Freyssinet International (stup)

Freyssinet

Benoit Lecinq

Jean-Pierre Messein

Jerome Stubler

Ivica Zivanovic

Christian Tourneur

Jean-Claude Percheron

Sebastien Petit

Craig Robertson

Sven Eilif Svensson

Fernando Guedes De Melo

Baruch Gedalia

Francois Rapinat

Francois Bignon

Roger Raymond

A method of reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe through in situ stratification of at least one band of reinforcement fibers and a resin or a resin including matrix comprising the steps of Related device for reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe.

Method and machine for reinforcing an embedded cylindrical pipe

A method for assembly of a stay includes a series of steps that include connecting in the vicinity of an anchoring zone, a new group of N reinforcements to a shuttle located within the sheath of a stay to be installed. The shuttle is driven towards another anchoring zone by means of driving and guiding means. When the shuttle has arrived substantially in the vicinity of the anchoring zone, and as long as entangling is detected between the driving and guiding means in a portion contained substantially between the shuttle and the first anchoring zone, the shuttle is rotated about its main axis in the opposite direction to the said entangling. The group of N reinforcements is then separated from the shuttle. Each reinforcement of the group is tensioned between the anchoring zones. The preceding steps are repeated until the installation of the reinforcements is completed.

Method for the assembly of a stay

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

Device for damping the vibrations of a sheet of stays of a work of construction, the sheet of stays comprising at least one first stay () and one second stay (). The device comprises at least one damper () with substantially linear stroke, which has a first connection () articulated on the first stay () and a second connection () articulated on the second stay (), and the axis of the damper () is substantially perpendicular to first and second stays ().

Device for damping vibrations of a guy-cable array for an engineering construction and corresponding damping method

The invention proposes a device for damping the vibrations of a cable used in the structure of a construction work, the cable comprising a bundle of metal strands having ends anchored to the work and being surrounded, in at least one region adjacent to an anchored end of the bundle, by a tube connected to the work, the device comprising a collar placed around the bundle of strands and means of absorbing the vibration energy mounted substantially between the collar and the tube, wherein the absorption means comprise at least two piston-type dampers with substantially linear stroke, placed substantially radially relative to the cable and distributed at angles around the cable, each piston-type damper having a first link articulated with the collar and a second link articulated with a support secured to the tube.

Device for damping the vibrations of a cable and related damping method

The cable, in particular of the stay cable type, comprises a set of traction reinforcements, two devices for anchoring the reinforcements in two respective zones of the construction, the reinforcements being spaced apart from one another at the anchoring devices, means for deviating the reinforcements in order to cause the reinforcements to converge toward a running part of the cable into a substantially parallel bundle which is more compact than at the anchoring devices, and a guide member which is in closely set contact around the set of reinforcements. This member has an inner surface, the cross section of which is adapted to the peripheral shape of the parallel bundle and the longitudinal section of which has a convex curvature which, over the length of the guide member, allows angular deflections of the reinforcements which are substantially greater than the maximum angle of convergence of the reinforcements between the anchoring device and the running part of the cable.

Construction cable

In order to install a reinforcement around a cylindrical underground pipeline, an excavation coffer is laid on the ground above the pipeline, at the same time placing transversely to the pipeline front and rear faces of the coffer, each having along its lower edge an indentation of a shape adapted to the cylindrical shape of the cylindrical pipeline, the coffer is buried in the ground substantially until the indentations are brought up against the pipeline, soil material is removed between the front and rear faces of the coffer in order to give access to an upper part of the wall of the pipeline, a duct in the form of an arc of a circle is engaged under the pipeline, at the same time being pushed along the lower part of the wall of the pipeline, a prestressing reinforcement is threaded into this duct, and the armature is clamped and anchored around the pipeline.

Growing community of inventors

Fontenay-aux-Roses, France

Benoit Lecinq