Skip to main contentAccessibility help
Accessibility feedback
Press / to jump to the search box
Choose what you’re giving feedback on
  • Delete
  • See more
  • Delete
    • See more
    • Report inappropriate predictions
    Quick Settings
    Sign in
    AI Mode
    All
    Images
    Videos
    News
    Shopping
    Forums
    More
    Tools

    Search Results

    Any time
    Any time
    Past hour
    Past 24 hours
    Past week
    Past month
    Past year
    Custom range...
    Custom date range
    Go
    All results
    All results
    Verbatim
    Advanced Search
    About 96 results (0.23s) 
    Ctrl+Shift+X to select
    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    Open TBMs (or Main Beam TBMs) are specialized machines designed for rapid excavation in stable, hard rock formations (e.g., granite, limestone). They feature an open design without a continuous shield, allowing direct access to the cutterhead for quick rock support installation, such as rock bolts or steel mesh. 
    Key Aspects of Hard Rock Open TBMs 
    • Methodology: These machines use a rotating cutterhead with disc cutters that break rock at the face, with debris removed via conveyors.
    • Gripper System: Open TBMs utilize hydraulic gripper plates that press against the tunnel sidewalls to stabilize the machine and provide thrust, eliminating the need for a shield.
    • Applications: They are ideal for long tunnel projects, such as hydro-power tunnels, water supply, and transportation tunnels in competent rock.
    • Performance: They are considered the fastest and most efficient option for healthy hard rock, frequently used to cut through high-strength, abrasive rock (e.g., over
      200
      MPa
       UCS).
    • Advantages: They allow immediate installation of rock support, improving safety and flexibility compared to shielded machines in similar rock. 
    Leading Manufacturers and Projects 
    • Robbins: Famous for its "Main Beam" TBMs, often used in large-scale projects, including in Norway and the US.
    • Terratec: Manufactures specialized, traditional Open TBMs for hard rock conditions.
    • Projects: These TBMs have been used in notable projects such as Malaysia’s 44.6 km long Pahang Selangor Water Tunnel. 
    For detailed information, you can explore the technical specs for Robbins Main Beam TBMs or Terratec Hard Rock TBMs. 
    • Main Beam TBM - Tunnel Boring Machines
      A Main Beam TBM's open design allows quick access directly behind the cutterhead for the installation of rock support (rock bolts,
      The Robbins Company
    • Shielded Hard Rock TBMs
      Oct 10, 2024 — efficient tunnel systems are an important prerequisite for mobility. and quality of life innovative mechanized tunneling technolog...
      7m
      YouTube·Herrenknecht AG
    • TBM Hard Rock - Terratec
      OPEN TBM. The Open TBM is the most traditional among the Hard Rock TBMs and is the fastest and most effective to bore tunnels in h...
      Terratec
    • Robbins Unveils Largest Hard Rock TBM in the United States
      Jan 8, 2020 — The TBM will first complete its 11.6 m (38.1 ft) diameter section of the alignment, then back up about 21 m (75 ft) to a transitio...
      Tunnel Business Magazine
    • 3 Ways to Bore More Efficiently in Extremely Hard Rock
      Aug 21, 2019 — This can be clearly seen in the data: For example, on an 8 m diameter cutterhead, the circumference is 25.12 m. At 10 RPM during T...
      The Robbins Company
    • Robbins Hard Rock TBMs: Return to Norway
      Aug 12, 2014 — 1950s. and we are making a new powerhouse uh including a new headrest tunnel and tail race tunnel. and putting in a new turbine wi...
      5m
      YouTube·TheRobbinsCo
    • Insights in Brief Archives - Robbins
      Jun 5, 2022 — Q: Could another type of TBM have been used in the geological conditions (limestone with karst)? A: It was a rather small diameter...
      The Robbins Company
    • TUNNELING WITH NATM / CONVENTIONAL AND TBM ...
      Jul 15, 2024 — TBM is used for tunnel construction in most of the infrastructure projects like, hydropower, sewerage, water supply, irrigation an...
      www.ijprems.com
    • Main Beam TBM - Tunnel Boring Machines
      A Main Beam TBM's open design allows quick access directly behind the cutterhead for the installation of rock support (rock bolts,
      The Robbins Company
    • Shielded Hard Rock TBMs
      Oct 10, 2024 — efficient tunnel systems are an important prerequisite for mobility. and quality of life innovative mechanized tunneling technolog...
      7m
      YouTube·Herrenknecht AG
    • TBM Hard Rock - Terratec
      OPEN TBM. The Open TBM is the most traditional among the Hard Rock TBMs and is the fastest and most effective to bore tunnels in h...
      Terratec
    Show all
    AI can make mistakes, so double-check responses
    Share
    Facebook
    WhatsApp
    X
    Email
    Click to copy link
    Share link
    Link copied
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedback
    Report a problem
    Close
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedback
    Report a problem
    Close
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedback
    Report a problem
    Close
    Show more
    My Ad Center

