How Everything Works on Instagram: "It took Dutch engineers under 48 hours to put in a full highway tunnel. How long would it take in your country? #viral #explore"

Mehdi Hosseini on Instagram: "Tunnel Boring Machines (TBMs) are typically assembled in the drive shaft, where the machine is lowered and prepared for tunnelling operations. Once in position, the rotating cutter head at the front of the TBM excavates the ground, while the excavated material is transported away from the face through conveyor belts, screw conveyors, or slurry pipelines depending on the type of TBM used. The machine advances progressively as tunnel lining segments are installed behi