17/09/2026
How are underwater tunnels constructed? 🌊🏗️
Some underwater tunnels aren't drilled through the seabed at all. Engineers build massive concrete or steel tunnel sections, float them into position, sink them into a prepared trench, and connect them underwater with incredible precision. 🤯⚓
The sections are then sealed, covered, and protected, creating a safe passage beneath rivers, bays, and even busy shipping channels.
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