Steel box girder and bridge structure

Abstract

The utility model discloses a steel box girder and bridge structure relates to bridge engineering technical field, wherein the steel box girder includes contact plate structure, web structure and partition plate structure, contact plate structure includes bottom plate and top plate, web structure is provided between top plate and bottom plate to form the inner cavity between top plate and bottom plate, and partition plate structure is provided in the inner cavity between top plate and bottom plate. The partition plate structure comprises a plurality of first partition plates and a plurality of second partition plates, the first partition plates and the second partition plates are alternately arranged in the inner cavity in the first direction, first through holes and second through holes are formed in the first partition plates and the second partition plates correspondingly, the second through holes are larger than the first through holes, and the first direction is the horizontal direction; according to the technical scheme, on the premise that the strength and shock resistance of the whole steel box girder are guaranteed, the overall weight of the whole steel box girder structure can be well reduced, and therefore convenience in the installation process of the steel box girder structure is improved.

Description

Technical Field

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

[0002] Steel box girders, also known as steel plate box girders, are a structural form commonly used in long-span bridges. They are named for their box-like shape. Steel box girders are typically used in bridges with large spans because they offer high load-bearing capacity and good stability. The cross-section of a steel box girder is usually wide and flat, with a height-to-width ratio of approximately 1:10. This structural form makes steel box girders highly efficient when bearing large-span loads. Steel box girders are generally constructed by welding together top plates, bottom plates, webs, transverse diaphragms, longitudinal diaphragms, and stiffeners. This manufacturing method gives steel box girders high integrity and stability. As the primary load-bearing structure, they must meet high support strength requirements, but traditional steel box girder structures often struggle to balance support strength, seismic resistance, and ease of installation. Utility Model Content

[0003] The main purpose of this utility model is to propose a steel box girder and bridge structure, which aims to solve the problem that traditional steel box girder structures often cannot effectively balance support strength, seismic resistance and ease of installation.

[0004] To achieve the above objectives, the steel box girder proposed in this utility model includes:

[0005] The contact plate structure includes a bottom plate and a top plate;

[0006] A web structure is disposed between the top plate and the bottom plate to form an internal cavity between the top plate and the bottom plate; and,

[0007] The partition structure includes multiple first partitions and multiple second partitions. The multiple first partitions and multiple second partitions are arranged alternately in the inner cavity along a first direction. The first partitions and the second partitions are respectively provided with a first through hole and a second through hole, and the second through hole is larger than the first through hole.

[0008] The first direction is the horizontal direction.

[0009] In one embodiment, the bottom plate and the top plate are respectively provided with a plurality of first mounting plates and a plurality of limiting protrusions extending in a first direction on one end face corresponding to the inner cavity;

[0010] The first partition and the second partition are provided with multiple mounting slots and limiting slots at both ends of the vertical direction, corresponding to multiple first mounting plates and multiple limiting protrusions.

[0011] In one embodiment, the limiting groove includes:

[0012] The first groove section is configured as an inclined groove, and its two inner walls gradually converge from its outer opening end towards its interior to form an inner groove opening; and,

[0013] The second groove section is connected to the inner groove opening, and the horizontal groove width of the second groove section is greater than the horizontal opening of the inner groove opening;

[0014] One end of the limiting protrusion is located inside the second groove section, and the two side walls of the limiting protrusion are in contact with the two inclined inner walls of the first groove section.

[0015] In one embodiment, the first partition plate is provided with two first reinforcing horizontal plates, and two first reinforcing vertical plates are provided between the two first reinforcing horizontal plates to form a first frame, and the first through hole is provided on the inner side of the first frame; and / or,

[0016] The second partition plate is provided with two second reinforcing cross plates, and the second through hole is located between the two second reinforcing cross plates; and / or,

[0017] Both the first through hole and the second through hole are configured as square holes.

[0018] In one embodiment, the web structure includes two side webs and a middle web, both of which are mounted on the mounting surface between the bottom plate and the bottom plate, and the middle web is located in the middle of the two side webs to divide the inner cavity into two mounting chambers.

