Well, another amazing post about an amazing topic from an amazing country, China. China is pushing the limits of modern engineering by building massive undersea tunnels stretching more than 5,000 meters beneath rivers, bays, and coastal waters.
But how do engineers actually construct tunnels this long underwater—and keep them safe under enormous pressure? In this video, we explore how China builds impossible undersea tunnels over 5,000 meters long, from deep excavation and tunnel boring machines to waterproofing, ventilation, emergency systems, and the engineering challenges of working beneath the sea. Read and watch more courtesy of Tactical Authority. Click here
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