Casing-device for the reinforced or prestressed concrete flange of a girder

Claim 2

A casing-device for manufacturing the lower reinforced or prestressed concrete flange of a girder, said flange having a substantially rectangular or square section and being cast independently of the girder''s web, said casing device comprising: successive soffit-sections (1) articulated to one another, each having an upper metal plate (4), means for supporting one soffit-section (1) out of two, comprising jacks (9) for givinG said soffit-section (1) a predetermined inclination or for arranging it horizontally, in order to allow the production of said lower flange with a vertical upward-or downward-deflection, a frame (14) for carrying said jacks (9), means for supporting said frame (14), comprising other jacks (10) for moving vertically said frame (14), means for actuating said last-mentioned jacks (10) in synchronism, successive side-sections (2 and 3) respectively carried without clamping by the upper plates 4 of the soffit-sections (1) on both sides thereof, each side-section (2 or 3) comprising a weighty concrete prism (56) with a metallic inner side of regulable height and bearing inwardly on the upper plate (4) of the corresponding soffit-section (1), in order to ensure the tightness between said side-section and said soffit-section, means for moving the side-sections (2 and 3) transversely on the soffit-sections (1), in order to regulate the distance between said side-sections, compressible soffit-joints (51) extending between the soffitsections (1), substantially between the alignment of the sidesections (2 and 3), and compressible side-joints (82) extending between the sidesections (2 and 3), above said soffit-joints (51).

Claim 3

A casing-device for manufacturing the lower reinforced or prestressed concrete flange of a girder, said flange having a substantially rectangular or square section and being cast independently of the girder''s web, said casing-device comprising: successive soffit-sections (1) articulated to one another, each having an upper metal plate (4), means for supporting one soffit-section (1) out of two, comprising jacks (9) for giving said soffit-section (1) a predetermined inclination or for arranging it horizontally, in order to allow the production of said lower flange with a vertical upward- or downward-deflection, a frame (14) for carrying said jacks (9), means for supporting said frame (14), comprising other jacks (10) for moving vertically said frame (14), means for actuating said last-mentioned jacks (10) in synchronism, successive side-sections, (2 and 3) respectively carried without clamping by the upper plates (4) of the soffit-sections (1) on both sides thereof, each side-section (2 or 3) comprising: a weighty concrete prism (56), a longitudinal iron (58) fixed to a lower projecting edge (57) of said prism (56) and corresponding substantially to the minimum height of the flange to be manufactured, a lower longitudinal tightness joint (63) preferably bevelled, arranged under said iron (58) and bearing on the upper plate (4) of the corresponding soffit-section (1), at least one metallic intermediate block (75) bearing on said iron (58) in alignment therewith, an upper longitudinal bar (74) sliding vertically alongside the concrete prism (56) and bearing on said iron (58) or said block (75) and determining the height of the casing, means for tightening together said iron (58), said intermediate block (75) and said bar (74), means for moving the side-sections (2 and 3) transversely on the soffit-sections (1), in order to regulate the distance between said side-sections, compressible soffit-joints (51) extending between the soffit-sections (1), substantially between the alignment of the side-sections (2 and 3), and compressible side joints (82) extending between the side-sections (2 and 3), above said soffit-joints (51).

Claim 4

A casing-device for manufacturing the lower reinforced or prestressed concrete flange of a girder, said flange having a substantially rectangular or square section and being cast independently of the girder''s web, said casing-device comprising: successive soffit-sections (1) articulated to one another, each having an upper metal plate (4), means for supporting one soffit-section (1) out of two, comprising jacks (9) for giving said soffit-section (1) a predetermined inclination or for arranging it horizontally, in order to allow the production of said lower flange with a vertical upward- or downward-deflection, a frame (14) for carrying said jacks (9), means for supporting said frame (14), comprising other jacks (10) for moving vertically said frame (14), means for actuating said last-mentioned jacks (10) in synchronism, successive side-sections, (2 and 3) respectively carried without clamping by the upper plates (4) of the soffit-sections (1) on both sides thereof, each side-section (2 or 3) comprising: a weighty concrete prism (56), a longitudinal iron (58) fixed to a lower projecting edge (57) of said prism (56) and corresponding substantially to the minimum height of the flange to be manufactured, a lower longitudinal tightness joint (63) preferably bevelled, arranged under said iron (58) and bearing on the upper plate (4) of the corresponding soffit-section (1), at least one metallic intermediate block (75) bearing on said iron (58) in alignment therewith, an upper longitudinal bar (74) sliding vertically alongside the concrete prism (56) and bearing on said iron (58) or said block (75) and determining the height of the casing, means for tightening together said iron (58), said intermediate block (75) and said bar (74), means for moving the side-sections (2 and 3) transversely on the soffit-sections (1), in order to regulate the distance between said side-sections, compressible soffit-joints (51) extending between the soffit-sections (1), substantially between the alignment of the side-sections (2 and 3), and compressible side joints (82) extending between the side-sections (2 and 3), above said soffit-joints (51).

Claim 5

A casing-device according to claim 2 in which each side-section (2 or 3) rests on the corresponding soffit-section (1) only with its lower tightness joint (63) fixed to its inner edge (57) and with its outer edge, in order to achieve a maximum unit clamping of said inner edge on said soffit-section (1).

Claim 6

A casing-device according to claim 3 in which an additional tightness clamping is achieved by means of press screws (89), only at the ends of the side-sections (1), opposite the openings between the soffit-sections (1), wiThout any perforation of said soffit-sections (1) nor intermediate clamping points on said side-sections (2 and 3).

Claim 7

A casing-device according to claim 1 in which the compressible soffit-joints (51) are interchangeable and inserted between said soffit-sections (1) in a precompressed or pretensioned state.

Claim 8

A casing-device according to claim 1 in which the compressible side-joints (82) are interchangeable and inserted between said side-sections (2 and 3) in a precompressed or pretensioned state.

Claim 9

A casing-device according to claim 1 in which the means for moving the side-sections (2 and 3) transversely on the soffit-sections (1) comprises transversal threaded rods (98), located in the lower part of the openings between the soffit-sections (1) and drawing the ends of the side-sections (2 and 3) by means of slippers (87 to 97).

Claim 10

A casing-device according to claim 7, in which the threaded rods (98) are operated in synchronism on the whole length of the casing and separately on each side of this casing by two synchronizing mechanisms.

Claim 11

A casing-device according to claim 8, in which said two synchronizing mechanisms are also synchronized.

Claim 12

A casing-device according to claim 1, in which the jacks (10) used for the withdrawal or the replacement of the whole casing are mounted on trucks (38) allowing the longitudinal shift of said whole casing without any change in its vertical polygonal shape.