    Web results

    Main Beam TBM - Tunnel Boring Machines


    The Robbins Company
    https://www.robbinstbm.com › products › main-beam
    The Robbins Company
    https://www.robbinstbm.com › products › main-beam
    A Main Beam TBM's open design allows quick access directly behind the cutterhead for the installation of rock support (rock bolts, steel mesh, ring beams, and ...Read more
    Videos
    Shielded Hard Rock TBMs
    YouTube · Herrenknecht AG
    Oct 10, 2024
    YouTube · Herrenknecht AG
    8:52
    Single shield TBMs are all-rounders for tunneling in solid rock, transferring boring forces to segments via thrust cylinders.
    Herrenknecht AG
    YouTube·
    Oct 10, 2024

    Shielded Hard Rock TBMs

    YouTube·Herrenknecht AG·Oct 10, 2024
    YouTube
    TBM 2 Hard Rock
    YouTube · ggrasselli
    Mar 25, 2008
    YouTube · ggrasselli
    10:18
    Hard rock TBMs excavate through mountain ranges & under cities, installing ground support & disposing of material.
    ggrasselli
    YouTube·
    Mar 25, 2008

    TBM 2 Hard Rock

    YouTube·ggrasselli·Mar 25, 2008
    YouTube
    In this video
    • 01:57
      Types of TBMs
    • 02:20
      Gripper machine principle
    • 02:45
      Machine specifications
    • 03:14
      Working area
    • 03:35
      L1 work area
    • 04:38
      High tunnel performance
    • 06:05
      Shielded TBM performance
    • 06:35
      Guidance system
    • 07:20
      Cutterhead design
    • 08:56
      Double Shield TBM
    Robbins Hard Rock TBMs: Return to Norway
    YouTube · TheRobbinsCo
    Aug 12, 2014
    YouTube · TheRobbinsCo
    6:16
    Robbins TBMs were chosen for a hydro-electric plant in Norway due to their Hard Rock experience and efficiency over drill and blast.
    TheRobbinsCo
    YouTube·
    Aug 12, 2014

    Robbins Hard Rock TBMs: Return to Norway

    YouTube·TheRobbinsCo·Aug 12, 2014
    YouTube
    In this video
    • 00:18
      Project description
    • 00:35
      Project owner
    • 02:15
      Working with Robbins Field Service
    • 03:34
      Continuous conveyor system
    • 04:28
      Geology of the project
    • 04:57
      TBM excavation
    • 05:25
      Conclusion
    • 05:56
      Advantages of TBM
    View all

    Web results

    Hard Rock Open-Type Gripper TBM


    nhiglobalequip.com
    https://www.nhiglobalequip.com › product › hard-rock...
    nhiglobalequip.com
    https://www.nhiglobalequip.com › product › hard-rock...
    The hard rock double shield TBM is a high-performance tunneling machine designed for complex geological conditions, capable of operating in both hard and soft ...Read more

    TBM Hard Rock


    Terratec
    https://terratec.co › tbm-hard-rock
    Terratec
    https://terratec.co › tbm-hard-rock
    OPEN TBM. The Open TBM is the most traditional among the Hard Rock TBMs and is the fastest and most effective to bore tunnels in healthy Hard Rock formations.Read more

    Hard Rock Open TBM


    FeisTech International
    https://www.feistech.com › hard-rock-open-tbm-p00197p1
    FeisTech International
    https://www.feistech.com › hard-rock-open-tbm-p00197p1
    Hard Rock Open TBM manly consists of cutter, drive, shield, main frame, saddle, shoe spreader and back support, which applies to the work of rock tunnel boring.Read more

    performance-prediction-hard-rock-tbm.pdf


    Colorado School of Mines
    https://www.mines.edu › uploads › sites › 2018/07
    Colorado School of Mines
    https://www.mines.edu › uploads › sites › 2018/07
    PDF
    by J Rostami · 2016 · Cited by 285 — Basic concepts for operating TBMs are different between soft ground pressurized face machines and those of open face or rock machines. In soft ground tunnelling ...Read more
    10 pages