[0019] A plurality of first partitions and a plurality of second partitions are respectively disposed in the two mounting chambers, and the plurality of first partitions and a plurality of second partitions in the mounting chambers are arranged alternately.

[0020] In one embodiment, the two side webs are provided with a plurality of first retaining plates along the first direction on one side of the mounting cavity, and a first mounting groove is formed between adjacent ends of the plurality of first retaining plates. The two sides of the middle web are provided with a plurality of second retaining plates along the first direction, and a second mounting groove is formed between adjacent ends of the plurality of second retaining plates. The horizontal ends of the first partition and the second partition are respectively installed between the corresponding first mounting groove and the second mounting groove.

[0021] The plurality of first cards and the plurality of second cards in the first direction are configured in at least two layers in the vertical direction.

[0022] In one embodiment, the steel box girder further includes an eaves structure, the eaves structure comprising:

[0023] Multiple hip-supporting beams are evenly spaced along the first direction and installed on the outer sides of the two side plates; and,

[0024] Two eaves panels are respectively disposed on multiple cantilever beams on the two side webs, and one horizontal end of the eaves panel is connected to the side end of the top plate.

[0025] In one embodiment, each of the multiple hip beams is provided with a plurality of first adapter parts, and the eaves plate is provided with a plurality of second adapter parts corresponding to the plurality of first adapter parts, and the eaves plate is fixedly connected to the hip beams by welding.

[0026] In one embodiment, both the bottom plate and the top plate are welded together from multiple unit plates.

[0027] This utility model also discloses a bridge structure, which includes the steel box girder in the above embodiments.

[0028] In the technical solution of this utility model, the arrangement of the first partition and the second partition can effectively reduce the overall mass of the entire beam structure while ensuring the overall strength of the steel box girder structure. In the actual construction process, it can improve the convenience of installation of each structure to a certain extent. Furthermore, during the actual installation of the partition structure, there are corresponding installation structures to limit and fix it, which not only ensures that the entire beam structure has good seismic resistance, but also allows the relative positional stability of each structure of the entire beam to be maintained, which is conducive to improving the overall stability and strength of the entire beam structure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the overall structure of an embodiment of the steel box girder provided by this utility model;

[0031] Figure 2 for Figure 1 The exploded view of the steel box girder provided in the image;

[0032] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0033] Figure 4 for Figure 2 A schematic diagram of the structure of the first partition plate;

[0034] Figure 5 for Figure 2 A schematic diagram of the structure of the second partition.

[0035] Explanation of icon numbers:

[0036] 100. Steel box girder; 1. Contact plate structure; 11. Bottom plate; 111. First mounting plate; 12. Top plate; 121. Limiting protrusion; 2. Partition structure; 21. First partition; 211. First reinforcing horizontal plate; 212. First reinforcing vertical plate; 213. First through hole; 22. Second partition; 221. Second reinforcing horizontal plate; 222. Second through hole; 23. Mounting slot; 24. Limiting groove; 241. First groove section; 242. Inner groove opening; 243. Second groove section; 3. Web structure; 31. Side web; 311. First clamping plate; 312. First mounting groove; 32. Intermediate web; 321. Second clamping plate; 322. Second mounting groove; 32. Mounting chamber; 4. Eaves structure; 41. Cantilever beam; 42. Eaves piece; 5. Welding groove.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] 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 scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] Steel box girders, also known as steel plate box girders, are a structural form commonly used in long-span bridges. They are named for their box-like shape. Steel box girders are typically used in bridges with large spans because they offer high load-bearing capacity and good stability. The cross-section of a steel box girder is usually wide and flat, with a height-to-width ratio of approximately 1:10. This structural form makes steel box girders highly efficient when bearing large-span loads. Steel box girders are generally constructed by welding together top plates, bottom plates, webs, transverse diaphragms, longitudinal diaphragms, and stiffeners. This manufacturing method gives steel box girders high integrity and stability. As the primary load-bearing structure, they must meet high support strength requirements, but traditional steel box girder structures often struggle to balance support strength, seismic resistance, and ease of installation.

