A steel box bridge pushing device

Abstract

The utility model belongs to the field of incremental launching method construction technology of bridge engineering, disclose a kind of incremental launching equipment of steel box bridge, including assembling support, assembling support includes two round tubular columns and a double H section steel beam, double H section steel beam is installed on the one end of round tubular column;It further includes bridge mover, and is equipped with jacking cylinder top cover on bridge mover, and is equipped with the four limit blocks of four symmetrical arrangements on jacking cylinder top cover, and is equipped with incremental launching pad beam on four limit blocks, and jacking cylinder top cover is contacted with incremental launching pad beam single point through four limit blocks, and the one end of round tubular column away from double H section steel beam has integrally formed fixing ring, and several first fixed holes are opened in fixing ring, and several first fixed holes are equidistantly arranged along the axial direction of fixing ring, and round tubular column is fixed on the embedded part on the outside concrete through fixing ring, first fixed hole.The utility model not only can improve the incremental launching efficiency of large-span steel beam bridge, reduce construction difficulty, but also can reduce safety risk and cost.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering jacking construction technology, and in particular to a jacking device for steel box girder bridges. Background Technology

[0002] Steel box girder bridge jacking equipment refers to a set of specialized mechanical devices used in bridge construction to gradually push and slide prefabricated steel box girder segments forward along the bridge axis until they are installed in place. Its core function is to achieve safe, precise, and efficient installation of steel box girders in large-span or complex environments.

[0003] In the existing jacking construction process, the jacking platform needs to be erected and the steel box girder pre-assembled on the open space of the bridge abutment before jacking. Assembling the steel box girder requires a large number of temporary supports. During the jacking process, pad beams also need to be designed to assist in completing the four steps of lifting, translating, lowering and returning the jacking device in a continuous cycle. However, the above-mentioned jacking process is complicated, requires a large amount of materials, consumes a lot of money and has a slow construction progress. Therefore, we propose a jacking device for steel box girder bridges. Utility Model Content

[0004] In view of the problems of the existing jacking process, such as complicated construction steps, large material requirements, high capital consumption, and slow construction progress, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a jacking device for steel box girder bridges. The purpose is to improve the jacking efficiency of large-span steel girder bridges and reduce construction difficulty, as well as reduce safety risks and costs through bridge jacking construction.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A jacking device for a steel box girder bridge includes an assembly support, which comprises two circular tube columns and a double H-beam, wherein the double H-beam is installed on one end of the circular tube columns.

[0008] It also includes a bridge mover, which is equipped with a lifting cylinder top cover. The lifting cylinder top cover is equipped with four limiting blocks arranged symmetrically around its perimeter. Each of the four limiting blocks is equipped with a pushing pad beam. The lifting cylinder top cover makes single-point contact with the pushing pad beam through the four limiting blocks.

[0009] As a technical solution for the jacking device of the steel box girder bridge described in this utility model, the end of the circular tube column away from the double H-shaped steel beam has an integrally formed fixing ring. The fixing ring has a plurality of first fixing holes, and the plurality of first fixing holes are equidistantly arranged along the axial direction of the fixing ring. The circular tube column is fixed to the embedded part on the external concrete through the fixing ring and the first fixing holes.

[0010] As a technical solution for the jacking device of the steel box girder described in this utility model, two sets of first reinforcing ribs are welded and installed on the web of the double H-shaped steel beam, and the two sets of first reinforcing ribs are symmetrically arranged.

[0011] As a technical solution for the jacking device of the steel box girder bridge described in this utility model, the bridge mover is equipped with four baffles, each of which has a second fixing hole. The bridge mover is fixed to the embedded part on the external concrete through the baffles and the second fixing holes.

[0012] As a technical solution for the jacking device of the steel box girder bridge described in this utility model, the limiting block is made of 40Cr alloy steel casting, and the height of the limiting block is 1.2-1.5 times the thickness of the top cover of the lifting cylinder.

[0013] As a technical solution for the jacking device of the steel box girder described in this utility model, the jacking pad beam is made of two I-beams spliced ​​together.

[0014] As a technical solution for the jacking device of the steel box girder described in this utility model, a plurality of second reinforcing ribs are welded and installed on the web of the jacking pad beam, and the plurality of second reinforcing ribs are equidistantly arranged along the length direction of the jacking pad beam.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] 1. This utility model achieves stable support and efficient jacking of steel box girders through the combined design of the assembly bracket and the bridge mover. The first reinforcing rib of the double-span H-shaped steel beam and the I-beam splicing structure of the jacking pad beam enhance the overall deformation resistance. At the same time, the single-point contact design of the limiting block optimizes the force distribution and reduces local stress concentration.

[0017] 2. This utility model simplifies the installation process and shortens the construction cycle by pre-embedded connection of the fixing ring and fixing of the bridge mover baffle. At the same time, the use of 40Cr alloy steel for the limiting block and the equidistant arrangement of the second reinforcing ribs can improve the wear resistance and fatigue resistance of key components and extend the service life of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the assembly support structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the assembly and connection structure of the bridge mover and the limiting block of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Circular tube column; 101. Fixing ring; 102. First fixing hole; 2. Double H-beam; 201. First reinforcing rib; 3. Bridge mover; 301. Lifting cylinder top cover; 302. Baffle; 303. Second fixing hole; 4. Limiting block; 5. Pushing pad beam; 501. Second reinforcing rib. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1-3 A jacking device for a steel box girder bridge is provided. This jacking device for a steel box girder bridge includes an assembly support, which includes two round tube columns 1 and a double H-beam 2. The double H-beam 2 is installed on one end of the round tube columns 1. In application, the design of the assembly support of the round tube columns 1 and the double H-beam 2 can facilitate quick disassembly and reuse, thereby reducing construction costs.

