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Device used to excavate tunnels
A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels. TBMs are an alternative to drilling and blasting methods
Tunnel_boring_machine
17.5 metres diameter tunnel boring machine
5 m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) Alaskan Way Viaduct replacement tunnel project
Bertha (tunnel boring machine)
Bertha_(tunnel_boring_machine)
American infrastructure and tunneling company
overall and won the innovation award. TBC's first boring machine was Godot, a conventional tunnel boring machine (TBM) made by Lovat. Godot was followed by Prufrock
The_Boring_Company
Tunnel for testing Loop-based transportation
dismantled in 2022. The single-bore tunnel was constructed during using a 14-foot (4.2 m) diameter tunnel boring machine, giving a finished 12-foot (3
Hawthorne_test_tunnel
Undersea rail tunnel linking France to the UK
Hemphill, Gary B. (2012). "Chapter 7 Tunnel-boring machines: History of tunnel-boring machine". Practical Tunnel Construction. Hoboken, New Jersey: John
Channel_Tunnel
Highway tunnel in Seattle, Washington
agreed to a deep-bore tunnel. Construction began in July 2013 using "Bertha", at the time the world's largest-diameter tunnel boring machine. After several
State_Route_99_tunnel
Protective structure used during the excavation of tunnels
workface into overlapping portions that each worker could excavate. A tunnel boring machine (TBM) consists of a shield (a large metal cylinder) and trailing
Tunnelling_shield
Infrastructure project in Maharashtra, India
tunnel boring machine. In December 2025 and April 2026, The Indian Express reported milestones relating to the deployment of a tunnel boring machine named
Thane–Borivali_Twin_Tunnel
Topics referred to by the same term
Boring machine may refer to: Boring machine (carpentry) A machine for boring (manufacturing) holes Tunnel boring machine A machine that is not very exciting
Boring_machine
Vehicle that moves through solid rock or soil
such machines has declined with the advent of the real-world tunnel boring machines, which demonstrate the reality of the boring task. Tunnel boring machine
Subterrene
shotcrete used in the new Austrian tunnelling method, use of a tunnel boring machine (TBM) or tunnelling shield. But still tunnels are constructed which are secured
Tunnel_construction
German tunnel boring machine manufacturer
Herrenknecht AG is a German company that manufactures tunnel boring machines (TBMs). Headquartered in Allmannsweier, Schwanau, Baden-Württemberg, it is
Herrenknecht
Tunnel boring machine
The Martina tunnel boring machine (officially named as the S-574.) is a hard rock tunnel boring machine built by Herrenknecht AG. It is the largest hard
Martina (tunnel boring machine)
Martina_(tunnel_boring_machine)
New York City Subway line
double-tracked along its entire length, with tracks in parallel tubes bored by tunnel boring machines, and central island platforms at all stations. North of 96th
Second_Avenue_Subway
Tunnel in Mexico
in the world. It was constructed between 2008 and 2019 using a tunnel boring machine. Serving a population of 20 million, it runs from Mexico City to
Emisor_Oriente_Tunnel
High-speed railway tunnel between Sants and La Sagrera, Barcelona
Sants-Sagrera tunnel were as follows: Phase 1: boring of the tunnel by the Barcino tunnel boring machine (A) and placement of the segments by the same tunnel boring
Tunnel_of_Provença
Highway in the Seattle metropolitan area, Washington, U.S.
the launch pit before tunnel boring began on July 30—setting a record for the world's largest tunnel boring machine. Tunnel boring was halted at 1,028 feet
Washington_State_Route_99
Bridge–tunnel spanning the mouth of the Chesapeake Bay in Virginia
of soil to be removed by the tunnel boring machine (TBM) is 500,000 cubic yards (380,000 m3). Concrete sections: The tunnel will consist of approximately
Chesapeake_Bay_Bridge–Tunnel
Topics referred to by the same term
drilling a hole, tunnel, or well in the earth Tunnel boring machine, a machine used in boring tunnels Boring (manufacturing), enlarging a hole that has already
Boring
Movie theatre in San Francisco, California, U.S.
