Steel box girder structure capable of preventing deformation of top plate

Abstract

A steel box girder structure capable of preventing top plate deformation comprises a U-shaped frame and a top plate body, U-shaped reinforcing ribs formed by transverse partition plates and longitudinal partition plates are fixedly arranged on the inner wall of the U-shaped frame, a plurality of transverse reinforcing rods are fixedly arranged at the bottom of the top plate body, and the transverse reinforcing rods are fixedly connected with the U-shaped reinforcing ribs; the transverse reinforcing rods are fixedly arranged on the top plate in advance to resist transverse shrinkage deformation after the top plate is welded, the transverse reinforcing rods are fixedly connected with the U-shaped reinforcing ribs, and the longitudinal reinforcing rods fixedly connected with the top plate are arranged to resist longitudinal shrinkage deformation after the top plate is welded, so that the stability of the top plate after welding is guaranteed; and while transverse and longitudinal contraction deformation is offset, complex early-stage work such as welding parameter selection and inspection is omitted in the early stage of welding, the production efficiency is improved, and the construction period is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of steel box girder manufacturing, and in particular to a steel box girder structure capable of preventing top plate deformation. Background Art

[0002] Steel box girder, also known as steel plate box girder, is a common structural form in long-span bridge projects. It is usually used for bridges with larger spans. Its shape is like a box, hence the name. The structure of the steel box girder consists of a fully welded top plate, bottom plate, web plate, transverse diaphragm, longitudinal diaphragm and stiffening ribs.

[0003] The welding process of steel box girders usually involves welding the bottom plate and web of the steel box girder to form a U-shaped frame structure, then welding the transverse and longitudinal diaphragms to form a U-shaped reinforcement structure, and finally welding the top plate on the top of the U-shaped frame. When welding the top plate, the top plate unit will produce large lateral and longitudinal shrinkage deformations. The control methods for this shrinkage deformation include: determining the optimal groove form, welding parameters and welding materials through welding process assessment tests; selecting a suitable welding method, controlling welding heat input, and appropriately reducing the preheating temperature and interlayer temperature. These methods usually require a lot of preliminary inspections and preparations, which takes a long time to weld the top plate and extends the construction period.

[0004] Therefore, it is necessary for the inventor to design a new steel box girder structure for preventing top plate deformation to overcome the above problems. Summary of the invention

[0005] The main purpose of the present application is to provide a steel box girder structure that prevents top plate deformation, so as to solve the problem of long preliminary preparation time for welding the top plate of the steel box girder in the related art.

[0006] In order to achieve the above-mentioned purpose, the present application provides a steel box girder structure for preventing top plate deformation, including a U-shaped frame and a top plate body, the inner wall of the U-shaped frame is fixedly provided with U-shaped reinforcement ribs formed by transverse partitions and longitudinal partitions, and the bottom of the top plate body is fixedly provided with a plurality of transverse reinforcement rods, and the transverse reinforcement rods are fixedly connected to the U-shaped reinforcement ribs.

[0007] Preferably, a slot is provided at the top of the U-shaped reinforcing rib, and the transverse reinforcing rod is fixedly inserted in the slot and fixedly connected to the U-shaped reinforcing rib.

[0008] Preferably, the transverse reinforcing rod is fixedly connected to the bottom of the top plate body by welding.

[0009] Preferably, a plurality of strip welding points are fixedly provided between the tops of both sides of the transverse reinforcing rod and the top plate body.

[0010] Preferably, a longitudinal anti-deformation structure is also fixedly provided on the top plate body.

[0011] Preferably, the longitudinal anti-deformation structure includes a plurality of longitudinal reinforcing rods, and the longitudinal reinforcing rods are fixedly arranged between adjacent transverse reinforcing rods and fixedly connected to the bottom of the top plate body.

[0012] Preferably, the longitudinal reinforcing rod is fixedly connected to the top plate body by welding.

