A bridge expansion joint positioning fixture, a bridge expansion joint and a bridge

Abstract

A bridge expansion joint positioning fixture is disclosed, relating to the field of bridge construction technology. To address the technical shortcomings of existing bridge expansion joint construction methods, such as difficulty in ensuring construction accuracy and low efficiency due to manual positioning, this utility model provides the following solution: It includes: a steel plate with multiple first holes for installing expansion joint positioning boxes and expansion joint anchor bolts, and multiple second holes for connecting to a channel steel; a channel steel, arranged along the length of the steel plate, with through holes corresponding to the second holes; multiple bolt assemblies, each bolt assembly including bolts, nuts, spring washers, and round steel tubes fitted onto the bolts, used for detachably connecting the steel plate and the channel steel, with the round steel tubes located between the steel plate and the channel steel to control their spacing and elevation; multiple expansion joint positioning boxes and expansion joint anchor bolts are installed in the first holes of the steel plate and used for welding and fixing to the pre-embedded portal reinforcement and fixed steel bars in the beam bottom of the bridge structure.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a bridge expansion joint positioning fixture. Background Technology

[0002] Bridge expansion joints, as key nodes connecting adjacent spans or abutments to the main bridge structure, primarily function to accommodate structural displacements caused by temperature changes, load deformation, shrinkage, and creep, ensuring bridge deck continuity and smooth traffic flow. Expansion joints typically consist of anchor bolts, displacement devices, water-stop structures, and toothed plates. Among these, the anchor bolts and displacement devices, as the core internal structures, directly affect the installation accuracy and service life of the expansion joint.

[0003] Currently, in bridge expansion joint construction, the installation of anchor bolts and displacement devices still mainly relies on manual measurement and positioning, and point welding, lacking standardized positioning tools. Especially in large-scale bridge projects, manual positioning has the following shortcomings:

[0004] Construction accuracy is difficult to guarantee: Traditional manual methods such as measuring tape and ink line are used for measurement and layout. However, worker errors can easily lead to deviations in the position of displacement devices and bolts, resulting in difficulties in assembling the comb plate or making it impossible to install.

[0005] Low construction efficiency and high rework rate: Inaccurate positioning requires rework, such as adjustment, cutting, and re-welding, which seriously affects the construction progress and cost control.

[0006] Poor structural stability in the later stages: Installation errors can lead to problems such as abnormal noise, misalignment, and local loosening during the operation of expansion joints, affecting the smoothness of vehicle driving and the safety of bridges.

[0007] Lack of reusable standardized positioning devices: Most projects use temporary self-made supports or simple templates, which cannot guarantee the consistency and reusability of construction of each bridge section.

[0008] For example, in some highway bridge construction cases, the comb plate failed to be assembled smoothly and the anchor bolts had to be adjusted multiple times before the installation was completed, delaying the construction period by several days and leaving structural risks.

[0009] Therefore, the existing bridge expansion joint construction methods generally suffer from the following technical problems: the lack of a reasonable structure, detachable and reusable, compatible with various types of comb plates, and high positioning accuracy expansion joint anchor bolts and displacement device positioning fixtures. Utility Model Content

[0010] To address the shortcomings of existing bridge expansion joint construction techniques, such as difficulty in ensuring construction accuracy and low efficiency due to manual positioning, this utility model provides the following technical solution:

[0011] A bridge expansion joint positioning fixture, comprising:

[0012] A steel plate has multiple first holes for installing expansion joint displacement boxes and expansion joint anchor bolts, and multiple second holes for connecting with channel steel.

[0013] Multiple channel steels are arranged along the length of the steel plate, and through holes corresponding to the second hole position are provided on the channel steels;

[0014] Multiple bolt assemblies, including M20*130 bolts, M20 nuts, M20 spring washers, and M30 round steel tubes fitted on the bolts, are used to detachably connect steel plates and channel steel. The M30 round steel tubes are located between the steel plates and channel steel to control their spacing and elevation.

[0015] Multiple expansion joint displacement boxes and expansion joint anchor bolts are installed in the first hole of the steel plate and used to weld and fix them to the pre-embedded portal reinforcement and fixed reinforcement in the bottom of the beam in the bridge structure.

