Present in a tail shield (1) for a shield tunneling apparatus are
a number of grouting lines (3) that are open to a tail shield end (4)
and that can be supplied with filling material for grouting a ring gap (7)
with the filling material, such as mortar, for example. In addition, additive material
lines (8) that can be supplied with additive material are present, which
empty into the grouting lines (3) in an end segment (12) of said
grouting lines (3). As a result, an additive material, such as a solidification
accelerator, for example, can be added immediately before the mixture is discharged
into the ring gap (7), so that the risk of a blockage in the grouting lines
(3), which are not accessible in the region of the tail shield end (4),
is relatively low.
