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	Tunnel boring machine - Wikipedia, the free encyclopedia
		A tunnel boring machine that was used at Yucca Mountain.
		Tunnel boring machines (TBM) are used to excavate tunnels with a circular cross section through a variety of geologies.
		Tunnel boring machines are used as an alternative to drilling and blasting (DandB) methods.
	en.wikipedia.org /wiki/Tunnel_boring_machine (766 words)

	Boring - Wikipedia, the free encyclopedia
		Tunnel boring machine (TBM), a machine used in the boring of tunnels or shafts
		Machines for boring holes in engineering materials such as metal and concrete are sometimes incorrectly called drills or drilling machines.
		Boring is different from drilling in that it uses a single cutting point revolving around a fixed axis to create a round hole.
	en.wikipedia.org /wiki/Boring (212 words)

	Traylor Bros., Inc. Tunnel Boring Machine (Site not responding. Last check: 2007-11-07)
		TBM is a circular cutting head for excavating a tunnel in such a way that the rock to be removed is disintegrated by continuous rotation of a group of cutting tools thrust against the surface of the rock at the working face.
		The tunnel muck then passes on a series of conveyors to the back of the tunneling machine where it is discharged into the final transportation system out of the tunnel.
		All TBM's must be able to grip the walls of the tunnel as the cutter head advances or have the ability to push off of the previously installed ground support.
	www.traylor.com /pages/tunnels/tbm.html (370 words)

	The TBM and Its Role in Creating an Underground Laboratory
		Tunnel boring was the most efficient and ultimately the most environmentally sound and physically safe method for gaining access to the underground environment found at Yucca Mountain.
		From the rear of the TBM to the outside of the tunnel.
		An elevated platform that moves with the TBM to all the roof of the tunnel to be mapped.
	www.ocrwm.doe.gov /factsheets/doeymp0001.shtml (1084 words)

	Alptransit \| Aktuell
		In the east tunnel, tunnel boring machine Gabi I traversed the approximately 50 metres length of this zone without problem and is now boring at a daily rate of between 10 and 20 metres towards Sedrun.
		The deformations in the west tunnel and consequent realignment of forces in the rock caused additional deformations in the parallel east tunnel, which therefore also had to be repaired along a length of approximately 300 metres.
		Tunnel boring machine Gabi II will resume driving in the west tunnel at the end of March 2005 and tunnel boring machine Gabi I in the east tunnel in mid-April 2005.
	www.alptransit.ch /pages/e/aktuell/pressemitteilung.php?jahr=2005 (3614 words)

	Dulce New Mexico Underground Base (Site not responding. Last check: 2007-11-07)
		Six of the machines are digging the submarine tunnel between the Dover Strait and Pas de Calais and five are digging the land tunnels leading away from the channel to aboveground terminals.
		The machines bore the hole, remove the earth, and pave the inside of the tunnel with precast concrete segments.
		Tunnel boring is undergoing a boom according to a recent article in the Wall Street Journal (Dec. 12, 1990).
	www.subversiveelement.com /Dulce.html (5725 words)

	Road Traffic Technology - Uetliberg Tunnel - Switzerland
		The tunnel seal in the Uetliberg cross-section is drained and unpressurized due to the dry molasse.
		In addition, a Tunnel Bore Extender (TBE) is braced in the pilot tunnel and used to widen the pilot tunnel to the full cross-section diameter of 14.4m.
		Where the TBM is operating in the molasse sections of the tunnel, all spoil can be taken straight from the working face via a continuous belt system 1,760m in length taking material to a rail loading area in the Filderen area.
	www.roadtraffic-technology.com /projects/uetliberg_tunnel (1016 words)

	Tunnel Boring Machine
		The TBM is the key piece of machinery that will be used to make the 3-mile long, 26-foot diameter, 250-foot deep Phase I CSO tunnel.
		Numerous discs are mounted on the TBM cutterhead, a cutting wheel roughly the same diameter as the tunnel excavation.
		The main spine tunnel will be supported by precast concrete rings which are assembled inside of the shield, then expanded to fit the tunnel excavation as the shield moves forward and the rings come out of the tail.
	www.narrabay.com /TBM.asp (512 words)

