First tunnel element prepared for immersion

Preparation of the first element for the Fehmarnbelt tunnel is well under way. The element, which is the first of a total of 89, has just been filled with 4,500 tonnes of ballast concrete. This increases the weight from 73,500 tonnes and enables the element to later sink in a controlled manner down onto the seabed.

The work inside the element has been carried out via a temporary access structure consisting of five shafts, which are bolted onto the watertight steel bulkheads that keep the water out. At one end there is a materials lift, a concrete shaft and a man‑access shaft, which also functions as ventilation. At the other end there is a ventilation shaft and an emergency shaft for personnel.

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Originally published on 22 Apr

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