CN211228136U

CN211228136U - Combined construction platform for hogging moment tensioning of prefabricated T-shaped beam

Info

Publication number: CN211228136U
Application number: CN201921582510.9U
Authority: CN
Inventors: 唐永; 赵迎春; 时伟
Original assignee: CCCC Fourth Highway Engineering Co Ltd
Current assignee: CCCC Fourth Highway Engineering Co Ltd
Priority date: 2019-09-21
Filing date: 2019-09-21
Publication date: 2020-08-11
Anticipated expiration: 2029-09-21

Abstract

The utility model provides a combined construction platform for the hogging moment tensioning of a prefabricated T beam, which comprises a middle cross beam, wherein two sides of the middle cross beam are respectively provided with a side cross beam, and the two side cross beams are respectively connected with the middle cross beam through a plurality of connecting rods; the middle cross beam and the side cross beams are both of sheet truss structures, and two ends of the upper chord are respectively longer than two ends of the lower chord by a certain length; a plurality of vertical jacks are respectively arranged at two sides of the middle cross beam and at one side of the cross beams at two sides facing the middle cross beam, and a plug protruding downwards is arranged at two ends of each connecting rod and is respectively inserted into two opposite jacks on the middle cross beam and the side cross beams; and paving square timbers on the connecting rods along the direction parallel to the middle cross beam and the side cross beams. The utility model discloses at hogging moment stretch-draw job site equipment, support between two prefabricated T roof beams, but furthest utilizes the space, provides great operating surface for hogging moment stretch-draw construction.

Description

Combined construction platform for hogging moment tensioning of prefabricated T-shaped beam

Technical Field

The utility model relates to a bridge construction technical field, when concretely relates to wet seam construction of prefabricated T roof beam of bridge, carry out the construction platform of stretch-draw to prefabricated T roof beam hogging moment.

Background

A plurality of prefabricated T-shaped beams are spliced during construction of the simply supported and continuous beam bridge, and negative moment tensioning is needed to be carried out on the prefabricated beam plates during splicing. The tension construction is carried out at the wet joint between two beam plates, the conventional hogging moment tension method is that a hanging basket is put down at the reserved position of the wet joint, and constructors operate a jack on the hanging basket to carry out hogging moment tension. Because the space at the wet joint is narrow, the volume of the hanging basket which can be placed downwards is small, an operator cannot move on the hanging basket, and cannot find a proper position to install the jack, so that the operation is extremely inconvenient; during tensioning, operators cannot avoid the rear end of the jack, and potential safety hazards exist.

Disclosure of Invention

The utility model aims at that the problem of hogging moment stretch-draw hanging flower basket operation space is little, construction is inconvenient provides one kind and can utilize wet seam crossing space by furthest, easy to assemble and dismantlement, and intensity, rigidity, stability all satisfy the interim construction platform for hogging moment stretch-draw of safety requirement.

The technical scheme of the utility model as follows:

the utility model provides a combination formula construction platform for prefabricated T roof beam hogging moment stretch-draw which characterized in that: the device comprises a middle cross beam which is horizontally arranged, side cross beams which are parallel to the middle cross beam are respectively arranged at a certain distance from the two sides of the middle cross beam, and the two side cross beams are respectively connected with the middle cross beam through a plurality of connecting rods; the middle cross beam and the side cross beams are of sheet truss structures and comprise upper chord members and lower chord members, the upper chord members and the lower chord members are connected through a plurality of vertical rods and inclined support rods, and two ends of each upper chord member are respectively longer than two ends of each lower chord member by a certain length; the two sides of the middle cross beam and the sides of the cross beams on the two sides, which face the middle cross beam, are respectively provided with a plurality of vertical jacks, the two ends of each connecting rod are respectively provided with a plug which protrudes downwards, and the plugs at the two ends of each connecting rod are respectively inserted into two jacks which are just opposite to each other on the middle cross beam and the side cross beams; and paving square timbers on the connecting rods along the direction parallel to the middle cross beam and the side cross beams.

