A turning-over device for a large steel bridge deck

Abstract

The application relates to the technical field of bridge deck panel hoisting, and particularly discloses a turning-over device for large steel bridge deck panels, which comprises a tumbling tool and a turning-over lifting lug. The tumbling tool and the turning-over lifting lug are respectively arranged on the two sides of the bridge deck panel block through bolts. The tumbling tool is provided with a circular arc edge and is connected with the hole group of the upper chord web plate of the cross truss of the bridge deck panel block, and is used for supporting the bridge deck panel block. The turning-over lifting lug is connected with the hole group of the upper chord web plate of the cross truss on the other side of the bridge deck panel block, and is used for being connected with hoisting equipment. During hoisting, the tumbling tool is in contact with the ground, the bridge deck panel block rotates along the circular arc edge of the tumbling tool to complete turning-over, and the tumbling tool disperses the pressure generated by the gravity of the bridge deck panel on the tumbling tool and the upper chord web plate of the cross truss of the bridge deck panel block during turning-over, so that the deformation and damage of the bridge deck panel block caused by large pressure are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of bridge deck hoisting technology, specifically a large steel bridge deck turning device. Background Technology

[0002] Steel structure bridges are widely used in medium- and long-span bridges due to their lightweight, high material strength, and convenient construction. Steel truss bridges, composed of truss members, offer significant advantages over box girders, saving steel and being lighter. Employing an upper-bearing plate truss composite structure, steel truss bridges are commonly used as stiffening girders in suspension bridges. They primarily consist of main trusses, orthotropic bridge decks, main transverse trusses, and lower horizontal bracing. The main transverse trusses are located between two main trusses and are arranged longitudinally. Due to the large size of steel truss bridges and limitations in transportation and installation capacity, steel truss bridges utilize a construction method that involves manufacturing, transporting, assembling on-site, and hoisting large sections of individual members.

[0003] Orthotropic bridge deck panels are divided into sections based on the length of the lifting segments, transportation conditions, and steel specifications. These panels are fabricated in the processing plant as approximately 3-meter-wide units. After being transported to the construction site, they are laterally widened and then assembled with the upper chord of the transverse truss, secondary beams, and small longitudinal beams to form bridge deck blocks. During the assembly of these bridge deck blocks, to ensure the welding quality between the longitudinal and transverse beams and the bridge deck, reduce construction difficulty, and improve production efficiency, the bridge deck blocks are assembled using an inverted method. After assembly, the entire block needs to be flipped over for use in the assembly of larger segments. Typically, a crane or other lifting equipment is used to lift one side of the bridge deck block and flip it over. Lifting lugs are installed on the bridge deck block in conjunction with the crane. During the flipping process, the bottom of the bridge deck block contacts the ground, bearing significant pressure and easily causing deformation and damage. Furthermore, the bridge deck block needs to be lifted into the air and moved to a predetermined position for flipping, posing construction safety risks.

[0004] In the prior art, patent CN112589358A discloses a large-scale welded H-beam turning device, including a welding bracket. A welded H-beam is movably connected to the top of the welding bracket. A lifting device is installed above the welding bracket, and the bottom of the lifting device is fixedly connected to the top of the welded H-beam. An H-beam turning jig is movably connected to one side of the lower flange of the welded H-beam. A slot is provided on one side of the H-beam turning jig. The outer surface of the lower flange of the welded H-beam engages with the inner surface of the slot. A tightening bolt is threaded to the top of the H-beam turning jig. The bottom end of the tightening bolt penetrates the H-beam turning jig and extends into the slot. The bottom end of the tightening bolt contacts the top of the lower flange of the welded H-beam. This device prevents instability during the welding and turning process of the welded H-beam, protects the welding bracket from being damaged by impact, and prevents the welded H-beam from falling and deforming. Unlike H-beam steel structures, bridge deck panels do not have lower flanges that mate with the slots of the flipping frame. Therefore, the flipping device is not suitable for flipping bridge deck panels, and a flipping device that is suitable for bridge deck panels needs to be designed. Utility Model Content

[0005] To address the shortcomings of existing technologies, the technical problem solved by this utility model is to provide a turning device for large steel bridge decks, thereby solving the problem of easy deformation during the turning process of existing steel truss bridge decks.

