Auxiliary supporting system for hoisting steel box girder

Abstract

The utility model discloses a steel box girder hoisting auxiliary supporting system, belongs to the technical field of steel box girder hoisting, and solves the problems of high construction cost and low construction efficiency caused by arrangement of temporary buttresses in the existing steel box girder hoisting auxiliary process. The device comprises hoop structures arranged on two pier columns respectively, connecting plate assemblies are fixed to the two adjacent side faces of the two hoop structures, a temporary steel beam is connected between the two connecting plate assemblies through bolts, and a plurality of adjusting pipes are arranged at the top of the temporary steel beam. The temporary steel beam is directly fixed to the pier column through the two hoop structures, the stress structure of the temporary steel beam can be used for transmitting the borne pressure to the permanent pier column, and the temporary steel beam is suitable for projects with poor foundation bearing capacity and difficult construction conditions, such as bridge projects on river channels and expressway projects in mountainous areas, has high practicability and is suitable for popularization and application. Dependence of a traditional temporary buttress on foundation treatment is omitted, the construction cost is remarkably reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel box girder hoisting technology, and specifically to an auxiliary support system for steel box girder hoisting. Background Technology

[0002] With the development of modern technology, most long-span bridges in bridge engineering adopt steel plate box girders as the main load-bearing structure. The erection of steel box girders is a key part of the overall bridge construction process, especially the auxiliary support system during the erection of steel box girders.

[0003] In the existing auxiliary support system for steel box girder erection, most temporary supports in the form of lattice brackets are set between bridge piers as a support system during the hoisting and welding of steel box girders. The lattice bracket temporary supports have high requirements for the bearing capacity of the foundation. However, since most of the bridges are located in river channels or have rugged terrain, the soil at the bottom of the river is subject to long-term erosion by water flow, and the bearing capacity is difficult to meet the requirements of the temporary support foundation. Additional foundation treatment measures are required, including site leveling, local hardening if necessary, and subsequent transportation, hoisting, and dismantling of the temporary supports, which consume a lot of manpower, materials, and mechanical resources.

[0004] In summary, in the existing temporary support system for steel box girder erection, using temporary supports to assist in the hoisting of steel box girders has the problems of high construction costs and low construction efficiency. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides an auxiliary support system for steel box girder hoisting, which solves the problems of high construction cost and low construction efficiency associated with setting up temporary supports during the existing steel box girder hoisting auxiliary process.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A steel box girder hoisting auxiliary support system is provided, including clamp structures respectively installed on two piers, connecting plate assemblies fixed on two adjacent sides of the two clamp structures, a temporary steel beam bolted between the two connecting plate assemblies, and multiple adjusting pipes installed on the top of the temporary steel beam. The top surfaces of the multiple adjusting pipes are all located on the same horizontal plane and are all used to support and fix the bottom surface of the steel box girder.

[0008] In this scheme, the temporary steel beam is directly fixed to the pier through two clamp structures. The stress can be transferred to the permanent pier by utilizing its load-bearing structure. It is suitable for projects with poor foundation bearing capacity and difficult construction conditions, such as bridge projects over rivers and highway projects in mountainous areas. It has great practicality, eliminates the dependence on foundation treatment of traditional temporary piers, significantly reduces construction costs and improves construction efficiency. At the same time, the horizontal design of the top surface of multiple adjustment pipes ensures the stability of the steel box girder support.

[0009] Furthermore, each clamp structure includes side steel plates fixed around the pier, and a cover plate is fixed to the top of each side steel plate. The side steel plates wrap around the pier, enhancing the integrity and deformation resistance of the clamp structure.

[0010] Furthermore, the inner surface of each side steel plate is welded to multiple clamping components pre-embedded in the pier column. The welding of the pre-embedded clamping components to the side steel plates achieves a permanent connection between the clamping structure and the pier column, avoiding damage to the pier column structure due to drilling later, while improving load-bearing capacity and long-term stability.

[0011] Furthermore, each clamp component is a Z-shaped steel bar with one end hooked to the internal steel reinforcement cage of the pier column. The Z-shaped steel bar hooks to the steel reinforcement cage of the pier column for easy fixing.

[0012] Furthermore, each cover plate is equipped with a pouring hole. The pouring hole facilitates the pouring of the reinforcing cage inside the pier column.

[0013] Furthermore, each connecting plate assembly includes two connecting plates welded to the side steel plates, each with multiple threaded holes vertically formed. This threaded hole design provides multiple bolt connection points, accommodating the installation needs of temporary steel beams at different heights and enhancing system flexibility and construction tolerance.

[0014] Furthermore, the temporary steel beam is an I-beam structure, with both ends of the web plate of the temporary steel beam bolted to the two connecting plates of two connecting plate assemblies. The I-beam structure utilizes the shear resistance of the web plate and the bending resistance of the flange plate to optimize the stress performance of the temporary steel beam; the bolted connection between the web plate and the connecting plates simplifies the disassembly and assembly process and facilitates reuse.

[0015] Furthermore, the width between the two connecting plates of the two connecting plate assemblies is matched with the web thickness of the temporary steel beam. This matching of the spacing between the two connecting plates with the web thickness ensures precise alignment during installation and reduces construction errors.

