Tunnel boring machine - Wikipedia
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 may also be used for microtunneling.
(NTBM) Nuclear Tunnel Boring Machines – Switzerland Has ...
Trans-Planetary Subway Systems (Rand Corporation PDF)The first section of this page was written by Phil Schneider: Photo of United States Air Force tunnel boring machine at Little Skull
Tunnel - Wikipedia
A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
FAQ — The Boring Company
First, reduce the tunnel diameter. The current standard for a one-lane tunnel is approximately 28 feet. By placing vehicles on a stabilized electric skate, the diameter can be reduced to less than 14 feet.
Pilot Tube | ICON Pilot Tube Guided Auger Boring System
Pilot tube systems can reduce costs by 50% compared to laser controlled microtunneling systems. Learn more about ICON's guided auger boring systems today.
Elon Musk's Boring Company reveal first tunneling machine ...
Elon Musk's massive tunneling machine revealed: First picture shows 'Boring Company' plan to build traffic tunnels under LA is going ahead. Musk began digging a trench at SpaceX's headquarters in California after complaining about traffic
The Robbins Company - Official Site
Nepal’s first tunnel boring machine, a 5.06 m (16.6 ft) diameter Robbins Double Shield, is living up to the nation’s high expectations. The TBM, supplied in summer 2017 for the Bheri Babai Diversion Multipurpose Project (BBDMP), recently bored over 1, [...]
How tunnel is made - material, history, used, machine ...
A tunnel is an underground or underwater passage that is primarily horizontal. Relatively small-diameter ones carry utility lines or function as pipelines.
BUILDING BIG: Glossary - PBS: Public Broadcasting Service
Glossary. Abutment - the outermost end supports on a bridge, which carry the load from the deck. Aluminum - a lightweight chemical element (Al); the most abundant metallic element in the Earth's crust
Elon Musk's Tunnel Vision for Los Angeles - Bloomberg
Building a Boring Co. tunnel from Dodgers Stadium to LAX will require navigating mountains, oil fields and deep-pocketed neighbors.