[0042] This utility model proposes a steel box girder 100 to solve the above problems.

[0043] Please see Figures 1 to 5Steel box girders are an important structural component in road and bridge construction. As a primary load-bearing structure, they must meet high support strength requirements while also considering stability and seismic resistance. Furthermore, as one of the main supporting components, their size and weight are relatively large, which undoubtedly increases the difficulty of installation. Therefore, this embodiment proposes a steel box girder 100 that, while meeting the basic requirements for support strength, stability, and seismic resistance, facilitates installation, reduces material usage, and lowers costs. Specifically, the steel box girder 100 mainly includes a contact plate structure 1, a web structure 3, and a partition structure 2. The contact plate structure 1, as its name suggests, is the main load-bearing contact structure, comprising a horizontally arranged bottom plate 11 and a top plate 12 structure above the bottom plate 11. During actual installation, the bottom plate 11 connects to the corresponding pier structure to support the entire girder. The top plate 12 is the direct load-bearing structure. The web structure 3 is disposed between the top plate 12 and the bottom plate 11, connecting the top plate 12 and the bottom plate 11, and forming an inner cavity between the top plate 12 and the bottom plate 11. To increase the overall strength of the entire steel box girder 100, a partition structure 2 is provided within the inner cavity. Specifically, the partition structure 2 includes multiple first partitions 21 and multiple second partitions 22. These partitions are disposed within the inner cavity and connected to the web, the top plate 12, and the bottom plate 11, thereby supporting the inner cavity. Furthermore, the partitions are spaced apart along a first direction, providing overall support to the inner cavity along this direction. This ensures that the support strength of the entire steel box girder 100 remains consistent, thereby improving the uniformity and stability of the entire beam structure. The partition structure 2 includes the two plate-like structures described above. A first through hole 213 and a second through hole 222 are respectively provided on the first partition 21 and the second partition 22. In this embodiment, while ensuring the overall support strength of the entire beam structure, the second through hole 222 is set to be a larger through hole structure. Furthermore, to avoid affecting the uniformity of the entire beam structure due to differences in the first partition 21 and the second partition 22 structures, in this embodiment, multiple first partitions 21 and multiple second partitions 22 are arranged alternately along the first direction. In specific implementation, the perforated structure not only improves the seismic resistance of the entire beam structure, but the larger second through hole 222 effectively reduces the use of steel structure material, which not only helps reduce the overall weight of the entire beam structure but also greatly improves the convenience of the partition structure 2 installation process.

[0044] The base plate 11 and the top plate 12 are two vertical mounting structures. Each of the base plate 11 and the top plate 12 has a plurality of first mounting plates 111 and a plurality of limiting protrusions 121 on one end face corresponding to the inner cavity. The plurality of first mounting plates 111 and the plurality of limiting protrusions 121 extend along the first direction. At both ends of the first partition plate 21 and the second partition plate 22 in the vertical direction, a plurality of mounting slots 23 and limiting grooves 24 are respectively provided corresponding to the plurality of first mounting plates 111 and the plurality of limiting protrusions 121. During actual installation, the plurality of mounting slots 23 on the lower ends of the first partition plate 21 and the second partition plate 22 are respectively engaged with the plurality of first partition plates 21. Then, by setting corresponding support structures, the first partition plate 21 and the second partition plate 22 are kept relatively perpendicular to the base plate 11. Finally, the mounting slots 23 are welded to the first mounting plates 111 at their contact points. When the top plate 12 is installed, multiple limiting protrusions 121 are recessed and installed in the limiting groove 24, so that the upper ends of the first partition 21 and the second partition 22 support the inner wall of the top plate 12 and limit the installation of the top plate 12. After the installation is completed, the limiting protrusions 121 and the limiting groove 24 can be welded and fixed by welding.

