The construction of the world's longest underwater tunnel, the Fehmarnbelt Fixed Link, is a remarkable feat of engineering that pushes the boundaries of tunnel construction technology. The tunnel, stretching over 18 kilometers (11 miles) beneath the Fehmarn Belt strait connecting Denmark and Germany, required meticulous planning and execution. The project involved the excavation of a deep trench, the lowering of prefabricated tunnel elements into place, and the subsequent backfilling of the trench. The design and construction process incorporated innovative techniques to ensure structural integrity, withstand the harsh marine environment, and minimize environmental impact, showcasing the ingenuity and expertise of the engineering teams involved in this groundbreaking project.