[0006] To solve the above problems, the technical solution adopted by this utility model is: a turning device for a large steel bridge deck, including a turning fixture and a turning lug. The turning fixture and the turning lug are respectively installed on both sides of the bridge deck block by bolts. The turning fixture has an arc edge and is connected to the hole group of the web plate of the upper chord of the transverse truss of the bridge deck block for supporting the bridge deck block. The turning lug is connected to the hole group of the web plate of the upper chord of the transverse truss on the other side of the bridge deck block for connecting with the lifting equipment. The turning fixture includes a side plate, a top plate and structural steel. The side plate has an arc edge, there are two side plates, and multiple structural steel are welded between the two side plates. The top plate is welded to the side plate on the side opposite to the arc edge, and the top plate has mounting holes corresponding to the bridge deck block.

[0007] Furthermore, the turning lug includes a pull plate and a connecting plate, which are welded together. The pull plate has lifting holes, and the connecting plate has mounting holes corresponding to the bridge deck panels.

[0008] Furthermore, the steel section is an I-beam or a channel steel.

[0009] Furthermore, the side plate is also provided with an operating hole near the top plate.

[0010] Furthermore, the arc angle of the arc edge is greater than or equal to 180°.

[0011] The beneficial effects of this solution are as follows: Compared with the prior art, the large steel bridge deck turning device of this utility model, in addition to having turning lugs connected to the hoisting equipment, also has a turning fixture for supporting the bridge deck panel. The turning lugs and the turning fixture are installed on the bridge deck panel using bolts and nuts. During hoisting, the turning fixture contacts the ground, and the bridge deck panel rotates along the arc edge of the turning fixture to complete the turning. During the turning process, the turning fixture disperses the pressure generated by the weight of the bridge deck panel itself to the web of the upper chord of the transverse truss of the turning fixture and the bridge deck panel, effectively avoiding deformation and damage to the bridge deck panel due to excessive pressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the tumbling fixture of this utility model; Figure 2 This is a schematic diagram of the turning and lifting lugs of this utility model; Figure 3 This is a schematic diagram of the installation of this utility model; Figure 4This is a front sectional view of the tumbling fixture of this utility model; In the diagram: 1-Tumbling fixture, 2-Tumbling lifting lug, 3-Bridge panel block, 11-Circular edge, 12-Side plate, 13-Top plate, 14-Structure steel, 15-Operating hole, 21-Pull plate, 22-Connecting plate, 23-Lifting hole, 31-Horizontal truss. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Implementation, for example, attached Figures 1 to 4 As shown: A turning device for a large steel bridge deck includes a turning fixture 1 and a turning lug 2. The turning fixture 1 and the turning lug 2 are respectively installed on both sides of the bridge deck panel 3 by bolts. The turning fixture 1 has a rounded edge 11. The turning fixture 1 is connected to the hole group of the upper chord web of the transverse truss 31 of the bridge deck panel 3 for supporting the bridge deck panel 3. The turning lug 2 is connected to the hole group of the upper chord web of the transverse truss 31 on the other side of the bridge deck panel 3 for connecting to the hoisting equipment. The turning fixture 1 includes a side plate 12, a top plate 13 and a steel section 14. The side plate 12 has a rounded edge 11. There are two side plates 12, and multiple steel sections 14 are welded between the two side plates 12. The top plate 13 is welded to the side plate 12 on the side opposite to the arc edge 11. The top plate 13 is provided with mounting holes corresponding to the bridge deck panel 3 for installing the turning tool 1 on the bridge deck panel 3. The turning lifting lug 2 includes a pull plate 21 and a connecting plate 22. The pull plate 21 and the connecting plate 22 are welded together. The pull plate 21 is provided with a lifting hole 23 for connecting with the lifting equipment. The connecting plate 22 is provided with mounting holes corresponding to the bridge deck panel 3 for installing the turning lifting lug 2 on the bridge deck panel 3.

