Assembly type bridge expansion joint

Abstract

The utility model discloses an assembled bridge expansion device relates to bridge engineering technical field, including first comb tooth board, one side of first comb tooth board is equipped with second comb tooth board, first comb tooth board and second comb tooth board one side all are equipped with the empty slot of embedding, the inner wall of empty slot is equipped with at least two special connecting steel bars, one end of special connecting steel bar and for with the alignment top block of the inner wall of empty slot are equipped with, and the outer wall of special connecting steel bar is equipped with the resistance pole. The utility model improves the overall structural stability of expansion device.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of bridge engineering, specifically a prefabricated bridge expansion joint. Background Technology

[0002] In bridge construction, expansion joints are key components that ensure the structural safety and functionality of bridges. However, with increasing traffic volume and the aging of bridges, traditional bridge expansion joints are gradually revealing numerous problems.

[0003] Traditional expansion joints involve complex connections between components during installation, resulting in insufficient stability. For example, common expansion joints use simple bolt or welding connections. Under the repeated action of vehicle loads and environmental corrosion over long periods, bolts are prone to loosening, and welded joints are susceptible to cracking. This leads to a decrease in the overall structural stability of the expansion joint, thereby affecting the normal use of the bridge.

[0004] Therefore, developing a new type of prefabricated bridge expansion joint is of great practical significance. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a prefabricated bridge expansion joint to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A prefabricated bridge expansion joint includes a first comb plate, a second comb plate on one side of the first comb plate, and a slot embedded on one side of both the first and second comb plates. The inner wall of the slot is provided with at least two irregularly shaped connecting steel bars, one end of the irregularly shaped connecting steel bars is provided with a top block for alignment with the inner wall of the slot, and a stop bar is sleeved on the outer wall of the irregularly shaped connecting steel bars.

[0007] Preferably, the first comb plate and the second comb plate are staggered at one end and are not in contact with each other.

[0008] Preferably, one end of the irregularly shaped connecting steel bar is provided with a bending rod one and a bending rod two, and the other end of the irregularly shaped connecting steel bar is provided with a spiral connecting end.

[0009] Preferably, one end of the alignment top block is engaged with the first bending rod and the second bending rod.

[0010] Preferably, the other end of the alignment top block is provided with an alignment groove, and the top two sides of the alignment top block are provided with multiple screw holes; A cement intrusion groove is provided between the outer wall of the alignment block and the inner wall of the empty groove.

[0011] Preferably, the two ends of the abutment are respectively sleeved on the outer wall of the irregularly shaped connecting steel reinforcement structure, and one side of the abutment is abutted against the other side wall of the alignment top block.

[0012] Preferably, the telescopic device further includes multiple reinforcing bars, connecting and fixing bars, and a cement mixture for reinforcing and filling.

[0013] Preferably, the reinforcing steel bar is disposed on one side of the irregular connecting steel bar, and the connecting and fixing steel bar passes through one end of the irregular connecting steel bar.

[0014] In summary, this technical solution has the following main advantages: This utility model of a prefabricated bridge expansion joint enhances the connection strength and stability between components by incorporating irregularly shaped connecting steel bars, alignment blocks, and abutment rods. The special shape design of the irregularly shaped connecting steel bars and their snap-fit ​​connection with the alignment blocks make the connection more reliable, effectively resisting repeated vehicle loads, reducing the possibility of loosening or damage at the connection points, and improving the overall structural stability of the expansion joint. Attached Figure Description

[0015] Figure 1 This is a schematic plan view of the overall structure of this utility model; Figure 2 This is an isometric schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram showing the position of the abutment and the irregularly shaped connecting steel reinforcement structure of this utility model; Figure 4 This is an exploded view of the structure of this utility model; Figure 5 This is a schematic diagram showing the position of the irregularly shaped connecting steel bars and the alignment top block structure of this utility model.

[0016] Figure descriptions: 10. First comb plate; 11. Second comb plate; 12. Hollow groove; 13. Irregular connecting steel bar; 14. Alignment top block; 15. Support rod; 131. Bending rod one; 132. Bending rod two; 133. Spiral connecting end; 141. Alignment groove; 142. Screw hole; 16. Reinforcing steel bar; 17. Connecting and fixing steel bar. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] Example like Figures 1 to 5As shown, a prefabricated bridge expansion joint includes a first comb plate 10, a second comb plate 11 on one side of the first comb plate 10, and slots 12 embedded on one side of both the first comb plate 10 and the second comb plate 11. At least two irregularly shaped connecting steel bars 13 are provided on the inner wall of the slots 12. One end of the irregularly shaped connecting steel bars 13 is provided with a top block 14 for alignment with the inner wall of the slots 12, and a stop bar 15 is sleeved on the outer wall of the irregularly shaped connecting steel bars 13.