[0026] It also includes a bridge mover 3, which is equipped with a lifting cylinder top cover 301. The lifting cylinder top cover 301 is equipped with four limiting blocks 4 symmetrically arranged around its perimeter. The four limiting blocks 4 are equipped with a pushing pad beam 5. The lifting cylinder top cover 301 makes single-point contact with the pushing pad beam 5 through the four limiting blocks 4. In application, the lifting cylinder top cover 301 and the pushing pad beam 5 make single-point contact through the four limiting blocks 4, which can adaptively adjust the pressure distribution on the contact surface and avoid the problem of uneven stress caused by multiple support points.

[0027] Reference Figure 1 and Figure 2The end of the circular tube column 1 away from the double H-beam 2 has an integrally formed fixing ring 101. The fixing ring 101 has several first fixing holes 102, which are equidistantly arranged along the axial direction of the fixing ring 101. The circular tube column 1 is fixed to the embedded parts on the external concrete through the fixing ring 101 and the first fixing holes 102. In application, the concentrated load of the circular tube column 1 on the concrete foundation is distributed through the multi-hole embedded connection to prevent local crushing; at the same time, it allows for fine height adjustment to adapt to different construction terrains.

[0028] Reference Figure 1 and Figure 2 Two sets of first reinforcing ribs 201 are welded and installed on the web of the double-section H-beam 2, and the two sets of first reinforcing ribs 201 are symmetrically arranged, which significantly improves the bending stiffness of the double-section H-beam 2 and prevents bending deformation during large-span assembly.

[0029] Reference Figure 1 and Figure 3 The bridge mover 3 is equipped with four baffles 302, each baffle 302 having a second fixing hole 303. The bridge mover 3 is fixed to the embedded part on the external concrete through the baffles 302 and the second fixing holes 303. In application, the second fixing holes 303 on the baffles 302 form a planar constraint, suppressing the horizontal vibration of the bridge mover 3 during the jacking process and reducing the vibration amplitude.

[0030] Reference Figure 1 and Figure 3 The limiting block 4 is made of 40Cr alloy steel casting, and the height of the limiting block 4 is 1.2-1.5 times the thickness of the lifting cylinder top cover 301, so as to ensure compressive stability and avoid material redundancy.

[0031] Reference Figure 1 and Figure 3 The jacking beam 5 is made of two I-beams spliced ​​together to greatly enhance torsional resistance.

[0032] Reference Figure 1 and Figure 3 Several second reinforcing ribs 501 are welded and installed on the web of the jacking pad beam 5, and the several second reinforcing ribs 501 are equidistantly arranged along the length direction of the jacking pad beam 5, so as to convert the concentrated load into a uniformly distributed load.

[0033] The working principle of this utility model is as follows: by pouring concrete foundation and pre-embedding fixing parts, the positioning and installation of the assembly bracket and bridge mover 3 are completed. Then, the steel box girder is assembled in sections on the assembly bracket. The height of the beam is adjusted by the lifting cylinder of the bridge mover 3. At the same time, the thrust is transmitted through the single-point contact between the limiting block 4 and the jacking pad beam 5, and the beam is gradually pushed forward. After each section of jacking is completed, the above jacking operation is repeated. At the same time, the stress state of the limiting block 4 and the reinforcing rib is monitored in real time to ensure the durability of the equipment. This can improve the jacking efficiency of large-span steel beam bridges, reduce construction difficulty, and reduce safety risks and costs.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A jacking device for steel box girder bridges, characterized in that: The assembly bracket includes two round tube columns (1) and a double H-beam (2), which is installed on one end of the round tube columns (1). It also includes a bridge mover (3), which is provided with a lifting cylinder top cover (301). The lifting cylinder top cover (301) is provided with four limiting blocks (4) arranged symmetrically around the perimeter. The four limiting blocks (4) are provided with a pushing pad beam (5). The lifting cylinder top cover (301) is in single-point contact with the pushing pad beam (5) through the four limiting blocks (4).

2. The jacking device for steel box girder bridges according to claim 1, characterized in that: The cylindrical column (1) has an integrally formed fixing ring (101) at one end away from the double H-shaped steel beam (2). The fixing ring (101) has a plurality of first fixing holes (102) and the plurality of first fixing holes (102) are equidistantly arranged along the axial direction of the fixing ring (101). The cylindrical column (1) is fixed to the embedded part on the external concrete through the fixing ring (101) and the first fixing holes (102).

3. The jacking device for steel box girder bridges according to claim 1, characterized in that: The web of the double H-beam (2) is welded with two sets of first reinforcing ribs (201), and the two sets of first reinforcing ribs (201) are symmetrically arranged.

4. The jacking device for steel box girder bridges according to claim 1, characterized in that: The bridge mover (3) is equipped with four baffles (302), each of which has a second fixing hole (303). The bridge mover (3) is fixed to the embedded part on the external concrete through the baffles (302) and the second fixing hole (303).

5. The jacking device for steel box girder bridges according to claim 1, characterized in that: The limiting block (4) is made of 40Cr alloy steel, and the height of the limiting block (4) is 1.2-1.5 times the thickness of the lifting cylinder top cover (301).

6. The jacking device for steel box girder bridges according to claim 1, characterized in that: The jacking pad beam (5) is made of two I-beams spliced ​​together.

7. The jacking device for steel box girder bridges according to claim 6, characterized in that: The web of the jacking pad beam (5) is welded with a number of second reinforcing ribs (501), and the number of second reinforcing ribs (501) are equidistantly arranged along the length direction of the jacking pad beam (5).

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