[0015] The steel section 14 is an I-beam or channel steel, which has good bending resistance and can improve the structural stability of the rolling fixture 1. The side plate 12 is also provided with an operating hole 15 near the top plate 13 for reaching in with a hand or fastening tools, facilitating bolt installation. The arc angle of the arc edge 11 is greater than or equal to 180°, ensuring effective support throughout the overturning process of the bridge deck panel 3. The top plate 13 is eccentrically positioned relative to the side plate 12, so that the height of the bridge deck panel 3 from the ground after overturning is greater than before overturning, preventing damage to protruding components on the bridge deck panel 3 during the overturning process. Figure 3 The component in the middle of bridge panel block 3 shown.

[0016] The specific implementation process is as follows: Two rolling fixtures 1 and two turning lugs 2 are symmetrically installed on both sides of the bridge deck panel 3 using bolts and nuts. The hoisting equipment is connected to the turning lugs 2. The hoisting equipment is started, and the bridge deck panel 3 rotates along the arc edge 11 of the rolling fixture 1 until it leaves the ground. At this point, the bridge deck panel 3 is vertical. After being hoisted to the predetermined position, it is lowered so that the arc edge 11 of the rolling fixture contacts the ground. The lowering continues, causing the bridge deck panel 3 to rotate along the arc edge 11 of the rolling fixture 1 until it is horizontal to the ground, thus completing the 180-degree rotation of the entire bridge deck panel 3. To prevent the bridge deck panel 3 from rotating in the predetermined direction... Rotating in the opposite direction allows for the placement of a stop block below the arc edge 11 of the flipping fixture in the opposite direction. During the hoisting and flipping process of the bridge panel 3, the flipping fixture 1 provides support, distributing the pressure generated by the weight of the bridge panel 3 to the flipping fixture 1 and the upper chord web of the transverse truss 31 of the bridge panel 3. As the bridge panel 3 rotates along the flipping fixture 1, the arc edge 11 of the flipping fixture 1 contacts the ground, preventing the bridge panel 3 from directly contacting the ground. This effectively avoids deformation and damage caused by excessive pressure on the bottom of the bridge panel 3, significantly reducing construction safety risks compared to existing aerial flipping methods.

[0017] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A turning device for large steel bridge decks, characterized in that: The system includes a tumbling fixture and a turning lug, which are bolted to both sides of the bridge deck panel. The tumbling fixture has a rounded edge and is connected to the holes in the web of the upper chord of the transverse truss of the bridge deck panel to support the bridge deck panel. The turning lug is connected to the holes in the web of the upper chord of the transverse truss on the other side of the bridge deck panel and is used to connect to the hoisting equipment. The tumbling fixture includes side plates, a top plate, and structural steel. There are two side plates with rounded edges, and multiple structural steel sections are welded between the two side plates. The top plate is welded to the side plate opposite to the rounded edge and has mounting holes corresponding to the bridge deck panel.

2. The large steel bridge deck turning device according to claim 1, characterized in that: The turning lug includes a pull plate and a connecting plate, which are welded together. The pull plate has lifting holes, and the connecting plate has mounting holes corresponding to the bridge deck panels.

3. The large steel bridge deck turning device according to claim 1, characterized in that: The steel section is either an I-beam or a channel steel.

4. The large steel bridge deck turning device according to claim 1, characterized in that: The side plate is also provided with an operating hole near the top plate.

5. The large steel bridge deck turning device according to claim 1, characterized in that: The arc angle of the arc edge is greater than or equal to 180°.

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