Civil Engineering Reference
In-Depth Information
Fig. 18.9
Maintenance
Maintenance plan
Reference limiting conditions and maintenance plan
The reference limiting conditions made up the checking document in the
design and construction phase. In this, the functionality and lifespan to
which the work had to comply with on delivery, were described.The crux of
the contract with the contracting combination KMW, is that the river cross-
ing still has to comply with the reference limiting conditions after 10 years.
This means that KMW is continually tackled about the functionality and
life span of all sections. KMW was requested to set up the maintenance plan
as such, that steering would take place on the functionality while the devel-
opment of the life span was being monitored.This means that on inspection,
the functionality would be tested and on that basis, the maintenance activ-
ity would be determined. The determined maintenance frequencies were
thus finalised.
Naturally there is a fixed scheduling for the smaller annually recurring main-
tenance.This includes, amongst other things, the lubricating of installations
and the preservation of steel structures; the basic activities to upkeep the
project.
In light of the 'steering towards life span', it is important that the degenera-
tion process of the different sections is mapped out. That is why, amongst
other things, the previously mentioned arrangement was made with KMW
to place sensors in the lining as part of a monitoring system. With this the
degeneration process of the tunnel is (partially) put into picture.
Availability and maintenance plan
The maintenance policy document - as shown previously - provides for
time frames in which the maintenance must take place. In principle this
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