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A tunnel is an underground or undersea passageway. It is dug through surrounding soil, earth or rock, or laid under water, and is enclosed except for the portals, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
Tunnel Rush is a fast-paced 3D game where you dodge barriers and race through caves and tunnels. Play online for free on Poki and challenge yourself or a friend in the two-player mode.
Learn about the history, methods, uses, and facts of tunnels and underground excavations. Explore how tunnels have been built for mining, transportation, water, and other purposes since ancient times.
Learn the meaning of tunnel as a noun and a verb, with examples of usage and related words. Find out how to pronounce tunnel and how to translate it in different languages.
Learn about the history, types and factors of tunneling in construction. Find out the pros and cons of tunneling compared to open cuts, and the approaches and alignment of tunnels.
Learn about the types, characteristics and challenges of tunnels, from mining to transportation. Explore the history, examples and future of tunnel engineering and construction.
Learn about different techniques and applications of tunneling in geotechnical engineering. Explore topics such as cut-and-cover, jacked box, bored method, subsea tunneling and more.
