A support device for steel box girder falling beam

Abstract

This invention provides a support device for lowering steel box girders, comprising a first pad, a second pad, and a third pad. The first, second, and third pads are stacked vertically from top to bottom to form support for the steel box girder. This invention uses three pads of different heights to meet the varying lowering heights of steel box girders, especially in high-position lowering applications. By segmenting the support device, the first, second, and third pads are stacked vertically from top to bottom on temporary support columns, allowing for easy adjustment of their positions based on actual conditions and easy dismantling. The segmented arrangement of the three pads with different heights results in a simple structure and convenient operation. The different heights of the first, second, and third pads can be interchanged to match the lowering height requirements of the construction site, achieving precise lowering and making construction safer and more reliable.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and more specifically, to a support device for lowering a steel box girder. Background Technology

[0002] Steel box girders are a commonly used structural form for large cross-border bridges and are widely used in the construction of bridges crossing existing railways and viaducts. For large-span, large-specification steel box girders, the hoisting risk is high. They are usually installed by jacking and lowering. That is, a longitudinal lowering device is installed on the support column. After the steel box girder is jacked from one side to the support column, it is gradually lowered using the lowering device and jacks. After lowering, the steel box girder is installed on the permanent support column.

[0003] In existing bridge construction technology, the patent authorization announcement number CN219671103U, entitled "A Steel Box Girder High-Level Beam Drop Pier Structure," describes a steel box girder high-level beam drop pier structure, belonging to the field of high-level beam drop pier technology. It includes a support base, support columns, and a top support assembly. The top support assembly is installed on the support base via the support columns. The top support assembly includes jacks, fixing components, a top component, and a top plate. The jacks are installed on the top of the support columns via the fixing components, and the top plate is installed on the output shaft of the jacks via the top component. The top plate is used to support the high-level beam drop. The support base, support columns, and top support assembly are all detachable. The jacks are used for temporary height precision adjustment. The fixing components are used to fix the position and spacing of the jacks, giving the entire device high stability and safety.

[0004] However, the technical solutions of the above patents have the following drawbacks:

[0005] 1. Due to the limitation of the adjustable height of the jacks in the top support components, the beam lowering height is restricted;

[0006] 2. The support base is a fixed structure made of concrete. It needs to be poured in advance and cannot be moved after pouring. Moreover, its dismantling is complicated and requires protection during the dismantling process.

[0007] 3. The top support component has four jacks, which is a large number and may cause synchronization errors. Summary of the Invention

[0008] This utility model provides a support device for lowering steel box girders, which solves the technical problems of limited height adjustment and difficulty in dismantling existing support devices for lowering steel box girders.

[0009] This utility model provides a support device for lowering a steel box girder, comprising at least one first pad, at least one second pad, and at least one third pad. Multiple pads of the same type are stacked adjacent to each other vertically. The first, second, and third pads are stacked vertically from top to bottom, with the top surface of the uppermost first pad contacting the bottom of the steel box girder, and the bottom surface of the lowermost third pad connected to a temporary support column. The vertical stacking of the first, second, and third pads forms support for the steel box girder. All three pads are detachable to adjust the lowering height of the steel box girder. The height ratio of the third pad to the second pad is 2–10; the height ratio of the second pad to the first pad is 1–100.

[0010] Furthermore, the first pad is made of sheet steel.

[0011] Furthermore, the second pad is composed of a top plate A, an elevated portion A, and a bottom plate A, with the elevated portion A located between the top plate A and the bottom plate A.

[0012] Furthermore, the third pad is composed of a top plate (B), an elevated portion (B), and a bottom plate (B), with the elevated portion (B) located between the top plate (B) and the bottom plate (B).

[0013] Furthermore, the top plate A and the bottom plate A extend outward in the horizontal direction relative to the raised portion A to form an extension portion A, and the extension portion A is provided with a lifting hole A.

[0014] Furthermore, the top plate B and the bottom plate B extend outward in the horizontal direction relative to the raised portion B to form a protruding portion B, and the protruding portion B is provided with a lifting hole B.

[0015] Furthermore, the lifting holes A and B are positioned opposite each other, and when the second pad and the third pad are stacked, the lifting holes A and B, which are in opposite positions, are coaxial.

[0016] Furthermore, the A-level raised section is made of four square steel tubes of the same height.

[0017] Furthermore, the B-shaped raised portion is made of a round steel pipe, and the round steel pipe is provided with stiffening ribs.