The utility model discloses utilize prefabricated T roof beam middle part cross section to be less than the structural feature of lower part cross section, support construction platform between two prefabricated T roof beams, but the space of wet seam below of furthest utilization. Each part forms an interim construction platform at wet seam below on-the-spot equipment, compares in the tradition and hangs the basket, the utility model discloses operating space is great, personnel convenient operation, safety. The platform can be dismantled to turnover use after hogging moment stretch-draw construction is accomplished.

Drawings

Fig. 1 is a schematic plan view of the present invention (not shown is a square wood laid on the top of the platform);

fig. 2 is a schematic side view of the present invention;

fig. 3 is a schematic cross-sectional structure of the present invention;

FIG. 4 is a schematic top view of the cross member;

FIG. 5 is a side view of a connecting rod;

fig. 6 is a schematic view of the usage state of the present invention.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 3, the utility model discloses a middle cross beam 1 that a level set up, establish respectively one with middle cross beam parallel limit crossbeam 2 apart from 1 both sides certain distance of middle cross beam, both sides crossbeam 2 is connected through many connecting rods 3 with middle cross beam 1 respectively.

The middle cross beam 1 and the side cross beams 2 are both of a sheet truss structure. Fig. 2 shows a structure of a side beam 2, which includes an upper chord 21 and a lower chord 22, the upper chord 21 and the lower chord 22 are connected by a plurality of vertical bars 23 and diagonal braces 24, and two ends of the upper chord 21 are respectively longer than two ends of the lower chord 22 by a certain length. The truss structure of the middle cross beam 1 is the same as that of the side cross beam 2.

As shown in fig. 4, a plurality of vertical insertion holes 4 are respectively formed on two sides of the middle cross beam and on two sides of the cross beam facing to the middle cross beam. In specific implementation, the insertion holes 4 can be respectively arranged on the vertical rods 23. The specific setting mode is as follows: as shown in fig. 3 and 4, a horizontal support plate 6 is welded on two sides of the vertical rod of the middle cross beam and the vertical rods 23 of the cross beams on two sides close to the upper chord on one side of the middle cross beam, and through holes are formed in the support plate 6 to serve as inserting holes 4; a section of steel pipe can be vertically welded on each vertical rod to be used as the jack 4.

Each connecting rod 3 is constructed as shown in fig. 5, and has two ends provided with downward-projecting plugs 31, respectively. Plugs at two ends of each connecting rod 3 are respectively inserted into two opposite jacks 4 on the middle cross beam and the side cross beams; and the connecting rods are fully paved with square timbers 5 along the direction parallel to the middle cross beam and the side cross beams.

In order to prevent the square timber 5 laid on the top of the platform from falling, a plurality of stoppers 7 protruding upwards can be welded on the top of the upper chord of each side beam.

The cross section at prefabricated T roof beam middle part is less than the lower part cross section usually, the utility model discloses utilize the above-mentioned structural feature of prefabricated T roof beam, can support between two prefabricated T roof beams. During specific implementation, the middle cross beam, the cross beams on the two sides and the connecting rods are processed and manufactured in advance respectively. During manufacturing, according to the distance between two prefabricated T beams which are installed in place, the lengths of the upper chords of the middle cross beam and the side cross beams are smaller than the distance between two opposite side walls in the middle of the two prefabricated T beams and larger than the distance between two opposite side walls at the lower ends of the two prefabricated T beams; the length of the lower chord is slightly smaller than the distance between two opposite side walls at the lower ends of the two prefabricated T-shaped beams.

Because prefabricated T roof beam middle part lateral wall is for the inclined plane that from top to bottom leans out, for making the contact surface of well crossbeam and limit crossbeam both ends and prefabricated T roof beam coincide, during the concrete implementation, can set up the inclined plane of every well crossbeam and limit crossbeam upper chord 21 for from top to bottom leanin to paste the rubber gasket on the inclined plane, prevent to cause the damage to the roof beam body.

