Freyssinet International (stup)

Jean-Claude Percheron

J&eacute;r&ocirc;me Stubler

Patrick Ladret

Manuel Peltier

Benoit Lecinq

Jean-Pierre Messein

Craig Robertson

Andre Stouffs

A stay comprises an inclined casing and a bundle of substantially parallel taut reinforcements lodged in the casing and individually anchored in a first and a second anchoring region. According to the invention, the casing and some of the reinforcements are installed by applying substantially uniform tension values to the reinforcements, then several iterations of the following steps are formed: compacting the installed reinforcements, at least at one end of the casing; slipping a further group of reinforcements along inside the casing, in a space left available by the compacted reinforcements; and tensioning each reinforcement of the further group between the first and second anchoring regions so that all the installed reinforcements exhibit substantially uniform tension values.

Method for erecting a stay

The invention concerns a single-piece part for producing a cable anchoring jaw. The single-piece part includes several angular portions arranged about a generally cylindrical duct, assembled by clamps adjacent to the duct. Each clamp is located at the bottom of one particular radial slot extending between two portions from the part periphery. Each clamp has towards its own particular slot a surface whereof a part at least is inclined relative to the direction perpendicular to the slot radial plane, such that the clamp radial thickness has a minimum in a specific position along the direction, thereby ensuring the position where the clamp will be broken to obtain the jaw wedges from the part portions, which enables to better control for clamping the cable strand in the jaw.

Single-piece part for making a cable anchoring jaw and method for making such a jaw

The strand comprises a group of twisted metal wires, a plastic sheath and a pliant filling compound which fills internal interstices between the twisted wires of the group and a peripheral interstice lying between the periphery of the group and the inner face of the sheath. This peripheral interstice has, in a cross section of the strand, an area of between P&times;e and 0.6&times;S2, where P is the external perimeter of the group of wires, e &equals;0.05 mm and S2 is the cumulative area of the gaps lying between the periphery of the group and the smallest circle within which the group is inscribed.

Individually protected strand, and its manufacturing process

A reinforcement for a building works structure comprising an assembly of solid wires. The wires are mutually parallel to form a bundle and the reinforcement comprises a sheath made of plastic material enclosing the bundle and providing it with cohesion.

Cable with parallel wires for building work structure, anchoring for said cable and anchoring method

An anchoring device for fixing a structural cable to a building element, the cable comprising a plurality of strands each comprising wires which are themselves enclosed together in a protective sheath, each of the protective sheaths being interrupted at a terminal edge such that the strands have each an exposed end section. The exposed section is inserted in a sealed chamber with a packing box whereof on plate is fixed and the other plate is compressed by threaded rods.

Anchoring device for fixing a structural cable to a building element

Cable with parallel wires for building work structure, anchoring for said cable, and anchoring method

For placing a multiple strand cable under tension by successive tightening of the different strands by means of an individual jack, procedure is as follows: the first strand of the cable is tightened, called below 'control strand' while keeping possible then measurement of the tension of this strand at any moment, then pulling a second strand until its tension is equal to that of the control strand, measured at the same moment, and then anchoring this second strand so stretched, a third strand is then tightened until its tension is equal to that of the control strand measured at the corresponding moment and then this third strand so tightened is anchored, and so on until the anchoring of the last strand, after which the tension then applied to the control strand is noted and, after having relaxed the latter and having freed from it the measuring means, this control strand is anchored while applying to it the tension thus noted.

Growing community of inventors

Vienne Arthies, France

Jean-Claude Percheron