Reversible deformation adjusting device for steel box girder plate unit

Abstract

The utility model belongs to the technical field of auxiliary equipment for steel box girder processing, and particularly discloses a steel box girder plate unit anti-deformation adjusting device which comprises a plurality of deformation adjusting bases which are arranged oppositely and parallelly at intervals, and the upper end face of each deformation adjusting base is detachably connected with a half-moon-shaped plate bottom plate. Half-moon-shaped plates with different heights are fixedly connected to the upper end faces of the corresponding half-moon-shaped plate bottom plates on the different deformation adjusting bases, the half-moon-shaped plates are perpendicularly connected with the corresponding half-moon-shaped plate bottom plates, and the arc-shaped ends of the half-moon-shaped plates face upwards. The utility model aims to improve the construction efficiency and save the construction cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary equipment for steel box girder processing, and particularly relates to an anti-deformation adjusting device for steel box girder plate units. Background Technique

[0002] In the field of bridge construction, as a bridge structure form with great advantages, the steel box girder is widely used in various bridge projects because of its light self-weight, high strength, convenient construction, simple structure, and easy installation, etc., which can significantly shorten the construction period and reduce the project cost. The manufacturing process of the steel box girder involves multiple key steps, among which the production of plate units such as the top plate, bottom plate, web plate, and diaphragm plate is particularly crucial. The quality and precision of these plate units directly affect the structural performance and service life of the entire steel box girder. During the production process of the steel box girder plate unit, due to the different elevations and complex and variable linear shapes at each position, extremely high requirements are put forward for the elevation of the control points of the plate unit. Especially in the welding stage of the plate unit, due to the thermal stress and residual stress generated during the welding process, the plate unit often undergoes large deformations, which not only affect the geometric dimension accuracy of the component but also may have an adverse impact on the overall linear shape of the bridge. To overcome this problem, pre-deformation treatment is carried out on the plate unit through an anti-deformation jig before welding to offset the welding deformation.

[0003] However, the existing anti-deformation jig design has obvious limitations. Due to the significant differences in the geometric dimensions and linear shapes of different steel box girders, it is necessary to readjust the elevation of the anti-deformation jig every time a new steel box girder is processed. Especially for the crescent plate part on the anti-deformation jig, the elevation adjustment is particularly cumbersome. The usual method is to adjust the height by cutting off the crescent plate part and welding a new crescent plate again. This method not only has low efficiency and increases the manufacturing cost, but also the material properties of the crescent plate will gradually decline after multiple cutting and welding, making it difficult to meet the strength and safety requirements, and finally having to be scrapped and replaced. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the utility model provides an anti-deformation adjusting device for steel box girder plate units, and its purpose is to improve the construction efficiency and save the construction cost.

[0005] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] An anti-deformation adjusting device for steel box girder plate units includes a number of deformation adjusting bases that are arranged opposite, parallel, and at intervals. A semi-circular plate bottom plate is detachably connected to the upper end surface of each deformation adjusting base. Semi-circular plates with different heights are fixedly connected to the upper end surfaces of the corresponding semi-circular plate bottom plates on different deformation adjusting bases. The semi-circular plate is vertically connected to the corresponding semi-circular plate bottom plate, and the arc end of the semi-circular plate faces upward.

[0007] Further, a plurality of first threaded holes are formed in the upper end surface of each of the deformation adjustment bases, and a plurality of second threaded holes corresponding to the first threaded holes are formed in the bottom plate of each semi-circular plate. The deformation adjustment base and the corresponding bottom plate of the semi-circular plate are detachably connected by inserting connecting bolts into the second threaded holes and their corresponding first threaded holes.

[0008] Further, a plurality of stiffening plates are arranged between the two side surfaces of the semi-circular plate and the corresponding bottom plate of the semi-circular plate.

[0009] Further, the stiffening plates are fixedly connected to the side surface of the semi-circular plate and the upper end surface of the bottom plate of the semi-circular plate by welding.

[0010] Further, a hoisting hole is formed through the side wall of each semi-circular plate.

[0011] Further, the hoisting holes are symmetrically arranged with respect to the center position of the semi-circular plate.

[0012] Further, the bottom plate of each semi-circular plate matches the upper end surface of the corresponding deformation adjustment base, and each semi-circular plate is located at the central axis position of the corresponding bottom plate of the semi-circular plate.