[0013] Preferably, the longitudinal reinforcing rod is integrally formed with the top plate body.

[0014] Preferably, the longitudinal reinforcement bars on the left and right sides of each transverse reinforcement bar are arranged alternately.

[0015] Preferably, the transverse reinforcing rod is integrally formed with the top plate body.

[0016] The utility model provides a steel box girder structure for preventing top plate deformation, which has the following beneficial effects compared with the prior art:

[0017] By pre-fixing transverse reinforcement rods on the top plate, the transverse shrinkage deformation after welding the top plate can be resisted, and by fixedly connecting the transverse reinforcement rods with the U-shaped reinforcement ribs and providing longitudinal reinforcement rods fixedly connected to the top plate, the longitudinal shrinkage deformation after welding of the top plate can be resisted, thereby ensuring the stability of the top plate after welding. While offsetting the transverse and longitudinal shrinkage deformation, the complex preliminary work such as selecting welding parameters and inspecting them in the early stage of welding is eliminated, thereby improving production efficiency and shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0019] Figure 1 It is the overall structure diagram of the utility model;

[0020] Figure 2 It is an exploded view of the utility model;

[0021] Figure 3 It is a structural diagram of the top plate body of the utility model.

[0022] Among them: 1. U-shaped frame; 2. Top plate body; 3. U-shaped reinforcement ribs; 4. Horizontal reinforcement rods; 5. Slots; 6. Strip welding points; 7. Longitudinal reinforcement rods. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0027] In addition, the term "plurality" shall mean two or more.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] like Figures 1 to 3As shown, a steel box girder structure for preventing top plate deformation comprises a U-shaped frame 1 and a top plate body 2, wherein the inner wall of the U-shaped frame 1 is fixedly provided with a U-shaped stiffener 3 formed by a transverse partition and a longitudinal partition, and the bottom of the top plate body 2 is fixedly provided with a plurality of transverse stiffeners 4, and the transverse stiffeners 4 are fixedly connected to the U-shaped stiffener 3; a clamping groove 5 is opened on the top of the U-shaped stiffener 3, and the transverse stiffener 4 is fixedly inserted in the clamping groove 5 and fixedly connected to the U-shaped stiffener 3; during operation, before assembling and welding the top plate body 2 on the U-shaped frame 1 composed of a bottom plate and a web plate, the transverse partition and the longitudinal partition are respectively welded to the bottom plate and the web plate to form the U-shaped stiffener 3, and then the transverse stiffener 4 is fixedly connected to the top plate body 2 in advance, and the transverse stiffener 4 can effectively strengthen the transverse contraction of the top plate body 2, and before welding the top plate, the transverse stiffener 4 is docked in the clamping groove 5, so that when the top plate body 2 undergoes longitudinal contraction after welding, it will be blocked by the U-shaped stiffener 3 to offset its longitudinal contraction. By pre-fixing the transverse reinforcing rod 4 on the top plate, the transverse shrinkage deformation after the top plate is resisted, and by fixing the transverse reinforcing rod 4 to the U-shaped reinforcing rib 3 and setting the longitudinal reinforcing rod 7 fixedly connected to the top plate, the longitudinal shrinkage deformation after the top plate is resisted, thereby ensuring the stability of the top plate after welding. While offsetting the transverse and longitudinal shrinkage deformation, the complex preliminary work of selecting welding parameters and testing in the early stage of welding is eliminated, thereby improving production efficiency and shortening the construction period.

[0030] The transverse reinforcing rod 4 is fixedly connected to the bottom of the top plate body 2 by welding; or the transverse reinforcing rod 4 is integrally formed with the top plate body 2. Whether the transverse reinforcing rod 4 is welded or integrally formed with the top plate body 2, it can have a certain ability to resist transverse shrinkage and ensure the stability of the top plate welding. However, welding is relatively troublesome compared to integral molding, but it saves the cost of opening a mold.

