Adjustable vertical rod structure for bailey beam and construction method of adjustable vertical rod structure

Abstract

An adjustable vertical rod structure for a bailey beam comprises supporting profile steel and an adjusting assembly connected to the end of the supporting profile steel and used for adjusting the axial position of the other end of the supporting profile steel. The adjusting assembly is composed of a bottom wedge-shaped block and an adjusting wedge-shaped block arranged on the bottom wedge-shaped block in a lifting mode, the end of the supporting profile steel is connected to the adjusting wedge-shaped block, and the adjusting wedge-shaped block and the supporting profile steel ascend and descend synchronously. The adjusting assembly further comprises a penetrating screw connected with the bottom wedge-shaped block and the adjusting wedge-shaped block in a penetrating mode at the same time, and the penetrating screw is provided with a first fastening nut abutting against the bottom wedge-shaped block and a second fastening nut abutting against the adjusting wedge-shaped block. Compared with the prior art, by arranging the bottom wedge-shaped block and the adjusting wedge-shaped block capable of ascending and descending on the bottom wedge-shaped block, the supporting profile steel is synchronously driven to ascend and descend in the ascending and descending process of the adjusting wedge-shaped block, and therefore the distance between the top end of the supporting profile steel and the bailey beam web member is controlled.

Description

Technical Field

[0001] This invention relates to the field of Bailey beam construction technology, specifically to an adjustable vertical rod structure for Bailey beams and its construction method. Background Technology

[0002] Bailey bridges, also known as Bailey trusses or Bailey beams, are prefabricated truss structures composed of standardized steel components. They are widely used in highway, railway, municipal, building, and water conservancy construction projects, such as lifting and moving prefabricated components in bridge construction prefabrication yards, transporting large beams beside bridge piers, supporting cast-in-place box girders, construction platforms, and temporary construction bridges.

[0003] During the construction of Bailey bridges, reinforcing vertical bars welded to the Bailey bridges are usually installed at different locations to optimize the local stress distribution and improve the load-bearing capacity of the Bailey bridges. However, due to deviations in the actual use of the reinforcing vertical bars and inadequate welding processes, gaps exist during the actual installation process, and the reinforcing vertical bars fail to fully exert their role in strengthening the local load-bearing capacity, resulting in low construction efficiency.

[0004] In general, the common method is to weld steel plates to the ends of the reinforcing vertical members or to weld the gaps together. This method has low construction efficiency, requires a certain level of precision in material cutting, and welding may weaken the load-bearing capacity of the chord members, which is detrimental to the overall structural performance.

[0005] Chinese patent CN219824931U discloses an adjustable-length Bailey beam non-destructive reinforcement vertical bar, including a lower I-beam. Fixed bases are installed at both the front and rear ends of the top of the lower I-beam. The fixed bases are located on the front and rear sides of the web members of the Bailey beam. A vertical steel pipe is welded to the top of the fixed base. An adjustable top support is installed on the top of the vertical steel pipe. A swivel is fitted on the outside of the adjustable top support. An upper I-beam is installed on the top of the adjustable top support.

[0006] The aforementioned reinforced vertical bar supports the Bailey beam through I-beams located at both ends of the vertical bar. However, this support method, which relies solely on contact, is insufficient to ensure effective support for the Bailey beam. Furthermore, when adjusting the contact position, the aforementioned reinforced vertical bar only achieves support through the self-locking between the threads, resulting in limited support. Under the high pressure of the Bailey beam, the threads are prone to loosening, affecting the support effect. Summary of the Invention

[0007] The present invention aims to overcome the defects in the prior art and provide an adjustable vertical rod structure for Bailey beams with good self-locking performance, high support structure strength, and reusable parts of the structure, as well as its construction method.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an adjustable vertical rod structure for Bailey beams, comprising a supporting steel section and an adjusting assembly connected to one end of the supporting steel section and adjusting the axial position of the other end of the supporting steel section; the adjusting assembly consists of a bottom wedge block and an adjusting wedge block that is lifted and lowered on the bottom wedge block, the end of the supporting steel section is connected to the adjusting wedge block, and the adjusting wedge block and the supporting steel section are raised and lowered synchronously; the adjusting assembly further includes a through screw that simultaneously engages with the bottom wedge block and the adjusting wedge block, the through screw being provided with a first fastening nut that abuts against the bottom wedge block and a second fastening nut that abuts against the adjusting wedge block, the first fastening nut and the second fastening nut locking the relative position between the bottom wedge block and the adjusting wedge block.

