I'm proud of human beings for the invention of the Tunnel Boring Machine [TBM] that give another construction method on mega underground project. Tunnel Boring Machines excavate tunnels with a circular cross section through a variety of geologies. They can be used to bore through hard rock or sand and almost anything in between. Tunnel diameters can range from a metre to 15 metres. Tunnels of less than a meter or so in diameter are more likely typically done by horizontal direction drilling rather than by TBM.
Tunnels Boring Machines are used as an alternative to drilling and blasting methods. A TBM has the advantages of not disturbing surrounding soil and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in built-up areas. The key disadvantage is the cost. TBM are expensive to construct, difficult to transport and require significant infrastructure.
Watch the video clip below to get an idea on how this TBM work. Or you can simply assume that this machine act like an earthworm.
Tunnels Boring Machines are used as an alternative to drilling and blasting methods. A TBM has the advantages of not disturbing surrounding soil and producing a smooth tunnel wall. This significantly reduces the cost of lining the tunnel, and makes them suitable to use in built-up areas. The key disadvantage is the cost. TBM are expensive to construct, difficult to transport and require significant infrastructure.
Hydraulic Jacks Holding a TBM In Place Before Push It Forward.
Watch the video clip below to get an idea on how this TBM work. Or you can simply assume that this machine act like an earthworm.
