Device for preventing steel box girder of arc-shaped lane from overturning

Abstract

The utility model provides a device for preventing an arc-shaped lane steel box girder from overturning, which belongs to the technical field of lane steel box girder overturning prevention and comprises a plurality of arc-shaped box girders, the arc directions of the arc-shaped box girders are the same, and a gravity center balancing device is arranged between the end parts of two adjacent arc-shaped box girders. The gravity center balancing devices are arranged at the end parts of the two or more arc-shaped box girders, so that the gravity center positions of the arc-shaped box girders are changed, and the gravity center balancing devices can connect the end parts of all the arc-shaped box girders into a whole, so that the centers of the arc-shaped box girders are always transferred to the middle position of a lane; meanwhile, due to the fact that the gravity center balancing device is horizontally arranged at the outer end, maintenance is very easy at ordinary times.

Description

Technical Field

[0001] The utility model relates to the technical field of preventing the overturning of lane steel box girders, in particular to an anti-overturning device for preventing the overturning of arc-shaped lane steel box girders. Background Technique

[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, their self-weight is relatively light, which is not conducive to the lateral anti-overturning of the structure. Especially during the hoisting process, the situation of overturning is likely to occur.

[0003] Chinese Patent No. CN213653170U discloses an anti-overturning structure applicable to small-radius curve steel box girders, including a pier body and a small-radius curve steel box girder; two groups of double supports are fixed on both sides of the top surface of the pier body; each group of double supports 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 pier body at the supports; 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 compression nut is screwed on the top surface of the backing plate of the anti-overturning tie rod. This device fixes the box girder to prevent overturning in the later stage, but during hoisting, since the center of the arc-shaped box girder is not on the connection line of the two supports, the situation of overturning is likely to occur. At the same time, after hoisting, the existing structure fixes each steel box girder at the position of the pier, which can only play a fixing role, but the center of gravity of the steel box girder is still in the suspended position on the side and cannot be on the connection line of the support piers, and the situation of overturning is still likely to occur in the later stage. Therefore, it is necessary to design an anti-overturning device for arc-shaped lane steel box girders that changes the center of gravity of the steel box girder. Content of the Utility Model

[0004] The purpose of the utility model is to provide an anti-overturning device for arc-shaped lane steel box girders to solve the existing technical problems.

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

[0006] An anti-overturning device for arc-shaped lane steel box girders includes a plurality of arc-shaped box girders, the arc-shaped directions of the plurality of arc-shaped box girders are the same, and a center-of-gravity balancing device is arranged between the ends of adjacent two arc-shaped box girders.

[0007] Furthermore, the center-of-gravity balancing device includes two box girder end side plates and a cross beam, the two box girder end side plates are respectively arranged on the adjacent sides of adjacent two arc-shaped box girders, and the cross beam is detachably arranged with the two box girder end side plates.

[0008] Furthermore, the box girder end side plate is integrally arranged with the end side of the arc-shaped box girder.

[0009] Furthermore, bolt holes are provided on the side plates at the ends of the box girder. At both ends of the cross beam, a first-end bolt hole and a second-end bolt hole of the cross beam are respectively provided. The first-end bolt hole and the second-end bolt hole of the cross beam are respectively threadedly connected and fixed to the bolt holes on the side plates at the ends of the box girder by bolts.

[0010] Furthermore, intermediate connecting square steel is provided at the middle bottom of several arc-shaped box girders, and the intermediate connecting square steel fixes several arc-shaped box girders into one body.

[0011] Furthermore, the gravity balance device further includes a column. When installing the first arc-shaped box girder, one end of the gravity balance device is arranged on the first arc-shaped box girder. The upper end of the column is connected to the bottom of the other end of the gravity balance device, and the bottom of the column is arranged on the pier.

[0012] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects:

[0013] By arranging a gravity balance device at the end positions of two or more arc-shaped box girders, the present utility model changes the gravity position of the arc-shaped box girders. Because the gravity balance device can connect all the ends of the arc-shaped box girders into a whole, the center of the arc-shaped box girders is shifted to the middle position of the lane, preventing the arc-shaped box girders on the lane from overturning. At the same time, since the gravity balance device is horizontally arranged at the outer end, the maintenance is very simple during normal times. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the end structure when hoisting a single box girder of the present utility model;

[0015] Figure 2 is a schematic diagram of the connection structure of two box girders of the present utility model;

[0016] Figure 3 is a schematic diagram of the end structure of the connection structure of two box girders of the present utility model;

[0017] Figure 4 is a schematic diagram of the end structure of the connection structure of three box girders of the present utility model;

[0018] Figure 5 is a schematic diagram of the end structure of the connection structure of four box girders of the present utility model.

[0019] In the drawings, 1 - pier, 2 - support flange, 3 - arc-shaped box girder, 4 - side plate at the end of the box girder, 5 - bolt hole on the side plate at the end of the box girder, 6 - cross beam, 7 - first-end bolt hole of the cross beam, 8 - second-end bolt hole of the cross beam, 9 - column, 10 - intermediate connecting square steel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the following preferred embodiments are given with reference to the accompanying drawings for a further detailed description of the present 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 present utility model, and these aspects of the present utility model can be implemented even without these specific details.

