Device for preventing hoisting overturning of single steel box girder

Abstract

The utility model provides a device for preventing hoisting overturning of a single steel box girder, which belongs to the technical field of hoisting overturning prevention of steel box girders and comprises an arc-shaped box girder and cross beams, the cross beams are arranged on two end sides of the arc-shaped box girder, the cross beams are arranged on the outer side of the arc-shaped bending direction of the arc-shaped box girder, and during hoisting, hoisting ropes are bound on the end part of the arc-shaped box girder and the cross beams. The two cross beams are arranged at the two ends of the arc-shaped box girder, and the hoisting rope is bound at the end parts of the cross beams and the arc-shaped box girder during hoisting, so that the gravity center of the arc-shaped box girder can be controlled at the middle position of the arc bend of the arc-shaped box girder, the arc-shaped box girder is kept balanced during hoisting, and the overturning condition is avoided; meanwhile, the cross beam can also be used as a balance fixing device during installation, if the width of a road is equal to that of a single-box arc-shaped box beam, the cross beam can be directly used as a long-term balance supporting device of the arc-shaped box beam, and the effect of achieving multiple purposes at one stroke is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-overturning for steel box girder hoisting, in particular to a device for preventing single-piece steel box girder from overturning during hoisting. Background Art

[0002] Steel box girders have good bending resistance, reliable torsional resistance and large spanning ability, and have been widely used in the design of urban bridges with limited land use; however, they have a relatively light self-weight, which is not conducive to the lateral anti-overturning of the structure. Especially during the hoisting process, it is easy to overturn.

[0003] Chinese patent with the publication number of CN213653170U discloses an anti-overturning structure applicable to small-radius curve steel box girders, including a bridge pier body and a small-radius curve steel box girder; two groups of double bearings are fixed on both sides of the top surface of the bridge pier body; each group of double bearings is respectively arranged on both sides of the axis line of the bottom surface of the small-radius curve steel box girder; two rows of anti-overturning tie rods are pre-buried and cast on both sides of the bearing of the bridge pier body; the top of the anti-overturning tie rod passes through the bottom hole seat and backing plate of the small-radius curve steel box girder; the backing plate is pressed against the top surface of the bottom hole seat; a pressing nut is screwed on the top surface of the backing plate of the anti-overturning tie rod. This device is to fix and place the box girder to prevent overturning in the later stage. However, during hoisting, since the center of the arc-shaped box girder is not on the connection line of the two fulcrums, it is easy to overturn. Therefore, it is necessary to design a device for preventing single-piece arc-shaped steel box girder from overturning during hoisting. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for preventing single-piece steel box girder from overturning during hoisting, and solve the technical problem that the existing arc-shaped single-piece steel box girder is easy to overturn during hoisting.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] A device for preventing single-piece steel box girder from overturning during hoisting, including an arc-shaped box girder and a cross beam. The cross beam is arranged on the side edges at both ends of the arc-shaped box girder, and the cross beam is arranged on the outer side of the arc-shaped bending direction of the arc-shaped box girder. During hoisting, the hoisting rope is tied to the end of the arc-shaped box girder and the cross beam.

[0007] Furthermore, the cross beam and the arc-shaped box girder are detachably arranged. When hoisting is required, the cross beam is installed at both ends of the arc-shaped box girder.

[0008] Furthermore, side plates of the box girder end are arranged on the outer side of the end of the arc-shaped box girder, bolt holes of the side plates of the box girder end are arranged on the side plates of the box girder end, and the cross beam is connected and fixed to the side plates of the box girder end through bolts.

[0009] Furthermore, the above scheme also includes a column. The lower end of the column is connected to the top end of the bridge pier, and the cross beam is connected to the top end of the column.

[0010] Further, the vertical column and the cross beam are fixed by bolts. Bolt holes are provided at both ends of the cross beam. The bottom end of the vertical column is embedded in the bridge pier and is vertically arranged.

[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0012] By arranging two cross beams at both ends of the arc-shaped box girder, when hoisting, the hoisting rope is tied to the cross beam and the end of the arc-shaped box girder, so that the center of gravity of the arc-shaped box girder can be controlled at the middle position of the arc bend of the arc-shaped box girder, ensuring balance during the hoisting of the arc-shaped box girder and preventing tipping. At the same time, the cross beam can also serve as a balance fixing device during installation. If the width of the road is the same as that of the single-box arc-shaped box girder, the cross beam can directly serve as a long-term balance support device for the arc-shaped box girder, achieving multiple benefits. Description of the Drawings

[0013] Figure 1 is a schematic diagram of the end structure of the device of the utility model;

[0014] Figure 2 is a schematic diagram of the force analysis structure of the device of the utility model.

