Steel box structure, steel box girder and movable modularized steel box girder bridge

Abstract

The utility model provides a steel box structure, a steel box girder and a movable modularized steel box girder bridge, which relates to the technical field of bridge steel boxes and comprises a steel box, the steel box girder formed by combining the steel box structures and the movable modularized steel box girder bridge comprising the steel box girder. The steel box is of a closed box body structure formed by welding a top plate, a bottom plate, webs, transverse partition plates and reinforcing transverse ribs, U-shaped longitudinal stiffening ribs and I-shaped longitudinal stiffening ribs are welded to the top plate and the bottom plate in the longitudinal direction respectively, the transverse partition plates and the reinforcing transverse ribs are arranged in the box body at certain intervals in the longitudinal direction of the bridge, a plurality of splice plates are arranged on the outer sides of the webs, and the splice plates are connected with the U-shaped longitudinal stiffening ribs and the I-shaped longitudinal stiffening ribs. And the two transversely adjacent steel box girder sections are connected through the connecting plates by adopting high-strength bolts. The structure system is simple and reliable, has high bearing capacity and high mounting and moving speed, and solves the problems that strip mine passing vehicles are large in load, the bridge arrangement position needs to be adjusted frequently, and a traditional structure is high in investment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge steel box technical field, especially relate to a steel box structure, steel box girder, removable modular steel box girder bridge. BACKGROUND

[0002] In the production process of the open-pit coal mine, the layout of the transportation road needs to be continuously adjusted to adapt to the changes of the pit and the inner side slope topography in the open-pit, especially the intersection points of the stripping road and the production system. With the advance of the mining and stripping and drainage project, the frequent changes of these intersection points put forward very high requirements on the bridge structure. At present, domestic open-pit coal mines face many challenges in bridge construction: the position of the intersection point changes rapidly, and the traditional bridge structure is difficult to adapt; the bridge construction period is long, which has a great impact on production organization; the existing bridge structure has deficiencies in timeliness and rapidity and cannot meet the production demand of high efficiency; it lacks mobility and is difficult to realize rapid adjustment when the position of the intersection point changes, and the moving process easily affects the production system of the belt conveyor; in addition, the heavy load of the passing vehicles in the open-pit coal mine puts forward higher requirements on the carrying capacity of the bridge structure.

[0003] At present, the main girder section form of the steel box girder bridge is most commonly used in box section, compared with the truss girder and the composite girder, the box section has the advantages of light weight, large bending stiffness, rapid installation, convenient maintenance, simple and beautiful appearance, etc., and therefore has been widely used in engineering practice. However, the traditional single-box multi-chamber box section is difficult to erect and move on site due to its large size and weight, which does not meet the demand of rapid adjustment of the open-pit coal mine bridge. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a steel box structure, a steel box girder, a removable modular steel box girder bridge and a manufacturing method, that is, the box section is divided into multiple modular units, so as to solve the problems of heavy load of the passing vehicles in the open-pit mine, frequent adjustment of the bridge setting position and high investment of the traditional structure.

[0005] The technical scheme adopted by the utility model is: a steel box structure, which has the technical key points that a closed box structure is formed by welding a top plate, a bottom plate, a web plate and a transverse partition plate and a reinforcing transverse rib, the transverse partition plate and the reinforcing transverse rib are alternately arranged at a certain interval along the bridge longitudinal direction in the box, U-shaped longitudinal stiffening ribs and I-shaped longitudinal stiffening ribs are respectively welded on the top plate and the bottom plate in the longitudinal direction, a plurality of splicing plates are arranged on the outer side of the web plate, and two adjacent steel box girder sections are connected by connecting plates through high-strength bolts.

[0006] Further, the top of the transverse partition plate is provided with a mounting groove for mounting the U-shaped longitudinal stiffening rib, the bottom is provided with a through hole for passing the I-shaped longitudinal stiffening rib, and a manhole for connecting the adjacent two steel boxes is further arranged on the transverse partition plate.

[0007] Furthermore, a mounting groove for installing U-shaped stiffening ribs is provided at the top of the reinforcing transverse ribs, and a first reinforcing plate is provided below the mounting groove. The first reinforcing plate is welded between the left and right web plates. A second reinforcing plate is also provided below the first reinforcing plate to strengthen the vertical plate of the reinforcing transverse ribs. The second reinforcing plate is welded to the vertical plate and located inside the steel box.

[0008] Furthermore, the web plate is welded with splicing plates and support plates, and the splicing plates have bolt holes for connecting two steel box girder segments.

[0009] A steel box girder structure, the key technical point of which is that it is composed of the aforementioned steel box structures.