[0021] As Figures 1-5 shown, an anti-overturning device for a curved-lane steel box girder includes a plurality of curved box girders 3. The curved directions of the plurality of curved box girders 3 are the same, and a center-of-gravity balancing device is arranged between the ends of two adjacent curved box girders 3.

[0022] During installation, the connecting line of the two support flanges 2 is not in a straight line with the center-of-gravity position 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 cross beam 6, the center of the force coincides with the center-of-gravity position of the curved box girder, maintaining balance. Specifically, as Figure 2 shown, by connecting the middle positions of the two curved box girders 3 together, the center of gravity of the outward-curved box girder moves backward, and the one in the front moves forward, so that the center is at the middle position among the four support piers, preventing the curved box girder 3 from tipping over.

[0023] In the embodiment of the present utility model, the center-of-gravity balancing device includes two box-girder end side plates 4 and a cross beam 6. The two box-girder end side plates 4 are respectively arranged on the adjacent sides of two adjacent curved box girders 3, and the cross beam 6 is detachably arranged with the two box-girder end side plates 4. By connecting the box-girder end side plates 4 and the cross beam 6, it is more convenient for connection during hoisting, with higher efficiency, and there will be no tipping over during single hoisting.

[0024] In the embodiment of the present utility model, the box-girder end side plate 4 is integrally arranged with the end side of the curved box girder 3. Through the integral arrangement, it is more stable, and only one bolt needs to be installed once, making it more durable.

[0025] In the embodiment of the present utility model, box-girder end side plate bolt holes 5 are arranged on the box-girder end side plate 4. Cross-beam first-end bolt holes 7 and cross-beam second-end bolt holes 8 are respectively arranged at both ends of the cross beam 6. The cross-beam first-end bolt holes 7 and the cross-beam second-end bolt holes 8 are respectively threadedly connected and fixed to the box-girder end side plate bolt holes 5 by setting bolts. Nuts are set for fixation when the bolts are connected, and the corresponding number of nuts is set according to the stress of the box girder.

[0026] In the embodiment of the present utility model, an intermediate connecting square steel 10 is arranged at the middle bottom of several arc-shaped box girders 3, and the intermediate connecting square steel 10 fixes several arc-shaped box girders 3 into a whole. By arranging the intermediate connecting square steel 10, all the arc-shaped box girders 3 can be integrated into a whole, avoiding the situation of movement and achieving better acceptance effect.

[0027] In the embodiment of the present utility model, the gravity balance device further includes a column 9. When installing the first arc-shaped box girder 3, one end of the gravity balance device is arranged on the first arc-shaped box girder 3, the upper end of the column 9 is connected to the bottom of the other end of the gravity balance device, and the bottom of the column 9 is arranged on the pier 1. The column 9 is mainly provided for facilitating the installation of the first box girder and can be directly removed after installation and is not needed later.

[0028] A gravity balance device is arranged at the end position of the arc-shaped box girder to change the gravity position of the arc-shaped box girder. Since the gravity balance device can connect the ends of all the arc-shaped box girders into a whole, the center of the arc-shaped box girder tends to shift to the middle position of the lane, preventing the arc-shaped box girders on the lane from overturning.

[0029] 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 of this technology, 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 curved lane steel box girder, characterized in that: It includes several arc-shaped box girders (3), the arc directions of the several arc-shaped box girders (3) are the same, and a center-of-gravity balancing device is arranged between the ends of adjacent two arc-shaped box girders (3).

2. The anti-overturning device for the curved lane steel box girder according to claim 1, characterized in that: The center-of-gravity balancing device includes two box girder end side plates (4) and a cross beam (6). The two box girder end side plates (4) are respectively arranged on the adjacent sides of adjacent two arc-shaped box girders (3), and the cross beam (6) is detachably arranged with the two box girder end side plates (4).

3. The anti-overturning device for the steel box girder of the arc-shaped lane according to claim 2, characterized in that: The box girder end side plate (4) is integrally arranged with the end side of the arc-shaped box girder (3).

4. The anti-overturning device for the steel box girder of the arc-shaped lane according to claim 2, characterized in that: Box girder end side plate bolt holes (5) are arranged on the box girder end side plate (4). The two ends of the cross beam (6) are respectively provided with a cross beam first-end bolt hole (7) and a cross beam second-end bolt hole (8). The cross beam first-end bolt hole (7) and the cross beam second-end bolt hole (8) are respectively fixedly connected by bolts threaded with the box girder end side plate bolt holes (5).

5. The anti-overturning device for the steel box girder of the arc-shaped lane according to claim 1, wherein: An intermediate connecting square steel (10) is arranged at the middle bottom of the several arc-shaped box girders (3), and the intermediate connecting square steel (10) fixes the several arc-shaped box girders (3) into a whole.

6. The anti-overturning device for the steel box girder of the arc-shaped lane according to claim 2, characterized in that: The center-of-gravity balancing device further includes a column (9). When installing the first arc-shaped box girder (3), one end of the center-of-gravity balancing device is arranged on the first arc-shaped box girder (3), the upper end of the column (9) is connected to the bottom of the other end of the center-of-gravity balancing device, and the bottom of the column (9) is arranged on the bridge pier (1).

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