Steel box girder construction portal support device

Abstract

This utility model relates to the field of overpass construction technology and discloses a support device for a steel box girder overpass construction portal. The utility model includes: a support frame structure and a crossbeam structure. At least two support frame structures are provided, spaced apart along a first direction. The crossbeam structure is installed at the top of the support frame structure and supports the overpass. The support frame structure and the crossbeam structure form a portal for vehicle passage. This structure adds a temporary construction road, and by utilizing the support frame structure and crossbeam structure to form the portal, it ensures normal traffic flow without affecting the overpass construction. Compared to existing Bailey bridges, which have a large self-weight and require overall hoisting during installation, the support frame structure adopts a modular design. Combined with the crossbeam structure, the crossbeams can be installed in sections, facilitating rapid assembly and disassembly, improving construction efficiency, and reducing on-site operation difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of cross-line construction technology, specifically to a support device for a steel box girder cross-line construction portal. Background Technology

[0002] Currently, my country's transportation industry is developing rapidly, and the transportation network is becoming more diversified, as evidenced by the frequent construction of overpasses crossing railways, rivers, highways, and provincial roads. For overpasses with different construction conditions, corresponding load-bearing support construction technologies must be selected to meet the diverse needs of these bridges.

[0003] In the past, Bailey bridges and full-span scaffolding were commonly used to support the upper steel beams. However, Bailey bridges are heavy and require overall hoisting during installation. The hoisting process is subject to many influencing factors, posing significant safety risks. Dismantling them is also difficult and costly. Full-span scaffolding has a complex doorway support structure, making construction difficult, material costs high, and safety risks high. Utility Model Content

[0004] In view of this, this utility model provides a support device for the portal opening of a steel box girder crossing construction, to solve the problems of the previously used Bailey bridges and full-span scaffolding supporting the upper steel beams. However, Bailey bridges have a large self-weight, require overall hoisting during installation, have many influencing factors during hoisting, have high safety risks, and are difficult and costly to dismantle. Full-span scaffolding portal opening support structures are complex, difficult to construct, have high material costs, and high safety risks.

[0005] Firstly, this utility model provides a support device for the portal opening of a steel box girder overpass construction, comprising:

[0006] A support frame structure, wherein at least two support frame structures are provided, and the at least two support frame structures are spaced apart along a first direction;

[0007] A crossbeam structure is installed at the top of the support frame structure and is used to support the overpass.

[0008] The support frame structure and the crossbeam structure together form a doorway for vehicles to pass through.

[0009] Beneficial effects: The above structure allows for the construction of a temporary access road, and the use of the support frame and crossbeam structures to form a portal ensures normal traffic flow without affecting the construction of the overpass. Compared to existing Bailey bridge technologies, which have a larger self-weight and require overall hoisting during installation, the support frame structure adopts a modular design. Combined with the crossbeam structure, the crossbeams can be installed in sections, facilitating rapid assembly and disassembly, improving construction efficiency, and reducing on-site operation difficulty and costs.

[0010] In one alternative embodiment, the steel box girder cross-line construction portal support device further includes a connecting rod;

[0011] The connecting rod is installed between two adjacent support frame structures along the first direction.

[0012] In one alternative embodiment, a plurality of connecting rods are provided, and the plurality of connecting rods are arranged horizontally.

[0013] Beneficial effect: The connecting rod supports two adjacent support frame components in the two support frame structures, improving structural stability.

[0014] In one alternative embodiment, the support frame structure includes:

[0015] The base is provided with at least two bases, and the at least two bases are spaced apart along a first direction and / or a second direction;

[0016] A support frame assembly, wherein each support frame assembly is provided in a corresponding manner to the base, and the support frame assembly is installed on the top of the base;

[0017] Wherein, the first direction intersects with the second direction.

[0018] In one alternative implementation, the support frame assembly includes:

[0019] A column, which is vertically installed on the base, and a plurality of columns are provided, which are spaced apart along a first direction;

[0020] A horizontal rib is horizontally installed between two adjacent columns. Several horizontal ribs are provided, and multiple horizontal ribs between two adjacent columns are spaced apart along the vertical direction.