[0010] A movable modular steel box girder bridge, the key technical feature of which is that it includes the aforementioned steel box girder structure.

[0011] The beneficial effects of this utility model are as follows: The steel box structure, steel box girder, movable modular steel box girder bridge, and manufacturing method, wherein the steel box girder is a closed box structure formed by welding a top plate, bottom plate, web plate, transverse diaphragms, and reinforcing transverse ribs, and the steel box structure combination constitutes the steel box girder, which has the following advantages:

[0012] 1. High adaptability: Modular steel box girder bridges can quickly adapt to changes in mine terrain and frequent changes in intersection locations, solving the problem that traditional bridge structures are difficult to adapt to.

[0013] 2. Timeliness and speed: The modular steel box girder bridge's rapid installation and dismantling characteristics greatly improve the bridge's construction speed, shorten the construction cycle, reduce the impact on open-pit mine production organization, and meet the open-pit mine's demand for high efficiency.

[0014] 3. Mobility: The steel box girder of this utility model has excellent mobility, which can be quickly adjusted when the position of the intersection changes, and the impact on the main coal transportation road is minimized during the relocation process.

[0015] 4. High load-bearing capacity: In view of the heavy load characteristics of vehicles passing through open coal mines, the steel box girder structure adopts a narrow box form to ensure the high load-bearing capacity of the bridge structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in 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 from these drawings without creative effort.

[0017] Figure 1A structural schematic diagram of the steel box girder section of the embodiment;

[0018] Figure 2 A schematic diagram of explosion of the steel box girder section of the embodiment;

[0019] Figure 3 A schematic diagram of the superstructure of the steel box girder bridge of the embodiment;

[0020] Figure 4 A schematic diagram of the cross section of the superstructure of the steel box girder bridge of the embodiment;

[0021] Figure 5 A partial A enlarged view of the transverse connection of the steel box girder section of the embodiment.

[0022] The serial number in the figure is explained as follows: 1 - top plate, 11 - U-shaped longitudinal stiffening rib, 2 - bottom plate, 21 - I-shaped longitudinal stiffening rib, 3 - web plate, 31 - splicing plate, 32 - support plate, 4 - transverse partition plate, 41 - manhole, 5 - reinforcing transverse rib, 51 - first reinforcing plate, 52 - second reinforcing plate, 6 - connecting plate, 7 - high-strength bolt. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the utility model will be explained in further detail in combination with the accompanying drawings and specific embodiments. Figures 1-5 and the specific embodiments. Embodiment 1:

[0024] The steel box girder section structure of the embodiment is shown in the figure, which is a closed box structure formed by welding the top plate 1, the bottom plate 2 and the two web plates 3, and the transverse partition plates 4 and the reinforcing transverse ribs 5 are arranged in the box body along the length direction of the web plates 3. Figures 1-5

[0025] The top plate 1 and the bottom plate 2 of the embodiment are drawn with positioning lines, which ensure the assembly precision of the U-shaped longitudinal stiffening ribs 11, the I-shaped longitudinal stiffening ribs 21, the web plates 3, the transverse partition plates 4 and the reinforcing transverse ribs 5.

[0026] The embodiment adopts two U-shaped longitudinal stiffening ribs 11 and two I-shaped longitudinal stiffening ribs 21, and the number can be customized and adjusted according to the specific engineering application conditions and structural performance requirements.

[0027] The top part of the transverse partition plate 4 of the embodiment is provided with a mounting groove for mounting the U-shaped longitudinal stiffening rib, the bottom part is provided with a through hole for passing the I-shaped longitudinal stiffening rib, and the transverse partition plate 4 is further provided with a manhole 41 for connecting the adjacent two steel boxes.

[0028] ​The top of the reinforcing cross rib 5 of the embodiment is provided with a mounting groove for mounting the U-shaped stiffening rib, and a first reinforcing plate 51 is arranged below the mounting groove, which is welded between the left and right webs 3. A second reinforcing plate 52 for reinforcing the vertical plate of the reinforcing cross rib 5 is further arranged below the first reinforcing plate 51, which is welded on the vertical plate and located inside the steel box.

[0029] The outer side of the web 3 of the embodiment is provided with a plurality of splice plates 31, and two adjacent steel box girder segments in the transverse direction are connected by the connecting plate 6 using high-strength bolts 7.

[0030] The web 3 of the embodiment is welded with a splice plate 31 and a support plate 32, and the splice plate 31 has bolt holes on the upper surface for connecting two steel box girder segments.

