Major engineering for Rotterdam tunnel crossing

The Vlaardingen, north side approach to the tunnel (Ballast Nedam)

A major civil engineering project has been hit by a few setbacks and delays, but the Maasdelta Tunnel is well on its way to providing the major port city of Rotterdam with a new crossing.

A ‘letterbox’ structure forms the connection with the tunnels sealed by bulkheads and a steel profile of the same dimensions, called a Gina profile, creates a watertight seal between the tunnel element and access ramp. Omega profiles form the seams between the two tunnel elements themselves.

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