The tail modules of the tunneling machine "Tosca", which will drill the eastern
tube of the new underground line, seen from the front end on 22 April 2006. On
this day, the parts of the shield were lifted into the starting pit at the
station Bonner Wall. The parts of the shield had to be assembled in front of the
western tube, as the opening in the cover of the pit does not span the eastern
half. In the lower left corner a part of the front shield (Schneidenschuß)
is visible, later the center shield (Mittelschuß) was placed behind it.
After completion the whole shield had to be shifted to the eastern tube. The
tail modules on the right belong to "Rosa", the other tunneling machine which
will drill the western tube. The parts of its shield were lifted into the pit
after "Tosca" was completed.
<p>
Digital photo by
<a href="http://www-users.rwth-aachen.de/christoph.schmitz2/index.html">Christoph
Schmitz</a>
(<a href="mailto:christoph.schmitz2@post.rwth-aachen.de">christoph.schmitz2@post.rwth-aachen.de</a>)