In the construction of underground spaces, such as tunnels, underground stations and parking garages, the geotechnical properties of the soil, the ground water and the workability of the soil are boundary conditions for the design and for the choice of construction methods.
Until recently no
bored tunnels were driven in The Netherlands. In the early nineties this
changed with the construction of the second Heinenoord tunnel under the
river Meuse. GeoConsult made the geotechnical models in the pre-design
stage for this tunnel.
bored tunnels followed: the tunnel under the Westerschelde, the sea entrance
of Antwerp, the Botlek railway tunnel, the tunnel which is part of the High
Speed Rail link Amsterdam-Brussels, and the North-South Metrolink in Amsterdam
which has recently been started. GeoConsult made a variety of contributions:
site investigation design, geotechnical models, research of borefront stability,
application of foam, gradations of bored materials, swelling behaviour of
clays and the characteristics of bored materials in over consolidated clays.