[0021] The diagonal rib is installed obliquely between two adjacent columns.

[0022] Beneficial effects: By setting up a base to support multiple columns, with the columns pre-embedded or bolted to the base, the stability of the entire support frame structure is improved. Installing diagonal and transverse ribs between adjacent columns further enhances the stability of the entire support frame structure. It has the advantages of simple structure, low construction difficulty, low material cost, and low safety risk. The columns, transverse ribs, diagonal ribs, connecting rods, first and second transverse beams, and other components in the above-mentioned steel box girder cross-line construction portal support device are all long rods. Their height or length can be designed to appropriate dimensions according to actual needs, or they can be cut or welded on-site to adapt to the construction of steel box girders with different spans and load requirements, exhibiting high adjustability.

[0023] In one alternative embodiment, the transverse ribs are welded to the column and the diagonal ribs are bolted to the column.

[0024] In one alternative implementation, the column is bolted to the base.

[0025] In one alternative embodiment, the beam structure includes: a first beam and a second beam, wherein the first beam is mounted on the top of a column in a corresponding support frame assembly; and the second beam is mounted on the first beam.

[0026] Beneficial effects: By setting up intersecting first and second crossbeams, the first crossbeam serves as the top sealing beam of the support frame assembly, integrating the discrete support points of the four columns into a continuous linear support surface, avoiding local instability caused by uneven stress on the columns. The first crossbeam provides a horizontal installation reference surface for the second crossbeam, ensuring accurate spanning and uniform stress distribution, simplifying the construction process. Furthermore, it directly bears the load transmitted by the second crossbeam and evenly distributes it to the four columns, significantly reducing the risk of stress concentration. The second crossbeam spans multiple support frame assemblies along the first direction, integrating the dispersed support units into a continuous load-bearing system, achieving large-span coverage.

[0027] The second crossbeam, as a direct load-bearing structure, distributes the load from the overpass to the first crossbeam according to the spacing, avoiding point load impact. The second crossbeam is arranged along the second direction, forming a grid with the first crossbeam, which greatly improves the overall bending stiffness of the structure and suppresses flexural deformation; the spaced arrangement design allows for flexible adjustment of the spacing to specifically address non-uniformly distributed loads.

[0028] In one alternative embodiment, the steel box girder overpass construction portal support device further includes an adjusting pipe installed at the upper end of the second crossbeam to support the overpass.

[0029] In one alternative implementation, the beam structure is made of hot-rolled H-beams.

[0030] Beneficial effects: While ensuring load-bearing capacity, the lightweight design of the support device is achieved by optimizing the structural design and using fewer materials, further reducing the self-weight of the support and improving construction safety. Furthermore, materials such as steel pipes and I-beams can be recycled and reused after construction. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of the steel box girder cross-line construction portal support device according to an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the support frame assembly according to an embodiment of the present utility model;

[0034] Figure 3 This is a schematic diagram of the steel box girder overpass construction portal support device installed on the road section to be constructed and the construction access road, according to an embodiment of this utility model.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Support frame structure; 11. Base; 12. Support frame assembly; 121. Column; 122. Horizontal rib; 123. Diagonal rib;

[0037] 2. Beam structure; 21. First beam; 22. Second beam;

[0038] 3. Connecting rod;

[0039] 4. Road sections awaiting construction;

[0040] 5. Construction access road. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] Currently, my country's transportation industry is developing rapidly, and the transportation network is becoming more diversified, as evidenced by the frequent construction of overpasses crossing railways, rivers, highways, and provincial roads. For overpasses with different construction conditions, corresponding load-bearing support construction technologies must be selected to meet the diverse needs of these bridges.

