Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The anchoring device, for anchoring at least two reinforcements for prestressing a civil engineering works structure, has a block through which there pass at least two pairs of anchoring orifices arranged symmetrically on each side of a mid-plane of the block. The two orifices of each pair have axes substantially parallel to the mid-plane and are directed toward two opposite sides of the block to take, respectively, two ends of a taut reinforcement surrounding the structure. The block has a bearing zone pressed against the structure in response to the tension in the reinforcements.

Abstract: 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.

Abstract: The anchoring device is provided with at least two prestressing reinforcements for a work structure (3) and comprises a block (1) with at least two pairs anchoring openings (4) extending therethrough and which are disposed symmetrically on both sides of the median plane of the block (1), wherein the two openings of each pair have axes which are substantially parallel to said median plane and are oriented towards two opposite sides of the block (1) in order to respectively receive two ends (11) of a tensed reinforcement surrounding said structure (3) and wherein said block (1) is provided with a hearing zone (2) which is pressed against the structure (3) in order to react to the tension of the reinforcements.

Abstract: A process of manufacturing concrete construction elements is provided. A first sheath is placed in a first mold, the first sheath connected at an end to a first sleeve applied against a wall of the mold, the sleeve engaging a positioning boss placed on the wall. Concrete is poured into the first mold and set to obtain the first element. The first element is extracted from the first mold and includes a contact face shaped by the wall. A second sheath is placed in a second mold, the second mold having one side formed by the contact face. The second sheath includes an end connected to a second sleeve held in position relative to the first sleeve by a positioning joint. Concrete is poured into the second mold and set to obtain a second element. The second element is extracted from the second mold by disengaging the positioning joint.

Abstract: The invention provides an anchoring device for a pre-stress cable formed from several filaments or strands (4), comprising a bearing plate (1), a block (2) pierced with truncated cone shaped holes (2.sub.1) through each of which passes a filament or strand of the cable, said block resting on said plate and truncated cone shaped jaws (3) for jamming the filaments or strands in their holes. The bearing plate (1) is pierced with multiple holes (1.sub.1) extending those (2.sub.1) of the block (2) so that this plate supports this block over the whole of its non pierced surface.