dismantled and stored. The site was reclassified as the Central Subway Tunnel Boring Machine Extraction Site Special Use District in 2013 by the San Francisco
Pagoda_Palace
Railway project in London, England
Street and Shenfield. 21 km (13 miles) of twin-bore tunnels were constructed by tunnel boring machines (TBM), each with an internal diameter of 6.2 m
Crossrail
Tunnel construction technique
driving the tunneling machine, so they have to be remotely operated. Microtunnel boring machines (MTBM) are similar to larger tunnel boring machines (TBMs)
Microtunneling
Largest tunnel boring machine in the world
The Beck tunnel boring machine (alternately Big Becky) was the largest tunnel boring machine in the world, when it was operated by Ontario Power Generation
Beck_tunnel_boring_machine
Twin-bore tunnel for HS2 railway
permission did not apply. The two Herrenknecht tunnel boring machines (TBMs) used to construct the tunnel were named Mary Ann, after Mary Ann Evans (with
Bromford_Tunnel
Tunnel in Miami, Florida
began in May 2010. The tunnel boring machine began work in November 2011 and completed the second tunnel in May 2013. The tunnel was opened to traffic
Port_Miami_Tunnel
Underground rail line in Melbourne, Australia
first tunnel boring machine began to be assembled in North Melbourne in June 2019. In February 2020, TBM Joan completed the first section of the tunnel from
Metro_Tunnel
Underground passage made for traffic
earth pressure balance tunnel boring machine, with a 17.5-metre (57.5 ft) cutterhead diameter. After several delays, tunnel boring was completed in April
Tunnel
High-speed rail line under construction between Italy and France
coal-bearing schists that are poorly suited for a tunnel boring machine; it instead is being bored by a combination of jackhammering for the weakest rock
Turin–Lyon_high-speed_railway
Former elevated highway in Seattle, Washington
factions expressing their criticism over the tunnel decision. Boring of the tunnel by the tunnel boring machine "Bertha" began on July 30, 2013, with the
Alaskan_Way_Viaduct
World's largest tunnel boring machine, used for Hong Kong road infrastructure
the world's largest tunnel boring machine launched in June 2015 by Herrenknecht in Germany. The TBM was used to drill a 5 km tunnel connecting Tuen Mun
Tuen_Mun–Chek_Lap_Kok_TBM
High-speed rail project in England
would fund the tunnels. The 8.4-mile-long (13.5 km) Northolt tunnels were constructed with four tunnel boring machines (TBM); two tunnelling West to East
High_Speed_2
Rail project in Auckland, New Zealand
cut-and-cover and tunnel boring machine (TBM) methods depending on the location of construction. The ground through which the tunnels were built varies
City_Rail_Link
Engineering project
Niagara Tunnel was constructed using a Tunnel Boring Machine (TBM), affectionately named "Big Becky" in honour of Sir Adam Beck. The TBM machine bored a tunnel
Niagara_Tunnel_Project
Metro line in France
the construction of 11.8 kilometers (7.3 mi) of tunnel which will be dug by two tunnel boring machines, the construction of the Antonypôle, Massy Opéra
Paris_Metro_Line_18
Extension of the Bay Area Rapid Transit system into Santa Clara County
construction activities began in January 2019, with excavation of the tunnel boring machine entrance pit in progress as of late 2025. The Santa Clara Valley
Silicon_Valley_BART_extension
Basilica under construction since 1882 in Barcelona, Spain
2010, the tunnel boring machine reached the church underground under the location of the building's principal façade. Service through the tunnel was inaugurated
Sagrada_Família
Future subway line in the Philippines
one of the six tunnel boring machines in an acceptance test ceremony through a video conference. The first of 25 tunnel boring machines that will be used
Metro_Manila_Subway
Twin-bore tunnel for HS2 railway
has been envisaged that ten tunnel boring machines (TBMs) will be used to bore the 102 kilometres (63 mi) of tunnelling along the HS2 route between the
Euston_Tunnel
Railway tunnel in Perth
for the first tunnel was completed in June 2006, after which the tunnel boring machine was transported back to Elizabeth Quay to dig the second, which
William_Street_tunnel
Rapid transit line in Montreal, Canada
the new stations. In September 2023, construction tenders for the tunnel boring machine were called and an announcement was made that the opening date would
Blue_Line_(Montreal_Metro)
Pumped-hydro battery in New South Wales, Australia
by the end of 2028. The project is using three tunnel boring machines to dig tunnels. One of the machines, called Florence, was stuck for 19 months after
Snowy 2.0 Pumped Storage Power Station
