Civil Engineering Reference
In-Depth Information
Fig. 14.13
The application of the
reinforcement mesh of
the heat-resistant
cladding
applied the mortar very evenly in strips on the wall. If this work was done man-
ually, the angle would all too quickly vary and as a result of this, also the thick-
ness of the layer. One robot was able to treat about 50 m
2
of tunnel wall an hour.
Precision work
The use of the robots was unique: elsewhere in the world robots had been
used for applying spray mortar, but the thickness of the cladding was usually
about 150 to 200 mm, much thicker than the 45 mm required in the
Westerschelde Tunnel, which required a very large degree of accuracy.
The tolerance on the thickness of the cladding was
5 mm. In order
to check whether the correct thickness had been achieved, fluorescent pegs
2 and
Fig. 14.14
The spraying robot in
action
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