[0016] Furthermore, a preferred embodiment is provided, which also includes a plurality of temporary connecting bolts for temporarily positioning the expansion joint displacement box and the expansion joint anchor bolts before welding.

[0017] Furthermore, a preferred embodiment is provided, wherein the steel plate is a Q235 steel plate.

[0018] Furthermore, a preferred embodiment is provided, wherein the channel steel is #63 channel steel.

[0019] Furthermore, a preferred embodiment is provided, wherein the steel plate has a size of 1390mm*830mm, and two weight-reducing holes are symmetrically opened inside it, each weight-reducing hole having a size of 610mm*470mm.

[0020] Furthermore, a preferred embodiment is provided, wherein the first hole position includes 6 vertical columns and 4 horizontal rows, totaling 24 holes, with a hole diameter of Φ21mm.

[0021] Furthermore, a preferred embodiment is provided, wherein the second hole position includes 3 vertical columns and 4 horizontal rows, totaling 12 holes with a diameter of Φ21mm, which correspond one-to-one with the through holes on the channel steel.

[0022] Furthermore, a preferred embodiment is provided, wherein each channel steel is 2750mm long and has 8 through holes, which are arranged sequentially at intervals of 1000mm, 90mm, 570mm and 90mm respectively.

[0023] Based on the same inventive concept, this utility model also provides a bridge expansion joint, including the aforementioned positioning fixture device.

[0024] Based on the same inventive concept, this utility model also provides a bridge, including the aforementioned expansion joint.

[0025] Compared with the prior art, the advantages of the technical solution provided by this utility model are as follows:

[0026] The tooling steel plate features a multi-row standardized hole structure, allowing for the pre-installation of expansion joint displacement boxes and anchor bolts. This avoids positional errors caused by traditional manual marking and distance measurement, ensuring that the spatial position and elevation of the internal components of the expansion joint are accurate from the start. Compared to the template layout methods commonly used in traditional construction, this structure significantly improves positioning accuracy, reduces the probability of rework, and ensures smooth assembly of the comb plate later on.

[0027] The tooling steel plate is bolted to three channel steels, and a uniform length of round steel pipe is added between them as a spacing control component, ensuring the stability and consistency of the entire tooling structure in both horizontal and vertical elevations. This elevation control method is extremely rare in existing technologies, effectively overcoming the problem of easy deformation of template welding or wooden reference boards, and ensuring that components do not shift due to uneven board surfaces or loose connections during the welding process.

[0028] Before construction, the displacement box and anchor bolts are temporarily fixed to the tooling steel plate with nuts, and then transported as a whole to the construction area for welding with the pre-embedded reinforcement of the beam. This "pre-assembly + overall positioning" method replaces the inefficient traditional single-point handling and piece-by-piece welding method, significantly shortening the installation time and reducing the risk of operational errors in high-altitude and confined environments.

[0029] The channel steel structure serves the dual function of skeletal support and transport guide rail, enabling the entire fixture to be quickly moved and disassembled after positioning, while possessing excellent rigidity and reusability. Compared to traditional disposable formwork structures, this solution not only has a high reusability rate but also facilitates standardized operations in multiple or batch bridge projects, reducing construction equipment costs.

[0030] By simplifying and standardizing the overall design of the tooling structure, this solution enables rapid adaptation and replacement of components for different types of expansion joints, such as the 160 type. Compared to the previous method of customizing templates for different bridge and joint types, this solution significantly reduces construction preparation time and design burden, while improving adaptability and universality.

[0031] Once the expansion joint is positioned, the fixtures can be immediately disassembled to proceed to the next section of construction, ensuring the continuity and efficiency of the entire bridge deck construction. Traditional construction requires waiting for multiple manual confirmations and corrections, which can easily lead to lengthy cycles. This solution significantly improves the construction pace and the efficiency of expansion joint delivery.

[0032] It is suitable for the precise positioning and efficient installation of expansion joint displacement boxes and anchor bolts during the construction of bridge expansion joints. Attached Figure Description

[0033] Figure 1 Schematic diagram of the expansion joint positioning fixture;

[0034] Figure 2 This diagram illustrates the structure for installing anchor bolts and displacement boxes during the construction of this device.

