Immersed tunnels

Immersed tunnels

Track record

1995 Wijkertunnel, Geodetic network.
1998 The water pumping station Leemans close to Den Oever. The tunnel is constructed from 36 elements of 30 meters long and immersed on two support beams per element.
2008 Bjorvika tunnel Oslo . Installation of the gravel bed for the first immersed tunnel in Norway.
2010 Tyne tunnel Newcastle (UK)  immersion survey consultancy.
2011 Noord-Zuid line, As-built, dimensional checks first element, Geodetic network checls under Amsterdam Central Station.
2012 Noord-Zuid line, As-built checks on the final position after immersion of the 4 tunnel elements.
2011-2013 Coatzacoalcos tunnel Mexico. As-built, dimensional checks, as-built charting of the tunnel element underside for gravel bed counter molding, survey guidance of gravel bed installation and responsible for the positioning survey of the float up and the immersion of five elements for the first immersed tunnel of Latin America.
2014  Positioning survey during the installation and immersion of two bridge caissions for the Izmit bay bridge project.
2014 Positioning survey during the installation and immersion of  Aqueduct for the  Harinxmakanaal

 

Immersed tunnel