Swing tunnel rock drill video tutorial

How do you dig a tunnel?

Dredge a trench when the tunnel will go. This method is similar to the cut-and-cover method, but is used for digging underwater tunnels. The trench needs to run the length the tunnel will run underwater. Lay a series of steel tubes along the length of the trench.

How do you build a tunnel?

Make your tunnel walls, lay them down, and cover the area back up again. Dredge an underwater trench for submerged tunnels. Lay down tubes with walls thick enough to handle the water's pressure. Or, set up a tunnel boring machine, which automatically digs and erects tunnel walls as it moves. Behind it, continue fastening tunnel supports as needed.

How do you excavate a tunnel?

Get the machine into position. For a surface level tunnel, this is no problem. If the tunnel is to be bored deep underground, an access shaft, usually circular, is drilled and lined with concrete. The TBM is lowered into it, and the tunnel is excavated from that point.

How do you choose a tunnel boring machine?

Choose the right tunneling machine for the job. Tunnel boring machines, called TBMs for short or “moles,” feature circular plates on the front called shields. Disc-shaped cutters on the shield tear through rock and dirt, which passes through openings in the shield onto a conveyor belt inside the TBM that deposit it behind the machine.

What is the difference between a railway tunnel and a roadway tunnel?

For roadway tunnels, this usually means ventilation shafts to prevent buildup of carbon monoxide. For railway tunnels, this can mean forced-air ventilation to remove diesel engine exhaust. Both feature supplemental methods to deal with the smoke created should a fire break out in the tunnel.