[0016] Furthermore, the height of each connecting plate is less than the web height of the temporary steel beam. This avoids interference problems caused by the connecting plate exceeding the web area, while ensuring that the bolt stress area is concentrated on the effective cross section of the web, thus improving connection reliability.

[0017] Furthermore, multiple adjusting pipes are evenly distributed on both sides of the flange of the temporary steel beam, and the bottom surface of each adjusting pipe is bolted to the flange of the temporary steel beam. The even distribution of adjusting pipes on both sides of the flange of the I-beam balances the load distribution of the steel box girder and avoids excessive force on one side, which could cause the temporary steel beam to tilt.

[0018] This utility model discloses an auxiliary support system for hoisting steel box girders, the advantages of which are:

[0019] The temporary steel beam of this invention is directly fixed to the pier through two clamp structures. It can transfer the pressure to the permanent pier by utilizing its load-bearing structure. It is suitable for projects with poor foundation bearing capacity and difficult construction conditions, such as bridge projects on rivers and highway projects in mountainous areas. It has great practicality, eliminates the dependence on foundation treatment of traditional temporary piers, significantly reduces construction costs and improves construction efficiency. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the auxiliary support system for hoisting steel box girders;

[0021] Figure 2 A partially enlarged view of the auxiliary support system for hoisting steel box girders;

[0022] Figure 3 This is a cross-sectional view of the connecting plate assembly;

[0023] Figure 4 This is a structural schematic diagram of the clamp component;

[0024] The components include: 1. Clamping structure; 11. Side steel plate; 12. Clamping component; 13. Cover plate; 2. Connecting plate assembly; 21. Connecting plate; 22. Elevation bolt; 3. Temporary steel beam; 4. Adjusting pipe. Detailed Implementation

[0025] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0026] refer to Figure 1 and Figure 2 A steel box girder hoisting auxiliary support system includes two clamp structures 1, two connecting plate assemblies 2, temporary steel beams 3, and multiple adjusting pipes 4.

[0027] Two clamping structures 1 are respectively installed on the two piers. The height of the clamping structures 1 can be adjusted according to the actual situation to support the temporary steel beam 3.

[0028] Specifically, each clamp structure 1 includes side steel plates 11 fixed around the pier column. The side steel plates 11 are rolled and welded around the pier column to enhance the integrity and deformation resistance of the clamp structure 1. Preferably, the inner surface of each side steel plate 11 is welded to multiple clamp components 12 pre-embedded in the pier column.

[0029] In this embodiment, reference Figure 4 The clamping member 12 is a Z-shaped steel bar, with one end welded to the inside of the side steel plate 11 and the other end hooked to the transverse steel bar of the pier column. The adjacent clamping members 12 are in opposite directions, that is, one hooks downward to the transverse steel bar of the permanent pier column and the other hooks upward to the transverse steel bar of the permanent pier column to increase friction and form a stable clamping structure 1.

[0030] Each side steel plate 11 is fixed to the top of a cover plate 13, and each cover plate 13 is provided with a pouring hole. The pouring hole position must be larger than the width and length of the support at the top of the pier column.

[0031] The two connecting plate assemblies 2 are respectively fixed on two adjacent sides of the two clamp structures 1.

[0032] Specifically, each connecting plate assembly 2 includes two connecting plates 21 welded to the side steel plate 11, and both connecting plates 21 have multiple threaded holes vertically formed on them. The length of the connecting plate 21 shall not exceed the length of the clamping structure 1, and the number of threaded holes can be adjusted according to the actual stress requirements.

[0033] In this embodiment, after the clamping structures 1 on the two end piers are formed, connecting plates 21 are welded to the opposite side steel plates 11 of the clamping structures 1 at both ends. Each clamping structure 1 is welded with two connecting plates 21. The positions of the connecting plates 21 are symmetrical, and the distance between them should be close to, but not less than, the web thickness of the temporary steel beam 3. Subsequent dismantling only requires cutting the connecting plates 21 off from the side steel plates 11. Preferably, the width between the two connecting plates 21 of the two connecting plate assemblies 2 is clearance-fitted with the web thickness of the temporary steel beam 3, and the height of each connecting plate 21 is less than the web height of the temporary steel beam 3.

[0034] refer to Figure 3 The temporary steel beam 3 is an I-beam structure, with both ends of its web plate bolted to the two connecting plates 21 of the two connecting plate assemblies 2. The I-beam structure utilizes the shear resistance of the web plate and the bending resistance of the flange plate to optimize the stress performance of the temporary steel beam 3; the bolted connection between the web plate and the connecting plates 21 simplifies the disassembly and assembly process and facilitates reuse.

[0035] Multiple regulating pipes 4 are evenly distributed on both sides of the wing plate of the temporary steel beam 3, and the bottom surface of each regulating pipe 4 is bolted to the wing plate of the temporary steel beam 3.