[0009] As a preferred embodiment of the present invention, both the bottom wedge block and the adjusting wedge block are right-angled triangular structures with one side inclined and the two sides perpendicular, and the bottom wedge block and the adjusting wedge block are stacked in opposite directions with their inclined surfaces touching.

[0010] In a preferred embodiment of the present invention, the inclined surface of the bottom wedge block is inclined downward toward the direction of the adjusting wedge block, and the inclined surface of the adjusting wedge block is inclined upward toward the direction of the bottom wedge block.

[0011] As a preferred embodiment of the present invention, a first through hole for loading the through screw is formed in the bottom wedge block, and a second through hole for loading the through screw is formed in the adjusting wedge block, and the first through hole and the second through hole are always in a connected state.

[0012] In a preferred embodiment of the present invention, the diameters of the first through hole and the second through hole are both larger than the diameter of the threaded screw, and the threaded screw passes through both the first through hole and the second through hole.

[0013] In a preferred embodiment of the present invention, the diameter of the first through hole is matched with the diameter of the through screw, the diameter of the second through hole is larger than the diameter of the through screw, and the through screw passes through both the first through hole and the second through hole.

[0014] In a preferred embodiment of the present invention, both the first fastening nut and the second fastening nut are threadedly connected to the screw, and the first fastening nut and the second fastening nut are located on opposite sides of the adjusting assembly.

[0015] In a preferred embodiment of the present invention, the supporting steel is vertically arranged on the adjusting wedge block, and the supporting steel is perpendicular to the threaded screw.

[0016] A construction method for an adjustable vertical member structure for Bailey bridges, based on the adjustable vertical member structure for Bailey bridges, includes the following steps: Step A: Determine the installation position and design length of the vertical members based on the Bailey beam design drawings; Step B: The support steel and adjustment components are prepared in the factory to ensure that the adjustment range of the adjustment components meets the adjustment requirements of the support steel. Step C: Install the adjustment assembly at the required installation position on the Bailey beam, adjust the adjustment assembly to the loose state, and tighten the second fastening nut according to the required height of the supporting steel to adjust the position of the adjustment wedge block; Step D: After the supporting steel is positioned, the supporting steel supports the Bailey beam through welding; Step E: After the overall Bailey beam structure is formed, the adjustable vertical rod structure is dismantled. After cutting the weld between the supporting steel and the Bailey beam, the adjustable vertical rod structure can be dismantled inside the Bailey beam by loosening the second fastening nut. At the same time, the dismantled adjustable vertical rod structure can be used on the next working surface of the Bailey beam.

[0017] In a preferred embodiment of the present invention, the adjustment component in step C consists of a bottom wedge block and an adjustment wedge block stacked in opposite directions, and both the bottom wedge block and the adjustment wedge block abut against the Bailey beam in the released state.