[0043] In the past, Bailey bridges and full-span scaffolding were commonly used to support the upper steel beams. However, Bailey bridges are heavy and require overall hoisting during installation. The hoisting process is subject to many influencing factors, posing significant safety risks. Dismantling them is also difficult and costly. Full-span scaffolding has a complex doorway support structure, making construction difficult, material costs high, and safety risks high. It also requires frequent maintenance and upkeep.

[0044] To solve the above technical problems, the following will be combined with... Figures 1 to 3The following describes embodiments of the present invention.

[0045] According to an embodiment of the present invention, a support device for a steel box girder cross-line construction portal is provided, comprising a support frame structure 1 and a crossbeam structure 2.

[0046] like Figure 1 As shown, to avoid obstructing normal traffic flow, the original road section needs to be diverted before construction. The original road section is the section to be constructed (section 4), and the diverted section is a temporary construction road (section 5). The overpass to be constructed intersects with both section 4 and temporary construction road (section 5). The direction of extension of the road where section 4 intersects with the overpass is the first direction, and the direction of extension of the road where temporary construction road (section 5) intersects with the overpass is also the first direction. The direction of extension for the overpass construction is the second direction. The first and second directions intersect. (See diagram). Figures 1 to 3 As shown in the figure, arrow A represents the first direction, and arrow B represents the second direction.

[0047] like Figures 1 to 3 As shown, at least two support frame structures 1 are provided. The number of support frame structures 1 is selected according to the construction width of the overpass, and the specific selection needs to be based on the actual situation, without limitation here. In this application, four support frame structures 1 are arranged in rows on the road section to be constructed 4 and the construction access road 5. Among them, along the first direction, two support frame structures 1 are spaced apart on the road section to be constructed 4, and two support frame structures 1 are spaced apart on the construction access road 5. The two support frame structures 1 on the road section to be constructed 4 and the two support frame structures 1 on the construction access road 5 are also arranged one-to-one in the second direction to form two rows of support frame structures 1. The crossbeam structure 2 is installed on the top of the support frame structure 1. The support frame structure 1 supports the crossbeam structure 2, and the crossbeam structure 2 is used to support the overpass. The support frame structure 1 and the crossbeam structure 2 form a portal for vehicles to pass through.

[0048] The aforementioned structure adds a temporary construction road 5, forming a portal using the support frame structure 1 and the crossbeam structure 2, ensuring normal traffic flow without affecting the overpass construction. Compared to existing Bailey bridges, which have a larger self-weight and require overall hoisting during installation, the support frame structure 1 adopts a modular design. Combined with the crossbeam structure 2, the crossbeams can be installed in sections, facilitating rapid assembly and disassembly, improving construction efficiency, and reducing on-site operational difficulty and costs.

[0049] Specifically, such as Figure 1 and Figure 2As shown, each support frame structure 1 includes two bases 11 and two support frame assemblies 12. The two bases 11 in one support frame structure 1 are respectively installed on both sides of the corresponding road section 4 to be constructed or the construction access road 5. The two bases 11 in one support frame structure 1 are spaced apart along a second direction, and each base 11 is erected on the ground on one side of the corresponding road section 4 to be constructed or the construction access road 5 along a first direction. Furthermore, the two support frame structures 1 are spaced apart along the first direction on the road section 4 to be constructed or the construction access road 5 so that the bases 11 in the two support frame assemblies 12 are also spaced apart along the first direction. That is, the eight support frame assemblies 12 in the four support frame structures 1 are arranged in two rows along the second direction and in four columns along the first direction.

[0050] Each base 11 is equipped with a support frame assembly 12. Taking one of them as an example, the support frame assembly 12 includes: a column 121, a horizontal rib 122, and a diagonal rib 123.

