A positioning and installation device for portal bars on the top slab and stirrups of tooth plates of precast box girders

Abstract

The present invention relates to a positioning and installation device for portal bars and web stirrups of the top slab of a precast box girder, which includes portal bars, web stirrups, top slab stirrups, a first positioning member, a second positioning member, a third positioning member, a first limiting member, a second limiting member and an operation platform; the first positioning member, the second positioning member and the third positioning member are all perpendicularly welded to the operation platform; the portal bars are fixed to the operation platform through the first positioning member, the second positioning member and the third positioning member; the top slab stirrups are fixed to the top of the portal bars through the second positioning member; the web stirrups are fixed to the top of the top slab stirrups through the third positioning member; the first limiting member is welded to a long side of the operation platform; the second limiting member is welded to a wide side of the operation platform. The present invention can effectively ensure the exposed height, spacing and alignment of portal bars in different segments of the top slab of all box girders, and can ensure the precise arrangement spacing dimensions of web stirrups and top slab stirrups. The intersection points can ensure the force of the entire network, increase the stiffness and reduce the deformation.

Description

Technical Field

[0001] The present invention relates to the technical field of precast box girder construction, and particularly to a positioning and installation device for portal bars on the top plate and web bars of precast box girders. Background Art

[0002] In recent years, with the rapid development of construction projects and the continuous innovation of engineering construction technologies, bridge engineering construction has received increasing attention. Box girders are an important part of modern bridges. Therefore, it is necessary to strengthen the quality control of box girders to better ensure the quality of bridge projects. In actual operation, it is very easy to cause uneven stirrup spacing, loose control of the height of embedded bars, and poor thickness difference of the stirrup protection layer on the top plate due to inaccurate positioning and arrangement of stirrups, thus affecting the load-bearing performance of box girders. Therefore, in order to better guarantee the project quality, it is necessary to further strengthen quality control and strictly control the construction technology, so as to better guarantee the project quality and further promote the construction and development of highway projects. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and meet the actual needs, and provide a positioning and installation device for portal bars on the top plate and web bars of precast box girders.

[0004] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is as follows:

[0005] A positioning and installation device for portal bars on the top plate and web bars of precast box girders, comprising portal bars, web bars, top plate stirrups, a first positioning member, a second positioning member, a third positioning member, a first limiting member, a second limiting member, and an operation platform;

[0006] The operation platform is of a rectangular long plate structure;

[0007] The first positioning member, the second positioning member, and the third positioning member are respectively perpendicularly welded to the operation platform;

[0008] The top plate stirrups are fixed to the operation platform through the first positioning member, the second positioning member, and the third positioning member;

[0009] The top plate stirrups are fixed to the top of the portal bars through the second positioning member;

[0010] The web bars are fixed to the top of the top plate stirrups through the third positioning member;

[0011] The first limiting member is welded to a long side of the operation platform, and the first limiting member is arranged parallel to the top plate stirrups;

[0012] The second limiting member is welded to a wide side of the operation platform, and the second limiting member abuts against one end of the top plate stirrup. The second limiting member is perpendicular to the first limiting member and perpendicular to the top plate stirrup.

[0013] The present invention is applicable to the integral welding of portal bars, tooth plate stirrups, and top plate stirrups, and the integral welding of portal bars and top plate stirrups. It can effectively ensure the exposed height, spacing, and linearity of portal bars in different segments of all box girder top plates, and can ensure the accurate arrangement spacing dimensions of tooth plate stirrups and top plate stirrups. The intersection points can ensure the force of the entire network, increase stiffness, and reduce deformation.

[0014] Preferably, a plurality of legs are provided at the bottom of the operation platform, and the legs are H-shaped steel.

[0015] Preferably, the first positioning member, the second positioning member, the third positioning member, the first limiting member, the second limiting member, and the operation platform are processed and manufactured from plastic steel templates or steel templates, channel steels, square steels, and angle steels.

[0016] Preferably, the first positioning member, the second positioning member, and the third positioning member are all of L-shaped plate structures.

[0017] Preferably, a plurality of portal bars are provided, and one first positioning member is arranged on each side of each portal bar.

[0018] Preferably, the setting methods of the first positioning members on both sides of the portal bar include relative setting of outer corners, relative setting of inner corners, or relative setting of one outer corner and one inner corner.

[0019] Preferably, there are three tooth plate stirrups.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The present invention is applicable to the integral welding of portal bars, tooth plate stirrups, and top plate stirrups, and the integral welding of portal bars and top plate stirrups. It can effectively ensure the exposed height, spacing, and linearity of portal bars in different segments of all box girder top plates, and can ensure the accurate arrangement spacing dimensions of tooth plate stirrups and top plate stirrups. The intersection points can ensure the force of the entire network, increase stiffness, and reduce deformation.