[0045] The limiting groove 24 specifically comprises two parts: a first groove segment 241 connected to the outer groove opening, wherein the outer groove opening of the first groove segment 241 is larger than its inner groove opening 242, forming a trumpet-shaped groove with two inclined inner walls; and a second groove segment 243 located inside the first groove segment 241 and connected to the inner groove opening 242. It should be noted that the horizontal groove width at the middle section of the second groove segment 243 is larger than the opening size of the inner groove opening 242. Correspondingly, the limiting protrusion 121 has a trapezoidal cross-section in the width direction. When the top plate 12 is installed, the smaller end of the limiting protrusion 121 is located inside the second groove segment 243, and the two inclined sidewalls of the limiting protrusion 121 contact the two inclined inner walls of the first groove segment 241. When the top plate 12 vibrates, one end of the limiting protrusion 121 can have a certain tendency to move within the second groove section 243, which can effectively improve the shock resistance of the entire top plate 12. After the top plate 12 is installed, the inner groove 242 can effectively prevent the front end of the limiting protrusion 121 from coming out of the second groove section 243, thereby improving the structural stability of the entire top plate 12 after installation.

[0046] After the first partition 21 and the second partition 22 are installed, they can connect the web structure 3 in the horizontal direction, and at the same time connect the top plate 12 and the bottom plate 11 in the vertical direction. Therefore, the first partition 21 and the second partition 22 must have certain torsional resistance. For the steel box girder 100, it must be able to withstand huge pressure. Therefore, the torsional resistance of the first partition 21 and the second partition 22 needs to be further strengthened to avoid structural deformation of the entire steel box girder 100 after it is put into use. Therefore, in this embodiment, two first reinforcing horizontal plates 211 are provided on the first partition 21, and two first reinforcing vertical plates 212 are provided between the two first reinforcing horizontal plates 211 to form a first frame. The first through hole 213 is provided on the inner side of the first frame. The frame structure is provided on the outer side of the first through hole 213, which can effectively strengthen the structural features at the first through hole 213. In addition, the lengths of the two first reinforcing horizontal plates 211 correspond to the length of the first partition 21, which can maximize the torsional strength of the entire first partition 21. In order to further improve the overall strength of the entire first partition 21, the first frame can be provided on both sides of the first partition 21. Similarly, for the second partition 22, a second reinforcing horizontal plate 221 with the same length as the second partition 22 is provided on the upper and lower ends of one end face corresponding to the second through hole 222. It is conceivable that the first partition 21 and the first frame can be welded from multiple plates or can be set as an integral molding structure. The second partition 22 and the second reinforcing horizontal plate 221 can also be welded structures or integral molding structures. Before actual installation, the first partition 21 and the second partition 22 can be configured as prefabricated structures, and during installation, they can be directly installed on the base plate 11.

[0047] In this embodiment, both the first through hole 213 and the second through hole 222 are set as square holes.

[0048] The web structure 3 specifically includes two side webs 31 located at both ends of the beam structure and a middle web 32 located between the two side webs 31. The middle web 32 divides the inner cavity into two identical mounting chambers 32, in which multiple first partitions 21 and multiple second partitions 22 are spaced apart along the first direction. The middle partition effectively supports the central structure of the top plate 12 and divides the multiple first partitions 21 and multiple second partitions 22 along their length into two shorter length units, which are then installed in the two mounting chambers 32 respectively. This arrangement effectively improves the torsional resistance of each partition unit, contributing significantly to the overall structural strength.

[0049] Specifically, the two ends of the first partition plate 21 and the second partition plate 22 in the horizontal direction are fixedly installed between the side web plate 31 and the intermediate web plate 32. The two side web plates 31 are provided with a plurality of first retaining plates 311 along the first direction on one side of the mounting chamber 32, and a first mounting groove 312 is formed between adjacent ends of the plurality of first retaining plates 311. In addition, a plurality of second retaining plates 321 are provided on both sides of the intermediate web plate 32 along the first direction, and a second mounting groove 322 is formed between adjacent ends of the plurality of second retaining plates 321. The horizontal ends of the first partition plate 21 and the second partition plate 22 are respectively installed between the corresponding first mounting groove 312 and second mounting groove 322.

