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Contractors World - International Vol 3 No 8
Australia
Tower crane employed in the
renovation of the museum in
Sydney
A 280 EC-H 12 Litronic tower crane was
employed to handle all the material for the
renovation and reconstruction work on the
Museum of Contemporary Art Australia (MCA)
in the Sydney harbour, by the Australian
company Watpac. The exhibition centre was
ceremoniously reopened in the spring after
completion of the extensive renovation work.
The Liebherr dealer for North America,
Morrow Equipment Co., L.L.C., supplied Watpac
with the top-slewing crane for this construction project. The company with its fleet of eight tower cranes is
one of the largest customers of Liebherr in Australia.
The 280 EC-H 12 Litronic, the latest acquisition, was used in the works on the museum in the standard version with
a lifting capacity of 12 tonnes and a working radius of 75 metres. Strict safety requirements had to be complied with,
because the quayside street as well as the street behind it were within the operating area and the crane had to slew
above them.
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Panorama
Poland
TBM for road tunnel in Gdansk
Herrenknecht recently delivered a tunnel boring machine with a
diameter of 12.56 meters for the construction of a road tunnel under
the Vistula in Gdansk. On Thursday, September 13, in the presence of
the Gdansk City President, the customer OHL and the project owner
GIK (Gdańskie Inwestycje Komunalne). accepted the machine.
A new ten kilometre long “Słowacki route” under the river Vistual
will to improve the transport infrastructure in the greater Gdansk area
as well as the more than one million people living in the metropolitan
area. It links the “Lech Wałęsa Airport” with the highway to Warsaw
and with the Gdansk deepwater seaport, one of the most important
transhipment centres in Eastern Europe.
The ‘Słowacki Route’ will pass under the Vistula via a twin tube
tunnel with a total length of 1.4 kilometres. The tunnel tubes will
each accommodate two road lanes and will be connected by seven cross passages for escape routes.
For the construction of this major tunnel the building contractor OHL ordered a Mixshield with a diameter of 12.56
meters from Herrenknecht.
According to Herrenknecht project manager Peter Griesbach, a challenging advance awaits the machine and the
jobsite crews. “At certain points there will only be about eight meters above the machine to the bottom of the river.”
The machine will be sealed against penetrating groundwater or subsoil at pressures of up to four bar: between shield
skin and lining segment with a triple wire brush seal and a quadruple sealing system on the drive. The equipment was
designed in such a way that tunnelling can also be carried out on the steep four percent downward and upward gradients
at the beginning and in the second half of the tunnel respectively.
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