Snowy_2.0_Pumped_Storage_Power_Station
Tunnel in Port Hedland, Western Australia
Hedland. The tunnel was constructed by a tunnel boring machine by Transfield and Kumagai Gumi for A$23.19 million. The Port Hedland Harbour Tunnel connects
Port_Hedland_Harbour_Tunnel
Large land vehicle
from the Landship Committee. The concept of a 1,000-ton armored, fighting machine on land quickly became too impractical and too costly for it to be realistically
Landship
Light rail line in Toronto, Ontario
long contest public contest to name the tunnel boring machines (TBM). "Metrolinx awards major tunnel-boring contract for light-rail expansion". Progressive
Line_5_Eglinton
Water-supply system
since 1997. The safety of the tunneling work has been improved with the use of tunnel boring machines to excavate the tunnel beginning in Stage 2 (compared
New York City Water Tunnel No. 3
New_York_City_Water_Tunnel_No._3
Process of excavating a vertical or near vertical tunnel from the top down
Recent innovations in the form of full-face shaft boring (akin to a vertical tunnel boring machine) have shown promise but the use of this method is,
Shaft_sinking
Topics referred to by the same term
engine), open source game engine Godot, the first tunnel boring machine for Elon Musk's The Boring Company All pages with titles beginning with Godot
Godot
Railway tunnel in Leipzig, Germany
2007 the tunnel boring machine called Leonie began (with a ceremony at the Bayerischer Bahnhof) to symbolically bore the first tunnel. The tunnel's godmother
Leipzig_City_Tunnel
Dam in Surkhet district
firm electricity. The project has a tunnel 12208 meters long that was constructed using a tunnel boring machine (TBM) for the first time in Nepal. The
Bheri Babai Diversion Multipurpose Project
Bheri_Babai_Diversion_Multipurpose_Project
Underground station in Perth, Western Australia
2018, the two tunnel boring machines (TBMs) reached the station after tunnelling from High Wycombe. The TBMs left the station tunnelling north-west in
Airport Central railway station
Airport_Central_railway_station
Mass Rapid Transit station in Singapore
25 July 2019, tunnelling works for the CCL6 started with the launch of the Tunnel Boring Machine at Keppel station. The TBM will tunnel from Keppel to
Keppel_MRT_station
Road tunnel in Crosses under the Elbe in Hamburg, Germany
Agency had helped in engineering aspects of the tunnel project for the tunnel boring machine. The centre bores carry reversible lanes which switch direction
Elbe_Tunnel_(1975)
Topics referred to by the same term
horror game Mole (unit), the SI unit for the amount of substance Tunnel boring machine Heat Flow and Physical Properties Package, a burrowing probe sent
Mole
Railway tunnel through the Swiss Alps
excavate most of the tunnel with traditional blasting methods and only drill a small part using a faster tunnel boring machine (TBM). Both the CBT and
Ceneri_Base_Tunnel
Under construction rapid transit railway line
2023, a tunnel boring machine, one of four tunnel boring machines, had completed the first 1.26 km section of its 5.5 km tunnel. Tunnelling is expected to
Sydney Metro Western Sydney Airport
Sydney_Metro_Western_Sydney_Airport
Railway station in Perth, Western Australia
February 2006, the tunnel boring machine (TBM) reached the station, having tunnelled from Esplanade station. From there, the TBM tunnelled north. The TBM
Perth Underground railway station
Perth_Underground_railway_station
Undersea railway tunnel in Japan
methods, including blasting with the New Austrian tunneling method (NATM) and tunnel boring machines (TBMs). A Shinkansen-capable cross section was selected
Seikan_Tunnel
Tunnel in North Yorkshire, England
developer was shortlisted for the work on the tunnel which was also envisaged as needing five Tunnel Boring Machines (TBMs). This was later reduced to three
Woodsmith_Mine_Tunnel
Road tunnel in Nordland county, Norway
(after Toven Tunnel, Korgfjell Tunnel, and Steigen Tunnel). The tunnel was the first in Norway to be made with the use of a tunnel boring machine with a diameter
Svartis_Tunnel
Chinese listed construction company
Engineering Equipment Group supplied the first commercial rectangular tunnel boring machine, used for an underpass of Singapore's Thomson–East Coast MRT line
China_Railway_Group_Limited
Polyhalite mine in North Yorkshire, England
"Strabag Yorkshire mine tunnelling contract extended". New Civil Engineer. Retrieved 13 April 2019. "First tunnel boring machine arrives". BBC News. 17
Woodsmith_Mine
Road tunnel in Genoa, Italy
two twin subsea tunnels, each with two traffic lanes. The tunnels, mechanically excavated using a large-diameter tunnel boring machine (approximately 16
Genoa_Subport_Tunnel