[0013] Further, the semi-circular plate and the corresponding bottom plate of the semi-circular plate are fixedly connected by welding.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] A steel box girder plate unit anti-deformation adjustment device provided by the utility model connects the bottom plate of the semi-circular plate and the upper end surface of the corresponding deformation adjustment base in a detachable manner. The semi-circular plate is fixedly connected to the corresponding bottom plate of the semi-circular plate, and the heights of the semi-circular plates fixedly connected to the upper end surfaces of the corresponding bottom plates of different deformation adjustment bases are different. Therefore, according to the geometric dimensions and linear requirements of the steel box girder plate unit to be adjusted, the bottom plates of the semi-circular plates corresponding to the semi-circular plates with different heights can be quickly exchanged with the deformation adjustment bases flexibly and conveniently, so as to realize the control of the anti-deformation lines of different steel box girder plate units, and the accuracy can reach the millimeter level. The utility model can be flexibly adjusted to adapt to the geometric dimensions and linear requirements of different steel box girders, that is, it can be adapted to the anti-deformation adjustment of different steel box girder plate units, has strong applicability, improves the construction efficiency, saves the construction cost, eliminates the need for multiple cutting and welding operations, and ensures the construction safety and component quality at the same time, providing a more efficient, economical and reliable solution for the manufacture of steel box girders.

[0016] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following provides preferred embodiments in conjunction with the accompanying drawings and elaborates as follows. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the specific embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the usage state of an anti-deformation adjustment device for a steel box girder plate unit of the present utility model;

[0019] Figure 2 It is a schematic diagram of a deformation adjustment unit in an anti-deformation adjustment device for a steel box girder plate unit of the present utility model;

[0020] Figure 3 It is a schematic diagram of the components of a deformation adjustment unit in an anti-deformation adjustment device for a steel box girder plate unit of the present utility model.

[0021] In the figure: 1 - Deformation adjustment base; 100 - First threaded hole; 2 - Semi-circular plate bottom plate; 200 - Second threaded hole; 3 - Semi-circular plate; 300 - Lifting hole; 4 - Connecting bolt; 5 - Stiffening plate; 6 - Steel box girder plate unit. Specific Embodiments

[0022] To make the purposes, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0023] Combined with Figure 1 and Figure 2As shown in the figure, the embodiment of the present utility model provides a device for adjusting the reverse deformation of steel box girder plate units, aiming to achieve efficient and flexible adjustment of the reverse deformation of steel box girder plate units through modular design, so as to meet the manufacturing requirements of different steel box girder plate units, improve construction efficiency, and save construction costs. The device for adjusting the reverse deformation of steel box girder plate units includes a number of deformation adjustment bases 1 that are arranged parallel and spaced apart from each other. On the upper end surface of each deformation adjustment base 1, a semi-circular plate bottom plate 2 is detachably connected. On the upper end surfaces of the corresponding semi-circular plate bottom plates 2 on different deformation adjustment bases 1, semi-circular plates 3 with different heights are fixedly connected. The semi-circular plates 3 are perpendicularly connected to the corresponding semi-circular plate bottom plates 2, and the arc ends of the semi-circular plates 3 face upward.

[0024] Specifically, these deformation adjustment bases 1 serve as the basic support part of the device, and their quantity, spacing, and layout can be flexibly adjusted according to the size and shape of the actual steel box girder plate unit 6.

[0025] On the upper end surface of each deformation adjustment base 1, a connection structure adapted to the semi-circular plate bottom plate 2 is designed, such as bolt holes, card slots, or magnetic suction devices, etc., to achieve the detachable connection between the semi-circular plate bottom plate 2 and the deformation adjustment base 1. This design enables the semi-circular plate bottom plate 2 to be conveniently replaced or adjusted in position between different deformation adjustment bases 1 to meet different reverse deformation requirements.

[0026] The semi-circular plate 3 is fixedly connected to the upper end surface of the corresponding semi-circular plate bottom plate 2, and the two are perpendicularly connected to ensure the stability of the semi-circular plate 3. The arc end of the semi-circular plate 3 faces upward, forming a reverse deformation surface opposite to the welding deformation trend of the steel box girder plate unit 6. It should be understood that the semi-circular plates 3 on different deformation adjustment bases 1 have different heights, which are achieved by precisely calculating and customizing semi-circular plates with different heights during the design stage. This setting of height difference aims to accurately compensate for the different deformation amounts that the steel box girder plate unit 6 may generate at different positions.

