US EditionThe Rubber Used to Keep Undersea Tunnels Sealed Is Decaying from the Inside Out Faster Than Engineers Thought
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On March 28, 2026, a study published in the newspaper Tunnelling and Underground Space Technology raises serious questions about the durability of rubber used for underwater tunnel seals. Directed by engineers at Shijiazhuang Tiedao University (STDU) in China, this research highlights potential defects in these joints, and challenges ideas received from engineering professionals. Sustainability concerns for sealing joints Undersea tunnels, such …
The Rubber Used to Keep Undersea Tunnels Sealed Is Decaying from the Inside Out Faster Than Engineers Thought
Deep beneath the waterline, a strip of rubber is all that stands between the ocean and the inside of an undersea tunnel. Engineers designed that seal to last 100 years. New research shows it weakens much faster under real conditions than earlier tests suggested. A study from Shijiazhuang Tiedao University in China tested rubber taken from the Yuliangzhou tunnel. Researchers wanted to see what actually happens to the main watertight seal—called a…
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