[0018] Furthermore, the height ratio of the third pad to the second pad is 4 to 6; the height ratio of the second pad to the first pad is 10 to 20.

[0019] The beneficial effects of this utility model are:

[0020] This utility model discloses a support device for lowering steel box girders. It employs three types of pads—a first pad, a second pad, and a third pad—each with a different applicable height. These three pads are combined to meet varying lowering heights of the steel box girders, particularly in high-position lowering applications. By segmenting the support device, the first, second, and third pads are stacked vertically from top to bottom on temporary support columns. Their positions can be adjusted as needed and are easily dismantled. This utility model's support device for lowering steel box girders, with its segmented arrangement of three different height pads, features a simple structure and convenient operation. The different heights of the first, second, and third pads allow for replacement to match the lowering height requirements of the construction site, achieving precise lowering and making construction safer and more reliable.

[0021] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0023] Figure 1 This is a schematic diagram of the transverse cross-section of the steel box girder during the lowering of the beam according to an embodiment of this utility model;

[0024] Figure 2 This is an exploded schematic diagram of the support device according to an embodiment of the present invention;

[0025] Figure 3 This is an exploded perspective view of the support device according to an embodiment of the present invention;

[0026] Figure 4 This is a front view of the second pad block according to this utility model;

[0027] Figure 5 This is a top view of the second pad block according to this utility model;

[0028] Figure 6 This is a front view of the third pad block according to this utility model;

[0029] Figure 7 This is a top view of the third pad block according to this utility model;

[0030] Figure 8 This is a schematic diagram of the support device stacking according to an embodiment of the present utility model;

[0031] Figure 9 This is the longitudinal section state of the support device for lowering the steel box girder according to an embodiment of the present invention during girder lowering. Figure 1 ;

[0032] Figure 10 This is the longitudinal section state of the support device for lowering the steel box girder according to an embodiment of the present invention during girder lowering. Figure 2 ;

[0033] Figure 11 This is a diagram showing the longitudinal section of the steel box girder after its installation, according to an embodiment of the present invention.

[0034] Figure label:

[0035] First pad, 10; Second pad, 20; Third pad, 30; Steel box girder, 40; Jack, 50; Temporary support column, 60; Permanent support column, 70; Bolt, 80;

[0036] A. Top plate, 21; A. Elevated section, 22; A. Bottom plate, 23; A. Extension, 24; A. Lifting hole, 25; B. Top plate, 31; B. Elevated section, 32; B. Bottom plate, 33; B. Extension, 34; B. Lifting hole, 35; Stiffening rib, 36; Longitudinal distribution beam of temporary support column, 61; Transverse distribution beam of temporary support column, 62. Detailed Implementation

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0040] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0042] In the specification and claims of this utility model, the terms "first" and "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The following describes in detail, with reference to the accompanying drawings, a support device for lowering a steel box girder according to an embodiment of the present invention.

[0046] A support device for lowering a steel box girder according to an embodiment of the present invention includes at least one first pad 10, at least one second pad 20, and at least one third pad 30. Multiple pads of the same type are stacked vertically adjacent to each other. The first pad 10, second pad 20, and third pad 30 are stacked vertically from top to bottom. The top surface of the uppermost first pad 10 contacts the bottom of the steel box girder 40, and the bottom surface of the lowermost third pad 30 is connected to a temporary support column 60. The vertical stacking of the first pad 10, second pad 20, and third pad 30 forms support for the steel box girder 40. All three pads are detachable to adjust the lowering height of the steel box girder 40. The height ratio of the third pad 30 to the second pad 20 is 2 to 10; the height ratio of the second pad 20 to the first pad 10 is 1 to 100.