[0031] The manufacturing process of the steel box structure adopted in the embodiment mainly includes the following steps:

[0032] S1, the steel box girder segment manufacturing is entirely cut, blanked, corrected, and punched according to the processing drawing in the factory;

[0033] S2, the top plate 1 and the bottom plate 2 are placed on the assembly jig, and the longitudinal base lines of the U-shaped longitudinal stiffening rib 11 and the I-shaped longitudinal stiffening rib 21 are accurately aligned and positioned with the positioning lines on the top plate 1 and the bottom plate 2 and are welded;

[0034] S3, the assembled bottom plate 2 is placed on the horizontal jig, and the cross diaphragm 4 and the reinforcing cross rib 5 are assembled and marked to ensure their perpendicularity;

[0035] S4, the web 3 is assembled with the longitudinal base line of the bottom plate 2 as the reference, and the two side webs 3 are tightly fitted with the cross diaphragm 4 and the reinforcing cross rib 5, and the straightness of the web is controlled;

[0036] S5, the top plate 1 is positioned, and the top plate 1 is assembled and welded into a box body;

[0037] The manufacturing process of the steel box girder adopted in the embodiment mainly includes the following steps:

[0038] S6, the assembled box body is placed on the horizontal jig, and the splice plate 31 is welded according to the positioning line, and then painting is performed.

[0039] The installation and disassembly of the modular steel box girder bridge superstructure suitable for heavy traffic adopted in the embodiment mainly include the following steps:

[0040] S1, after the steel beam segment is manufactured in the field, the finished product of the steel beam segment is transported to the construction site by car, and the steel beam is hoisted to the temporary support erected on the site by a crane. In the assembly operation, a plurality of splicing plates 31 installed outside the web 3 of the steel box girder segment are used to fasten and connect two steel box girder segments adjacent in the transverse direction through the connecting plate 6 and the high-strength bolt 7, so as to complete the on-site assembly of the steel beam;

[0041] S2, when disassembling and moving, the bridge superstructure and the bridge substructure are first disassembled, and then the original whole-span system is disassembled into a modular unit system. The car crane is used as the equipment for disassembling the steel box girder segment, and the large equipment truck of the open pit mine is used for transporting the disassembled steel box girder segment;

[0042] S3, when the disassembled steel box girder segment is transported to the bridge installation site of the new position, the structure of the steel box girder segment is detected and repaired, and the steel box girder segment can be used only after meeting the technical requirements for secondary use;

[0043] S4, the abutment and foundation work of the bridge installation of the new position should be done in advance, and the steel box girder segment is directly assembled by the car crane after the structure of the disassembled steel box girder segment is detected and qualified, so as to complete the moving and setting. Example 2

[0044] The steel box girder of the embodiment is composed of a plurality of steel boxes which are spliced by the connecting plate 6 and the high-strength bolt 7. Example 3

[0045] The movable modular steel box girder bridge of the embodiment comprises the steel box girder of example 2.

[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A steel box structure, characterized by, The closed box structure is formed by welding a top plate (1), a bottom plate (2), a web plate (3) and a transverse partition plate (4) and a reinforcing transverse rib (5), the transverse partition plate (4) and the reinforcing transverse rib (5) are alternately arranged along the bridge longitudinal direction in the box, U-shaped longitudinal stiffening ribs (11) and I-shaped longitudinal stiffening ribs (21) are respectively welded on the top plate (1) and the bottom plate (2) longitudinally, a plurality of splice plates (31) are arranged on the outer side of the web plate (3), and two adjacent steel box beam sections are connected by connecting plates (6) and high-strength bolts (7).

2. The steel box structure according to claim 1, wherein The top of the transverse partition plate (4) is provided with a mounting groove for mounting the U-shaped longitudinal stiffening rib, the bottom is provided with a through hole for passing the I-shaped longitudinal stiffening rib, and a manhole (41) for connecting the adjacent two steel boxes is further arranged on the transverse partition plate (4).

3. The steel box structure of claim 1, wherein The top of the reinforcing transverse rib (5) is provided with a mounting groove for mounting the U-shaped stiffening rib, a first reinforcing plate (51) is arranged below the mounting groove, the first reinforcing plate (51) is welded between the left and right web plates (3), a second reinforcing plate (52) for reinforcing the vertical plate of the reinforcing transverse rib (5) is further arranged below the first reinforcing plate (51), and the second reinforcing plate (52) is welded on the vertical plate and located inside the steel box.

4. The steel box structure of claim 3, wherein The web plate (3) is welded with a splice plate (31) and a support plate (32), and the splice plate (31) has bolt holes on the upper surface for connecting two steel box beam sections.

5. A steel box girder characterized by, The steel box structure is composed of the combination of claim 1.

6. A transportable modular steel box girder bridge, characterized in that, The steel box girder comprises the steel box structure of claim 5.

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