Road in New Zealand
of Herdman Street. As the Earth Pressure Balance tunnel boring machine (TBM) would be able to bore much closer to the surface than techniques assumed
Waterview_Connection
Tunnel under the East River in New York City
results of the report, released in January 1971, called for using tunnel boring machines underneath Central Park to reduce disruption. The following month
63rd_Street_Tunnel
British aristocrat
(1760–1843) the namesake son of Thomas Mudge, the horologist. A Tunnel Boring Machine is named after Sophia. Sophia Kingdom, later known as Lady Brunel
Sophia_Kingdom
Rail tunnel in Seattle, Washington, United States
segment from Westlake to the International District was bored with two tunnel-boring machines, heading north from Union Station and finishing within a
Downtown Seattle Transit Tunnel
Downtown_Seattle_Transit_Tunnel
Belgian engineer
Maus (1808–1893) was a Belgian engineer, the inventor of the first tunnel boring machine. Maus was born in Namur (then in Sambre-et-Meuse, French First Empire)
Henri_Maus
Undersea road tunnel under the Tangafjørður sound in the Faroe Islands
facilities and signposting took several months. Meanwhile, NCC moved the tunnel boring machine to Sandoyartunnilin, which started on 27 June 2019. While the expected
Eysturoyartunnilin
Light rail extension and tunnel in Seattle, Washington, U.S.
"Transit-tunnel machine reaches daylight at Roosevelt Station". The Seattle Times. Retrieved May 5, 2016. "Sound Transit tunnel boring machine reaches
Northgate_Link_tunnel
Rapid transit system in Doha, Qatar
Metro Gold Line. A total of 21 tunnel-boring machines from the German company Herrenknecht were planned for the tunnel construction of the Metro Phase
Doha_Metro
Tunnel under construction in England
that excavation had commenced. The boring process, which was largely performed by a pair of tunnel boring machines (TBMs), advanced at an average speed
Chiltern_Tunnel
Transit line in Kolkata, India
the tunnel boring machine as Prerna and Rachna inspired from the names of daughter of their employee. 2017-May 23: First TBM completes tunneling the East
Green_Line_(Kolkata_Metro)
Railway station in Perth, Western Australia
complete. The two tunnel boring machines (TBMs) reached the station in mid-2019, having tunnelled from High Wycombe, and left tunnelling towards Bayswater
Redcliffe_railway_station
Rail tunnel in France
of the tunnel. The tunnel was excavated by a tunnel boring machine between November 2011 and February 2013. Civil engineering work on the tunnel ended
Saverne_Tunnel
Topics referred to by the same term
resolution of 3840×2400 pixels Bertha (tunnel boring machine), nicknamed Big Bertha, a tunnel boring machine La Grosse Bertha (French for "Big Bertha")
Big_Bertha
2021), "Seattle's Latest Tunnel Boring Machine Will Dig 2.7 Miles", Engineering News-Record "Meet our tunnel boring machines". Ship Canal Water Quality
List_of_tunnels_in_Seattle
Light rail station in Seattle, Washington
five years of tunnel boring and station construction. It consists of a single island platform, divided into two sections by the twin bores of the Beacon
Beacon Hill station (Sound Transit)
Beacon_Hill_station_(Sound_Transit)
Australian feminist activist
former Prime Minister of Australia, Julia Gillard. A tunnel boring machine used to construct the tunneled portion of Melbourne's North East Link was named
Zelda_D'Aprano
Future rapid transit line in Toronto, Canada
took place on March 27, 2022. On April 20, 2026, tunnelling began using two tunnel boring machines. Upon opening, the plan is for the line to be designated
Ontario_Line
Mass Rapid Transit station in Singapore
Singapore's first use of a rectangular tunnel boring machine (TBM), a TBM that digs rectangular tunnels. The machine was used for a 150 m (490 ft) underpass
Havelock_MRT_station
Railway station in Perth, Western Australia
the tunnel boring machines (TBMs) that was used to bore the tunnels for the Airport line. This is accompanied by a sign explaining the tunnelling process
High Wycombe railway station, Perth
High_Wycombe_railway_station,_Perth
Rapid transit line in Metro Vancouver, Canada
Hall Station". Tunnel Business Magazine. Retrieved October 6, 2023. Chan, Kenneth (February 10, 2024). "Second tunnel boring machine for Broadway Subway
Millennium_Line
Rail tunnel in Seattle, Washington, United States
4 m) tunnels are lined with precast gasketed concrete segments connected with steel bolts and was excavated using three tunnel-boring machines in 2011
University_Link_tunnel
February 2024. "Herrenknecht to Supply Mumbai-Ahmedabad Bullet Train's Tunnel Boring Machines". 18 July 2023. Archived from the original on 19 February 2024.