[0047] In other words, in a steel box girder lowering support device according to an embodiment of this utility model, the number of the first pad 10, the second pad 20, and the third pad 30 is at least one, and their heights increase progressively. That is, the height of the first pad 10 does not exceed that of the second pad 20, and the height ratio of the second pad 20 to the first pad 10 is 1 to 100. The height of the second pad 20 is less than that of the third pad 30, and the height ratio of the third pad 30 to the second pad 20 is 2 to 10. Of course, the heights and height ratios of the three pads can be designed and evaluated according to the actual lowering height, such as the height ratio of the third pad 30 to the second pad 20 being 4 to 6; and the height ratio of the second pad 20 to the first pad 10 being 10 to 20. Preferably, in this embodiment, the first pad 10 can be made of sheet steel plate, and its thickness can be adopted according to the actual situation, usually 1 to 100 mm. The height of the second pad 20 is 100 mm, and the height of the third pad 30 is 500 mm. In use, multiple identical pads are stacked vertically adjacent to each other; that is, multiple first pads 10 are stacked adjacent to each other; multiple second pads 20 are stacked adjacent to each other; and multiple third pads 30 are stacked adjacent to each other. The first pads 10, second pads 20, and third pads 30 are stacked vertically from top to bottom, with the top surface of the uppermost first pad 10 contacting the bottom of the steel box girder 40, and the bottom surface of the lowermost third pad 30 connecting to the temporary support column 60. The temporary support column 60 is temporarily erected according to on-site construction needs and includes a longitudinal distribution beam 61 and a transverse distribution beam 62. The lowermost third pad 30 can be placed on either the longitudinal distribution beam 61 or the transverse distribution beam 62, depending on the location of the construction point. The temporary support column 60 is removed after the beam lowering is completed. The first pad 10, the second pad 20, and the third pad 30 are stacked vertically to support the steel box girder 40. All three pads are removable to adjust the lowering of the steel box girder 40. During lowering, the number of the three types of pads can be adjusted according to the required lowering height, and the types of pads can also be replaced to match different size requirements. Because the three types of pads are designed with different heights, the lowering height can be more precisely controlled.

[0048] This utility model discloses a support device for lowering steel box girders. It employs three types of blocks of different heights: a first block 10, a second block 20, and a third block 30. Each block is suitable for a different height, and the blocks can be combined to meet the lowering height requirements of steel box girders at various heights, especially in high-position lowering applications. By segmenting the support device, the first block 10, second block 20, and third block 30 are stacked vertically from top to bottom on a temporary support column 60. Their positions can be adjusted as needed and are easily dismantled. This utility model's support device for lowering steel box girders, with its segmented arrangement of blocks of three different heights, features a simple structure and convenient operation. The different heights of the first block 10, second block 20, and third block 30 allow for interchangeability to match the lowering height requirements of the construction site, achieving precise lowering and making construction safer and more reliable.

[0049] According to one embodiment of the present invention, such as Figure 4 , Figure 5 As shown, the second pad 20 consists of a top plate A 21, an elevated portion A 22, and a bottom plate A 23. Both the top plate A 21 and the bottom plate A 23 are made of steel plates, preferably 10 mm thick. The elevated portion A 22 is located between the top plate A 21 and the bottom plate A 23. The height of the elevated portion A is preferably 80 mm, and it is preferably made of four square steel tubes of the same height. The top plate A 21, the elevated portion A 22, and the bottom plate A 23 are welded together.

[0050] In another embodiment, such as Figure 6 , Figure 7 As shown, the third pad 30 consists of a top plate 31 (B), a raised portion 32 (B), and a bottom plate 33 (B). Both the top plate 31 and the bottom plate 33 are made of steel plates, preferably with a thickness of 10 mm. The raised portion 32 is located between the top plate 31 and the bottom plate 33. The raised portion is preferably 480 mm high and is preferably made of a round steel pipe. The top plate 31, the raised portion 32, and the bottom plate 33 are welded together.

[0051] Therefore, according to this utility model, a support device for lowering a steel box girder includes a first pad 10, a second pad 20, and a third pad 30, all made of steel. The first pad 10 is made of a steel plate with a height of 1-100mm, allowing for a reduction in the number of pads and meeting the clearance requirements between the bottom of the steel box girder and the pads. The second pad 20 and the third pad 30 have heights of 100mm and 500mm, respectively. The three different heights of the pads allow for adjustments to the number of pads on-site to regulate the lowering height at different positions. Especially for example... Figure 1 As shown, Figure 1This is a schematic diagram of the transverse section of the steel box girder during the lowering of the girder according to an embodiment of this utility model. When the steel box girder is designed with a slope, the height requirement of the support device for lowering the steel box girder is different at different positions, such as... Figure 1 As shown, the height decreases from right to left. Due to the differentiated height design of the three types of pads in this invention, in this case, different heights on the left and right sides can be supported by matching different numbers of the three types of pads. The number of second pads 20 in the support device for lowering the steel box girder in the rightmost column is significantly greater than the number of second pads 20 in the support device for lowering the steel box girder in the leftmost column. The first pad 10, being the smallest of the three types of pads, has a steel plate thickness that can be designed according to the construction conditions, with a minimum thickness of 1mm. This allows for precise adjustment of the beam lowering support, reducing the number of pads and meeting the gap requirements between the bottom of the steel box girder and the pads. The weight design of the three types of pads allows for manual operation, and the beam lowering process can be completed manually. The operation is simple, and all three types of pads are made of steel structure, making them recyclable or reusable.

