Contractors World - International Vol 3 No 8
Czech Republic
A new bridge over the River
Work began on building the new Troja Bridge across
the Vltava in Prague in 2010. The crossing has spans
of 200.4 and 40.4 m. The new bridge is part of the
Prague inner orbital route and links the districts of
Holešovice and Troja.
The innovative nature and low structure tolerances
called for some custom solutions in terms of the
formwork used.
The foundation stone of one of the oldest and
most famous bridges in Europe, the Charles Bridge,
was laid in 1357. The modern-day counterpart to
this prestige project by the late mediaeval emperor
Charles IV. is the high-tech concept of the 262 m long
Troja Bridge.
The crew from contractors Metrostav are pouring
each concreting section in special Doka table forms –
a concept proposed by the engineering team at Česká
Doka in close collaboration with the project managers
for the bridge and of the construction firm.
The custom table forms are made up of WS10 steel
secondaries, H20 top timber-beam primaries, profiled
timber formers and 3-S eco formwork sheeting. The
working platforms under the tables are assembled
from the Load-bearing tower Staxo 40 system.
The table forms were lifted into place from river-
barges with the aid of four hydraulic cylinders. Special
brackets held them in the correct position for pouring,
after which they were lowered back down onto the
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