[0035] Figure 3 Schematic diagram of the positioning fixture.

[0036] Figure 4 Side view of the positioning fixture.

[0037] Figure 5 Elevation diagram of the positioning fixture.

[0038] Figure 6 Dimensional diagram of the steel plate.

[0039] Figure 7 Schematic diagram of steel plate planar processing.

[0040] Figure 8 Schematic diagram of channel steel processing.

[0041] Figure 9 Construction diagram of tooling.

[0042] Figure 10 This is a schematic diagram of a normal expansion joint after completion.

[0043] Among them, 1-Q235 steel plate, 2-#63 channel steel, 3-M20*130 bolt, 4-M20 nut, 5-M20 spring washer, 6-M30 round steel pipe, 7-expansion joint displacement box, 8-expansion joint anchor bolt, 9-beam bottom embedded door-shaped reinforcement, 10-fixed reinforcement, 11-temporary connection bolt. Detailed Implementation

[0044] To make the advantages and benefits of the technical solution provided by this utility model clearer, the technical solution provided by this utility model will now be described in further detail with reference to the accompanying drawings. Specifically:

[0045] Implementation Method 1: This implementation method provides a bridge expansion joint positioning fixture, comprising:

[0046] A steel plate has multiple first holes for installing the expansion joint displacement box 7 and the expansion joint anchor bolts 8, and multiple second holes for connecting with the channel steel.

[0047] Multiple channel steels are arranged along the length of the steel plate, and through holes corresponding to the second hole position are provided on the channel steels;

[0048] Multiple bolt assemblies, including M20*130 bolts 3, M20 nuts 4, M20 spring washers 5, and M30 round steel tubes 6 fitted on the bolts, are used to detachably connect the steel plate and the channel steel. The M30 round steel tubes 6 are located between the steel plate and the channel steel to control their spacing and elevation.

[0049] Multiple expansion joint displacement boxes 7 and expansion joint anchor bolts 8 are installed in the first hole of the steel plate and are used to weld and fix to the pre-embedded portal reinforcement and fixed reinforcement in the bottom of the beam in the bridge structure.

[0050] It also includes multiple temporary connecting bolts for temporarily positioning the expansion joint displacement box 7 and the expansion joint anchor bolts 8 before welding.

[0051] The steel plate is Q235 steel plate 1.

[0052] The channel steel is #63 channel steel 2.

[0053] The steel plate measures 1390mm x 830mm and has two symmetrical weight-reduction holes inside, each measuring 610mm x 470mm.

[0054] The first hole position includes 6 vertical columns and 4 horizontal rows, totaling 24 holes with a diameter of Φ21mm.

[0055] The second hole position includes 3 vertical columns and 4 horizontal rows, totaling 12 holes with a diameter of Φ21mm, which correspond one-to-one with the through holes on the channel steel.

[0056] Each channel steel is 2750mm long and has 8 through holes, which are arranged sequentially at intervals of 1000mm, 90mm, 570mm and 90mm respectively.

[0057] Implementation Method Two: This implementation method is a further detailed description of the technical solution provided in Implementation Method One, specifically:

[0058] Combined with appendix Figures 1 to 10 The following is a detailed description of a bridge expansion joint positioning fixture provided by this utility model.

[0059] The device mainly includes: Q235 steel plate 1, #63 channel steel 2, M20*130 bolts 3, M20 nuts 4, M20 spring washers 5, M30 round steel pipes 6, expansion joint displacement box 7, expansion joint anchor bolts 8, pre-embedded door-shaped reinforcement bars at the bottom of the beam 9, fixed reinforcement bars 10, and temporary connecting bolts 11.

[0060] Q235 steel plate 1

[0061] The Q235 steel plate 1 is a single rectangular tooling plate with dimensions of 1390mm*830mm and is made of Q235 steel. To reduce weight, two rectangular weight-reduction holes of 610mm*470mm are symmetrically cut in the middle of the Q235 steel plate 1. The Q235 steel plate 1 has 36 standard circular holes of Φ21mm, of which 12 are used to connect with the #63 channel steel 2, and 24 are used to install the expansion joint displacement box 7 and the expansion joint anchor bolts 8. The holes are arranged in 6 vertical columns and 4 horizontal rows, with a column spacing of 250mm and a row spacing of 90mm to ensure positioning accuracy.