[0022] The present invention installs the top plate stirrups on the portal bars, reducing the secondary installation process of the portal bars and effectively avoiding the problem of stepping on the top plate stirrups during the installation of the portal bars.

[0023] The present invention has a simple structure, is easy to operate, has high flexibility, good economy, high safety, and guaranteed construction quality. It can be widely applied to the construction process of top plate stirrups of various precast box girders, with remarkable benefits. Description of the Drawings

[0024] Figure 1Schematic structural diagram of an embodiment of a positioning and installation device for portal bars and ribbed plate stirrups on the top slab of a precast box girder according to the present invention;

[0025] Figure 2 Front view structural diagram of the device of the present invention;

[0026] Figure 3 Top view structural diagram of the device of the present invention.

[0027] Description of reference numerals in the figure:

[0028] 1. Portal bar; 2. Ribbed plate stirrup; 3. Top slab stirrup; 4. First positioning member; 5. Second positioning member; 6. Third positioning member; 7. First limiting member; 8. Second limiting member; 9. Operation platform; 10. Leg. Detailed implementation manners

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Embodiment 1

[0031] As Figures 1 - 3 shown, this embodiment provides a positioning and installation device for portal bars and ribbed plate stirrups on the top slab of a precast box girder, including a portal bar 1, a ribbed plate stirrup 2, a top slab stirrup 3, a first positioning member 4, a second positioning member 5, a third positioning member 6, a first limiting member 7, a second limiting member 8, and an operation platform 9.

[0032] As Figures 1 - 3 shown, and specifically with reference to the orientation of Figure 1 , the operation platform 9 of this embodiment is a rectangular long plate structure; the first positioning member 4, the second positioning member 5, the third positioning member 6, the first limiting member 7, the second limiting member 8, and the operation platform 9 are manufactured by processing plastic-steel templates or steel templates, channel steels, square steels, and angle steels; the first positioning member 4, the second positioning member 5, the third positioning member 6, and the first limiting member 7 are all L-shaped plate structures, and the second limiting member 8 is a U-shaped plate structure; the first positioning member 4 can be vertically welded to the operation platform 9 according to the horizontal spacing dimension of the design drawing of the portal bar 1; the third positioning member 6 can be welded to the operation platform 9 according to the position dimension of the design drawing of the ribbed plate stirrup 2; the second positioning member 5 can be welded to the operation platform 9 according to the dimension of the design drawing of the top slab stirrup 3; the positions of the first limiting member 7 and the first positioning member 4 can be adjusted and processed according to the position dimension of the design drawing of the portal bar 1;

[0033] There are three portal bars 1 in this embodiment, and each portal bar 1 is fixed to the operation platform 9 through the first positioning member 4, and as Figure 3 shown, the setting methods of the first positioning members 4 on both sides of the portal bar 1 in this embodiment include the outer-angle relative setting A, the inner-angle relative setting B, or the one-outer-angle-one-inner-angle relative setting C;

[0034] The top plate stirrup 3 is fixed to the top of the portal-shaped reinforcement 1 through the second positioning member 5; there are three tooth plate stirrups 2, and the tooth plate stirrups 2 are fixed to the top of the top plate stirrup 3 through the third positioning member 6;

[0035] The first limiting member 7 is welded to a long side of the operation platform 9, and the first limiting member 7 is arranged in parallel with the top plate stirrup 3; the second limiting member 8 is welded to a wide side of the operation platform 9, and the second limiting member 8 abuts against one end of the top plate stirrup 3. The second limiting member 8 is arranged perpendicular to the first limiting member 7 and perpendicular to the top plate stirrup 3.

[0036] As Figure 1 shown, a plurality of legs 10 are provided at the bottom of the operation platform 9 of this embodiment, and the legs 10 are H-shaped steel.

[0037] Working principle: As Figures 1 - 3 shown, before welding the jig, select the materials suitable for the site for cutting and processing of the operation platform 9, the legs 10, and the limit positioning fixtures. First, weld the second limiting member 8 and the first limiting member 7 on the operation platform 9, and then design the type, size, and position of the portal-shaped reinforcement 1, the tooth plate stirrup 2, and the top plate stirrup 3, and measure and mark the positioning positions on the operation platform 9;

[0038] As Figure 3 shown, according to the measured and marked positioning positions on the operation platform 9, position cards are welded on the operation platform 9. In the figure, the first positioning member 4, the second positioning member 5, and the third positioning member 6 can all position the top plate stirrup 3 to ensure the linearity and strength of the top plate stirrup 3 after processing; among them, the height of the first positioning member 4 can be controlled within 5 cm - 8 cm, and it can be vertically welded to the operation platform 9 in the way of setting A with opposite outer corners, setting B with opposite inner corners, or setting C with one outer corner and one inner corner opposite;

[0039] As Figure 3 shown, the length of the third positioning member 6 is controlled within 8 cm - 10 cm. When welding the second positioning member 5 and the third positioning member 6, pay attention to avoiding conflicts with the type of the top plate stirrup 3;

[0040] As Figure 1 shown, the legs 10 can be controlled according to the height of the welder, and it is generally appropriate to be 60 cm - 80 cm.