	LOVAT Inc.- Services (Site not responding. Last check: 2007-11-07)
		The TBM is to be used to bore the 2,250 meter Krolsky Tunnel, through a combination of Slates, Limestone and Granite.
		Boring through a very mixed stratum, consisting of schist, sand, clay and sandy clay, the entire tunnel alignment is being constructed beneath the ground water table, with an expected water pressure of about 1 bar, at the tunnel crown.
		The construction of the tunnel is to replace the existing 54 inch line, which involves the installation of the 66 inch pipe, within the primary lining.
	www.lovat.com /releases.html (2603 words)

	Lovat Inc. - News - Releases
		The LOVAT TBM is to bore through a geological profile consisting of: 1,100 foot section of fresh to slightly weathered limestone, with a UCS from 75 Mpa (10,850 psi) to 150 Mpa (22,000 psi).
		The machine is to bore 8,600 metres of tunnel on the Ankara Metro Sogutozu-Kizilay section.
		The 5.89 metre tunnel boring machine is to bore and erect 8,600 metres of tunnel, on the Ankara Metro Sogutozu-Kizilay section.
	www.lovat.com /MS/MS1/page.php?p=29 (8127 words)

	Forages souterrains Nella inc. - Other Techniques - Trenchless technologies; horizontal directional drilling , ... (Site not responding. Last check: 2007-11-07)
		The tunnel boring machine is composed of a steel cylinder equipped with a hydraulic excavator in the front.
		As the excavation work progresses, the tunnel borer is pushed forward while a liner plate is installed in the rear section of the tunnel borer.
		The tunnel boring machine is first of all driven into the ground supported by the concrete conduits, which are pushed directly behind it using the jacking station.
	www.nella-drilling.com /eng/autrestech.html (746 words)

	Mining Technology - Wirth Opens New Ways
		It became official in October: the WIRTH Group is building the tunnel boring machine for the new Schlüchtern Tunnel.
		The Wirth tunnel boring machine (TBM) for the new Schlüchtern Tunnel is being specially designed and built to cope with the difficult geological conditions of the project site.
		WIRTH - Tunnel Boring Machines, Raise Boring and Full-Face Shaft Boring Machines
	www.mining-technology.com /contractors/tunnelling/wirth2/press3.html (305 words)

	Tunnel Boring Machines and equipment for the underground excavation industry. The Robbins Company
		Tunnel Boring Machines and equipment for the underground excavation industry.
		Mechanical rock excavation is a continuous process whereby rock is "cut" from the tunnel face and removed by conveyor or train from the tunnel.
		TBMs are used to excavate circular cross-section tunnels through a wide variety of geology, from soils to hard rock.
	www.robbinstbm.com (352 words)

	State-of-the-art tunnel boring machine set to carve out Queens water tunnel (Site not responding. Last check: 2007-11-07)
		NEW YORK -- One of the world's largest tunnel boring machines is being used to dig five miles of a 16-mile tunnel for water supply that is part of the most expensive public works project in the history of New York City.
		The tunnel is designed to improve water distribution to a major section of the city that currently uses some 200 million cubic feet of water per day.
		As the water tunnel will be lined with concrete, much less concrete is needed to line a smooth bored tunnel than a rough, jagged one, according to the engineers.
	www.uswaternews.com /archives/arcsupply/6staart.html (525 words)

	It's the tunnel maker -- you can't miss it
		A tunnel boring machine that arrived in pieces Monday on the Seattle waterfront will be the length of a football field when it is assembled near Interstate 5 over the next two months.
		After the boring machine is assembled, it will be "walked" a short distance on a cribbage boardlike slab to the west side of Beacon Hill at the "West Portal" to begin munching.
		The boring machine itself is 40 feet long, but support equipment up to 300 feet long will trail behind as it chews its way through Beacon Hill.
	seattlepi.nwsource.com /transportation/232339_soundtransit13.html (633 words)

	DJC.COM: TUNNEL BORING MACHINE HEADED FOR JAPAN, provided by Seattle Daily Journal of Commerce (Site not responding. Last check: 2007-11-07)
		KENT -- A tunnel boring machine to be used on a hydropower project in northern Japan was presented to its new owner in a sake ceremony.
		The machine is 27 feet in diameter, weights 800 tons and places 2.6 million pounds of pressure on the rock face.
		A Robbins TBM is now being assembled in England for use on a New York City sewer tunnel.
	www.djc.com /news/ma/10007031.html (367 words)