[0019] The first comb plate 10 and the second comb plate 11 are staggered at one end and are not in contact with each other.

[0020] The irregular connecting steel bar 13 has a bending rod 131 and a bending rod 132 at one end, and a spiral connecting end 133 at the other end.

[0021] One end of the alignment block 14 is engaged with the bending rod 131 and the bending rod 132.

[0022] The other end of the alignment top block 14 is provided with an alignment groove 141, and the top two sides of the alignment top block 14 are provided with multiple screw holes 142. A cement intrusion groove is provided between the outer wall of the alignment block 14 and the inner wall of the empty groove 12.

[0023] The two ends of the abutment 15 are respectively sleeved on the outer wall of the irregular connecting steel bar 13 structure, and one side of the abutment 15 is abutted against the other side wall of the alignment top block 14.

[0024] The expansion joint also includes multiple reinforcing steel bars 16, connecting and fixing steel bars 17, and a cement mixture for reinforcing filling.

[0025] The reinforcing steel bar 16 is placed on one side of the irregular connecting steel bar 13, and the connecting and fixing steel bar 17 passes through one end of the irregular connecting steel bar 13.

[0026] It should be noted that, in this embodiment, preparations before installation... Materials: Prepare all components including the first comb plate 10, the second comb plate 11, the irregular connecting steel bars 13, the alignment top block 14, the abutment rod 15, the reinforcing steel bars 16, the connecting and fixing steel bars 17, and the cement mixture for reinforcement and filling, and ensure that the quality of the materials meets the design requirements.

[0027] Tools: Prepare installation tools such as electric drill, wrench, level, tape measure, and trowel, and ensure that the tools are complete and in good working order.

[0028] A detailed survey of the bridge expansion joint location was conducted, and the width, length, and other dimensional parameters of the expansion joint were measured. Based on the measurement results, the installation position and spacing of the first comb plate 10 and the second comb plate 11 were determined to ensure that the installation position was accurate.

[0029] At the pre-defined installation positions on the first comb plate 10 and the second comb plate 11, installation grooves are created using specialized tools. During the creation process, the verticality and flatness of the grooves are ensured, with errors controlled within a minimal range to guarantee the stability of subsequent installation.

[0030] After the groove is opened, use a high-pressure air gun and cleaning brush to thoroughly clean the inside of the groove, removing dust, debris, etc., to ensure that the inner wall of the groove is clean and dry, providing a good foundation for subsequent installation.

[0031] The other end of the alignment top block 14 is fitted with an alignment groove 141, which is aligned with the alignment marks set on the bridge structure in advance to ensure that the installation position of the alignment top block 14 is accurate. At the same time, holes are drilled at the screw holes 142 on both sides of the top of the alignment top block 14 using an electric drill, and then screws are inserted and tightened to firmly fix the alignment top block 14 in the corresponding position.

[0032] Remove the irregularly shaped connecting steel bar 13 and check whether its appearance and dimensions meet the requirements. The irregularly shaped connecting steel bar 13 has a bent rod 131 and a bent rod 132 at one end and a spiral connecting end 133 at the other end. This special shape design helps to enhance the stability of the connection.

[0033] One end of the irregular connecting steel bar 13 with the first bending rod 131 and the second bending rod 132 is snapped onto both sides of the alignment block 14 to initially fix the position of the irregular connecting steel bar 13. Since the irregular connecting steel bar 13 is provided with a stop rod 15, the size of the stop rod 15 is adapted to the irregular connecting steel bar 13.

[0034] Adjust the position of the abutment 15 so that one side of it is in close contact with the other side wall of the alignment block 14. The installation of the abutment 15 further enhances the connection stability between the irregular connecting steel bar 13 and the alignment block 14, forming an integrated structural system that effectively resists the action of external loads.

[0035] Use a level and measuring tape to precisely adjust the verticality and horizontal position of the irregularly shaped connecting steel bar 13 to ensure that its installation position is accurate and meets the design requirements. After adjustment, check the fixing of the irregularly shaped connecting steel bar 13 again to ensure that it is firm and stable.