[0031] A plurality of strip welding points 6 are fixedly arranged between the top of both sides of the transverse reinforcing rod 4 and the top plate body 2; during operation, when the transverse reinforcing rod 4 and the top plate body 2 are welded and connected, spot welding can be used for connection, and the effect of transverse shrinkage is relatively smaller than that of longitudinal shrinkage, and electric welding can meet the effect of resisting transverse shrinkage while reducing solder loss.

[0032] A longitudinal anti-deformation structure is also fixedly arranged on the top plate body 2; the longitudinal anti-deformation structure includes a plurality of longitudinal reinforcing rods 7, and the longitudinal reinforcing rods 7 are fixedly arranged between the adjacent transverse reinforcing rods 4 and fixedly connected to the bottom of the top plate body 2; during operation, in addition to preventing longitudinal shrinkage by the cooperation between the card slot 5 and the transverse reinforcing rod 4, the longitudinal reinforcing rod 7 can also be fixedly arranged before the top plate body 2 is welded, and the longitudinal reinforcing rod 7 and the top plate body 2 are fixedly connected by welding or integral molding; the effect of offsetting the longitudinal shrinkage can be achieved by the rigidity of the longitudinal reinforcing rod 7 itself.

[0033] The longitudinal reinforcing rods 7 on the left and right sides of each transverse reinforcing rod 4 are arranged alternately; when working, the staggered longitudinal reinforcing rods 7 make its ability to resist longitudinal contraction more uniform, and the effect of resisting longitudinal contraction is better.

[0034] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel box girder structure for preventing top plate deformation, characterized in that: The invention comprises a U-shaped frame (1) and a top plate body (2), wherein the inner wall of the U-shaped frame (1) is fixedly provided with a U-shaped reinforcing rib (3) formed by a transverse partition and a longitudinal partition, and the bottom of the top plate body (2) is fixedly provided with a plurality of transverse reinforcing rods (4), and the transverse reinforcing rods (4) are fixedly connected to the U-shaped reinforcing rib (3).

2. A steel box girder structure for preventing top plate deformation according to claim 1, characterized in that: A slot (5) is provided on the top of the U-shaped reinforcing rib (3), and the transverse reinforcing rod (4) is fixedly inserted into the slot (5) and fixedly connected to the U-shaped reinforcing rib (3).

3. The steel box girder structure for preventing top plate deformation according to claim 1, characterized in that: The transverse reinforcing rod (4) is fixedly connected to the bottom of the top plate body (2) by welding.

4. A steel box girder structure for preventing top plate deformation as claimed in claim 3, characterized in that: A plurality of strip-shaped welding points (6) are fixedly arranged between the tops of both sides of the transverse reinforcing rod (4) and the top plate body (2).

5. The steel box girder structure for preventing top plate deformation according to claim 1, characterized in that: A longitudinal anti-deformation structure is also fixedly arranged on the top plate body (2).

6. A steel box girder structure for preventing top plate deformation as claimed in claim 5, characterized in that: The longitudinal anti-deformation structure comprises a plurality of longitudinal reinforcing rods (7), wherein the longitudinal reinforcing rods (7) are fixedly arranged between adjacent transverse reinforcing rods (4) and fixedly connected to the bottom of the top plate body (2).

7. A steel box girder structure for preventing top plate deformation according to claim 6, characterized in that: The longitudinal reinforcing rod (7) and the top plate body (2) are fixedly connected by welding.

8. The steel box girder structure for preventing top plate deformation according to claim 6, characterized in that: The longitudinal reinforcing rod (7) is integrally formed with the top plate body (2).

9. The steel box girder structure for preventing top plate deformation according to claim 6, characterized in that: The longitudinal reinforcing bars (7) on the left and right sides of each transverse reinforcing bar (4) are arranged alternately.

10. The steel box girder structure for preventing top plate deformation according to claim 1, characterized in that: The transverse reinforcing rod (4) and the top plate body (2) are formed integrally.

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