Our portfolio of methods
1/ In situ construction
- Incremental launching
- Cast-in-place cantilever
- Construction on scaffolding
2/ Precast segmental erection
- Balanced cantilever erection with launching gantry / lifting frames / cranes
- Span by span erection with launching gantry / on falsework
- Precast girder erection
- Full span precast method
3/ Heavy lifting and handling of structures
- Heavy lifting: strand lifting, precision jacking
- Sliding techniques: autoripage, autofonçage, airpad sliding, lateral sliding
- Rotation systems
- Special formwork
- 1946First development and use by Freyssinet of industrialized methods for bridge erection, for the Luzancy bridge
- 320+Number of cable-stayed bridges where Freyssinet has been involved
- 70+Number of bridges built in situ by Freyssinet
- 50+Number of precast bridge decks erected by Freyssinet
Why choose Freyssinet
Hundreds of bridge and deck construction projects around the world for over 70 years, small to large-scale.
Applicable to:
- In situ construction
- Precast segmental erection
- Lifting and handling of structures
Including:
- Choice of construction method
- Optimization of superstructure design and construction method
- Design & supply of equipment and temporary structures
- Erection of the superstructure, equipment operation, concrete casting, prestressing
- Finishing work, including installation of structural fittings
- Maintenance and repair services
Proven ability to propose and implement alternative designs and methods to achieve the best possible value at the lowest life cycle cost.
Under the leadership of our Major Project Department for the largest and most complex projects, our specialist supervising teams are able to manage safely the construction project within budget and on time, taking into account all technical and environmental factors.
A global approach to bridge construction
Selection of construction method
- Structural design of substructure and superstructure
- Material quantities and specifications
- Review of options for the construction methodology
- Assessment of temporary works and special equipment requirements
- Phasing of works
- Cost estimates for budgeting
- First approaches to project, quality and safety management
Optimization of construction method & equipment
- Construction engineering
- Assistance to designers in reviewing all details that will facilitate construction
- Development of temporary works and special equipment
- Detailed methods of construction
- Integrated shop drawings for the fabrication of the superstructure
- Integration of post-tensioning with all associated drawings and details
- Design of temporary works associated with precast yards and molds
Execution
As a main contractor, subcontractor or through innovative partnership agreements, our teams are able to execute construction project efficiently, in compliance with specifications, costs, deadlines and quality:
- Mobilisation of an experienced project team
- Supply and operation of the temporary works for the precast yard and the superstructure construction
- Project and risk management and effective coordination with the various stakeholders
Monitoring and maintenance
Our teams can assist in monitoring the structure, advise on maintenance activities and help anticipate repair interventions and costs:
- Define the most suitable monitoring scheme, assess its cost
- Supply monitoring hardware and software
- Provide training and handover
- Inspect the structure and issue recommendations
- Propose and implement repair or strengthening plans if required
Our references
Ihsaniye viaduct incremental launching
TMCLK Link in Hong-Kong: balanced cantilever erection
Çayırköy viaduct incremental launching
Adelaïde Superway erected with a launching gantry
Yuen Long Station LTR footbridge erection
Immingham bridge: underpass autofonçage
Lian Tang interchange highway erection
Bridge and deck construction methods and solutions
In situ deck construction
Incremental launching
Segments of comparable length are concreted in a formwork or assembled in an assembly area. Then, each segment is match-cast against the previous one and prestressed to the section of the deck already built. As segments are added and slided over special bearings, the increasing length of bridge deck is repeatedly pushed / pulled out of the formwork or assembly area, over the abutment onto the piers, to reach its final position. Provision of a launching nose stressed against the first deck segment will reduce the big bending moments in the deck during launching.
- Erection rate
one segment every 7 or 8 days - Quality of segment fabrication
with a sheltered casting yard - Limited investment in special equipment
(launching nose, jacking system,
launch bearings, side guides)
Incremental launching
Segments of comparable length are concreted in a formwork or assembled in an assembly area. Then, each segment is match-cast against the previous one and prestressed to the section of the deck already built. As segments are added and slided over special bearings, the increasing length of bridge deck is repeatedly pushed / pulled out of the formwork or assembly area, over the abutment onto the piers, to reach its final position. Provision of a launching nose stressed against the first deck segment will reduce the big bending moments in the deck during launching.
- Erection rate
one segment every 7 or 8 days - Quality of segment fabrication
with a sheltered casting yard - Limited investment in special equipment
(launching nose, jacking system,
launch bearings, side guides)
Incremental launching sketch
Cast-in-place cantilever with form travellers
This method is ideally suited: to cross high gaps and avoid ground constraints for bridges whose length does not require prefabrication, or with different cross sections or casting lengths
- High erection rate
one pair of segments every 3 to 7 days - Long-span bridges
with access constraints - Limited investment
Cast-in-place cantilever with form travellers
This method is ideally suited: to cross high gaps and avoid ground constraints for bridges whose length does not require prefabrication, or with different cross sections or casting lengths
- High erection rate
one pair of segments every 3 to 7 days - Long-span bridges
with access constraints - Limited investment
Our references in deck construction
Ihsaniye viaduct incremental launching
Çayırköy viaduct incremental launching
Precast segmental deck erection
Balanced cantilever erection
with launching gantry
- High erection rate
1 or 2 pairs of segments per shift - Minimal disruption to existing
roads, traffic and services - Clear access to several work fronts
Balanced cantilever erection
with lifting frame
- High erection rate
up to 2 pairs of segments per shift - Craneless method applicable
both to precast segmental decks
and cable-stayed decks - System adapted to large segments
Balanced cantilever erection
with launching gantry
- High erection rate
1 or 2 pairs of segments per shift - Minimal disruption to existing
roads, traffic and services - Clear access to several work fronts
Balanced cantilever erection
with lifting frame
- High erection rate
up to 2 pairs of segments per shift - Craneless method applicable
both to precast segmental decks
and cable-stayed decks - System adapted to large segments
Span by span erection with launching gantry
The technique is applicable to prestressed concrete bridges, continuous spans, multiple spans not exceeding 50m, and spans with steeply curved alignment, regardless of the longitudinal and plane profiles of the structure.
- Most economic and fastest method
for multi-span viaducts
High erection rates
2 to 4 spans per shift - Strict geometry controls
of segments on precast area - Smaller crew size required
compared to balanced cantilever construction
Precast girder erection
- Fast erection rate, 1 span per shift
- Simple method
which can be done by a small team - Minimised geometry control
Span by span erection with launching gantry
The technique is applicable to prestressed concrete bridges, continuous spans, multiple spans not exceeding 50m, and spans with steeply curved alignment, regardless of the longitudinal and plane profiles of the structure.
- Most economic and fastest method
for multi-span viaducts
High erection rates
2 to 4 spans per shift - Strict geometry controls
of segments on precast area - Smaller crew size required
compared to balanced cantilever construction
Precast girder erection
- Fast erection rate, 1 span per shift
- Simple method
which can be done by a small team - Minimised geometry control
Our references in deck construction
TMCLK Link in Hong-Kong: balanced cantilever erection
Adelaïde Superway erected with a launching gantry
Lian Tang interchange highway erection
Contact us
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