	Tunnel Boring Machine begins digging under Perth city
		The 60m-long TBM was specifically made for this project by Mitsubishi Heavy Industries in Japan.
		The tunneling program was slightly delayed by technical issues associated with the commissioning of the TBM.
		"The TBM operates by applying pressure to the excavation face ahead of the machine while soil is removed at a carefully controlled rate," Ms MacTiernan said.
	www.pta.wa.gov.au /scripts/viewarticle.asp?NID=1971 (379 words)

	Tunnel Boring Machine To Eliminate Austin's Sanitary Sewer
		The tunnel is bounded within right-of-way limits of existing surface streets, minimizing land acquisitions and ensuring zero impact to the neighborhood, traffic or the creek.
		Also, construction shafts at each end of the tunnel are located on undeveloped property, further keeping the project out of the public eye.
		The project also includes open cut construction of 3,700 linear feet of 60-inch wastewater interceptor, allowing AWU to abandon a similar length of deteriorated pipeline and lay the groundwork for a city park near one of the construction shafts.
	www.publicworks.com /content/news/article.asp?docid={6FCD58CE-C89E-4563-84F9-C28D7A2A95A9}&VNETCOOKIE=NO (558 words)

	King County Wastewater Treatment Division
		Boring started at the west tunnel entrance, or 'West Portal' located at 545 Elliot Avenue West, in May of 2001.
		The TBM bored underneath Mercer Street to reach its destination, the East Portal, located at the intersection of Roy Street and 8th Avenue North in the South Lake Union area.
		The tunnel is 15 feet in diameter, which makes it the largest pipe in King County's wastewater collection system.
	dnr.metrokc.gov /WTD/dennyway/tbm.htm (323 words)

	Mining Technology - Alimak Lift in Tunnel Boring Machine Breaking All Records
		The unique machine is being used to bore the 3.65km long north tunnel on the new M-30 urban motorway around Madrid, Spain.
		Since the mega TBM is the world's largest, the manufacturer knew it would draw a lot of attention, and thus a lot of visitors.
		The lift, installed in the rear of the TBM, is a standard ALIMAK SE-450 DOL with a capacity of 450kg and a lifting height of 9m.
	www.mining-technology.com /contractors/winding/alimak/press4.html (624 words)

	NIAGARA TUNNEL PROJECT
		This third tunnel project is expected to be one of the largest tunnels built in North America.
		The Tunnel Boring Machine (TMB) to be used on the Niagara Tunnel project will be 14.4 meters (47.2 feet) in diameter and will be one of the largest to be used in the world.
		In comparison the Robbins TBM will be 2½ times the size of the Toronto subway tunnel and 1½ times the size of the English Channel tunnels.
	www.niagarafrontier.com /tunnel.html (3170 words)

	MPR: Twin Cities 'Tremors'
		Mosites says the business end of the tunnel boring machine is a rotating wheel 21 feet in diameter with blades.
		The tunnel-boring crew includes a driver who Mosites says sits in a room near the front end of the machine, at a keyboard, with a global positioning system and a screen displaying a target that guides the progress of the machine.
		The two tunnels and two underground stations at the airport will cost about $142 million, making it the most expensive portion of the $675 million Hiawatha light-rail project.
	news.minnesota.publicradio.org /features/200108/16_olsond_tunnel (680 words)

	SIGHTINGS
		This is a U.S. Air Force Tunnel Boring Machine, at Little Skull Mountain, in the State of Nevada, U.S.A. It is tangible proof that the U.S. military has tunnel boring machines.
		This is a view of a tunnel under construction for the New Waddell Dam Central Arizona Projects Tunnels.
		Tunnels could be driven beneath the sea floor, extending hundreds of miles up and down the Atlantic, Pacific and/or Gulf of Mexico Coasts.
	www.rense.com /ufo/boringmachine.htm (637 words)