[0015] In the drawings, 1 - bridge pier, 2 - support flange, 3 - arc-shaped box girder, 4 - box girder end side plate, 5 - box girder end side plate bolt hole, 6 - cross beam, 7 - cross beam first end bolt hole, 8 - cross beam second end bolt hole, 9 - vertical column, 10 - support flange connection line, 11 - hoisting support connection line area, 12 - arc-shaped box girder center of gravity position. Detailed Embodiment

[0016] To make the purpose, technical solution and advantages of the utility model clearer, the following preferred embodiments are given with reference to the drawings for further detailed description of the utility model. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the utility model, and these aspects of the utility model can be implemented even without these specific details.

[0017] As Figure 1-2 shown, the anti-overturning device for single-piece steel box girder hoisting includes an arc-shaped box girder 3 and a cross beam 6. The cross beam 6 is arranged on the side edges at both ends of the arc-shaped box girder 3. The cross beam 6 is arranged on the outer side of the arc-shaped bending direction of the arc-shaped box girder 3. During hoisting, the hoisting rope is tied to the end of the arc-shaped box girder 3 and the cross beam 6. As Figure 2 shown, during hoisting, the length of the cross beam 6 is set according to the arc-shaped box girder center of gravity position 12, and then better control of the arc-shaped box girder center of gravity position 12 can be achieved. As Figure 2As shown, during installation, the connecting line of the two support flanges 2 (support flange connecting line 10) is not in a straight line with the centroid position 12 of the curved box girder, and the deviation is relatively large. If the curved box girder 3 is not fixed during installation, it is very likely to tip over. However, with the fixation of the crossbeam 6, the center of force coincides with the centroid position 12 of the curved box girder, maintaining balance, as Figure 2 shown in the hoisting support connecting line area 11.

[0018] In the embodiment of the present utility model, the crossbeam 6 and the curved box girder 3 are detachably arranged. When hoisting is required, the crossbeam 6 is installed at both ends of the curved box girder 3. The crossbeam 6 is set as a detachable structure, mainly to adjust the centroid by connecting two curved box girders 3 together when installing multiple curved box girders 3, and also to achieve balance, and then promptly remove the crossbeam 6.

[0019] In the embodiment of the present utility model, a box girder end side plate 4 is arranged on the outer side of the end of the curved box girder 3. Box girder end side plate bolt holes 5 are arranged on the box girder end side plate 4. The crossbeam 6 is connected and fixed to the box girder end side plate 4 through bolts. The box girder end side plate 4 is set according to the size and fixedly installed in the factory, and the bolt holes are drilled according to the set drawings.

[0020] In the embodiment of the present utility model, the above solution further includes a column 9. The lower end of the column 9 is connected to the top end of the pier 1, and the crossbeam 6 is connected to the top end of the column 9. The column 9 and the crossbeam 6 are fixed by bolts. Bolt holes are arranged at both ends of the crossbeam 6. The bottom end of the column 9 is embedded in the pier 1 and is vertically arranged.

[0021] Two crossbeams are arranged at both ends. When hoisting, the hoisting ropes are tied to the crossbeams and the ends of the curved box girder, which can control the centroid of the curved box girder at the middle position of the arc bend of the curved box girder, so as to keep the curved box girder balanced during hoisting and prevent tipping. At the same time, the crossbeam can also be used as a balance fixing device during installation. If the road width is that of a single-box curved box girder, the crossbeam can directly be used as a long-term balance support device for the curved box girder, achieving multiple benefits.

[0022] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. Anti-overturning device for hoisting single-piece steel box girder, characterized in that: It includes an arc-shaped box girder (3) and cross beams (6). The cross beams (6) are arranged on the two side edges at the ends of the arc-shaped box girder (3), and the cross beams (6) are arranged on the outer side in the arc bending direction of the arc-shaped box girder (3). During hoisting, the hoisting ropes are tied to the ends of the arc-shaped box girder (3) and the cross beams (6).

2. The anti-overturning device for hoisting a single-piece steel box girder according to claim 1, wherein: The cross beams (6) are detachably arranged with the arc-shaped box girder (3). When hoisting is required, the cross beams (6) are installed at the two ends of the arc-shaped box girder (3).

3. The anti-overturning device for hoisting a single-piece steel box girder according to claim 1, characterized in that: Box girder end side plates (4) are arranged on the outer sides of the ends of the arc-shaped box girder (3). Box girder end side plate bolt holes (5) are arranged on the box girder end side plates (4). The cross beams (6) are connected and fixed to the box girder end side plates (4) by bolts.

4. The anti-overturning device for hoisting a single-piece steel box girder according to claim 1, wherein: It also includes columns (9). The lower ends of the columns (9) are connected to the tops of the bridge piers (1), and the cross beams (6) are connected to the tops of the columns (9).

5. The anti-overturning device for hoisting a single-piece steel box girder according to claim 4, characterized in that: The columns (9) and the cross beams (6) are fixed by bolts. Bolt holes are arranged at both ends of the cross beams (6). The bottom ends of the columns (9) are embedded in the bridge piers (1) and are arranged vertically.

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