[0018] Compared with the existing technology, by setting a bottom wedge block and an adjustable wedge block that can be raised and lowered, the supporting steel is raised and lowered simultaneously during the raising and lowering of the adjustable wedge block, thereby controlling the distance between the top of the supporting steel and the web member of the Bailey beam, and satisfying the effective welding operation between the top of the supporting steel and the web member of the Bailey beam. By forming a symmetrical tangential complementary structure with a bottom wedge block and an adjusting wedge block, the adjusting wedge block can be raised and lowered by sliding along the inclined surface at the bottom of the bottom wedge block. During the raising and lowering process, the top surface of the adjusting wedge block connected to the supporting steel is always in a horizontal state, ensuring that the supporting steel is always in a vertical state. The design of the bottom wedge and the adjusting wedge optimizes the force transmission path and avoids local stress concentration. When the adjusting wedge bears the vertical load from the supporting steel, the vertical load will be dispersed along the inclined plane formed by the contact surface of the bottom wedge and the adjusting wedge, thereby transferring the vertical load to a larger contact area. Under the action of the bottom wedge and the adjusting wedge, the pressure transmitted from the bottom wedge to the web members of the Bailey beam can be reduced by 30%-50%, thereby improving the overall structural strength of the Bailey beam. After the adjustable vertical rod structure is used, it can be reused by cutting the connection between the top of the supporting steel and the web member of the Bailey beam and loosening the second fastening nut. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the adjustment component structure in Embodiment 1; Figure 3 This is a schematic diagram of the adjustment component structure in Embodiment 2; Figure 4 This is a schematic diagram of the bottom wedge block in Embodiment 1; Figure 5 This is a schematic diagram of the bottom wedge block in Embodiment 2; Figure 6 This is a schematic diagram of the adjusting wedge block structure; Reference numerals: 1. Supporting steel; 2. Adjusting component; 3. Bottom wedge block; 31. First through hole; 32. First fastening nut; 4. Adjusting wedge block; 41. Second through hole; 42. Second fastening nut; 5. Through bolt. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-6 As shown, an adjustable vertical rod structure for Bailey beams includes a support steel section 1 and an adjusting assembly 2 connected to one end of the support steel section 1 and adjusting the axial position of the other end of the support steel section 1. The adjusting assembly 2 consists of a bottom wedge block 3 and an adjusting wedge block 4 that is lifted and lowered on the bottom wedge block 3. The end of the support steel section 1 is connected to the adjusting wedge block 4, and the adjusting wedge block 4 rises and falls synchronously with the support steel section 1. The adjusting assembly 2 also includes a through screw 5 that simultaneously engages with the bottom wedge block 3 and the adjusting wedge block 4. The through screw 5 is provided with a first fastening nut 32 that abuts against the bottom wedge block 3 and a second fastening nut 42 that abuts against the adjusting wedge block 4, respectively. The first fastening nut 32 and the second fastening nut 42 lock the relative position between the bottom wedge block 3 and the adjusting wedge block 4.

[0022] Support steel 1 is used to support the web members on both sides of the Bailey beam. Under the action of support steel 1, the spacing between the web members on both sides of the Bailey beam is ensured, thereby strengthening the overall structural strength of the Bailey beam. Adjustment component 2 is used to adjust the total length of the adjustable vertical structure. It ensures that while adjustment component 2 abuts against one side of the Bailey beam, the spacing between the end of support steel 1 and the other side of the Bailey beam is controllable. This satisfies the requirement to achieve fixed welding between the end of support steel 1 and the other side of the Bailey beam through welding, thereby improving the overall support strength of the adjustable vertical structure for the Bailey beam.

[0023] During the adjustment process, the bottom wedge block 3 of the adjustment component 2 remains relatively stationary. By controlling the height of the adjustment wedge block 4, the end height of the support steel 1 is adjusted synchronously, thereby satisfying the control of the distance between the support steel 1 and the web member of the Bailey beam.

[0024] The through-bolt 5, the first fastening nut 32, and the second fastening nut 42 are used to self-lock the adjusting component 2, thereby locking the relative position between the bottom wedge block 3 and the adjusting wedge block 4, and positioning and locking the position of the adjusting wedge block 4 and the supporting steel 1.

[0025] Both the bottom wedge block 3 and the adjusting wedge block 4 are right-angled triangular structures with one side inclined and the two sides perpendicular, and the bottom wedge block 3 and the adjusting wedge block 4 are stacked in opposite directions with their inclined surfaces touching.

[0026] The inclined surface of the bottom wedge block 3 is inclined downward toward the direction of the adjusting wedge block 4, and the inclined surface of the adjusting wedge block 4 is inclined upward toward the direction of the bottom wedge block 3.