[0050] In the actual installation process, for one of the installation chambers 32, multiple first partitions 21 and multiple second partitions 22 are first installed on the base plate 11 along the first direction. Then, the corresponding side webs 31 and the intermediate webs 32 are installed. During the installation process, the first mounting grooves 312 and the second mounting grooves 322 are respectively installed on the two vertical sides of the first partition 21 or the second partition 22 in the horizontal direction. The first mounting grooves 312 and the second mounting grooves 322 limit the first partition 21 and the second partition 22 in the first direction. Then, the partition structure 2 is fixedly connected to the side webs 31 and the intermediate webs 32 by welding. In this process, in order to further ensure the stability of the first partition 21 and the second partition 22 after installation, the multiple first clamping plates 311 and multiple second clamping plates 321 in the first direction can be set to at least two layers in the vertical direction. The partition structure 2 is limited by the two layers of limiting structures, thereby improving the convenience of installation and the stability of the overall structure.

[0051] The steel box girder 100 also includes eaves structures 4 on both horizontal sides of the top plate 12. The upper surface of the eaves structure 4 is flush with the upper surface of the top plate 12, which can effectively widen the support area of ​​the entire top plate 12 structure. Specifically, the eaves structure 4 includes multiple cantilever beams 41 and two eaves pieces 42. The multiple cantilever beams 41 are evenly spaced along the first direction on the outer side of the two side webs 31. The two eaves pieces 42 are respectively disposed on the multiple cantilever beams 41 on the two side webs 31, and the horizontal end of the eaves piece 42 is connected to the side end of the top plate 12. Before actual installation, the eaves pieces 42 and the multiple cantilever beams 41 can be assembled into an integral prefabricated structure. During actual installation, it can be welded as a whole to the side webs 31 and the top plate 12, thereby effectively improving the convenience of the installation process and promoting the improvement of installation efficiency.

[0052] To ensure the stability of the overall structure of the cantilever beam 41 and the eaves panel 42, multiple first adapter parts are provided on each of the cantilever beams 41, and multiple second adapter parts are provided on each of the eaves panel 42 corresponding to the multiple first adapter parts. During installation, the first adapter parts and the second adapter parts are first matched to initially position the eaves panel 42. Specifically, the first adapter parts and the second adapter parts can be configured as the mating structure between the first mounting plate 111 and the mounting slot 23 in the above embodiment, or the mating structure between the limiting slot 24 and the limiting protrusion 121, or a combination of the above two structures, etc. After the eaves panel 42 and the multiple cantilever beams 41 are initially positioned, they are fixedly connected by welding.

[0053] Because the overall volume of the steel box girder is generally relatively large, in order to meet the specific stress design requirements, the span of the steel structure plates of the top plate 12 and the bottom plate 11 is also relatively large. It is difficult to install such large-sized and heavy structural steel plates. Therefore, multiple relatively small structural unit plates are usually welded together to form the overall bottom plate 11 and the top plate 12.

[0054] It should be noted that, in order to better facilitate the construction and installation of the steel box girder 100, it can be divided into multiple smaller structural units. For example, the two eaves structures 4 in the steel box girder 100 can be made into separate prefabricated components, and the beam structure corresponding to the position of the intermediate web 32 can be separated into two relatively independent main beam structures along the first direction. In the actual installation process, the above multiple unit components can be welded together. This method can effectively reduce the difficulty of transporting each structure and can be selected and used according to the actual situation.

[0055] Furthermore, since most of the structural components in the steel box girder 100 are fixedly connected by welding, welding grooves 5 are generally provided at the welding positions to improve the fatigue strength and ensure the welding quality and aesthetics. Returning to the relevant structure in this solution, the welding grooves 5 can be provided on the vertical ends of the first partition plate 21 and the second partition plate 22 that contact the first mounting groove 312 and the second mounting groove 322, or they can be provided on the inner wall of the mounting slot 23 that contacts the first mounting plate 111. Of course, corresponding welding groove 5 structures can be provided at any welding position in this solution to improve welding quality; these will not be elaborated upon here.

