How Do You Build a Tunnel Under the Ocean?

Imagine driving beneath the ocean with hundreds of meters of water above your head. You cannot see the sea, but an entire body of water is moving overhead. So how do you build a tunnel where one mistake could let the water rush in? You’ll discover how engineers actually build tunnels beneath seas and rivers, from gigantic tunnel boring machines to massive concrete sections lowered into trenches. You’ll see why engineers study the seabed before they ever start digging, how watertight joints stop water from entering, and how the surrounding earth itself helps protect the tunnel. By the end, you’ll see underwater tunnels very differently. Like the video, share your thoughts in the comments, and subscribe for more fascinating explanations of how the world around you really works. #underwatertunnel #tunnelengineering #engineering #civilengineering #tunnelboringmachine #tbmm #underseatunnel #megaprojects #howitsmade #construction #engineeringexplained #infrastructure #scienceexplained #oceanengineering #tunnelconstruction #amazingengineering #howthingswork #youtubeexplainer underwater tunnels, how underwater tunnels are made, how do you build an underwater tunnel, how tunnels are built, undersea tunnel construction, underwater tunnel construction, tunnel boring machine, TBM, tunnel boring machine explained, immersed tube tunnel, immersed tunnel construction, tunnel engineering, civil engineering, civil engineering explained, underwater engineering, ocean engineering, seabed excavation, tunnel construction process, how tunnel boring machines work, how engineers build tunnels, underwater construction, mega engineering projects, amazing engineering, engineering explained, infrastructure, construction technology, watertight tunnel, tunnel waterproofing, tunnel lining, seabed engineering, river tunnel construction, sea tunnel, undersea construction, how things work, science explained