[0027] The bottom wedge block 3 and the adjusting wedge block 4 form a base for adjusting and supporting the supporting steel 1. The bottom wedge block 3 and the adjusting wedge block 4 are combined to form a symmetrical and complementary structure. The adjusting wedge block 4 can be raised and lowered by sliding along the inclined surface at the bottom of the bottom wedge block 3. During the raising and lowering process, the top surface of the adjusting wedge block 4 connected to the supporting steel 1 is always in a horizontal state, ensuring that the supporting steel 1 is always in a vertical state.

[0028] Meanwhile, under the action of the bottom wedge block 3 and the adjusting wedge block 4 of the two right-angled triangular structures, the adjusting wedge block 4 can achieve high-precision height adjustment during the movement process, and meet the precise adjustment of the gap between the supporting steel 1 and the web member of the Bailey beam.

[0029] The placement of the bottom wedge block 3 and the adjusting wedge block 4 optimizes the force transmission path and avoids local stress concentration. When the adjusting wedge block bears the vertical load from the supporting steel 1, the vertical load will be dispersed along the inclined plane formed by the contact surfaces of the bottom wedge block 3 and the adjusting wedge block 4, thereby transferring the vertical load to a larger contact area. Under the action of the bottom wedge block 3 and the adjusting wedge block 4, the pressure transmitted from the bottom wedge block 3 to the web members of the Bailey beam can be reduced by 30%-50%, thereby improving the overall structural strength of the Bailey beam.

[0030] The vertical load of the supporting steel 1 consists of the weight of the supporting steel 1 itself and the pressure of the Bailey beam after the self-locking adjustment component 2.

[0031] Meanwhile, the vertical sides of the bottom wedge block 3 and the adjusting wedge block 4 can serve as shear-resistant surfaces. Under the action of their own triangular structures, the bottom wedge block 3 and the adjusting wedge block 4 can resist shear deformation.

[0032] The bottom wedge block 3 has a first through hole 31 for loading the through screw 5, and the adjusting wedge block 4 has a second through hole 41 for loading the through screw 5. The first through hole 31 and the second through hole 41 are always in a connected state.

[0033] Under the action of the connected first through hole 31 and second through hole 41, the through screw 5 is set to pass through the first through hole 31 and the second through hole 41 at the same time, thereby satisfying the requirement that the through screw 5 simultaneously connects the bottom wedge block 3 and the adjusting wedge block 4. Under the action of the same through screw 5, the overall width of the bottom wedge block 3 and the adjusting wedge block 4 is limited by the action of the first fastening nut 32 and the second fastening nut 42, thereby achieving the positioning and locking between the bottom wedge block 3 and the adjusting wedge block 4.

[0034] Example 1: The diameters of the first through hole 31 and the second through hole 41 are both larger than the diameter of the through screw 5, and the through screw 5 is set to pass through both the first through hole 31 and the second through hole 41.

[0035] At this time, the height of the through screw 5 will change with the movement of the adjusting wedge block 4. In the initial state, the through screw 5 abuts against the lowest point of the first through hole 31. As the adjusting wedge block 4 moves upward along the inclined plane, the second through hole 41 moves synchronously with the movement of the adjusting wedge block 4. At this time, the position of the through screw 5 in the second through hole 41 changes until the lowest point of the second through hole 41 abuts against the through screw 5. The second through hole 41 rises further, supporting the through screw 5 at the bottom of the second through hole 41. As the adjusting wedge block 4 moves upward along the inclined plane, it synchronously drives the through screw 5 to move upward until the through screw 5 abuts against the top of the first through hole 31. This is the highest position that the adjusting wedge block 4 can move.

[0036] At this point, the maximum range that the overall adjustment component 2 can move is the sum of the diameter of the first through hole 31 and the diameter of the second through hole 41 minus twice the diameter of the connecting screw 5.

[0037] Example 2: The diameter of the first through hole 31 is matched with the diameter of the through screw 5, and the diameter of the second through hole 41 is larger than the diameter of the through screw 5. The through screw 5 passes through both the first through hole 31 and the second through hole 41.