[0062] #63 Channel Steel 2

[0063] The #63 channel steel 2 consists of three pieces, arranged side by side above the Q235 steel plate 1, serving as structural support and guiding for handling. Each #63 channel steel 2 is 2750mm long and has eight Φ21mm mounting holes along its length, spaced 1000mm, 90mm, 570mm, and 90mm apart, respectively, all centrally located and corresponding to the connection holes on the Q235 steel plate 1.

[0064] 3. M20*130 bolts; 4. M20 nuts; 5. M20 spring washers; 6. M30 round steel pipes.

[0065] The Q235 steel plate 1 and the #63 channel steel 2 are fixed by 12 sets of connecting components, which include: M20*130 bolts 3, M20 nuts 4, M20 spring washers 5, and M30 round steel pipes 6. The M30 round steel pipes 6 are of uniform length and are installed between the Q235 steel plate 1 and the #63 channel steel 2 to control the elevation and maintain consistent spacing.

[0066] Bolt 3 is inserted from above the #63 channel steel 2, and passes through the mounting holes of M30 round steel pipe 6 and Q235 steel plate 1 in sequence. M20 spring washer 5 and M20 nut 4 are then fitted onto the bottom and tightened to form a firm and detachable structural connection.

[0067] Expansion joint displacement box 7 and expansion joint anchor bolt 8

[0068] On the surface of Q235 steel plate 1, the expansion joint displacement box 7 and the expansion joint anchor bolts 8 are installed in the corresponding holes in the upper and lower rows according to the design hole positions, and temporarily fixed with M20 nuts 4. This structure allows for pre-assembly before installation and overall hoisting and positioning during construction.

[0069] 9. Pre-embedded portal reinforcement bars at the bottom of the beam; 10. Fixed reinforcement bars; 11. Temporary connecting bolts

[0070] Pre-embedded portal reinforcement bars 9 and fixing reinforcement bars 10 are embedded inside the bridge beam body at the bottom of the beam for welding connection with expansion joint anchor bolts 8 and expansion joint displacement boxes 7. During the positioning welding process, preliminary fixation is achieved by temporary connecting bolts 11 to prevent displacement before welding.

[0071] Instructions for use

[0072] Construction workers cleaned the expansion joint area, exposed and corrected the pre-embedded door-shaped reinforcement 9 and fixed reinforcement 10 at the bottom of the beam;

[0073] Select the corresponding bridge expansion joint positioning fixture based on the design model;

[0074] The Q235 steel plate 1, which has been installed with the expansion joint displacement box 7 and the expansion joint anchor bolts 8, is assembled with the #63 channel steel 2 to form a complete tooling.

[0075] Move the tooling and place it at the construction site, then secure it with temporary connecting bolts 11;

[0076] The expansion joint anchor bolt 8 and the expansion joint displacement box 7 are respectively welded to the pre-embedded door-shaped reinforcement 9 and the fixed reinforcement 10 at the bottom of the beam.

[0077] After welding is completed, the entire tooling is dismantled and transferred to the next section for continued use.

[0078] After all sections are completed, the expansion joint concrete is poured and the comb plate is installed to ensure the integrity of the bridge deck structure and the accuracy of construction.

[0079] This bridge expansion joint positioning fixture uses a standardized platform formed by Q235 steel plate 1 and #63 channel steel 2, combined with an M30 round steel pipe 6 elevation control structure, to achieve precise positioning of the expansion joint anchoring components, avoiding traditional manual errors. The connection structure uses M20*130 bolts 3 with M20 nuts 4 and M20 spring washers 5 to form a robust and detachable connection, possessing high turnaround and site adaptability. A unified welding system is formed by the pre-installed expansion joint displacement box 7 and expansion joint anchor bolts 8, along with the pre-embedded portal reinforcement 9, fixed reinforcement 10, and temporary connecting bolts 11 at the bottom of the beam, significantly improving construction efficiency, positioning accuracy, and subsequent reliability.

