A fire protection blanket comprising: at least two fibrous subassemblies arranged substantially parallel to a principal surface of the blanket in which each fibrous subassembly comprises at least two mineral fiber wool layers, substantially parallel to the principal surface of the blanket, separated by at least one mineral fiber fabric and in which refractory particles are arranged inside at least one mineral fiber wool layer; at least one layer of refractory adhesive attaching the fibrous subassemblies to each other; and a covering comprising a mineral fiber fabric impregnated with a fire-resistant silicone and enclosing all of the fibrous subassemblies.
A method of construction of a civil engineering structure that includes first and second superimposed components is described. According to one embodiment of the method: the second component is positioned beneath a fixed lifting structure that includes a lifting device, the second component is lifted using the lifting device, the first component is positioned beneath the fixed lifting structure substantially below the second component, and the second component is substantially placed on the first component using the lifting device, while the second component remains substantially in place.
The invention proposes a collar intended to be placed around a portion of a tube and in contact with a separator between a first space and a second space. The collar has a generally annular shape and comprises a superimposition of alternating layers of silicone adhesive and fabrics and an upper layer of silicone elastomer.
The invention proposes a disassembly process for a cable (1) stretched between a first (5) and a second (6) anchoring points on a structure (2). The process includes the following steps: loosen the cable such that a part of the cable in question is freed from one of the said first and second anchoring points; free the said part of the cable in question from the other said first and second anchoring point; support the said part of the cable in question; and release the said part of the cable in question remotely from one at least of the said first and second anchoring points.
A method of reinforcing an embedded cylinder pipe (1) by applying a composite structural reinforcement within the pipe through in situ stratification of at least one band (3) of reinforcement fibers and a resin or a resin including matrix comprising the steps of applying said band onto a contact area (4) on an internal face (2) of said pipe by means of a contacting member (40); moving said contacting member (40) along an helical path so that said contact area follows said path; moving a main pressing member (50) behind said contacting member (40) along said path, to apply pressure to said band (3) in a main pressure area (5) separated from said contact area (4). Related device for reinforcing an embedded cylinder pipe (1) by applying a composite structural reinforcement within the pipe.
A method of reinforcing an embedded cylinder pipe (1) by applying a composite structural reinforcement within the pipe through in situ stratification of at least one band (3) of reinforcement fibers and a resin or a resin including matrix comprising the steps of - applying said band onto a contact area (4) on an internal face (2) of said pipe by means of a contacting member (40); - moving said contacting member (40) along an helical path so that said contact area follows said path; - moving a main pressing member (50) behind said contacting member (40) along said path, to apply pressure to said band (3) in a main pressure area (5) separated from said contact area (4). Related device for reinforcing an embedded cylinder pipe (1) by applying a composite structural reinforcement within the pipe.
A lattice structure comprises an elongated structural element (2) and a reinforcing device for relieving a part of constraints to which said elongated structural element is exposed, wherein the reinforcing device comprises an effort distribution material which defines a block (4) supported by two substantially opposite surfaces (2a, 2b) of the elongated structural element and said efforts distribution material block (4) is pressed against the surfaces (2a, 2b) of the elongated structural element.
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.
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.
The invention therefore proposes an anchorage unit for anchoring at least one prestressing member, capable of being tensioned, onto a structural component to be strengthened or repaired by additional prestressing. The anchorage unit includes means of fixing onto the structural component and means of anchoring the prestressing member located adjacent to a first side of the anchorage unit oriented towards a regular section of the prestressing member. The fixing means are located adjacent to a second side, opposite the first side, of the anchorage unit, which is so provided that it may be put into traction when the prestressing member is tensioned.
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