    Hard-Rock Tunnel Boring Machines


    Tunnel Business Magazine
    https://tunnelingonline.com › hard-rock-tunnel-boring-...
    Tunnel Business Magazine
    https://tunnelingonline.com › hard-rock-tunnel-boring-...
    Dec 23, 2014 — The first TBM intended to cut hard rock was the Wilson Patent Stone Cutting Machine. It was invented in 1851 and was mobilized to the east portal of the famous ...Read more

    Hard-rock TBM jamming subject to adverse geological ...


    ScienceDirect.com
    https://www.sciencedirect.com › article › abs › pii
    ScienceDirect.com
    https://www.sciencedirect.com › article › abs › pii
    by ZH Xu · 2021 · Cited by 123 — It is found that collapse of surrounding rocks is the most common hazard mode for TBM jamming, appearing in 52 cases. Secondly, Gaoligongshan Tunnel, one of the ...Read more

    World's First Full-face Hard-rock Shaft TBM Put into Operation


    中国中铁
    https://www.crecg.com › zgztywz
    中国中铁
    https://www.crecg.com › zgztywz
    The world's first full-face hard-rock shaft tunnel boring machine (TBM) was successfully used in a construction site for an exhaust shaft of the pumped-storage ...Read more
    Missing: Open ‎| Show results with: Open
    People also ask
    How much does a TBM tunnel boring machine cost?
    An error has occurred. Please try again later.
    What is the difference between TBM and NATM?
    TBM is used for tunnel construction in most of the infrastructure projects like, hydropower, sewerage, water supply, irrigation and transportation in various geological circumstances. NATM is based on the observational approach whole outcome depends on the geological interpretation and monitoring data.

    TUNNELING WITH NATM / CONVENTIONAL AND TBM ...


    ijprems.com
    https://www.ijprems.com › ijprems-paper › tunneling-wit...
    ijprems.com
    https://www.ijprems.com › ijprems-paper › tunneling-wit...
    How do TBMs work?
    At the front of the TBM, there is a cutterhead with cutter teeth and discs. The cutterhead rotates to excavate soil and rock (known as spoil) from the tunnel face. A series of conveyors move spoil from the front of the TBM to the back, and it is then removed from the tunnel.

    About the Tunnel Boring Machines (TBMs) | Torrens to Darlington


    River Torrens to Darlington Project
    https://www.t2d.sa.gov.au › about-tbms
    River Torrens to Darlington Project
    https://www.t2d.sa.gov.au › about-tbms
    What is hard rock tunneling?
    Rock tunnelling involves: Rock excavation – to make a hole. Rock support – to sustain the hole. Rock Excavation: Excavation technology is primarily driven by rock excavation machine technology. Rock Support: Support technology is largely driven by rock mechanics science together with support material technology.

    TUNNELLING IN ROCKS – PRESENT TECHNOLOGY AND FUTURE ...


    Mining and Blasting
    https://miningandblasting.wordpress.com › 2009/09 › tu...
    Mining and Blasting
    https://miningandblasting.wordpress.com › 2009/09 › tu...
    Images
    TBM Hard Rock - Terratec
    TBM Hard Rock - Terratec
    Terratec
    Hard Rock Open-Type Tunnel Boring Machine Manufacturers ...
    Hard Rock Open-Type Tunnel Boring Machine Manufacturers ...
    Heavy Equipment Manufacturer
    Schematics of an opening hard rock TBM. (1) Cutter head. (2 ...
    Schematics of an opening hard rock TBM. (1) Cutter head. (2 ...
    ResearchGate
    All images
    Show more images
    People also search for
    Hard rock open tbm price
    Hard rock open tbm cost
    Hard rock open tbm 2021
    Robbins TBM
    Single Shield TBM
    Tunnel boring machine price
    Double Shield TBM
    Main Beam TBM

    Page Navigation

    123456789Next

    Footer Links

    Los Angeles, California
     - From your IP address
     - 
    Update location
    Can't update your location
    Learn more
    Updating location...
    HelpSend feedbackPrivacyTerms
    Google apps