[0056] This utility model also includes a bridge structure, which includes a steel box girder 100. The steel box girder 100 specifically includes the relevant content disclosed in the above embodiments. Since the bridge structure adopts all the technical solutions in the above embodiments, the bridge structure has the relevant beneficial effects of the above embodiments, which will not be repeated here.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A steel box girder, characterized in that, include: The contact plate structure includes a bottom plate and a top plate; A web structure is provided between the top plate and the bottom plate to form an inner cavity between the top plate and the bottom plate; as well as, The partition structure includes multiple first partitions and multiple second partitions. The multiple first partitions and multiple second partitions are arranged alternately in the inner cavity along a first direction. The first partitions and the second partitions are respectively provided with a first through hole and a second through hole, and the second through hole is larger than the first through hole. The first direction is the horizontal direction.

2. The steel box girder as described in claim 1, characterized in that, The bottom plate and the top plate are respectively provided with a plurality of first mounting plates and a plurality of limiting protrusions extending in a first direction on one end face corresponding to the inner cavity; The first partition and the second partition are provided with multiple mounting slots and limiting slots at both ends of the vertical direction, corresponding to multiple first mounting plates and multiple limiting protrusions.

3. The steel box girder as described in claim 2, characterized in that, The limiting groove includes: The first groove section is configured as an inclined groove, and its two inner walls gradually converge from its outer opening end towards its interior to form an inner groove opening; and, The second groove section is connected to the inner groove opening, and the horizontal groove width of the second groove section is greater than the horizontal opening of the inner groove opening; One end of the limiting protrusion is located inside the second groove section, and the two side walls of the limiting protrusion are in contact with the two inclined inner walls of the first groove section.

4. The steel box girder as described in claim 3, characterized in that, The first partition plate is provided with two first reinforcing horizontal plates, and two first reinforcing vertical plates are provided between the two first reinforcing horizontal plates to form a first frame. The first through hole is provided on the inner side of the first frame; and / or, The second partition plate is provided with two second reinforcing cross plates, and the second through hole is located between the two second reinforcing cross plates; and / or, Both the first through hole and the second through hole are configured as square holes.

5. The steel box girder as described in claim 1, characterized in that, The web structure includes two side webs and a middle web. The two side webs and the middle web are installed between the top plate and the bottom plate, and the middle web is located in the middle of the two side webs to divide the inner cavity into two installation chambers. A plurality of first partitions and a plurality of second partitions are respectively disposed in the two mounting chambers, and the plurality of first partitions and a plurality of second partitions in the mounting chambers are arranged alternately.

6. The steel box girder as described in claim 5, characterized in that, The two side webs are provided with a plurality of first retaining plates along the first direction on one side of the mounting cavity, and a first mounting groove is formed between the adjacent ends of the plurality of first retaining plates. The two sides of the middle web are provided with a plurality of second retaining plates along the first direction, and a second mounting groove is formed between the adjacent ends of the plurality of second retaining plates. The horizontal ends of the first partition and the second partition are respectively installed between the corresponding first mounting groove and the second mounting groove. The plurality of first cards and the plurality of second cards in the first direction are configured in at least two layers in the vertical direction.

7. The steel box girder as described in claim 5, characterized in that, The steel box girder also includes an eaves structure, which comprises: Multiple hip-supporting beams are evenly spaced along the first direction and installed on the outer sides of the two side plates; and, Two eaves panels are respectively disposed on multiple cantilever beams on the two side webs, and one horizontal end of the eaves panel is connected to the side end of the top plate.

8. The steel box girder as described in claim 7, characterized in that, Each of the multiple hip beams is provided with multiple first adapter parts, and the eaves plate is provided with multiple second adapter parts corresponding to the multiple first adapter parts, and the eaves plate is fixedly connected to the hip beams by welding.

9. The steel box girder as described in claim 1, characterized in that, Both the bottom plate and the top plate are welded together from multiple unit plates.

10. A bridge structure, characterized in that, Including the steel box girder as described in any one of claims 1-9.

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