[0038] At this time, the height of the through screw 5 remains relatively stationary as the adjusting wedge block 4 moves. The through screw 5 is always in contact with the first through hole 31. As the adjusting wedge block 4 moves upward along the inclined plane, the second through hole 41 moves synchronously with the adjusting wedge block 4. At this time, the position of the through screw 5 in the second through hole 41 changes until the lowest point of the second through hole 41 is in contact with the through screw 5. This is the highest position that the adjusting wedge block 4 can move.

[0039] At this point, the maximum range that the overall adjustment component 2 can move is the diameter of the second through hole 41 minus the diameter of the threaded screw 5.

[0040] Compared to Embodiment 1, the threaded screw 5 in Embodiment 2 has better stability during use, ensuring that the threaded screw 5 is always in a horizontal state, and ensuring that the adjusting component 2 is locked under the tightening action of the first fastening nut 32 and the second fastening nut 42. Embodiment 1 has a larger adjustment range. Embodiment 1 and Embodiment 2 can be selected according to actual needs.

[0041] The first fastening nut 32 and the second fastening nut 42 are both threadedly connected to the through screw 5, and the first fastening nut 32 and the second fastening nut 42 are located on opposite sides of the adjusting assembly 2. Under the locking action of the through screw 5, the first fastening nut 32 and the second fastening nut 42 lock the bottom wedge block 3 and the adjusting wedge block 4.

[0042] The supporting steel 1 is vertically mounted on the adjusting wedge block 4, and the supporting steel 1 is perpendicular to the threaded screw 5.

[0043] A construction method for an adjustable vertical member structure for Bailey bridges, based on the adjustable vertical member structure for Bailey bridges, includes the following steps: Step A: Determine the installation position and design length of the vertical members based on the Bailey beam design drawings to ensure that the site layout meets the design requirements.

[0044] Step B: The support steel 1 and the adjustment component 2 are prepared in the factory to ensure that the adjustment range of the adjustment component 2 meets the adjustment requirements of the support steel 1. The bottom wedge block 3 and the adjustment wedge block 4 are prepared separately, and the support steel 1 is fixedly connected to the adjustment wedge block 4 by welding.

[0045] Step C: Install the adjusting component 2 at the required installation position of the Bailey beam, adjust the adjusting component to the loose state, and tighten the second fastening nut 42 according to the required height of the supporting steel 1 to adjust the position of the adjusting wedge block 4.

[0046] The adjustment component 2 consists of a bottom wedge block 3 and an adjustment wedge block 4 stacked in opposite directions. In the released state, both the bottom wedge block 3 and the adjustment wedge block 4 abut against the Bailey beam.

[0047] Step D: After the position of the support steel 1 is adjusted into place, the support steel 1 supports the Bailey beam by welding.

[0048] Step E: After the overall Bailey beam structure is formed, the adjustable vertical rod structure is dismantled. After cutting the weld between the supporting steel 1 and the Bailey beam, the adjustable vertical rod structure can be dismantled inside the Bailey beam by loosening the second fastening nut 42. At the same time, the dismantled adjustable vertical rod structure can be applied to the next working surface of the Bailey beam.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0050] Although this document frequently uses reference numerals from the figures, such as support steel 1, adjusting assembly 2, bottom wedge block 3, first through hole 31, first fastening nut 32, adjusting wedge block 4, second through hole 41, second fastening nut 42, and threaded screw 5, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. An adjustable vertical rod structure for Bailey beams, comprising a supporting steel section (1) and an adjusting assembly (2) connected to one end of the supporting steel section (1) and adjusting the axial position of the other end of the supporting steel section (1); characterized in that, The adjustment assembly (2) consists of a bottom wedge block (3) and an adjustment wedge block (4) that is lifted and installed on the bottom wedge block (3). The end of the support steel (1) is connected to the adjustment wedge block (4), and the adjustment wedge block (4) and the support steel (1) are lifted and lowered synchronously. The adjustment assembly (2) also includes a through screw (5) that is connected to both the bottom wedge block (3) and the adjustment wedge block (4). The through screw (5) is provided with a first fastening nut (32) that abuts against the bottom wedge block (3) and a second fastening nut (42) that abuts against the adjustment wedge block (4). The first fastening nut (32) and the second fastening nut (42) lock the relative position between the bottom wedge block (3) and the adjustment wedge block (4).