[0051] like Figure 1 and Figure 2 As shown, four columns 121 are provided, each vertically installed on the top surface of the base 11. The four columns 121 are spaced apart on the base 11 along a first direction. Preferably, the distance between the central axes of two connected columns 121 along the first direction is 3.9m. When installing the columns 121, it is necessary to ensure that the tops of the columns 121 are all on the same horizontal plane. Several horizontal ribs 122 are provided, and the horizontal ribs 122 are horizontally installed between two adjacent columns 121. The two ends of the horizontal ribs 122 are fixed to the columns 121 on both sides respectively. Three horizontal ribs 122 are installed between every two adjacent columns 121, and the three horizontal ribs 122 are arranged vertically between the two columns 121. Several diagonal ribs 123 are provided, and these ribs are installed obliquely between two adjacent columns 121. Two diagonal ribs 123 are provided between every two columns 121, and a total of six diagonal ribs 123 are provided in one support frame assembly 12. The two ends of each diagonal rib 123 are fixed to the columns 121 on both sides. Among the two diagonal ribs 123 between every two adjacent columns 121, one is installed between the topmost and middle horizontal rib 122, and the other is installed between the middle and bottom horizontal rib 122. The two diagonal ribs 123 are installed symmetrically with respect to the middle horizontal rib 122.

[0052] When installing the uprights 121, horizontal ribs 122, and diagonal ribs 123, the uprights 121 can be bolted to the base 11, or the uprights 121 can be pre-embedded in the base 11 during its pouring process. Support brackets can be installed at corresponding positions on the uprights 121. The diagonal ribs 123 and horizontal ribs 122 can be bolted to the uprights 121, or they can be directly welded to the uprights 121. Bolting facilitates subsequent disassembly of the support frame assembly 12, while welding facilitates assembly. Bolting uses bolts for connection.

[0053] By setting a base 11 to support multiple columns 121, with the columns 121 pre-embedded or bolted to the base 11, the stability of the entire support frame structure 1 is improved. Diagonal ribs 123 and transverse ribs 122 are installed between adjacent columns 121 to further enhance the stability of the entire support frame structure 1. This design offers advantages such as simple structure, low construction difficulty, low material cost, and low safety risk.

[0054] like Figure 1 and Figure 2 As shown, the crossbeam structure 2 includes a first crossbeam 21 and a second crossbeam 22. The number of first crossbeams 21 is the same as the number of support frame assemblies 12. The first crossbeams 21 are horizontally installed on the tops of the four columns 121 of the corresponding support frame assembly 12, and the length direction of the first crossbeam 21 is along a first direction. Several second crossbeams 22 are provided, and the several second crossbeams 22 are arranged at intervals along the first direction on the tops of the first crossbeams 21. The length direction of a single second crossbeam 22 is along a second direction, and a single second crossbeam 22 spans the first crossbeams 21 above the four support frame assemblies 12 along the second direction.

[0055] By setting up intersecting first and second crossbeams 21 and 22, the first crossbeam 21 serves as the top sealing beam of the support frame assembly 12, integrating the discrete support points of the four columns 121 into a continuous linear support surface, thus avoiding local instability caused by uneven stress on the columns 121. The first crossbeam 21 provides a horizontal installation reference surface for the second crossbeam 22, ensuring accurate spanning and uniform stress distribution of the second crossbeam 22, simplifying the construction process. Furthermore, it directly bears the load transmitted by the second crossbeam 22 and evenly distributes it to the four columns 121, significantly reducing the risk of stress concentration. The second crossbeam 22 spans multiple support frame assemblies 12 along the first direction, integrating the dispersed support units into a continuous load-bearing system, achieving large-span coverage.

[0056] The second crossbeam 22, as a direct load-bearing structure, distributes the load from the overpass to the first crossbeam 21 according to the spacing, avoiding point load impact. The second crossbeam 22 is arranged along the second direction, forming a grid with the first crossbeam 21, which greatly improves the overall bending stiffness of the structure and suppresses flexural deformation; the spaced arrangement design allows for flexible adjustment of the spacing to specifically address non-uniformly distributed loads.

[0057] The support device for the steel box girder overpass construction portal also includes an adjusting pipe (not shown in the figure), with a length of 400-800 mm. Several adjusting pipes are installed at the upper end of the second crossbeam 22 and support the overpass.

