A train running towards the tunneling machine "Tosca" passes the excavation for
the station Bonner Wall, pushed by two locos, on 3 December 2006. It is loaded
with concrete segments for the lining, a tub of mortar (to fill the gap between
the lining and the earth which is left behind the tailskin) and some pipes.
Another short train is parked in the dead end siding in the background. The
round basis in the foreground is used to turn the formwork carriage for the
so-called C shell (a C-shaped shell of concrete which is fit into the tunnel at
the spots where the lining will be opened laterally to build the stations). The
startup of the new underground line is planned for 2010.
<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>)