2. The adjustable vertical rod structure for Bailey beams according to claim 1, characterized in that, The bottom wedge block (3) and the adjusting wedge block (4) are both right-angled triangular structures with one side inclined and the two sides perpendicular, and the bottom wedge block (3) and the adjusting wedge block (4) are stacked in opposite directions with their inclined surfaces touching.

3. The adjustable vertical rod structure for Bailey beams according to claim 2, characterized in that, The inclined surface of the bottom wedge block (3) is inclined downward toward the direction of the adjusting wedge block (4), and the inclined surface of the adjusting wedge block (4) is inclined upward toward the direction of the bottom wedge block (3).

4. The adjustable vertical rod structure for Bailey beams according to claim 1, characterized in that, The bottom wedge block (3) has a first through hole (31) for loading the threaded screw (5), and the adjusting wedge block (4) has a second through hole (41) for loading the threaded screw (5). The first through hole (31) and the second through hole (41) are always in a connected state.

5. An adjustable vertical rod structure for Bailey beams according to claim 4, characterized in that, The diameters of the first through hole (31) and the second through hole (41) are both larger than the diameter of the threaded screw (5), and the threaded screw (5) is set to pass through both the first through hole (31) and the second through hole (41).

6. The adjustable vertical rod structure for Bailey beams according to claim 4, characterized in that, The diameter of the first through hole (31) is matched with the diameter of the through screw (5), and the diameter of the second through hole (41) is larger than the diameter of the through screw (5). The through screw (5) passes through both the first through hole (31) and the second through hole (41).

7. The adjustable vertical rod structure for Bailey beams according to claim 1, characterized in that, The first fastening nut (32) and the second fastening nut (42) are both threadedly connected to the threaded screw (5), and the first fastening nut (32) and the second fastening nut (42) are located on opposite sides of the adjusting assembly (2).

8. The adjustable vertical rod structure for Bailey beams according to claim 1, characterized in that, The supporting steel (1) is vertically set on the adjusting wedge block (4), and the supporting steel (1) is perpendicular to the threaded screw (5).

9. A construction method for an adjustable vertical member structure for Bailey beams, based on the adjustable vertical member structure for Bailey beams as described in any one of claims 1-8, comprising the following steps: Step A: Determine the installation position and design length of the vertical members based on the Bailey beam design drawings; Step B: The support steel (1) and the adjustment assembly (2) are prepared in the factory to ensure that the adjustment range of the adjustment assembly (2) meets the adjustment requirements of the support steel (1); Step C: Install the adjustment assembly (2) at the required installation position of the Bailey beam, adjust the adjustment assembly to the loose state, and tighten the second fastening nut (42) according to the required height of the support steel (1) to adjust the position of the adjustment wedge block (4); Step D: After the position of the supporting steel (1) is adjusted, the supporting steel (1) supports the Bailey beam by welding; Step E: After the overall structure of the Bailey beam is formed, the adjustable vertical rod structure is dismantled. After cutting the weld between the supporting steel (1) and the Bailey beam, the adjustable vertical rod structure can be dismantled inside the Bailey beam by loosening the second fastening nut (42). At the same time, the dismantled adjustable vertical rod structure can be applied to the next working surface of the Bailey beam.

10. A construction method for an adjustable vertical member structure for Bailey beams according to claim 9, characterized in that, The adjustment component (2) in step C consists of a bottom wedge block (3) and an adjustment wedge block (4) stacked in opposite directions. Both the bottom wedge block (3) and the adjustment wedge block (4) in the loosened state abut against the Bailey beam.

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