[0041] As Figure 2 shown, when processing the combination of the tooth plate stirrup 2 + the portal-shaped reinforcement 1, first place the portal-shaped reinforcement 1 at the bottom layer, place the top plate stirrup 3 at the second layer, and one side of the top plate stirrup 3 abuts against the second limiting member 8, and then weld. Finally, place the three tooth plate stirrups 2 on the upper layer of the top plate stirrup 3 in the order of first two sides and then middle and weld. After welding is completed, take it out and perform the next group of welding;

[0042] When using the combination of the top plate steel bars 3 and the portal-shaped bars 1, first place the portal-shaped bars 1 at the bottommost layer, place the top plate stirrups 3 at the second layer, and make one side of the top plate stirrups 3 abut against the second limiting member 8, then perform welding. After the welding is completed, take it out and proceed with the next group of welding.

[0043] The present invention is applicable to the overall welding of the portal-shaped bars 1, the tooth plate stirrups 2, and the top plate stirrups 3, and the overall welding of the portal-shaped bars 1 and the top plate stirrups 3. It can effectively ensure the exposed height, spacing, and alignment of the portal-shaped bars 1 in different segments of all box girder top plates, and can also ensure the precise arrangement spacing dimensions of the tooth plate stirrups 2 and the top plate stirrups 3. The intersection points can ensure the force of the entire network, increase the stiffness, and reduce the deformation.

[0044] The embodiments disclosed in the present invention are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A positioning and installation device for the portal bars of the top slab and the stirrups of the tooth plates of precast box girders, characterized in that: It includes a portal rib (1), a tooth plate stirrup (2), a top plate stirrup (3), a first positioning member (4), a second positioning member (5), a third positioning member (6), a first limiting member (7), a second limiting member (8) and an operation platform (9); The operation platform (9) is of a rectangular long plate structure; The first positioning member (4), the second positioning member (5) and the third positioning member (6) are respectively vertically welded on the operation platform (9); The top plate stirrup (3) is fixed on the operation platform (9) through the first positioning member (4), the second positioning member (5) and the third positioning member (6); The top plate stirrup (3) is fixed on the top of the portal rib (1) through the second positioning member (5); The tooth plate stirrup (2) is fixed on the top of the top plate stirrup (3) through the third positioning member (6); The first limiting member (7) is welded on a long side of the operation platform (9), and the first limiting member (7) is arranged parallel to the top plate stirrup (3); The second limiting member (8) is welded on a wide side of the operation platform (9), and the second limiting member (8) abuts against one end of the top plate stirrup (3). The second limiting member (8) is perpendicular to the first limiting member (7) and perpendicular to the top plate stirrup (3); A plurality of legs (10) are provided at the bottom of the operation platform (9), and the legs (10) are H-shaped steel; The first positioning member (4), the second positioning member (5), the third positioning member (6), the first limiting member (7), the second limiting member (8) and the operation platform (9) are manufactured by processing plastic-steel templates or steel templates, channel steels, square steels, angle steels.

2. The positioning and installation device for the portal bars on the top slab and the stirrups of the tooth plate of a precast box girder according to claim 1, characterized in that: The first positioning member (4), the second positioning member (5) and the third positioning member (6) are all of L-shaped plate structures.

3. The positioning and installation device for the portal reinforcement bars on the top slab and the tooth plate stirrups of a precast box girder according to claim 2, characterized in that: A plurality of portal ribs (1) are provided, and one first positioning member (4) is arranged on each side of each portal rib (1).

4. The positioning and installation device for the portal bars on the top slab and the stirrups of the tooth plates of a precast box girder according to claim 3, characterized in that: The setting methods of the first positioning members (4) on both sides of the portal rib (1) include opposite outer corners, opposite inner corners or one outer corner and one inner corner being opposite.

5. The positioning and installation device for the portal reinforcement bars of the top slab and the stirrups of the tooth plate of a precast box girder according to claim 1, characterized in that: Three tooth plate stirrups (2) are provided.

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