	BBC NEWS \| UK \| England \| Kent \| Tunnel boring machine sparks row
		Plans to exhibit a huge boring machine used to build the Channel Tunnel are causing controversy in Kent.
		Another of the 580-tonne boring machines used in the project is already on display in Coquelles, France.
		Mr Wallace added that the "striking machine" would be ideally suited for an industrial estate, science museum or should be placed nearer the entrance to the tunnel.
	news.bbc.co.uk /go/rss/-/2/hi/uk_news/england/kent/4574731.stm (283 words)

	EES-11 - LANL (Site not responding. Last check: 2007-11-07)
		To characterize the seismic wave field associated with hard rock tunneling and associated activities, 14 seismic stations were deployed in and near a tunnel being bored by a tunnel boring machine (TBM) for a water project near Boston.
		The 5.15 m tunnel is being bored through granitic and metamorphic rocks at a depth of about 125 m.
		During one 8-hour work shift, a short-period and broadband sensor pair were deployed inside the tunnel, about 35 m behind the TBM.
	www.lanl.gov /orgs/ees/ees11/geophysics/Posters/Lee3/ch1.html (132 words)

	Tunnel Boring Machine B6 For Sale: Science Fiction in the News
		For a fanciful look at how a tunnel-boring machine could be used as a recreational vehicle, see the mole from Oath of Fealty, a 1981 novel by Jerry Pournelle and Larry Niven.
		The Tunnel Boring Machine B6 was one of eleven machines used to dig out the Eurotunnel.
		The first plans for a tunnel were put forward in 1802 by French mining engineer Albert Mathieu.
	www.technovelgy.com /ct/Science-Fiction-News.asp?NewsNum=83 (261 words)

	ESA Portal - Improving Daily Life - Space engineering helps drill better holes in planet Earth
		Trude, the world´s largest tunnel boring machines (TBMs) with a diameter of 14.2m, excavated the 4th pipe Elbe Tunnel in Hamburg, Germany.
		The German tunnelling company, Herrenknecht AG, responsible for this achievement is now applying a new technique with space origin in order to be able to drill tunnels even better.
		This tunnel was drilled by Herrenknecht AG using a tunnel boring machine (TBM) with new transmitters spun-off from European space programmes.
	www.esa.int /esaCP/SEMCJSXO4HD_Improving_1.html (469 words)

	Detroit River Project Tunnel Boring Machine (Site not responding. Last check: 2007-11-07)
		This project was completed for Construction Tunneling Services and had a time span of just over 9 months, using a total of 33,289 man hours.
		MI, to be used in the Detroit River Project, was 24’ diameter, (retrofitted from a 21’ diameter TBM Petersen Inc. previously built – one of two used in the LA subway system.) and a football field in length.
		After this TBM was used and had completed the Detroit River Project, it was permanently entombed in a side tunnel.
	www.peterseninc.com /projectpage.asp?projectID=4 (217 words)

	Name the Tunnel Boring Machine Contest (Site not responding. Last check: 2007-11-07)
		So we invite you to give this machine a new name before it gets down to work digging the light rail tunnel through Beacon Hill.
		If the name you come up with is selected, not only will the tunnel boring machine bear your name, you will also win a cool prize donated by the Obayashi Corporation.
		The winning name will be announced at the kickoff event for the digging of the Beacon Hill Tunnel for Link light rail in fall 2005.
	www.soundtransit.org /kids (164 words)

	Herrenknecht AG - Pressearchiv: Jahresübersicht (Site not responding. Last check: 2007-11-07)
		The Herrenknecht tunnel boring machine (TBM) for the Metro Line 9 in Barcelona is the world´s largest Earth Pressure Balanced Shield with a diameter of 12.06 m.
		The tunnelling team of the JV MaTrans excavated and completed a section of 40.5 meters at the Lötschberg Basis Tunnel in Switzerland (section Steg) through Swiss hard rock (biotite gneiss) within 20 hours using a Herrenknecht Gripper TBM (Ø 9.43 m).
		In combination with the tunneling process on the South side, Herrenknecht tunnel boring machines will have excavated a total of 75.25 kilometers of tunnel through the Gotthard massive.
	www.herrenknecht.de /en/4_news/html/pressearchiv_j.php3?jahr=2002 (1008 words)

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