Civil Engineering Reference
In-Depth Information
Agitators and roller-crusher
Furthermore, the design also paid a lot of attention in taking measures to
keep the danger of the suction opening getting blocked as low as possible.
To this end, the design provided for a number of machines set up in front of
this opening which had to keep the lumps of clay in motion and make them
smaller. First of all, two horizontally revolving agitators mixed the lumps
of clay with bentonite and also prevented large quantities of clay and other
particles from forming a deposit in the pressure chamber. The bentonite
slurry then came between two vertically rotating toothed cylinders, the
Fig. 10.5a
Frontal view of TBM;
the agitators and
crushers are situated
behind the opening for
the slurry disposal
Cutting wheel
with linked spokes
Active centre cutter
Spoke with
cutters
Slurry removal
opening
Removable
cutters
Bore front
support plates
Fig. 10.5b
Frontal view of TBM;
the agitators and
crushers are situated
behind the opening for
the slurry disposal
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