open-face-wheel mole

tunnel machine

Learn about this topic in these articles:

In tunnels and underground excavations: Soft-ground moles
The open-face-wheel type is probably the most common. In the wheel the cutter arm rotates in one direction; in a variant model it oscillates back and forth in a windshield-wiper action that is most suitable in wet, sticky ground. While suitable for firm ground, the open-face…
Read More