[0036] The first comb plate 10 and the second comb plate 11 are hoisted to their respective installation positions and slowly lowered. Using the alignment groove 141 on the alignment top block 14 as a reference, the positions of the first comb plate 10 and the second comb plate 11 are precisely adjusted. The first comb plate 10 and the second comb plate 11 are staggered at one end and not in contact with each other. The staggered spacing is controlled according to the design requirements to ensure accurate installation. At the same time, temporary support devices are used to fix the comb plates to prevent them from shifting during subsequent installation.

[0037] The reinforcing steel bar 16 is placed in a pre-drilled hole on one side of the irregular connecting steel bar 13, and then the connecting and fixing steel bar 17 is passed through it. The connecting and fixing steel bar 17, the reinforcing steel bar 16 and the irregular connecting steel bar 13 are firmly connected together by welding or binding. The setting of the connecting and fixing steel bar 17 and the reinforcing steel bar 16 enhances the strength and rigidity of the entire connection structure and improves the stability of the device.

[0038] Prepare the cement mixture for reinforcement and filling. Mix the cement, sand, gravel, additives and other materials evenly according to the design requirements to ensure that the performance of the cement mixture meets the standards.

[0039] Use a trowel to fill the prepared cement mixture into the cement intrusion groove between the outer wall of the alignment block 14 and the inner wall of the empty groove 12, as well as other areas that need filling. During the filling process, ensure that the cement mixture is compacted and without gaps to enhance the waterproof performance and overall stability of the device. After filling, smooth the surface to make it level with the surrounding structure.

[0040] A comprehensive visual inspection was conducted on the installed prefabricated bridge expansion joints to check whether each component was properly installed, whether there was any looseness or deformation, whether the surface was flat and smooth, and whether the cement mixture filling was dense. Any problems found were rectified promptly to ensure that the appearance quality of the joints met the requirements.

[0041] The telescopic function of the expansion joint is debugged to simulate the expansion and contraction deformation of the bridge under different temperature and load conditions. The first comb plate 10 and the second comb plate 11 are checked to see if they can expand and contract freely and whether the expansion and contraction process is smooth and without jamming.

[0042] Check the waterproof performance of the device by conducting a water spray test at the expansion joints and observing for any leaks. If leaks are found, promptly identify the cause and take appropriate action to ensure the device maintains good waterproof performance.

[0043] The stability of the telescopic device is tested using specialized testing equipment, examining its deformation and stress distribution under vehicle loads to ensure that the device's stability meets design requirements. If the test results do not meet the requirements, the device is further reinforced and adjusted until it meets the qualification standards.

[0044] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A prefabricated bridge expansion joint, characterized in that, It includes a first comb plate (10), a second comb plate (11) is provided on one side of the first comb plate (10), and a slot (12) is embedded on one side of both the first comb plate (10) and the second comb plate (11). At least two irregular connecting steel bars (13) are provided on the inner wall of the slot (12). One end of the irregular connecting steel bar (13) is provided with a top block (14) for alignment with the inner wall of the slot (12), and a stop bar (15) is sleeved on the outer wall of the irregular connecting steel bar (13).

2. The prefabricated bridge expansion joint according to claim 1, characterized in that, The first comb plate (10) and the second comb plate (11) are staggered at one end and are not in contact with each other.

3. The prefabricated bridge expansion joint according to claim 1, characterized in that, One end of the irregular connecting steel bar (13) is provided with a bending rod one (131) and a bending rod two (132), and the other end of the irregular connecting steel bar (13) is provided with a spiral connecting end (133).

4. A prefabricated bridge expansion joint according to claim 3, characterized in that, One end of the alignment block (14) is engaged with the first bending rod (131) and the second bending rod (132).

5. A prefabricated bridge expansion joint according to claim 1, characterized in that, The other end of the alignment top block (14) is provided with an alignment groove (141), and the top two sides of the alignment top block (14) are provided with multiple screw holes (142). A cement intrusion groove is provided between the outer wall of the alignment top block (14) and the inner wall of the empty groove (12).

6. A prefabricated bridge expansion joint according to claim 1, characterized in that, The two ends of the abutment (15) are respectively sleeved on the outer wall of the irregular connecting steel bar (13) structure, and one side of the abutment (15) abuts against the other side wall of the alignment top block (14).

7. A prefabricated bridge expansion joint according to claim 1, characterized in that, The expansion joint also includes multiple reinforcing steel bars (16), connecting and fixing steel bars (17), and a cement mixture for reinforcing filling.

8. A prefabricated bridge expansion joint according to claim 7, characterized in that, The reinforcing steel bar (16) is disposed on one side of the irregular connecting steel bar (13), and the connecting and fixing steel bar (17) passes through one end of the irregular connecting steel bar (13).

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