MASSIVE RESCUE OPERATION AFTER TUNNEL COLLAPSES: More than two dozen workers were inside an industrial tunnel that collapsed at a Los Angeles work site. ABC's Alison Kosik reports. | World News Now

1.4M views · 10K reactions | 31 construction workers inside a huge industrial tunnel in Los Angeles have been rescued after a portion of it collapsed. Read more: https://www.newsweek.com/los-angeles-tunnel-collapse-what-we-know-least-15-trapped-2097023 | Newsweek | Facebook

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🚀Let’s go! ✅ These two images illustrate crucial stages in tunnel construction and design, from both structural and detailed engineering perspectives. The first provides a cut section view showing how waterproofing, primary lining, and secondary lining are layered to resist both soil and water pressures. Proper sealing, joint design and drainage beneath the invert are taken into account to protect long-term durability and maintain serviceability. The second image is a technical drawing that com