Civil Engineering Reference
In-Depth Information
of the delay up to a maximum of 13.6 million euro
100 days delay) was no
longer an incentive for the contractor to finish the project quickly.
In order to find a solution to this, the client and the contractor agreed to a so-
called package deal on 6th December 2000 which meant that the contractual
completion date was moved forward to 14th November 2003. For each day
delayed there was a penalty of 136,000 euro, whereas a day gained with
respect to the completion date would provide a payment of 68,000 euro for
the contractor.
Prior to the agreement, the planning and logistics were gone into and mapped
out very carefully in an extensive joint study (by the client and the contractor),
in which the logistical process was simulated, for example, by means of com-
puter models. The aim of the study was to give more insight into the very
complex process and to investigate whether, and where the possibilities were
for optimization. The study created a framework necessary to discover the
possibilities for improvement, to seize them and then to elaborate on them.
The bonus for gaining time which the contractor was offered functioned as an
important incentive for the contractor to also actually invest in a number of
measures to speed up and improve the process.
These measures did not result in fundamental changes in the layout of the
infrastructure. However, major changes were carried out in the field of man-
agement, organisation, capacity and maintenance of the logistical system
which were also prompted by the occurrence of unsafe situations. In add-
ition, a large number of fitting out activities were moved forward in time
which was worked out in greater detail in a fitting out scenario.
New fitting out scenario
In May 2001, the building consortium presented a new fitting out scenario,
in which KMW, subcontractors and NV Westerscheldetunnel had jointly
elaborated the fitting out activities in the tunnel both technically and system-
atically.The results of this were being processed in a 'progress' diagramme,
which made clear where and when a fitting-out activity had to be carried out.
Fig. 14.11
'Progress' diagramme
7000
Progress diagramme
In order to guarantee
the tight time schedule,
KMW uses progress
diagrammes.These
accurately show which
activity must take
place when and where.
6000
5000
4000
COMPLETION
14/03/2003
3000
2000
1000
0
Date
Boring process
Cross connections
Dismantling of boring
facilities and track
Cellars
Step barrier inside
Heat-resistant cladding
inside 35%
Heat-resistant cladding
outside 35%
Heat-resistant cladding
complete
Installations cable gallery
Installations traffic tube
Roadworks
SAT and SIT tests
Step barrier outside
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