Tunnels are tricky business. You must first bore through the earth, then you either shore up your hole and begin walling it in, or do the digging and wall-building simultaneously using a huge Tunnel Boring Machine similar to the one munching its way beneath London, laying the foundation for the new Crossrail train system. But […]
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This “Zipper Truck” Can Build Tunnels at Nearly One Foot Per Minute [w/ Video]
