New measurement and control technology in tunnelling - Tunnel Engineering: Basics and Additional Services for Design and Construction - page 274

The individual components of the SLS-RV (Fig. 6-31) are as follows:
- One active target as receiver for a laser beam and a simple prism to measure the dis-
tance in the pipe jacking machine.
- One servo-motorised laser theodolite on an automated tripod in the pipe run.
- Three surveying prisms (one connection target and two reference prisms for automatic
surveying) in the pipe run.
- One uniaxial inclinometer in order to record the rolling of the tunnelling machine.
- One switching cabinet.
- One control computer at the control position of the machine.
- One measuring wheel to measure the distance jacked.
Fig. 6-32 shows the arrangement of the system components in the pipe run. This layout makes
it possible to navigate even round horizontal and vertical curves. After a starting phase, the
components are installed in the front part of the tunnel and move with the jacking of the pipes
without any line of sight from the starting shaft. All hardware components are controlled by
the control computer, the measured data is queried and saved in a database and the relevant
information about the progress of the tunnel is displayed by the control computer.
Figure 6-32 Arrange-
ment of the components
of the SLS-RV system
(VMT GmbH).
Fig. 6-33 shows an example of the graphical and numerical display of the machine posi-
tion and attitude at the control position. The machine driver can use this to steer the tun-
nelling machine.