[0058] like Figure 1 As shown, the support device for the steel box girder overpass construction portal also includes connecting rods 3, which are installed between two adjacent support frame structures 1 along the first direction. Several connecting rods 3 are provided, and these connecting rods 3 are horizontally arranged. The connecting rods 3 support two adjacent support frame assemblies 12 that are close to each other in the two adjacent support frame structures 1, improving structural stability.

[0059] The components of the above-mentioned steel box girder cross-line construction portal support device, such as column 121, horizontal rib 122, diagonal rib 123, connecting rod 3, first horizontal beam 21 and second horizontal beam 22, are all long rods. Their height or length can be designed to meet the actual needs, or they can be cut or welded on-site to adapt to the construction of steel box girders with different spans and load requirements, and have high adjustability.

[0060] The upright column 121 uses φ325x8 steel pipe, the horizontal rib 122 uses 14a channel steel, and the diagonal rib 123 uses 10 channel steel. The first and second horizontal beams 21 and 22 use HW400x400 hot-rolled H-beams. While ensuring load-bearing capacity, the lightweight design of the support device is achieved through optimized structural design and the use of fewer materials, further reducing the self-weight of the support and improving construction safety. Furthermore, the steel pipes and H-beams can be recycled and reused after construction.

[0061] During construction, dimensions can be measured in advance and pre-assembled in the factory for quick connection, reducing on-site work time and improving construction efficiency.

[0062] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A support device for a steel box girder overpass construction portal, characterized in that, include: A support frame structure (1), wherein at least two support frame structures (1) are provided, and at least two support frame structures (1) are spaced apart along a first direction; A crossbeam structure (2) is installed on the top of the support frame structure (1) and is used to support the overpass. The support frame structure (1) and the crossbeam structure (2) together form a doorway for vehicles to pass through.

2. The steel box girder overpass construction portal support device according to claim 1, characterized in that, The steel box girder cross-line construction portal support device also includes a connecting rod (3). The connecting rod (3) is installed between two adjacent support frame structures (1) along the first direction.

3. The steel box girder cross-line construction portal support device according to claim 2, characterized in that, The connecting rod (3) is provided in several parts, and the connecting rod (3) is arranged horizontally.

4. The steel box girder overpass construction portal support device according to claim 1, characterized in that, The support frame structure (1) includes: A base (11), wherein at least two bases (11) are provided, and at least two bases (11) are spaced apart along a first direction and / or a second direction; A support frame assembly (12) is provided in a one-to-one correspondence with the base (11), and the support frame assembly (12) is installed on the top of the base (11); Wherein, the first direction intersects with the second direction.

5. The steel box girder cross-line construction portal support device according to claim 4, characterized in that, The support frame assembly (12) includes: A column (121) is vertically installed on the base (11). A plurality of columns (121) are provided, and the plurality of columns (121) are spaced apart along a first direction. A horizontal rib (122) is horizontally installed between two adjacent columns (121). Several horizontal ribs (122) are provided, and multiple horizontal ribs (122) between two adjacent columns (121) are spaced apart along the vertical direction. A diagonal rib (123) is obliquely installed between two adjacent columns (121).

6. The steel box girder cross-line construction portal support device according to claim 5, characterized in that, The horizontal rib (122) and the column (121) are connected by welding or bolting, as are the diagonal rib (123) and the column (121).

7. The steel box girder overpass construction portal support device according to claim 5, characterized in that, The column (121) is bolted to the base (11).

8. The steel box girder overpass construction portal support device according to claim 5, characterized in that, The beam structure (2) includes a first beam (21) and a second beam (22), wherein the first beam (21) is installed on the top of the column (121) in the corresponding support frame assembly (12); and the second beam (22) is installed on the first beam (21).

9. The steel box girder overpass construction portal support device according to claim 8, characterized in that, The steel box girder overpass construction portal support device also includes an adjustment pipe, which is installed at the upper end of the second crossbeam (22) to support the overpass.

10. The steel box girder cross-line construction portal support device according to any one of claims 1-9, characterized in that, The beam structure (2) is made of hot-rolled H-beams.

Images