[0027] In this utility model, the bottom plate 2 of the semi-circular plate is connected to the upper end surface of the corresponding deformation adjustment base 1 in a detachable manner. The semi-circular plate 3 is fixedly connected to the corresponding bottom plate 2 of the semi-circular plate. Moreover, the heights of the semi-circular plates 3 fixedly connected to the upper end surfaces of the corresponding bottom plates 2 of different deformation adjustment bases 1 are different. Therefore, according to the geometric dimensions and linear requirements of the steel box girder plate unit to be adjusted, the bottom plates 2 of the semi-circular plates 3 with different heights can be quickly exchanged with the deformation adjustment bases 1 flexibly and conveniently, thereby realizing the control of the reverse deformation line types of different steel box girder plate units, and the accuracy can reach the millimeter level. The reverse deformation adjustment device for the steel box girder plate unit of this utility model can be flexibly adjusted to adapt to the geometric dimensions and linear requirements of different steel box girders, that is, it can adapt to the reverse deformation adjustment of different steel box girder plate units, has strong applicability, improves the construction efficiency, saves the construction cost, eliminates the need for multiple cutting and welding operations, and at the same time ensures the construction safety and component quality, providing a more efficient, economical and reliable solution for the manufacture of steel box girders.

[0028] Exemplarily, according to the geometric dimensions, linear type and welding process requirements of the steel box girder plate unit 6, determine the quantity, spacing of the required deformation adjustment bases 1 and the height of the semi-circular plate 3. Place the deformation adjustment bases 1 in the predetermined layout, and install the bottom plate 2 of the semi-circular plate connected with the semi-circular plate 3 on the deformation adjustment base 1 through bolts, card slots or other connecting parts. Place the steel box girder plate unit 6 to be processed on the assembled reverse deformation adjustment device, check and adjust each part to ensure the close fit between the steel box girder plate unit 6 and the semi-circular plate 3, and realize the precise compensation of the reverse deformation. With the support of the reverse deformation adjustment device, carry out the welding operation on the steel box girder plate unit 6. Due to the existence of the reverse deformation adjustment device, the deformation generated during the welding process will be effectively offset, thereby ensuring the geometric dimension accuracy and overall linear type of the steel box girder plate unit 6. After welding is completed, remove the steel box girder plate unit 6 from the reverse deformation adjustment device. Through the above specific implementation manners, the reverse deformation adjustment device for the steel box girder plate unit of this utility model realizes the efficient and flexible reverse deformation adjustment function, not only improves the manufacturing precision and efficiency of the steel box girder plate unit, but also reduces the production cost and material waste.

[0029] In an implementable manner, as shown in FIG. 3, a plurality of first threaded holes 100 are opened on the upper end surface of each deformation adjustment base 1, and a plurality of second threaded holes 200 corresponding to the first threaded holes 100 are opened on each bottom plate 2 of the semi-circular plate. The detachable connection between the deformation adjustment base 1 and the corresponding bottom plate 2 of the semi-circular plate is realized by inserting a connecting bolt 4 into the second threaded hole 200 and its corresponding first threaded hole 100.

[0030] Specifically, a number of first threaded holes 100 are pre-designed and opened on the upper end surface of each deformation adjustment base 1. The position and number of the first threaded holes 100 need to be arranged according to the size, weight and expected stress conditions of the meniscus plate bottom plate 2 to ensure the stability and reliability of the connection. At the same time, the bottom of each meniscus plate bottom plate 2 is also correspondingly provided with a second threaded hole 200 corresponding to the first threaded hole 100. The position, aperture and depth of the second threaded hole 200 need to match the first threaded hole 100 so that the subsequent connecting bolts 4 can be smoothly inserted and tightened. When making a detachable connection, first place the deformation adjustment base 1 in an appropriate position according to a predetermined layout. Subsequently, place the meniscus plate bottom plate 2 on the upper end surface of the deformation adjustment base 1, and ensure that the second threaded hole 200 is aligned with the first threaded hole 100. Next, use the connecting bolts 4 (usually high-strength bolts or screws) to penetrate the second threaded holes 200 one by one, and rotate the bolts until they are completely inserted into and tightened in the first threaded holes 100, and complete the tightening of all the connecting bolts 4 in sequence. In actual use, the meniscus plate bottom plate 2 and the meniscus plate 3 can be disassembled or replaced at any time as needed to meet the production requirements of different steel box girder plate units. When disassembling, just rotate the connecting bolts 4 in the opposite direction and take them out one by one. Through the above-mentioned embodiment, the anti-deformation adjustment device of the steel box girder plate unit in the utility model not only realizes the detachable connection between the deformation adjustment base 1 and the meniscus plate bottom plate 2, but also improves the flexibility and convenience of the device, providing operational convenience for the production of steel box girder plate units.

