How Do They Build Tunnels Under Cities Without Destroying Everything? 😱

Описание: Ever wondered how massive tunnels are built deep underground without blowing up entire cities? 🤯

Meet the gigantic tunnel boring machine (TBM), a steel monster capable of cutting through rock, soil, and even mountains while simultaneously building a tunnel behind it. But here's the shocking part: after completing the project, some of these multi-million-dollar machines are permanently left buried underground!
Watch till the end to discover why engineers do this and how one small mistake can cause an entire tunnel to collapse.

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