List_of_longest_tunnels
Mass Rapid Transit station in Singapore
was necessary as tunnelling directly underneath the river would risk ground subsidence or tunnel flooding. The Tunnel Boring Machine (TBM) used could
Fort_Canning_MRT_station
Topics referred to by the same term
belief model, a mathematical theory on uncertainty Tunnel boring machine, used to excavate tunnels with a circular cross section Transports Bordeaux Métropole
TBM
Suburban rail service in Perth, Western Australia
and tunnel boring started in July 2017. The construction process was beset by several problems, including ground disturbances caused by tunnelling, a sinkhole
Airport_line,_Perth
Chinese construction company
well-known product is the Tunnel boring machine. As of 2025, the company has received more than 1,800 orders for shield machines and TBMs in total, with
China Railway Engineering Equipment Group
China_Railway_Engineering_Equipment_Group
Dutch heavy object transport equipment company
high-profile projects, including the transportation of a 600-tonne tunnel boring machine in London. The company also played a key role in the construction
Mammoet
Excavation equipment
spikes, compression fracture micro-wheel heads like those on larger tunnel boring machines, a slicer head like a gigantic chain saw for dicing up rock, or
Roadheader
Railway tunnel located in Western Massachusetts, United States
Patented Stone-Cutting Machine" (a tunnel boring machine) was used; it failed after excavating 10 feet (3.0 m) of rock. Tunnel builders resorted to hand
Hoosac_Tunnel
Railway line in Sydney, New South Wales, Australia
Circular Quay and 350 to Kings Cross branded as Airport Express. A tunnel boring machine was used for the construction. Manufactured by the German firm,
Airport_Link,_Sydney
Civil engineering company
Bartlett patented the bentonite-slurry shield tunnel boring machine (UK patent 1083322) and a trial length of tunnel was drilled successfully through poor ground
Mott,_Hay_and_Anderson
Underground, industrial funicular in Glarus, Switzerland
was built by Garaventa. A tunnel boring machine (TBM) with a diameter of 8 metres (26 ft) was used to excavate the tunnel. "30-SPB Tierfehd-Maschinenkaverne
Standseilbahn_Linth-Limmern
Sewage infrastructure project in New Zealand
will be via a tunnel boring machine. Sixteen access shafts, up to 78 metres (256 ft) deep, will be constructed. The route will take the tunnel 15 metres (49 ft)
Central_Interceptor
Vehicular tunnel in Colorado
killed boring the first tube and four in boring the second. Further complicating construction, the boring machines could not work as fast as expected at
Eisenhower_Tunnel
Rapid transit line in Toronto, Ontario
and extraction shafts, tunnels, as well as headwalls for emergency exit buildings and stations supply of tunnel boring machines and installation of segmental
Line_2_Bloor–Danforth
Political subdivision of Virginia
held in October of 2017. The new tunnel is being constructed using a tunnel boring machine nicknamed "Chessie". Boring operations began in February of
Chesapeake Bay Bridge and Tunnel District
Chesapeake_Bay_Bridge_and_Tunnel_District
Under construction rapid transit line in Melbourne, Australia
the excavation of the Box Hill SRL station, the preparation of a tunnel boring machine (TBM) launch site at Burwood, and the moving of water, sewerage
Suburban_Rail_Loop_East
December 2015. Retrieved 2015-12-27. "The World's Largest EPB Shield Tunneling Machine". Hitachi Zosen Corporation. Retrieved April 29, 2016. "2017 Manufacturer
List_of_largest_machines
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