Further, for increasing the stability of the construction platform, a nut 8 can be welded on the two sides of the vertical rod 23 at the two ends of each middle cross beam and each side cross beam close to the lower chord 22 respectively, a bolt 9 is screwed through the nut, the bolt 9 is parallel to the lower chord 22, the front end of the bolt 9 protrudes out of the end part of the lower chord 22, and a rubber gasket is adhered to the front end of the bolt. When the platform is erected, the bolts are rotated to enable the front ends of the bolts to tightly prop the side walls of the prefabricated T-shaped beam, and the friction force between the two ends of the middle cross beam and the side cross beams and the side walls of the prefabricated T-shaped beam can be increased.

The utility model discloses on-spot equipment when hogging moment stretch-draw construction. As shown in fig. 6, the middle cross beam and the side cross beam are respectively hung between the middle parts of the two prefabricated T-beams 10 along the wet joint 11 by using a hoisting device, then the middle cross beam and the side cross beam are rotated by 90 degrees and lowered, so that the two ends of the upper chord 21 of the middle cross beam and the side cross beam are clamped between the side walls of the middle parts of the two prefabricated T-beams 10, the distance between the middle cross beam and the side cross beam is adjusted, the two ends of each connecting rod are respectively inserted into the two opposite insertion holes of the middle cross beam and the side cross beam, and each bolt 9 is rotated so that the end part of each. And finally, paving the square timber 5 on the connecting rod to complete the erection of the platform, and performing hogging moment tensioning construction on the platform by constructors. After the construction is finished, the platform is disassembled according to the sequence opposite to the assembly of the platform for the next construction.

Claims

1. The utility model provides a combination formula construction platform for prefabricated T roof beam hogging moment stretch-draw which characterized in that: the device comprises a middle cross beam which is horizontally arranged, side cross beams which are parallel to the middle cross beam are respectively arranged at a certain distance from the two sides of the middle cross beam, and the two side cross beams are respectively connected with the middle cross beam through a plurality of connecting rods; the middle cross beam and the side cross beams are of sheet truss structures and comprise upper chord members and lower chord members, the upper chord members and the lower chord members are connected through a plurality of vertical rods and inclined support rods, and two ends of each upper chord member are respectively longer than two ends of each lower chord member by a certain length; the two sides of the middle cross beam and the sides of the cross beams on the two sides, which face the middle cross beam, are respectively provided with a plurality of vertical jacks, the two ends of each connecting rod are respectively provided with a plug which protrudes downwards, and the plugs at the two ends of each connecting rod are respectively inserted into two jacks which are just opposite to each other on the middle cross beam and the side cross beams; and paving square timbers on the connecting rods along the direction parallel to the middle cross beam and the side cross beams.

2. The combined construction platform for hogging moment tensioning of prefabricated T-beam as claimed in claim 1, wherein: and two horizontal supporting plates are respectively welded on the two sides of the middle cross beam vertical rod and the positions of the two side cross beam vertical rods, which are close to the upper chord, towards the middle cross beam, and through holes are formed in the two supporting plates to serve as the jacks.

3. The combined construction platform for hogging moment tensioning of prefabricated T-beam as claimed in claim 1, wherein: and a plurality of stop blocks protruding upwards are welded at the top of the upper chord of each side cross beam.

4. The combined construction platform for hogging moment tensioning of prefabricated T-beam as claimed in claim 1, wherein: the two ends of each middle cross beam and each side cross beam upper chord are inclined planes which are inclined inwards from top to bottom, and rubber gaskets are adhered to the inclined planes.

5. The combined construction platform for hogging moment tensioning of prefabricated T-beam as claimed in claim 1, wherein: a nut is welded at the position, close to the lower chord, of the two sides of the vertical rod at the two ends of each middle cross beam and each side cross beam respectively, a bolt is in threaded connection with the nuts, the bolt is parallel to the lower chord, the front end of the bolt protrudes out of the end part of the lower chord, and a rubber gasket is pasted at the front end of the bolt.