The Underwater Tunnel Hidden Beneath the World’s Longest Sea Bridge
Автор: MegaProjectsHub
Загружено: 2026-02-07
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The Hong Kong–Zhuhai–Macau Bridge is the longest sea crossing ever built — but its most incredible engineering achievement is completely hidden underwater.
Beneath 55 kilometers of viaducts lies a 6.7-kilometer immersed tube tunnel, sunk 40 meters below the sea to allow massive container ships to pass through one of the busiest shipping lanes on Earth. Each tunnel segment weighs up to 80,000 tons and had to be lowered with centimeter-level precision in strong tidal currents.
In this video, we break down the unseen engineering behind the Hong Kong–Zhuhai–Macau Bridge: the artificial islands built without dredging, the world-record underwater tunnel installation, typhoon-resistant design, and the controversies surrounding safety, cost, and environmental damage.
This is not just a bridge — it’s one of the most complex marine engineering projects ever attempted.
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#megaengineering #underwatertunnel #seabridge #engineeringmarvel #infrastructure #megaprojects #HZMB
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