Steel box girder butt joint structure of steel structure bridge

Abstract

The utility model relates to the technical field of steel structure bridges, and discloses a steel box girder butt joint structure of a steel structure bridge, which comprises two steel box girders, each steel box girder comprises a top plate and a bottom plate, the top plate and the bottom plate have the same length, are parallel to each other and are partially overlapped, and two sides of the top plate are connected with webs. The ends, away from the top plate, of the two webs are connected to the bottom plate, the top plate and the bottom plate are provided with a plurality of top plate U-shaped ribs and a plurality of bottom plate stiffening ribs correspondingly, and the ends, close to each other, of the two steel box girders are matched with each other. The steel box girders are slowly put down, at the moment, the top plates on the steel box girders make contact with the top ends of the adjacent steel box girders, then butt joint of the steel box girders is achieved, the butt joint structure is adopted in the bridge construction process, the stability of the bridge is improved, the construction speed is high, and the construction period is short.

Description

Technical Field

[0001] The utility model patent relates to the technical field of steel structure bridges, and specifically, to a steel box girder butt joint structure of a steel structure bridge. Background Art

[0002] In recent years, steel structure bridges, especially steel box girder bridges, have played an indispensable role in transportation construction with their excellent spanning capacity and relatively short construction period. The construction method based on dividing the steel box girder into longitudinal sections and transverse blocks can well overcome the difficulties of construction restricted by the site, hoisting capacity, construction speed, etc., and achieve the purpose of fast and safe construction. Therefore, this method is often used in the construction of steel box girder bridges. The existing steel box girders of steel structure bridges are difficult to accurately dock when splicing, which makes their splicing more troublesome and reduces the construction efficiency of steel structure bridges. Utility Model Content

[0003] The utility model aims to provide a steel box girder butt joint structure for a steel structure bridge, aiming to solve the problem in the prior art that it is difficult to achieve accurate butt joint when the existing steel box girders of the steel structure bridge are spliced.

[0004] The utility model is implemented as follows: a steel box girder docking structure of a steel structure bridge comprises two steel box girders, wherein the steel box girder comprises a top plate and a bottom plate, the top plate and the bottom plate have the same length, are parallel to each other and partially overlap, webs are connected to both sides of the top plate, one end of the two webs away from the top plate is connected to the bottom plate, a plurality of top plate U-ribs and a plurality of bottom plate home ribs are respectively installed on the top plate and the bottom plate, and the ends of the two steel box girders close to each other fit each other.

[0005] Preferably, before the steel box girders are butt-jointed, the ends of the bridge need to be poured with concrete, and steel plates are used as temporary fixing points, thereby serving as temporary piers for the first section of the bridge.

[0006] Preferably, a temporary support needs to be set on the ground before the two steel box girders are butt-jointed.

[0007] Preferably, the temporary support needs to use a precision total station on the support platform to carry out mapping and positioning of the central axis and side lines of the bridge.

[0008] Preferably, a triangular steel plate is installed on the inner side of the temporary support.

[0009] Preferably, a jack is movably mounted on one of the top plates, and an L-shaped plate is welded to the top plate adjacent to the top plate, and the L-shaped plate is in contact with the jack.

[0010] Preferably, a 5T fall chain is installed on the steel box girder located at the uphill position of the bridge.

[0011] Preferably, a limiting horse plate is welded to one end of the top plate extending out of the steel box beam, and the other end of the limiting horse plate is welded to the top plate of the adjacent steel box beam.

[0012] Preferably, two connecting plates are connected between the two webs on the same steel box girder, the two connecting plates are respectively located at the two ends of the web, and a plurality of butt plates are installed on the two connecting plates, and the butt plates on the two connecting plates are cross-arranged.

[0013] Preferably, when the steel box girder is cut, its length and width directions increase by 3-5 mm and 1.5 mm respectively.