[0080] Implementation Method 3: Combination Figure 1-10 This embodiment will be described in further detail through specific examples:

[0081] It is composed of a tooling steel plate of Q235, three channel steels of #63, twelve bolts of M20*130, twelve nuts of M20, twelve spring washers of M20, and twelve round steel pipes of M30 connected in sequence;

[0082] The tooling steel plate is made of Q235 material. An 830*1390mm steel plate is laser-cut, and two smaller 470*610mm steel plates are symmetrically cut inside the original plate to reduce weight. Figure 6 )

[0083] The channel steel is selected as #63 channel steel 2, the length of the channel steel is 2.75m, and each channel steel has 4 holes with a diameter of 21mm.

[0084] The tooling steel plate is connected to the channel steel by M20*130 bolts 3 and fixed with nuts. Spring washers are provided to ensure that the tooling steel plate is flat and free from deformation.

[0085] The tooling steel plates and channel steels are separated by M30 round steel pipes, each round steel pipe having the same size and being evenly distributed;

[0086] The steel plate is fixed to the channel steel with bolts. Workers lift the three channel steels to control the steel plate and install the anchor bolts and positioners for the expansion joint.

[0087] This device is easy to assemble and disassemble, facilitating modular installation, disassembly, and subsequent storage. It occupies little space, can be reused, and provides precise positioning for expansion joint anchors and positioners, improving construction quality and reducing subsequent maintenance costs.

[0088] Refer to the attached diagram in the instruction manual. Figure 1 Schematic diagram of the expansion joint positioning fixture Figure 2 A structural diagram illustrating the installation of anchor bolts and displacement boxes during the construction of this device. Figure 3 Schematic diagram of positioning tooling Figure 4 Side view of positioning fixture Figure 5 Elevation diagram of positioning tooling Figure 6 Steel plate dimension diagram Figure 7 Schematic diagram of steel plate planar processing Figure 8 Schematic diagram of channel steel processing Figure 9 Tooling construction diagram, Figure 10 This is a schematic diagram of a normal expansion joint. It includes: one Q235 steel plate (1-1), three #63 channel steels (2-2), twelve M20*130 bolts (3-3), twelve M20 nuts (4-4), twelve M20 spring washers (5-5), twelve M30 round steel pipes (6-6), an expansion joint displacement box (7-7), expansion joint anchor bolts (8-8), pre-embedded reinforcing bars at the bottom of the beam (9-9), fixed reinforcing bars (9-10), and temporary connecting bolts (10-11).

[0089] After the asphalt pavement is laid and the conditions for expansion joint construction are met, the construction workers first cut the asphalt groove according to the location and clean it. Then, they restore the steel bars embedded in the beam. According to the size of the expansion joint design, they select the corresponding comb plate model and the corresponding positioning tool. Common comb plate models include 80 type, 120 type, 160 type, 240 type, etc.

[0090] This embodiment explains the implementation method using a 160-type expansion joint comb plate.

[0091] Cut the tooling steel plate 1 to a length of 1390mm and a width of 830mm. With the long side centered and each side offset by 50mm, and the short side centered, cut out two small steel plates with dimensions of 470mm*610mm. Figure 6 .

[0092] Based on the pre-cut steel plate, vertically cut three rows of holes for connection with the channel steel, four holes in each row, for a total of 12 holes, each 21mm in diameter. Using the long side as a reference, the center axis is the first row, with 500mm offset to each side forming the second and third rows. Horizontally, using the long side as the edge, the first row of holes is cut 40mm inward from the edge. The second row of holes is cut 90mm inward from the first row. The third and fourth rows are symmetrically positioned and cut with the short side center axis as a reference, symmetrically positioned with the first and second rows. All 12 holes for connection with the channel steel are then located. Figure 7 .

[0093] The holes for connecting the anchor bolts and the displacement box are further processed based on the above cutting, resulting in 24 holes in 6 vertical columns and 4 horizontal rows, all with a diameter of 21mm. The first vertical column is 70mm from the short edge, and the other five columns are evenly distributed with the first column as the edge, each column spaced 250mm apart. The first horizontal row of holes is 40mm inward from the long edge. The second row of holes is 90mm inward from the first row as a reference. The third and fourth rows are symmetrically positioned and cut with the short side centerline as a reference, symmetrically positioned with respect to the first and second rows. All 24 holes for connecting to the channel steel are located. Figure 7 .