[0036] In this implementation, the regulating pipe 4 can be a circular regulating pipe 4, which is cylindrical in nature. The upper and lower surfaces are annular planes that are widened from the side. The upper annular plane is fixedly connected to the steel box girder by welding. The connection between the upper annular plane and the temporary steel beam 3 is made by using elevation bolts 22 that penetrate the upper flange of the temporary steel beam 3 and are fixed with nuts. Alternatively, other regulating devices can be used instead.

[0037] In summary, the method of using one type of auxiliary support system for steel box girder hoisting in this solution is as follows:

[0038] Firstly, the installation of the clamping structure 1: During the construction of the bottom of the piers at both ends of the bridge, the top part is reserved as the clamping part. The height of the clamping structure 1 is equal to the reserved position at the top of the pier. The sum of the height of the clamping structure 1 and the height of the bottom of the pier shall not exceed the design height of the pier. The specific reserved height on site can be adjusted according to the actual conditions. The clamping component 12 is embedded in the steel bar reserved at the top of the pier. The side steel plate 11 is formed by rolling and welding steel plates. The top of the side steel plate 11 is covered with a steel cover plate 13. The clamping component 12, the side steel plate 11, and the steel cover plate 13 are welded and fixed to form the clamping structure 1.

[0039] Secondly, the installation of the connection: Two connecting plates 21 are welded to the opposite positions of the side steel plates 11 at both ends of the pier. A certain number of threaded holes are reserved in the connecting plates 21. The temporary steel beam 3 is hoisted to a suitable position by machinery. Workers use tools on the operating platform to insert the temporary steel beam 3 into the connecting plates 21. The elevation bolts 22 are used to penetrate the temporary steel beam 3 and the two connecting plates 21 and are fixed by nuts. After the temporary steel beam 3 is fixed at both ends, it is slowly removed from the hoisting auxiliary machinery to ensure on-site safety.

[0040] Third, the lower contact surface of the adjusting pipe 4 is connected by the elevation bolt 22 through the wing plate of the temporary steel beam 3 and fixed with nuts. Before the steel box girder is hoisted, the upper contact surface is cut at the top of the adjusting pipe 4 to ensure that the top of all adjusting pipes 4 are on the same horizontal plane before the steel box girder is hoisted. During the hoisting, the top of the adjusting pipe 4 is cut appropriately according to the design elevation to ensure that the steel box girder reaches the design elevation requirements. After the adjustment is completed, the steel box girder is welded and fixed to achieve precise construction.

[0041] The temporary support system for steel box girder erection can transfer the pressure to the permanent piers by utilizing its load-bearing structure. It is suitable for projects with poor foundation bearing capacity and difficult construction conditions, such as bridge projects over rivers and highway projects in mountainous areas. It has great practicality. The installation and dismantling of the auxiliary support system is convenient and can be carried out quickly, which can improve construction efficiency, save labor and machine costs, and has good economic benefits.

[0042] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A steel box girder hoisting auxiliary support system, characterized by, It includes clamp structures (1) respectively set on two piers, and connecting plate assemblies (2) are fixed on two adjacent sides of the two clamp structures (1). A temporary steel beam (3) is bolted between the two connecting plate assemblies (2). Multiple adjusting pipes (4) are set on the top of the temporary steel beam (3). The top surfaces of the multiple adjusting pipes (4) are all located on the same horizontal plane and are all used to support and fix the bottom surface of the steel box girder.

2. The steel box girder hoisting auxiliary support system according to claim 1, characterized in that, Each of the clamp structures (1) includes side steel plates (11) fixed around the pier, and a cover plate (13) is fixed to the top of each side steel plate (11).

3. The steel box girder hoisting auxiliary support system according to claim 2, characterized in that, The inner surface of each of the side steel plates (11) is welded to a plurality of clamping members (12) pre-embedded in the pier column.

4. The steel box girder hoisting auxiliary support system according to claim 3, characterized in that, Each clamp component (12) is a Z-shaped steel bar with one end hooked onto the steel cage inside the pier column.

5. The steel box girder hoisting auxiliary support system according to claim 2, characterized in that, Each of the cover plates (13) is provided with a casting hole.

6. The steel box girder hoisting auxiliary support system according to claim 2, characterized in that, Each of the connecting plate assemblies (2) includes two connecting plates (21) welded to the side steel plate (11), and both connecting plates (21) have multiple threaded holes vertically opened on them.

7. The steel box girder hoisting auxiliary support system according to claim 2, characterized in that, The temporary steel beam (3) is an I-beam structure, and the two ends of the web of the temporary steel beam (3) are bolted to the two connecting plates (21) of the two connecting plate assemblies (2).

8. The steel box girder hoisting auxiliary support system according to claim 7, characterized in that, The width between the two connecting plates (21) of the two connecting plate assemblies (2) is clearance-fitted with the web thickness of the temporary steel beam (3).

9. The steel box girder hoisting auxiliary support system according to claim 7, characterized in that, The height of each connecting plate (21) is less than the web height of the temporary steel beam (3).

10. The steel box girder hoisting auxiliary support system according to claim 7, characterized in that, Multiple regulating pipes (4) are evenly distributed on both sides of the wing plate of the temporary steel beam (3), and the bottom surface of each regulating pipe (4) is bolted to the wing plate of the temporary steel beam (3).

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