[0014] Compared with the prior art, the steel box girder docking structure of the steel structure bridge provided by the utility model requires that when the docking of two steel box girders is to be completed, one of the steel box girders is first hoisted to an appropriate position and lowered, and then the other steel box girder is hoisted to the end of the previous steel box girder, and the hoisted steel box girder is controlled to slowly drop down. During the dropping process, the position of the steel box girder is simultaneously corrected by the hoist. When the steel box girder drops to the point where its bottom surface contacts the bottom plate on the adjacent steel box girder, the steel box girder is slowly lowered. At this time, the top plate on the steel box girder contacts the top end of the adjacent steel box girder, thereby realizing the docking of the steel box girder. By adopting the docking structure during bridge construction, the stability of the bridge is improved, and the construction speed is fast and the construction period is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the steel box girder butt joint structure of the steel structure bridge provided by the utility model;

[0016] Figure 2 It is a side view cross-sectional structural schematic diagram of a steel box girder butt joint structure of a steel structure bridge provided by the utility model;

[0017] Figure 3 It is a structural schematic diagram of two steel box girders butted against each other in a steel structure bridge provided by the utility model;

[0018] Figure 4 The utility model is a schematic diagram of a top view cross-sectional structure of a steel box girder butt joint structure of a steel structure bridge provided by the utility model.

[0019] Description of reference numerals:

[0020] 1. Steel box girder; 2. Top plate; 3. Bottom plate; 4. Top plate U-rib; 5. Bottom plate reinforcement rib; 6. Temporary support; 7. Triangular steel plate; 8. Limiting horse plate; 9. Jack; 10. L-shaped plate; 11. Web plate; 12. Connecting plate 13. Butt plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0023] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Reference Figure 1-4 As shown, it is a preferred embodiment provided by the utility model.

[0025] The steel box girder docking structure of the steel structure bridge includes two steel box girders 1, and the steel box girder 1 includes a top plate 2 and a bottom plate 3. The top plate 2 and the bottom plate 3 have the same length, are parallel to each other and partially overlap, and webs 11 are connected to both sides of the top plate 2. The ends of the two webs 11 away from the top plate 2 are connected to the bottom plate 3. A plurality of top plate U ribs 4 and a plurality of bottom plate home ribs 5 are respectively installed on the top plate 2 and the bottom plate 3, and the ends of the two steel box girders 1 close to each other fit together.

[0026] When it is necessary to complete the docking of two steel box girders 1, one of the steel box girders 1 is first hoisted to an appropriate position and lowered, and then the other steel box girder 1 is hoisted to the end of the previous steel box girder 1, and the hoisted steel box girder 1 is controlled to slowly fall. During the falling process, the position of the steel box girder 1 is simultaneously corrected by the hoist. When the steel box girder 1 falls to the point where its bottom surface contacts the bottom plate 3 on the adjacent steel box girder 1, the steel box girder 1 is slowly lowered. At this time, the top plate on the steel box girder 1 contacts the top of the adjacent steel box girder 1, thereby achieving the docking of the steel box girder 1. By adopting this docking structure during bridge construction, the stability of the bridge is improved, and the construction speed is fast and the construction period is short.

[0027] Specifically, in this embodiment, before the steel box girder 1 is butt-jointed, the bridge ends need to be poured with concrete, and steel plates are used as temporary fixing points, thereby serving as temporary piers for the first section of the bridge.

[0028] The provision of temporary piers facilitates the installation and docking of the steel box girder 1 of the bridge in the later stage.

[0029] Specifically, in this embodiment, a temporary support 6 needs to be set on the ground before the two steel box girders 1 are butt-jointed.

[0030] By setting up the temporary support 6, support is provided for the steel box girder 1, and the steel box girder 1 is placed in the position where the bridge should be, so as to prepare for the subsequent docking of the steel box girder 1.

[0031] Specifically, in this embodiment, a precise total station is required on the temporary support 6 to carry out surveying and positioning of the central axis and side lines of the bridge on the support platform.

[0032] By mapping the center axis and side lines of the bridge, a plane control network can be established to facilitate the calculation of detailed data when the steel box girder 1 is connected.

[0033] Specifically, in this embodiment, a triangular steel plate 7 is installed on the inner side of the temporary bracket 6 .

[0034] When the steel box girder 1 is located on the temporary support 6 , the triangular steel plate 7 is in contact with the steel box girder 1 , thereby blocking the steel box girder 1 and preventing the steel box girder 1 from lateral displacement.

