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CIVIL ENGINEERING
Encompassing
stay cables,
construction methods,
heavy lifting,
tunnel jacking/bridge
sliding and
civil engineering
products such as
Freyssibars,
bearings,
flat jacks
and
expansion joints,
our Civil Engineering team offers innovative solutions for transport and
industry such as bridges, tunnels, reservoirs, dams, silos and energy.
Through the Freyssinet Groups' continuous research & development we can
provide cutting edge design alternatives for projects at concept stage
to benefit the client and the community.
Post-tensioning
Post-tensioned concrete
is widely used in civil engineering structures such as bridges, dams,
reservoirs and offshore structures. The Freyssinet C Range multistrand
system has been designed and developed with such structures in mind.
The C Range System
accommodates both external prestressing, which is gaining wider usage
particularly in bridges, as well as the more traditional internal
prestressing. It was recently approved by the EOTA
(European Organisation for Technical Approval) for use in all European
Countries, according to ETAG, the most stringent guidelines worldwide.
Stay Cables
Over the past 30
years, the rapid development of cable stayed structures, in particular cable
stayed bridges, has indicated a growing
interest in this type of structure.
Modern stay cable
systems using individually protected strands and anchorages derived from prestressing technology,
represent the state of the art in bridge engineering. Isotension,
the Freyssinet worldwide patented stressing method,
is the result of considerable investment into research and development
as well as experience from the involvement in the construction of over
200 cable stay bridges. This method facilitates strand-by-strand
erection and eliminates the need for heavy erection equipment.
Freyssinet
Stay Cable Technology leads the world in this form of bridge
construction and incorporates decades of experience gained from the
design and construction of some of the world's longest span cable stayed
bridges.
The ANZAC Bridge
(formerly named Glebe Island Bridge), across Johnston Bay at Glebe Island
in Sydney Harbour, utilises the abovementioned Freyssinet Stay Cable
Technology. Some of the other cable stayed bridges include;
Macintosh Island Pedestrian Bridge - Gold Coast, Darling
Harbour Pedestrian Bridge – Sydney, Redbank Creek Pedestrian Bridge -
North Richmond, Moore Park Gardens Pedestrian Bridge – Sydney, Sydney
Domestic Terminal Elevated Roadway Bridges – Sydney, Indooroopilly
Pedestrian Bridge – Brisbane.
Construction Methods
The Freyssinet Group
has established an enviable reputation in the development of modern
construction methods including:
·
Insitu or
precast balanced cantilever bridges
·
Incrementally launched bridges and viaducts
·
Span by span segmental erection
These projects
commonly require the design, fabrication and operation of temporary
works items including but not limited to erection gantries for precast
segment erection, formwork travellers for balanced cantilever bridges
and launching girders for span by span construction of bridges and
viaducts.
Such projects are not
undertaken without the availability of considerable technical expertise
and experience. This is accomplished with the design and consultancy
organisations that are encompassed by the Freyssinet Group who in turn
employ some of the acknowledged world leaders in such fields of
engineering.
Heavy Lifting
The use of engineering
technology within the group and of our Strand Jacking
Systems has resulted in the emergence of a heavy lifting division that
is world-renowned. Within the Freyssinet Group, heavy lifting
projects are centralised by the Swiss based
HEBETEC company,
operating jointly with local Freyssinet subsidiaries.
The range of
activities covers incremental launching of bridges, erection of offshore platforms, installation of heavy engineering structures
including boilers and towers and steel hanger roofs weighing up to
25,000 tonnes.
Tunnel
Jacking/Bridge Sliding
A specialised method has been developed for the placing of culverts and
bridges underneath railways with live traffic. These are known as
Autofoncage® (tunnel jacking) and Autoripage® (bridge sliding).
Autofoncage (tunnel jacking)
A tunnel under a railway is obtained by underground jacking of two
culverts built on either side of the railway using tendons and hydraulic
jacks.
Autoripage (bridge sliding)
This method consists of sliding a full bridge from a prefabricated area
located beside the railway, to the final location with a very short
possession time.
For more information on any of our Civil
capabilities or to find your next Civil Solution,
click here
Products
Freyssibars
This prestressing system comprises of a wide range of fully threaded bar
and complimentary anchoring coupling and extension devices. It is used
for post-tension cables, prestressed ground anchors and for applications
involving temporary and permanent tie rods: lifting, suspension,
prestressed splices etc.
Bearings
Mechanical pot bearings - Tetron CD®
- These have been designed and developed to solve structural
movement problems that occur in particular in bridges and tunnels. It
is composed of an elastomer disk confined in a cylindrical space limited
by a hollow base (the pot) and a piston.
Elastomeric bearings - an elastomeric rubber block reinforced
with plates vulcanised when built. This bearing is the connection
between a structure and its support and through elastic deformation can
withstand compression, rotation and horizontal deformation.
Flat Jacks
The flat jack is a thin hydraulic device capable of developing
considerable forces in a simple and economical manner. Uses of flat
jacks include loading of supports and foundation; prestressing using
flat jacks; thrust control and compensation of deformation.
Expansion Joints
CIPEC expansion joints are designed to enable continuous traffic between
two structures, accommodating structural movement due to creep,
shrinkage effects, temperature variations and deformations under live
load. They are suitable for all reinforced concrete, prestressed
concrete, composite and steel structures and particularly for bridge
decks.
For more information on any of our Civil
Products range,
click here
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