[0031] As a more preferred embodiment, Figure 2 and Figure 3 As shown, a plurality of stiffening plates 5 are arranged between the two side surfaces of the meniscus plate 3 and the corresponding meniscus plate bottom plate 2. The main function of these stiffening plates 5 is to enhance the strength and rigidity of the structure and prevent the meniscus plate 3 from being deformed due to external forces. It should be understood that the plurality of stiffening plates 5 are distributed between the two side surfaces and the bottom plate at a certain interval to form a stable support system.

[0032] Specifically, by adding additional support points, the stiffening plate 5 can significantly improve the bearing capacity of the structure and prevent damage caused by overload. At the same time, the stiffening plate 5 can also effectively reduce the deformation of the structure when it is subjected to force, and maintain the stability and accuracy of the structure. A reasonable layout of the stiffening plate 5 can guide the stress flow, making the stress distribution inside the structure more uniform, and avoiding damage caused by local stress concentration. In summary, the stiffening plate 5 not only improves the bearing capacity and stiffness of the device, but also optimizes the stress distribution, providing a strong guarantee for the stability and safety of the steel box girder structure.

[0033] Preferably, the stiffening plate 5 is fixedly connected to the side surface of the semi-circular plate 3 and the upper end surface of the semi-circular plate bottom plate 2 by welding. Welding connection has high strength and can withstand large loads without being easily damaged, which can significantly improve the structural integrity of the entire device and make it more stable.

[0034] In an implementable manner, in combination with Figure 2 and Figure 3 as shown, a lifting hole 300 is formed through the side wall of each semi-circular plate 3. The main function of the lifting hole 300 is to provide a connection point for lifting operations. By threading a lifting rope or chain through the lifting hole 300, it is convenient to use a crane or other lifting equipment to lift and move the semi-circular plate 3, thus simplifying the construction and installation process. The existence of the lifting hole 300 makes the installation and disassembly of the semi-circular plate 3 faster and more efficient. Construction workers can quickly position these components to the predetermined positions and precisely install them through the lifting equipment, thereby saving time and labor costs.

[0035] Preferably, the lifting holes 300 are symmetrically arranged with respect to the center position of the semi-circular plate 3. The symmetrical arrangement of the lifting holes 300 can ensure that the forces received by the semi-circular plate 3 during the lifting process are evenly distributed, thus avoiding tilting caused by uneven forces. The symmetrical layout of the lifting holes 300 makes the semi-circular plate 3 more stable during lifting, reduces potential safety hazards caused by shaking or swinging, and is conducive to docking and installation with the deformation adjustment base 1.

[0036] In an implementable manner, the upper end surface of each semi-circular plate bottom plate 2 matches the upper end surface of the corresponding deformation adjustment base 1, and each semi-circular plate 3 is located at the central axis position of the corresponding semi-circular plate bottom plate 2.

[0037] That is to say, the upper end surface of each semi-circular plate bottom plate 2 is designed to match the upper end surface of the corresponding deformation adjustment base 1, and this matching relationship refers to the mutual adaptation in terms of shape to ensure that the two can be closely connected and jointly bear and transmit loads. Each semi-circular plate 3 is located at the central axis position of the corresponding semi-circular plate bottom plate 2. The semi-circular plate 3 located at the central axis position can more evenly bear the forces and deformations from all directions, thereby reducing the local stress concentration on the semi-circular plate bottom plate 2 and the deformation adjustment base 1 and improving the overall load-bearing capacity of the device.

[0038] Preferably, the semi-circular plate 3 and the corresponding semi-circular plate bottom plate 2 are fixedly connected by welding. The welded fixed connection forms an integral structure between the semi-circular plate 3 and the semi-circular plate bottom plate 2, enhancing the overall stability and load-bearing capacity of the device. Since the welded connection does not require additional connecting parts, the structural layout of the device can be optimized, reducing unnecessary weight and space occupation.

