Civil Engineering Reference
In-Depth Information
Terneuzen, the deposits above the Boom clay are practically missing. This
fairway is maintained across a width of 750 metres at a depth of 20.5 metres
below NAP.
Zeeuwsch-Vlaanderen
Middelplaat
Zuid-Beveland
0
10
Pas van
Terneuzen
Recent sea sand
Everingen
20
Sand containing clay
30
40
50
60
Glauconitic sand
Bored tunnel
Boom clay
6,600 m
Berg sands
The Westerschelde
Tunnel crosses
through different soil
deposits
Fig. 1.4
Boring machines
The tunnel was bored across its full length of 6,600 metres. For this, two bor-
ing machines were designed and manufactured by the company Herrenknecht
in Germany. For the circumstances in the Netherlands, basically two boring
methods are eligible: the slurry shield method and the earth pressure balance
shield method, mostly referred to as EPB. The slurry shield has a broad spec-
trum of applications and can be applied not only in cohesionless, permeable
sandy soils, in principle it can also be applied in cohesive, poorly permeable
Fig. 1.5
One of the two tunnel
boring machines in
the factory at
Herrenknecht
Search WWH ::
Custom Search