CN217174385U

CN217174385U - Longitudinal prestress tensioning frame after die change of whole-hole prefabricated box girder of highway

Info

Publication number: CN217174385U
Application number: CN202220194291.2U
Authority: CN
Inventors: 张亚海; 李建龙; 沈伟; 李晓龙; 吕丕根; 闻斯洋
Original assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Priority date: 2022-01-24
Filing date: 2022-01-24
Publication date: 2022-08-12
Anticipated expiration: 2032-01-24

Abstract

The utility model relates to a longitudinal prestress tensioning frame after reforming a highway whole-hole prefabricated box girder, which comprises a steel pipe stand column, a cross rod and a supporting leg, wherein two upper limiting shaft sleeves are welded on the outer wall of the steel pipe stand column; the upper ends of the supporting legs are welded with the cross bar, and the lower ends of the supporting legs are provided with universal wheels; a supporting plate is welded on the outer wall of the steel pipe upright column in the circumferential direction, and the height of the bottom surface of the supporting plate is equal to that of the bottom of the universal wheel; a track pulley is arranged on the cross rod, a chain block is hung at the bottom of the track pulley, and a tensioning jack is hung at the lower end of the chain block. The utility model discloses utilize the hole for hoist on the precast beam to support at the box girder top, but multi-angle rotating can carry out stretch-draw to the vertical prestress wire of the different positions of precast beam tip.

Description

Longitudinal prestress tensioning frame after die change of whole-hole prefabricated box girder of highway

Technical Field

The utility model belongs to the technical field of the precast construction of box girder among the bridge engineering, concretely relates to vertical prestressing force stretch-draw frame behind whole hole precast box girder reform mould of highway, its main function is to hang the jack-tensioner and accomplish the prestressing force stretch-draw.

Background

The prefabricated case roof beam of highway compares in railway prefabricated case roof beam type many, when the construction of precast beam field, receive the restriction of investigation area condition, the prefabrication pedestal is extremely limited, it sets up prefabricated pedestal alone to reach every kind of prefabricated case roof beam of striding footpath, the prefabrication of other little footpath roof beam types is often accomplished in the template retooling on the case roof beam pedestal of adopting the big footpath of striding during concrete construction, but the longitudinal prestressing force stretch-draw of little footpath case roof beam one end after the retooling can't use the longitudinal prestressing force stretch-draw frame of current big footpath case roof beam, can only use the portal crane to stretch-draw at present, the operation is inconvenient, the difficult removal of stretch-draw jack is counterpointed, and occupy the portal crane and still can influence other process constructions.

Disclosure of Invention

The utility model aims at the above-mentioned problem, a vertical prestressing force stretch-draw frame that is used for after whole hole prefabricated box girder reform mould of highway is provided.

The technical scheme of the utility model as follows:

the utility model provides a longitudinal prestress tensioning frame after whole hole precast box girder die change of highway which characterized in that: comprises a steel pipe upright post, a cross bar and a supporting leg; two upper limiting shaft sleeves are welded on the outer wall of the steel pipe stand column, close to the upper end of the steel pipe stand column, and are sleeved at a certain interval, the shaft centers are on a straight line, and the shaft centers are parallel to the shaft centers of the steel pipe stand columns; the transverse rod is perpendicular to the steel pipe upright column, one end of the transverse rod is welded with an upper movable shaft sleeve, the upper movable shaft sleeve is positioned between two upper limiting shaft sleeves, a rotating shaft is inserted into the two upper limiting shaft sleeves and the upper movable shaft sleeve, and a limiting block is arranged at the upper end of the rotating shaft; the supporting legs are arranged in parallel with the steel pipe upright posts, the upper ends of the supporting legs are welded with the bottom surfaces of the cross rods, and the lower ends of the supporting legs are provided with universal wheels; a supporting plate is welded on the outer wall of the steel pipe upright column in the circumferential direction, and the height of the bottom surface of the supporting plate is equal to that of the bottom of the universal wheel; the rail pulley is arranged on the cross rod and can longitudinally slide along the cross rod, a chain block is hung at the bottom of the rail pulley, and a tensioning jack is hung at the lower end of the chain block.

The utility model discloses simple structure adopts the shaped steel of job site to make, utilizes the hole for hoist activity on the precast beam to support at the case roof beam top, but stretch-draw frame multi-angle rotating can carry out stretch-draw to the vertical prestress wire of different positions. The utility model discloses stretch-draw construction does not need other equipment supplementary, convenient operation, and construction cost is low. The utility model discloses also can be used to the stretch-draw of ordinary precast beam prestressing force.

Drawings

FIG. 1 is a schematic view of the side view structure and the operation state of the present invention;

fig. 2 is a front view of the present invention.

