French term (edited): maintenus sur un cintre

Probablement : béton armé coulé dans des coffrages et maintenus sur un cintre

CINTRE - n.m.
[Arch.] Partie courbe d'un arc, d'une voûte, etc.
[Mat.l - O.A. - T.S.] Etaiement d'un arc, d'une voûte ou, par extension, d'une dalle ou d'un tablier de pont. - Soutènement d'une galerie. - Elément porteur principal de cet étaiement ou de ce soutènement.
https://www.eyrolles.com/DicoBTP/definition.html?id=2238

Réaliser le coffrage d'un arc en plein cintre
https://mamaisondeaaz.gedimat.fr/article/289/78-realiser-le-...

Si le coffrage en bois est acheté et fabriqué sur mesure, son prix varie de 100 à 120 €/m² pour un coffrage simple ( une banche ), jusqu’à 240 €/m² pour un coffrage cintré ou pour un coffrage plus élaboré ( un poteau ). Prix franco selon le nombre acheté.
https://polyvert.iutrs.unistra.fr/cout-des-coffrages-et-des-...

Les formes de fondations compliquées ou cintrées.
https://www.maxfrank.com/wAssets/docs/products/brochures/pec...

Ground beam foundations and pile caps can be constructed quickly and easily using Pecafil® permanent formwork. Suitable for various applications, including strip foundations and footings, Pecafil® is a versatile, proven and economical alternative to traditional timber or steel shuttering.
https://www.maxfrank.com/uk-en/news/news-list/1707-Fast-and-...

A cet effet, les parois du coffrage sont constituées par des panneaux cintrés (2), placés côte à côte, dont la trace dans tout plan horizontal est un arc de courbe dont la concavité est tournée vers l'extérieur du coffrage.
Pecafil® formwork units are delivered pre-formed, direct to site, to allow for rapid installation. Alternatively, the units can be easily cut and bent onsite and, in a few simple steps, the formwork is laid by hand.
https://patents.google.com/patent/FR2721054A1/fr

The shuttering system consists of a series of curved panels (2) placed edge-to-edge with their concave sides facing outwards, and cross-pieces (4) holding the panels together at the required spacing so that concrete can be poured between them.
https://patents.google.com/patent/FR2721054A1/en

Adjustable panel for shuttering curved walls
The panel is of the type which comprises a laminar shuttering plate (1) which can be curved to determine the surface of the shuttering …
https://patents.google.com/patent/EP2292873A1/en

Title (en) Device for making a curved shuttering
Title (de) Vorrichtung zur Herstellung einer gekrümmten Schalung
Title (fr) Dispositif pour créer un coffrage courbe
https://data.epo.org/gpi/EP1884608A3-Device-for-making-a-cur...

Coffrage Plein Cintre
https://www.menuiserie-charpente-lebon-mci.fr/coffrage-plein...

The RUNDFLEX wall formwork provides pre-assembled standard panels for curved walls. These can be quickly adjusted to suit the required radius and without any modification work on the panel.
https://www.peri.ltd.uk/products/rundflex-circular-wall-form...

CURVED / SLANTED FORM WORK
Therefore , it becomes a case of specific interest to all of us , in case we have different surfaces of RCC elements which might include say :
1. Curved in Plan
2. Curved in Elevation
3. Composite surfaces which are curved both in horizontal/vertical planes.
https://constructionqueries.wordpress.com/2015/08/11/curved-...

Formwork Systems for Curved and Circular Concrete Structures
Certain architectural and infrastructure projects, such as dams, car park ramps and septic tanks, require the construction of curved walls. To enable builders to complete these projects successfully, different types of circular formwork systems are available.
https://meva.net/en-gb/circular-formwork/

A cintre, in construction terms, is a temporary support, typically for stone arches, brick lintels, etc. while the mortar sets, or for supporting things like bridges.

If used for arched structures such as doors and windows, and even for church vaults, etc., it's 'centring' in English.
https://fr.wikipedia.org/wiki/Cintre_(architecture)
https://en.wikipedia.org/wiki/Centring

For larger structures it's 'falsework'.
https://en.wikipedia.org/wiki/Falsework


--------------------------------------------------
Note added at 5 hrs (2024-03-13 22:35:22 GMT)
--------------------------------------------------

As stated elsewhere, 'formwork' is indeed the standard construction term ... for structures containing liquid concrete cast in place until such time as it has set, at which point the formwork is struck (removed). Falsework is what such formwork might be supported by (in the case of a bridge deck, for example).
It would undoubtedly help to know what is being built, where, why, how, etc.

--------------------------------------------------
Note added at 5 hrs (2024-03-13 22:38:08 GMT)
--------------------------------------------------

Tutorial on formwork and falsework: https://www.youtube.com/watch?v=u10zQiHrEfI

--------------------------------------------------
Note added at 5 hrs (2024-03-13 22:46:24 GMT)
--------------------------------------------------

Quicker and easier than the video:


--------------------------------------------------
Note added at 20 hrs (2024-03-14 13:24:48 GMT)
--------------------------------------------------

falsework Temporary bracing for supporting work under construction which cannot yet support itself.
Dict. of Architecture & Construction, ed. Cyril M Harris

falsework Any temporary structure used to support a permanent structure while it is not self-supporting during construction work, modification or demolition.
Glossary of Building and Civil Engineering Terms, British Standards Institution, Blackwell Scientific Publications

falsework Support for concrete formwork or for an arch during construction.
Penguin Dict. of Civ. Eng., John S. Scott

Falsework
This is the subject of BS 5975. It is temporary support work in construction, needed for some part of the structure until it is capable of supporting itself. This might be wet concrete, precast units or steelwork. The basic requirement of the design is to to carry the loads and forces down to a firm foundation ....
Civil Engineer's Reference Book, L.S. Blake, 6.5cm thick, £60 from Blackwell's, Oxford, in 1999.


--------------------------------------------------
Note added at 20 hrs (2024-03-14 13:26:43 GMT)
--------------------------------------------------




--------------------------------------------------
Note added at 20 hrs (2024-03-14 13:40:53 GMT)
--------------------------------------------------