[0052] According to one embodiment of the present invention, such as Figure 4 As shown, the top plate 21 and the bottom plate 23 extend outward in the horizontal direction relative to the raised part 22 to form the extension part 24, and the extension part 24 is provided with the lifting hole 25.

[0053] In another embodiment, such as Figure 6 , Figure 7 As shown, the top plate 31 and bottom plate 33 of B extend outward in the horizontal direction relative to the raised part 32 of B to form a protruding part 34 of B, and the protruding part 34 of B is provided with a lifting hole 35 of B.

[0054] Among them, the lifting hole A 25 and the lifting hole B 35 are positioned opposite each other. When the second pad 20 and the third pad 30 are stacked, the lifting hole A 25 and the lifting hole B 35 are coaxial.

[0055] In other words, when multiple second pads 20 are stacked adjacent to each other, two adjacent second pads 20 can be fixed by lifting holes A at relative positions, preferably by bolts 80.

[0056] When the second pad 20 and the third pad 30 are stacked, the A lifting hole 25 and the B lifting hole 35, which are in opposite positions, are coaxial and are fixed together by bolts 80.

[0057] Therefore, according to the present invention, a support device for lowering a steel box girder is used to increase the overall strength of the support device by fixing it with bolts 80. At the same time, after the first pad 10, the second pad 20 and the third pad 30 are stacked, the center of force is in the same vertical direction, which can better transmit the force.

[0058] According to one embodiment of the present invention, such as Figure 6 , Figure 7 As shown, the B-shaped raised part 32 is made of a round steel tube, and stiffening ribs 36 are provided inside the round steel tube. The stiffening ribs 36 are used to increase the structural strength and rigidity of the third pad 30. By reasonably distributing the stiffening ribs 36, the concentrated stress can be dispersed to the overall structure of the third pad 30, avoiding excessive local stress that could lead to the breakage or fatigue failure of the third pad 30.

[0059] The detailed working process of this utility model is as follows:

[0060] Multiple sets of steel box girder lowering support devices are placed at the top of the temporary support column 60 according to the design requirements and in reasonable positions, such as... Figure 1 As shown, the temporary support column top distribution beam 61 at the top of the support column 60 can be used to set up a partial steel box girder support device on the temporary support column distribution beam 61. For example... Figure 9 As shown, on the longitudinal section of the steel box girder 40, the bottom of a portion of the steel box girder lowering support device is connected to the top of the support column 60 / the distribution beam 61 on the temporary support column. For ease of distinction, this is referred to as group A support device. The bottom of another portion of the steel box girder lowering support device is connected to the jack 50, and this is referred to as group B support device. That is to say, group A support device does not include jack 50, while group B support device does include jack 50.

[0061] Next reference Figures 9 to 11 As shown:

[0062] First, lift jack 50. At this time, the B group support device lifts the steel box girder 40, causing the A group support device to detach from the steel box girder 40. Then, remove part of the first pad 10 of the A group support device.

[0063] Next, lower jack 50 to lower the steel box girder 40. During the descent of jack 50, the steel box girder 40 comes into contact with the A-group support device. Continue to lower jack 50 to detach the B-group support device from the steel box girder 40 and remove part of the first pad 10 of the B-group support device.

[0064] Repeat the above steps, sequentially removing the first pads 10 on the A and B support devices. During this process, the steel box girder 40 gradually lowers as the number of first pads 10 decreases. Once all first pads 10 are removed, replace the second pads 20 on the A and B support devices with the first pads 10. Continue repeating the above steps until all second pads 20 are removed.

[0065] Then, replace the third pad 30 on both the A-group and B-group support devices with the second pad 20, and cyclically replace the second pad 20 with the first pad 10, gradually lowering the steel box girder 40 onto the permanent support column 70. Figure 10 As shown.

[0066] After the construction of the steel box girder 40 and permanent support column 70 is completed, the supporting devices for lowering the steel box girder, jacks 50, and temporary support columns 60 will be gradually dismantled, as follows: Figure 11 As shown.

