TBM stands for Tunnel Boring Machine, a massive piece of equipment used to excavate tunnels for various underground construction projects such as subway systems, pipelines, and transportation tunnels. TBMs work by using a rotating cutter head equipped with cutting tools to bore through soil, rock, and other geological formations. As the cutter head rotates, it grinds away the material, which is then transported out of the tunnel via a conveyor system or other means. TBMs also typically have supp