Hydraulic Power for all Industrial Applications

▼ Millau Viaduct, France – The world’s highest bridge
The world’s highest bridge is launched and
succesfully closed with Enerpac PLC-controlled
bridge launching and lifting systems. Since the
first hydraulic launch of the bridge’s deck in
February 2003, another 16 launches were
needed to move the 36.000 ton deck over a
distance of 2460 meters.
Pushing the deck out into space
The integrated hydraulic systems are designed
and constructed in Spain by the Enerpac
Construction Centre. It is matter of pushing on
to seven concrete piers this deck 27,35 metres
wide. During the launching it was supported by
seven temporary piers, with telescopic
systems designed by Enerpac. Each system
comprises a cylinder to lift the deck and
several skates with cylinders for launching it.
The thrust capacity will be 5280 ton and 2400
ton depending on the side. Valves will ensure
the independence of the units.
The nose of the deck
Through its weight, the deck bends and its
level is then less than that of the next pier. On
the deck an hydraulic nose recovery system
makes it possible to compensate this
difference.
Controlled Hydraulic Movement
All hydraulic systems for pushing the deck are
operated from the PLC-Control Centre on the
bridgehead. Hydraulic system integration, of
high force hydraulics and advanced control
technology, nowadays play and important role
in the controlled movement of large-scale civil
engineering projects, like the launching of the
Millau Viaduct.
▼ Underpinning a fly-over
This fly-over needed partially to make way for
an underground transit line. An Enerpac 12
point synchronized lifting system controlled
the 12 CLL-5004 single-acting jacks in their
displacement while positioning the section.
The lock nut feature on the CLL Series jacks
secures for long term underpinning.
Products:
• CLL-Series, lock nut jacks
• SLS-Series, Synchronous lifting system
• ZE-Series, electric pumps
www.enerpac.com
Enerpac in action
Integrated Hydraulic
Systems:
• Lock nut jacks
• Double-acting jacks
• Hollow plunger jacks
• Synchronous lifting
systems
• Electric split-flow pumps
• PLC-Control units
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