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Strengthening old buildings


Stone structures

Freyssinet uses Foreva® Stone solutions to stabilise foundations, strengthen masonry and consolidate structures, and minimises operations that might detract from the authenticity of the historic elements. Stone buildings can change shape, fracture and develop cracks as a result of soil settlement, shell buckling, arch thrust forces or a simple loss of cohesion in the masonry.

Freyssinet supports its customers and designs made-to-measure solutions
in conjunction with the architect in charge of the renovation:

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Precautionary measures,
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Assistance with diagnosis,
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Assistance with the engineering analysis of the structures of the historic building,
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Assistance with defining the consolidation strategy,
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Performance of reinforcement work.

Foreva® Stone solutions can repair and reinforce stone structures regardless of how damaged they are:

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Loss of cohesion and settlement,
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Buckling,
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Insufficient strength,
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Excessive deformation,
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Lateral thrust.

Foreva® Stone solutions were developed with the aim of strengthening masonry using:

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Passive internal reinforcements,
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Passive external reinforcements,
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Active prestressed reinforcements.

In addition, Freyssinet carries out pointing and foundation consolidation.  

   

Grand Commun, Versailles (France)


Wooden structures

Freyssinet uses its Foreva® Wood solutions to restore damaged elements and strengthen and protect structures, while protecting the integrity of the architectural concept and minimising operations that might detract from the authenticity of the old elements. Wooden structures can age, be attacked by fungi and insects or be subjected to excessive loads due to a change of use. Defects such as rotting or damaged wood, excessive deformation, cracking or failure of elements can occur as a result.


Freyssinet supports its customers right from the strengthening project preparation phase and designs made-to-measure
solutions in conjunction with the architect in charge of the renovation:

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Protective measures,
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Assistance with diagnosis,
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Assistance with structural analysis and design,
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Assistance with defining the strengthening strategy,
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Performance of reinforcement work.

Foreva® solutions can repair and reinforce solid wooden structures regardless of how damaged they are:

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Damaged, rotten wood,
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Cracked or broken sections,
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Insufficient strength of an element,
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Insufficient stiffness and excessive bending of an element,
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Excessive lateral arch thrust.

Foreva® solutions are used to repair, reinforce and stiffen timber frameworks:

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By re-profiling the defective material or replacing it with a new section of timber,
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By adding passive reinforcements made up of internal tie-rods working in tension or external wooden elements working in compression or bending,
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By adding active reinforcements in the form of single-strand prestressing tendons.
     
Curved vaulted timber frame weakened tie beams



Areas of application:

Bridges and engineering structures, dams
Public buildings
Private buildings
Ancient monuments