[0067] Of course, jacks 50 can also be installed on both sets of support devices. Those skilled in the art can make reasonable selections based on the on-site construction conditions during operation, which will not be elaborated here.

[0068] Since all three types of pads used in the support device for lowering the steel box girder are made of steel, they can be reused or recycled after removal. Furthermore, the weight design of the three types of pads allows for manual operation; removal can be carried out using either hoisting equipment or manually, making it simple and safe.

[0069] The beneficial effects of this utility model are:

[0070] 1. Three types of pads are set according to the actual site conditions, and the height and quantity can be adjusted to adjust the beam drop height at different positions, especially to meet the needs of high beam drop.

[0071] 2. The thickness of the first pad 10 can be controlled between 1mm and 100mm according to the actual situation, so as to minimize the number of the first pads 10, while meeting the gap requirements between the bottom of the steel box girder 40 and the pads.

[0072] 3. After the first pad 10, the second pad 20 and the third pad 30 are stacked, the center of force is in the same vertical direction, which can better transmit the force;

[0073] 4. The weight of the first pad 10, the second pad 20 and the third pad 30 can be controlled within the limits of manual operation, so that the beam lowering process and dismantling can be completed manually.

[0074] 5. The first pad 10, the second pad 20 and the third pad 30 are made of detachable steel material, are segmented, and can be reused or recycled.

[0075] 6. The first pad block 10 adopts a thin plate structure to overcome the problem of synchronization error when the beam is lowered.

[0076] Of course, for those skilled in the art, the other structures and working principles of the support device for lowering steel box girders are understandable and achievable, and will not be described in detail in this utility model.

[0077] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A support device for lowering a steel box girder, characterized in that, It includes at least one first pad (10), at least one second pad (20), and at least one third pad (30). Multiple pads of the same type are stacked vertically adjacent to each other. The first pad (10), second pad (20), and third pad (30) are stacked vertically from top to bottom. The top surface of the uppermost first pad (10) contacts the bottom of the steel box girder (40), and the bottom surface of the lowermost third pad (30) is connected to the temporary support column (60). The first pad (10), the second pad (20), and the third pad (30) are stacked vertically to form a support for the steel box girder (40). The first pad (10), the second pad (20), and the third pad (30) are all detachable to adjust the drop height of the steel box girder (40). The height ratio of the third pad (30) to the second pad (20) is 2 to 10, and the height ratio of the second pad (20) to the first pad (10) is 1 to 100.

2. The support device for lowering a steel box girder according to claim 1, characterized in that, The first pad (10) is made of sheet steel.

3. The support device for lowering a steel box girder according to claim 2, characterized in that, The second pad (20) is composed of a top plate (21), an elevated part (22), and a bottom plate (23), wherein the elevated part (22) is located between the top plate (21) and the bottom plate (23).

4. The support device for lowering a steel box girder according to claim 3, characterized in that, The third pad (30) is composed of a top plate (31), a raised part (32), and a bottom plate (33), with the raised part (32) located between the top plate (31) and the bottom plate (33).

5. A support device for lowering a steel box girder according to claim 4, characterized in that, The top plate (21) and the bottom plate (23) of A extend outward in the horizontal direction relative to the raised part (22) of A to form an extension part (24), and the extension part (24) of A is provided with a lifting hole (25).

6. A support device for lowering a steel box girder according to claim 5, characterized in that, The top plate (31) and the bottom plate (33) of B extend outward in the horizontal direction relative to the raised part (32) of B to form a protruding part (34), and the protruding part (34) of B is provided with a lifting hole (35).

7. A support device for lowering a steel box girder according to claim 6, characterized in that, The A lifting hole (25) and the B lifting hole (35) are positioned opposite each other. When the second pad (20) and the third pad (30) are stacked, the A lifting hole (25) and the B lifting hole (35) are coaxial.

8. A support device for lowering a steel box girder according to claim 5, characterized in that, The A-level raised section (22) is made of four square steel pipes of the same height.

9. A support device for lowering a steel box girder according to claim 6, characterized in that, The B-shaped raised part (32) is made of a round steel pipe, and the round steel pipe is provided with stiffening ribs (36).

10. A support device for lowering a steel box girder according to claim 1, characterized in that, The height ratio of the third pad (30) to the second pad (20) is 4 to 6; the height ratio of the second pad (20) to the first pad (10) is 10 to 20.

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