[0094] Three #63 channel steel sections, each 2750mm long, were cut. A total of eight holes, each 21mm in diameter, were cut into the channel steel legs. The first hole was 1000mm from the end; the second hole was 90mm from the first; the third hole was 570mm from the second; and the fourth hole was 90mm from the third. All holes were centered. Figure 8 .

[0095] The processed channel steel and steel plate are assembled from top to bottom using 12 M20*130 bolts, 12 3cm long M30 round steel pipes, 12 M20 nuts, and 12 M20 spring washers. The round steel pipes are positioned between the channel steel and the steel plate to control the elevation. Figure 5 .

[0096] The first group of 6 displacement boxes and 12 anchor bolts are connected to the holes in the tooling steel plate and fixed with nuts. The displacement boxes and anchor bolts are temporarily fixed in the upper and lower rows of holes in the tooling steel plate.

[0097] After assembling the tooling, displacement box, and anchor bolts to be welded, place them together into the expansion joint trench. Fix them according to the starting point, and then weld the anchor bolts and displacement box to the pre-embedded steel bars in the beam. Figure 2 .

[0098] After one set of anchor bolts and positioners is welded, the fixture is removed for the second set, and so on, until all expansion joints are welded before assembling the comb plate. Figure 9 .

[0099] Once the comb-tooth plates are pre-assembled, the expansion joint concrete is poured to achieve a satisfactory flatness of the comb-tooth plates. Figure 10 .

[0100] The above description of the technical solution provided by this utility model through several specific embodiments is intended to highlight the advantages and benefits of the technical solution provided by this utility model. However, the above-described specific embodiments are not intended to limit this utility model. Any reasonable modifications and improvements to this utility model, combinations of embodiments, and equivalent substitutions based on the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bridge joint positioning tooling device, characterized by, include: A steel plate has multiple first holes for installing expansion joint displacement boxes and expansion joint anchor bolts, and multiple second holes for connecting with channel steel. Multiple channel steels are arranged along the length of the steel plate, and through holes corresponding to the second hole position are provided on the channel steels; Multiple bolt assemblies, including M20*130 bolts, M20 nuts, M20 spring washers, and M30 round steel tubes fitted on the bolts, are used to detachably connect steel plates and channel steel. The M30 round steel tubes are located between the steel plates and channel steel to control their spacing and elevation. Multiple expansion joint displacement boxes and expansion joint anchor bolts are installed in the first hole of the steel plate and used to weld and fix them to the pre-embedded portal reinforcement and fixed reinforcement in the bottom of the beam in the bridge structure.

2. The bridge expansion joint positioning tooling device of claim 1, wherein, It also includes multiple temporary connecting bolts for temporarily positioning the expansion joint displacement box and expansion joint anchor bolts before welding.

3. The bridge expansion joint positioning fixture according to claim 1, characterized in that, The steel plate is Q235 steel plate.

4. The bridge expansion joint positioning fixture according to claim 1, characterized in that, The channel steel is #63 channel steel.

5. A bridge expansion joint positioning fixture according to claim 1, characterized in that, The steel plate measures 1390mm x 830mm and has two symmetrical weight-reduction holes inside, each measuring 610mm x 470mm.

6. The bridge expansion joint positioning fixture according to claim 1, characterized in that, The first hole position includes 6 vertical columns and 4 horizontal rows, totaling 24 holes with a diameter of Φ21mm.

7. The bridge expansion joint positioning fixture according to claim 1, characterized in that, The second hole position includes 3 vertical columns and 4 horizontal rows, totaling 12 holes with a diameter of Φ21mm, which correspond one-to-one with the through holes on the channel steel.

8. The bridge expansion joint positioning fixture according to claim 1, characterized in that, Each channel steel is 2750mm long and has 8 through holes, which are arranged sequentially at intervals of 1000mm, 90mm, 570mm and 90mm respectively.

9. A bridge expansion joint, characterized in that, Includes the positioning fixture device as described in claim 1.

10. A bridge, characterized in that, Including the expansion joint as described in claim 9.

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