[0039] In one embodiment, the deformation adjustment base 1 is made of a hot-rolled H-beam HN400*200*8*13 with a length of 4500 mm. The diameter of the first threaded hole 100 opened on the upper flange is 24 mm, and the spacing in the X direction is 5*800 mm, and the spacing in the Y direction is 100 mm, which are symmetrically arranged. The thickness of the semi-circular plate bottom plate 2 is 20 mm, the length is 4300 mm, and the width is 200 mm. A second threaded hole 200 matching the first threaded hole 100 on the deformation adjustment base 1 is opened. The size of the semi-circular plate 3 is 20*150 - 200*4300 mm. The height of the semi-circular plate 3 includes several types such as 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, and 200 mm. Two lifting holes 300 with a diameter of 50 mm are opened at 1 / 3 of the width and 1 / 2 of the height of the semi-circular plate 3. According to the previous experiments, for different steel box girder plate unit steel plate thicknesses, widths, and the specifications of I (U) ribs, before the steel box girder plate unit is welded on the jig, the assembled semi-circular plates 3 with different heights are replaced to make the reverse deformation height of the plate unit reach the designed preset height and meet the reverse deformation requirements. After welding, the plate unit is basically flat and can enter the overall assembly process after minor correction. The diameter of the connecting bolt 4 is 22 mm and the length is 70 mm. The sizes of the stiffening plates 5 include 10*80*80 mm, 10*80*120 mm, and 10*80*150 mm.

[0040] The steel box girder plate unit reverse deformation adjustment device of the present utility model saves labor. In the traditional method, 3 - 4 people are required to perform two processes of welding and correcting the plate unit. By using the steel box girder plate unit reverse deformation adjustment device of the present utility model, the plate unit welding does not require correction or only needs minor correction to enter the overall assembly process, and only 2 people are needed to complete it.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present utility model, unless otherwise clearly defined or limited, terms such as "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0046] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions recorded in the foregoing embodiments, or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A reverse deformation adjustment device for steel box girder plate units, characterized in that, It includes a number of deformable adjustment bases (1) that are parallel and spaced apart from each other. A semi-circular plate bottom plate (2) is detachably connected to the upper end surface of each deformable adjustment base (1). Semi-circular plates (3) with different heights are fixedly connected to the upper end surfaces of the corresponding semi-circular plate bottom plates (2) on different deformable adjustment bases (1). The semi-circular plates (3) are perpendicularly connected to the corresponding semi-circular plate bottom plates (2), and the arc ends of the semi-circular plates (3) face upwards.

2. The anti-deformation adjustment device for a steel box girder plate unit according to claim 1, wherein, A number of first threaded holes (100) are formed on the upper end surface of each deformable adjustment base (1). Second threaded holes (200) corresponding to the first threaded holes (100) are formed on each semi-circular plate bottom plate (2). The detachable connection between the deformable adjustment base (1) and the corresponding semi-circular plate bottom plate (2) is achieved by inserting a connecting bolt (4) into the second threaded hole (200) and its corresponding first threaded hole (100).

3. A reverse deformation adjustment device for a steel box girder plate unit according to claim 1, characterized in that, A number of stiffening plates (5) are arranged between the two side surfaces of the semi-circular plate (3) and the corresponding semi-circular plate bottom plate (2).

4. A reverse deformation adjustment device for a steel box girder plate unit according to claim 3, characterized in that The stiffening plates (5) are fixedly connected to the side surface of the semi-circular plate (3) and the upper end surface of the semi-circular plate bottom plate (2) by welding.

5. The anti-deformation adjustment device for steel box girder plate units according to claim 1, characterized in that, A hoisting hole (300) is formed through the side wall of each semi-circular plate (3).

6. The anti-deformation adjustment device for steel box girder plate units according to claim 5, characterized in that, The hoisting holes (300) are symmetrically arranged with respect to the central position of the semi-circular plate (3).

7. A reverse deformation adjustment device for a steel box girder plate unit according to claim 1, characterized in that, Each semi-circular plate bottom plate (2) matches the upper end surface of the corresponding deformable adjustment base (1), and each semi-circular plate (3) is located at the central axis position of the corresponding semi-circular plate bottom plate (2).

8. A device for adjusting the reverse deformation of a steel box girder plate unit according to claim 1, characterized in that, The semi-circular plate (3) and the corresponding semi-circular plate bottom plate (2) are fixedly connected by welding.

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