9( neters have proved to be indispensable.
P sently, there are three separate models, one
fc each closure gap. Each model possesses a
g t, the size of one sluice opening, in which all
d ails are registered. The first calibrations
s w sufficient similarity with the physical
rr asurements to justify further use.
C iwth of marine organisms in and on the
s rm-surge barrier
1 ;dies are being made to assess how the
- iwth of marine organisms - particularly
issels - will impede the functioning of the
sterschelde barrier or its components,
owth on the top-layer of the upper foundation
stresses would be unfavourable, but it is
probable that this will occur as the sand on
:m moves continuously. The sill of the
rm-surge barrier, however, offers an
ractive environment for mussels as there are
al spots to which they can attach themselves
d also because there is sufficient current.
0 mussels will concentrate particularly on
outer layers of the sill. Although it could be
ssible that an unbalanced mussel-growth
luld adversely affect the stability of the sill,
ts already taken in a biological model, have
own that the sill will remain stable under all
icipated patterns of growth.
e southern dam-section of the Oester Dam
sign, implementation and evaluation
e southern dam-section of the Oester Dam
is from the Isle of South-Beveland three
imeters northwards along the Scheldt-Rhine
c inection. As a result of the transverse
c nections built between the new dam-body
a the western harbour-dam of the Kreekrak
ces, the slope-protection could be made in
a npler manner; moreover, copper slag-blocks
v. e reclaimed from a former high-water dam
a: re-used.
In ome places, the bottom under the dam-body
p ved to have less consistency than anticipated
a consequently, required not only extra
S: d but also additional work. On the higher
s Ions of the slope, the concrete blocks were
P ed directly on to the clay, as the contractor
h proposed in his cost-saving plan. In
9;- ral this work-method proved satisfactory
e' l though sometimes the lower quality clay
w washed out.
Bridges over the Bath Discharge Canal
The Bath Discharge Canal, which will serve as
a discharge canal for the future Zoommeer,
crosses a great number of mains and roads
and also the railway to Vlissingen. It has been
decided to build all these crossings as bridges.
In some cases, the length of the crossings
could be reduced by narrowing the Canal
locally. For aesthetic reasons, all adjacent
bridges will, as far as possible, look alike. For
traffic-technical reasons, the cross-sections of
the roads will be aligned with similar crossings
over the Scheldt/Rhine connection. The article
also deals with the actual construction of the
bridges and the planned execution methods.
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