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Risultato della ricerca immagini di Google per http://www.wsdot.wa.gov/projects/viaduct/Media/Default/Page/tunneling_tbm_diagram_large.jpg

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La fresa Tbm sta arrivando in Sicilia - Malgrado Tutto Web | Sito Ufficiale

La fresa Tbm sta arrivando in Sicilia - Malgrado Tutto Web | Sito Ufficiale | CLIL | Scoop.it
Iniziano ad arrivare a Caltanissetta i pezzi della grande fresa Tbm che scaverà e realizzerà la lunga galleria. Sicurezza, formazione e legalità tra gli obiettivi della Cmc in Sicilia
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Tunnel Boring Machine Parts, Tunnel Boring Machine Parts Products, Tunnel Boring Machine Parts Suppliers and Manufacturers at Alibaba.com

Tunnel Boring Machine Parts, Tunnel Boring Machine Parts Products, Tunnel Boring Machine Parts Suppliers and Manufacturers at Alibaba.com | CLIL | Scoop.it
Tunnel Boring Machine Parts, You Can Buy Various High Quality Tunnel Boring Machine Parts Products from Global Tunnel Boring Machine Parts Suppliers and Tunnel Boring Machine Parts Manufacturers at Alibaba.com...
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YouTube

YouTube | CLIL | Scoop.it
Share your videos with friends, family, and the world
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Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ull...

Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ull... | CLIL | Scoop.it
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Tunnel boring machine - Wikipedia, the free encyclopedia

A tunnel boring machine (TBM) also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameters can range from a metre (done with micro-TBMs) to 19.25 m to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs.

Tunnel boring machines are used as an alternative to drilling and blasting (D&B) methods in rock and conventional "hand mining" in soil. TBMs have the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in heavily urbanized areas. The major disadvantage is the upfront cost. TBMs are expensive to construct, and can be difficult to transport. However, as modern tunnels become longer, the cost of tunnel boring machines versus drill and blast is actually less—this is because tunneling with TBMs is much more efficient and results in a shorter project.

The largest diameter TBM, at 19.25 m, built by Herrenknecht AG for a recent project in Orlovski Tunnel, St.Petersburg. The machine was built to bore through soft ground including sand and clay. Herrenknecht AG built also the world's largest diameter hard rock TBM: "Martina" (excavation diameter of 15.62 mt, total length 130 mt; excavation area of ​​192 square mt, thrust value 39,485 t, total weight 4,500 tons, total installed capacity 18 MW; yearly energy consumption about 62,000,000 kWh) is owned and operated by the Italian construction company Toto S.p.A. Costruzioni Generali (Toto Group) for the Sparvo gallery of the Italian Motorway Pass A1 ("Variante di Valico A1"), near Florence.

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Raddoppio 640: ė arrivata la fresa Tbm per lo scavo della galleria “Caltanissetta” | il Fatto Nisseno

Raddoppio 640: ė arrivata la fresa Tbm per lo scavo della galleria “Caltanissetta” | il Fatto Nisseno | CLIL | Scoop.it
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Fossil Rock Anthem

The song parodies "Party Rock Anthem" by LMFAO. The instrumental was made by DJ Lisan (www.soundcloud.com/dj-lisan) in San Francisco. Female vocals by Nicole...
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fresatrice tbm usata per tunnel ferroviario

Fresatrice tbm, usata per scavare il tunnel ferroviario Alptransit in Svizzera. www.alptransit.ch
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How a Tunnel-Boring Machine Drills Underground

Video courtesy of CDM/HMM Joint Venture - For engineering enthusiasts and anyone who's interested in the mechanics of siphon construction, this animation sho...
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Gizmag goes inside the world's largest tunnel boring machine

Gizmag goes inside the world's largest tunnel boring machine | CLIL | Scoop.it
On Saturday,the world's largest tunnel boring machine was dedicated in the city of Seattle. “Bertha,” as it’s known, will spend the next 14 months boring a ...
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Tunnel boring machine - Wikipedia, the free encyclopedia

A tunnel boring machine (TBM) also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameters can range from a metre (done with micro-TBMs) to 19.25 m to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs.

Tunnel boring machines are used as an alternative to drilling and blasting (D&B) methods in rock and conventional "hand mining" in soil. TBMs have the advantages of limiting the disturbance to the surrounding ground and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in heavily urbanized areas. The major disadvantage is the upfront cost. TBMs are expensive to construct, and can be difficult to transport. However, as modern tunnels become longer, the cost of tunnel boring machines versus drill and blast is actually less—this is because tunneling with TBMs is much more efficient and results in a shorter project.

The largest diameter TBM, at 19.25 m, built by Herrenknecht AG for a recent project in Orlovski Tunnel, St.Petersburg. The machine was built to bore through soft ground including sand and clay. Herrenknecht AG built also the world's largest diameter hard rock TBM: "Martina" (excavation diameter of 15.62 mt, total length 130 mt; excavation area of ​​192 square mt, thrust value 39,485 t, total weight 4,500 tons, total installed capacity 18 MW; yearly energy consumption about 62,000,000 kWh) is owned and operated by the Italian construction company Toto S.p.A. Costruzioni Generali (Toto Group) for the Sparvo gallery of the Italian Motorway Pass A1 ("Variante di Valico A1"), near Florence.

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Raddoppio 640: ė arrivata la fresa Tbm per lo scavo della galleria “Caltanissetta” | il Fatto Nisseno

Raddoppio 640: ė arrivata la fresa Tbm per lo scavo della galleria “Caltanissetta” | il Fatto Nisseno | CLIL | Scoop.it
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