A73 Roertunnel

Roermond en Swalmen, Netherlands
HEIGHT: 7.75m
WIDTH: 25.14m, 27.64m with toes At sump segment 28.64m, 29.69m with toes
TOTAL IMMERSED LENGTH: 587.6m
DEPTH AT BOTTOM OF STRUCTURE: 12.5m below average water level
t119
t119-a73-roermond
Rijkswaterstaat
Besix – Strukton JV
Besix Design Department
2 no. elements@ 158.2m 2 no. elements@ 135.6m
587.6m
12.5m
2008-05-01
4
Dual 2 lane carriageway in each tube with hardstrips and New Jersey Barriers to sides. 1.36m wide central service and escape gallery.
7.75m
25.14m, 27.64m with toes At sump segment 28.64m, 29.69m with toes
Constructed within flood plain. Much of the immersed tunnel is under land rather than beneath
the river Roer.
Elements constructed on line of tunnel in adjacent cut & cover
section.
All works within cofferdam
Geological characteristics: sand, gravel, loam
Design with gravel bed because of seismic impact
Elements moved and placed by winching within cofferdam. Water level raised above
surrounding water level within the cofferdam to float the elements
Gina, omega at immersion
joints
Injectible waterbar at segment
joints
Watertight reinforced concrete achieved by cooling of concrete to control early age cracks
500mm thick gravel bed. Approach ramps of anchored retaining walls and slabs
General backfill
B35
1.06