Civil Engineering Reference
In-Depth Information
management, the monitoring and guiding of the traffic and the monitoring
of the tunnel system from the control room in the service building.
Maintenance policy document
In respect of the maintenance to be carried out to the various sections of the
river crossing, the maintenance policy document provided for a differentia-
tion between the daily surveillance, the visual and technical inspections
and the annually recurring maintenance. The method of maintenance was
specified for the installations in which scheduled preventive maintenance,
condition-dependent maintenance, usage-dependent maintenance and
corrective maintenance were differentiated. Dependent on the importance
(vital, important, or not important) of the various sections of the river cross-
ing, one of these methods could be applied. This was drawn up in a sched-
ule for all activities during the first ten years after the tunnel has been put
into operation.This schedule indicated at what frequency the described fixed
activities (inspection, maintenance, replacement) would be carried out:
- the maintenance to roads and roadsides outside the tunnel is limited to a
maximum of one driving lane during a working day between 09.00 and
16.00 hours.
- in order to carry out maintenance activities in the tunnel, every two
weeks one tube will be closed off from Friday 20.00 hours to Saturday
08.00 hours.
- for technical inspections and major maintenances which are carried out
once every fifteen years, one tunnel tube will be closed for 3 weeks from
Monday to Friday between 20.00 and 07.00 hours.
Fig. 18.7
Maintenance work
Requirements for the design and construction in view of maintenance
Requirements were set for the design and the construction of the tunnel
which concerned the maintenance during the operational phase. In the first
instance the design and the elaboration of the (main)sections had to be
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