Civil Engineering Reference
In-Depth Information
Fig. 18.6
Reading of sensor
information
There are different possibilities for automating the readings of the sensors.
For the leakage detection cable for example, a permanent monitoring sys-
tem with a warning by means of an LED is possible, but for this, the meas-
uring cabinet must be connected to the supply mains. A similar solution can
also be realised for other means of detection. Aside from that it is possible
to read all the sensors remotely, so that analysis of the data is possible by
means of a computer in the tunnel operating centre. For this, a connection
must be made to the information systems present in the tunnel.
In any case the resistance strain gauge measurements are carried out per-
manently and recorded locally in the transmitter in the tunnel roof near the
sensors. This data can be downloaded onto a laptop computer situated at
road level.
Maintenance system of the Westerschelde
Tunnel
Aside from the design and the construction of the WesterscheldeTunnel and
the approach roads, the contracting combination KMW is also responsible
for the maintenance of the tunnel and the approach roads for the first 10
years after completion. The most important requirement set for this main-
tenance, is that the maintenance must be carried out as such, that the river
crossing still complies with the functional requirements incorporated in the
reference limiting conditions after 10 years.
The starting point for the development of the maintenance system was the
Maintenance Policy Document, which was part of the offer by the contract-
ing combination KMW for the design, construction and maintenance of the
tunnel. The policy document, of which the first written version already
appeared in the early 1990s, stems from 1995. The assumption was that
KMW would take on all the tasks with regard to management, maintenance
and monitoring. Exceptions to this were the policy making in the field of
Search WWH ::
Custom Search