Detailed Description

As shown in fig. 1 and 2, the present invention comprises a steel tube column 1, a cross bar 2 and a leg 3; two upper limiting shaft sleeves 11 are welded on the outer wall of the steel pipe upright post 1, close to the upper end of the steel pipe upright post, a certain distance is reserved between the two upper limiting shaft sleeves, the shaft centers are on a straight line, and the shaft centers are parallel to the shaft center of the steel pipe upright post; the cross rod 2 is perpendicular to the steel pipe column, one end of the cross rod is welded with an upper movable shaft sleeve 21, the upper movable shaft sleeve is positioned between two upper limiting shaft sleeves, a rotating shaft 4 is inserted into the two upper limiting shaft sleeves and the upper movable shaft sleeve, and a limiting block 41 is arranged at the upper end of the rotating shaft 4; the supporting legs 3 are arranged in parallel with the steel pipe upright posts 1, the upper ends of the supporting legs are welded with the bottom surfaces of the cross rods, and universal wheels 31 are arranged at the lower ends of the supporting legs; a supporting plate 12 is circumferentially welded on the outer wall of the steel tube upright, and the height of the bottom surface of the supporting plate 12 is equal to that of the bottom of the universal wheel 31; the rail 2 is provided with a rail pulley 5 capable of sliding longitudinally along the rail, a chain block 6 is hung at the bottom of the rail pulley 5, and a pulling jack 7 is hung at the lower end of the chain block 6.

In the structure, the cross rod 2 can rotate around the rotating shaft 4 at will.

As shown in fig. 2, in the embodiment of the present invention, the cross bar 2 can be made of i-steel, the track pulley 5 is a U-shaped structure, and two pulleys 51 are respectively disposed on two opposite side walls of the track pulley, and are respectively supported on top surfaces of two sides of the bottom flange plate of the i-steel beam.

When the utility model is implemented, in order to enhance the stress performance of the cross bar, a diagonal brace 8 can be welded on the bottom surface of the cross bar, one end of the diagonal brace 8 is welded with the cross bar, and the other end is welded with a movable rotating shaft 81; two lower limiting shaft sleeves 13 are welded below the two upper limiting shaft sleeves on the outer wall of the steel pipe upright post 1, a certain distance is reserved between the two lower limiting shaft sleeves, the shaft center of each lower limiting shaft sleeve and the shaft center of each upper limiting shaft sleeve are on the same line, a lower movable shaft sleeve 81 at the end part of the diagonal brace is positioned between the two lower limiting shaft sleeves 13, and the rotating shaft 4 simultaneously penetrates through the two upper limiting shaft sleeves 11, the upper movable shaft sleeves 21, the two lower limiting shaft sleeves 13 and the lower movable shaft sleeve 81.

As shown in figure 1, the utility model discloses during the use, insert 1 lower extreme of steel pipe stand in the hole for hoist of tip on the precast beam 8, the diameter of backup pad 12 on the steel pipe stand is greater than the diameter of hole for hoist, supports at precast beam 8 top surface, and universal wheel 31 of 3 lower extremes of landing leg also supports at precast beam top surface, and 2 tip of horizontal pole extend to the precast beam tip outside. The height of the tensioning jack 7 can be adjusted through the chain block 6, the horizontal position of the jack can be adjusted through rotating the cross rod and the sliding track pulley, and the prefabricated beam longitudinal prestress steel strands 9 at different positions are tensioned.

Claims

1. The utility model provides a longitudinal prestress tensioning frame after whole hole precast box girder die change of highway which characterized in that: comprises a steel tube upright post, a cross bar and a supporting leg; two upper limiting shaft sleeves are welded on the outer wall of the steel pipe stand column, close to the upper end of the steel pipe stand column, and are sleeved at a certain interval, the shaft centers are on a straight line, and the shaft centers are parallel to the shaft centers of the steel pipe stand columns; the transverse rod is perpendicular to the steel pipe upright column, one end of the transverse rod is welded with an upper movable shaft sleeve, the upper movable shaft sleeve is positioned between two upper limiting shaft sleeves, a rotating shaft is inserted into the two upper limiting shaft sleeves and the upper movable shaft sleeve, and a limiting block is arranged at the upper end of the rotating shaft; the supporting legs are arranged in parallel with the steel pipe upright posts, the upper ends of the supporting legs are welded with the bottom surfaces of the cross rods, and the lower ends of the supporting legs are provided with universal wheels; a supporting plate is welded on the outer wall of the steel pipe upright column in the circumferential direction, and the height of the bottom surface of the supporting plate is equal to that of the bottom of the universal wheel; the rail pulley is arranged on the cross rod and can longitudinally slide along the cross rod, a chain block is hung at the bottom of the rail pulley, and a tensioning jack is hung at the lower end of the chain block.

2. The longitudinal prestress tensioning frame for the whole-hole prefabricated highway box girder after the form change according to claim 1, wherein: the transverse rod is made of I-shaped steel, the track pulley is of a U-shaped structure, two opposite side walls of the track pulley are respectively provided with a pulley, and the two pulleys are respectively supported on the top surfaces of two sides of a lower flange plate of the I-shaped steel transverse beam.

3. The longitudinal prestress tensioning frame for the whole-hole prefabricated highway box girder after the form change according to claim 1, wherein: an inclined strut is welded on the bottom surface of the cross rod, one end of the inclined strut is welded with the cross rod, and the other end of the inclined strut is welded with a lower movable rotating shaft; two lower limiting shaft sleeves are welded below the two upper limiting shaft sleeves on the outer wall of the steel pipe stand column, a certain distance is reserved between the two lower limiting shaft sleeves, the axis of the two lower limiting shaft sleeves is aligned with the axis of the two upper limiting shaft sleeves, the lower movable shaft sleeve at the end part of the diagonal brace is positioned between the two lower limiting shaft sleeves, and the rotating shaft penetrates through the two upper limiting shaft sleeves, the upper movable shaft sleeve, the two lower limiting shaft sleeves and the lower movable shaft sleeve simultaneously.