Si mmaries
The oad across the storm surge barrier
in tl e Oosterschelde
A ro id will be built across the storm surge
barr sr. Viaducts etc. are already under
construction, as well as the main roads on the
wor! island. In this way full scope is being
give to the future recreational development
of the island.
The oad will be a part of the so-called Dam
rout the 85 km. long public highway which
runs between Rotterdam and Middelburg and
is th shortest connection between the two
towns.
Itwi be a single track road with two lanes
and wo wide escape lanes on the actual
barri ;r so as to take into account the wind
effec In addition to this a 6 meter wide
para el road will be laid across the barrier for
mair enance traffic and cyclists.
The i oad lies at M.S.L. 12 m. and even at
M.S. 20 m. across the Roompot lock, so
that he activities in the lock do not hinder the
road raffic. The road is to be opened to traffic
by 0 tober 1 st 1 987.
Keei mg check on the state of the storm
surg barrier
The esign of the storm surge barrier has
been based upon the best possible estimates,
testii gs and studies. In order to verify these
estin ates a system has now been installed for
keep ng check. Together with rules of
main enance for the barrier, this is to comprise
the integral control of the quality of the
Oost rschelde barrier.
To th s purpose the design process is as it
were etraced, though this time with actually
measured data, which are obtained from
measuring campaigns, during which the
position of all piers is determined and more
detailed measurings carried out on one pier in
the Schaar and one in the Roompot.
The forces endured by the piers from running
water, waves, wind, ice and traffic are followed
up, as well as how the construction reacts to
these loads and conveys them to the
foundation; and finally how the foundation
functions and how the ground under the
barrier behaves. It goes without saying that
the processing of the countless data is carried
out with the help of computers.
The use of rubble
In constructing the storm surge barrier a large
assortment of rubble and slag bricks are used.
Most of this is processed into the sill and the
rubble dams at the headlands.
The sill is constructed as a filter in which each
layer contains the layer beneath itself, under
design contingencies.
High demands were made upon the quality of
the material. Standards still had to be
developed while research was in progress on
suitable stone sorts. Methods were also found
to establish what percentage of the materials
went beyond or fell below these standards.
Stone was brought over by water from
Belgium, Germany, Finland and Sweden.
Splintering occurred during loading, which led
to a decrease in the stability of the assortment.
Processing varies according to the type and
size of stones supplied. The largest stones,
weighing more than a ton apiece, were
brought into position by a special crane, the
'Trias', by means of a spoon-shaped
instrument.
The service building
The service building of the storm surge barrier
in the Oosterschelde comprises all the
accomodations for service and maintenance,
together with a permanent exhibition on the
Delta works.
The building is situated on the seaward side of
the Neeltje Jans dam. From the roof the entire
barrier, the adjoining islands as well as the
water sections can be viewed.
The central high building consists of four
floors. The vertical connections are centrally
situated, and surrounded by glass panels.
Service and visitor traffic on the stairway are
entirely separated.
The energy supply for the barrier and for the
building is split up into one part of daily use
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