More Information

Construction staging area approved for Nashville's airport tunnel project

The Music City Loop will be a 10 mile tunnel connecting downtown Nashville to the Nashville International Airport (BNA)... More Information

Zojila tunnel deadline pushed to 2028: Here's why Asia's longest tunnel project is delayed

Zojila Tunnel Latest Update: On completion, the project will not only play an important role in the country's infrastructure development but also ... More Information

W.A. Rasic Construction Awarded Major Subcontract on Dragados' $630M Effluent Outfall

The tunnel project is a critical component of Southern California's long-term infrastructure resilience strategy. The project directly supports the ... More Information

VDOT gives HRBT expansion update

Construction on the Hampton Roads Bridge-Tunnel Expansion Project hit key milestones as tunneling progresses and traffic shifts to new lanes. More Information

HS2 lifts third TBM following 3.4-mile journey

HS2 Ltd has lifted Tunnel Boring Machine Emily's 9.11-metre diameter cutterhead, front and middle shield, weighing 880 tonnes, from below the ... More Information

Musk's Boring Company unveils Music City Loop tunnel project for Nashville

The big picture: The project has an ambitious timeline of completing the 10-mile route in less than two years. The tunnel would move vehicles at warp ... More Information

Progress Update on East Dallas Tunnel Project to Address Flooding Problems

With so much rainfall throughout the metroplex, NBC 5 wanted an update on a project expected to mitigate flooding in East Dallas... More Information