Operational experience with flushing shields
The following problems and disadvantages may be encountered in the use of a flushing shield:

• The flushing shield is assembled in the shaft, i.e. in a confined area with limited space.

• For the duration of the cleaning procedure, one person has to be positioned in front of the flushing shield to remove large obstacles.

• When the flushing shield begins to move too fast, it needs to be slowed down by the operator using a tension rod.