[0035] Specifically, in this embodiment, a jack 9 is movably mounted on one of the top plates 2 , and an L-shaped plate 10 is welded to the top plate 2 adjacent to the top plate 2 , and the L-shaped plate 10 is in contact with the jack 9 .

[0036] When two steel box girders 1 have been butt-jointed but not neatly, the steel box girders 1 can be fine-tuned by using a jack 9 to move down one end of the L-shaped plate 10 in contact with the top plate 2 so that the two adjacent steel box girders 1 can remain flat.

[0037] Specifically, in this embodiment, a 5T fall chain is installed on the steel box girder 1 located at the uphill position of the bridge.

[0038] When the steel box girder 1 generates a longitudinal thrust in the direction of the bridge, the 5T fall chain can be used to tighten the steel box girder 1 upward, thereby preventing the steel box girder 1 from shifting.

[0039] Specifically, in this embodiment, a limiting horse plate 8 is welded to one end of the top plate 2 extending out of the steel box girder 1 , and the other end of the limiting horse plate 8 is welded to the top plate 2 of the adjacent steel box girder 1 .

[0040] By setting the limiting horse plate 8, two adjacent top plates 2 can be connected by the limiting horse plate 8, thereby avoiding the situation that the top plates 2 move and cause the steel box beams 1 to be unevenly connected.

[0041] Specifically, in this embodiment, two connecting plates 12 are connected between the two webs 11 on the same steel box girder 1, the two connecting plates 12 are respectively located at the two ends of the web 11, and a plurality of docking plates 13 are installed on the two connecting plates 12, and the docking plates 13 on the two connecting plates 12 are cross-arranged.

[0042] By providing the connection plate 12, the two steel box girders 1 can be engaged with each other via the butt joint plates 13 on the connection plate 12, and then the adjacent butt joint plates 13 are welded, thereby further improving the stability of the butt joint structure.

[0043] Specifically, in this embodiment, when the steel box girder 1 is cut, its length and width directions increase by 3-5 mm and 1.5 mm respectively.

[0044] Since the steel box girder 1 will produce longitudinal and transverse deformation during welding, its longitudinal contraction during welding is 3-5 mm and its transverse deformation is 1.5 mm. The accuracy of the steel box girder 1 is ensured by increasing the corresponding dimensions of the steel box girder 1.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The steel box girder butt joint structure of the steel structure bridge comprises two steel box girders, characterized in that: The steel box girder comprises a top plate and a bottom plate, the top plate and the bottom plate have the same length, are parallel to each other and partially overlap, web plates are connected to both sides of the top plate, the ends of the two web plates away from the top plate are connected to the bottom plate, a number of top plate U-ribs and a number of bottom plate home ribs are respectively installed on the top plate and the bottom plate, and the ends of the two steel box girders close to each other fit together.

2. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: Before the steel box girders are butt-jointed, the ends of the bridge need to be poured with concrete, and steel plates are used as temporary fixing points, thereby serving as temporary piers for the first section of the bridge.

3. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: Before the two steel box girders are butt-jointed, a temporary support needs to be set up on the ground.

4. The steel box girder butt joint structure of a steel structure bridge according to claim 3, characterized in that: The temporary support needs to use a precision total station on the support platform to carry out mapping and positioning of the central axis and side lines of the bridge.

5. The steel box girder butt joint structure of a steel structure bridge according to claim 4, characterized in that: A triangular steel plate is installed on the inner side of the temporary support.

6. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: A jack is movably mounted on one of the top plates, and an L-shaped plate is welded to the top plate adjacent to the top plate, and the L-shaped plate is in contact with the jack.

7. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: A 5T fall chain is installed on the steel box girder located at the uphill position of the bridge.

8. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: A limiting horse plate is welded on one end of the top plate extending out of the steel box beam, and the other end of the limiting horse plate is welded on the top plate of the adjacent steel box beam.

9. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: Two connecting plates are connected between the two webs on the same steel box girder. The two connecting plates are respectively located at the two ends of the web, and a plurality of butt joint plates are installed on the two connecting plates. The butt joint plates on the two connecting plates are cross-arranged.

10. The steel box girder butt joint structure of a steel structure bridge according to claim 1, characterized in that: When the steel box girder is cut, its length and width directions increase by 3-5 mm and 1.5 mm respectively.

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