Bridge expansion joint facilitating replacement of sealing strip

Abstract

The utility model discloses a bridge expansion joint convenient to replace sealing rubber strip relates to bridge engineering technical field, including first comb tooth and second comb tooth, first comb tooth and second comb tooth staggered setting, constitute have through seam no.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of bridge engineering, specifically a bridge expansion joint that facilitates the replacement of sealing strips. Background Technology

[0002] Bridge expansion joints are an important component of bridge structures. Their main function is to accommodate the expansion and contraction deformation of bridges caused by factors such as temperature changes, concrete shrinkage and creep, and vehicle loads, thereby ensuring the integrity of the bridge structure and driving safety and comfort.

[0003] Traditional bridge expansion joints are mostly sealed with ordinary rubber sealing strips. However, these ordinary sealing strips have revealed many problems in actual use. On the one hand, their structural design is unreasonable, and their fit with the expansion joint is not high. During the expansion and deformation of the bridge, the sealing strips are easily subjected to tensile and compressive forces, leading to cracks and detachment, thus losing their sealing effect. This allows moisture and debris to easily enter the expansion joint, corroding the bridge structure and reducing the bridge's service life. On the other hand, replacing ordinary sealing strips is difficult, usually requiring specialized equipment and a large amount of manpower. Moreover, the replacement process can easily damage the surrounding structure of the expansion joint, increasing maintenance costs and construction difficulty.

[0004] Furthermore, the sealing structures of some bridge expansion joints do not adequately consider the usage requirements under different environmental conditions. In high-temperature environments, ordinary sealing strips may soften and deform, failing to provide an effective seal; in low-temperature environments, they may become brittle and crack, similarly affecting sealing performance. Moreover, under prolonged exposure to ultraviolet radiation and chemical corrosion, the performance of the sealing strips will gradually decline, further shortening their service life. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a bridge expansion joint that facilitates the replacement of sealing strips, so as 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 bridge expansion joint that facilitates the replacement of sealing strips includes a first comb tooth and a second comb tooth, which are arranged alternately to form a through joint one and a through joint two. A rubber block is embedded in the inner wall of the through joint one, and an edge strip is embedded in the inner wall of the through joint two. A square groove is embedded in the bottom of the rubber block, and a sheet rubber plate is provided on the top of the rubber block.

[0007] Preferably, the first through joint and the second through joint form a continuous S-shaped expansion joint.

[0008] Preferably, the rubber block has side strips on both sides of one end.

[0009] Preferably, one end of the edge strip has an inclined surface.

[0010] Preferably, the plurality of the adhesive blocks, edge strips, and sheet adhesive plates constitute an integral sealing strip.

[0011] Preferably, a sealing strip is provided on the top of both the first comb tooth and the second comb tooth, and the two sealing strips are not in contact when the first comb tooth and the second comb tooth are not under stress.

[0012] Preferably, the bottom of the adhesive block has a V-shaped cut surface.

[0013] In summary, this technical solution has the following main advantages: This invention addresses the problem of traditional sealing strips, which are prone to cracking and detachment during bridge expansion and contraction, allowing moisture and debris to enter the expansion joint and corrode the bridge structure. The invention solves this problem by designing a continuous, S-shaped expansion joint sealing structure with staggered first and second comb teeth forming a through-joint. Adhesive blocks, edge strips, and sheet-like adhesive plates are strategically embedded in the inner wall of this through-joint. This structure better adapts to bridge expansion and contraction, enhances the fit between the sealing strip and the expansion joint, effectively prevents moisture and debris from entering, improves sealing performance, protects the bridge structure from corrosion, and extends the bridge's service life. Attached Figure Description

[0014] Figure 1 This is an isometric schematic diagram of the overall structure of this utility model; Figure 2 This is an isometric view of the overall structure of this utility model. Figure 3 This is an isometric schematic diagram of the adhesive block, edge strip, and sheet adhesive plate of this utility model; Figure 4 This is a planar schematic diagram of the adhesive block, edge strip, and sheet adhesive plate of this utility model.

[0015] Figure descriptions: 10. First comb tooth; 11. Second comb tooth; 12. Through-slit one; 13. Through-slit two; 14. Glue block; 15. Edge strip; 16. Square groove; 17. Sheet-shaped glue plate; 141. V-shaped cut surface; 151. Inclined surface. Detailed Implementation

[0016] 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.

[0017] Example like Figures 1 to 4As shown, a bridge expansion joint that facilitates the replacement of sealing strips includes a first comb tooth 10 and a second comb tooth 11. The first comb tooth 10 and the second comb tooth 11 are arranged alternately to form a through joint 12 and a through joint 13. A rubber block 14 is embedded in the inner wall of the through joint 12, and a side strip 15 is embedded in the inner wall of the through joint 13. A square groove 16 is embedded in the bottom of the rubber block 14, and a sheet rubber plate 17 is provided on the top of the rubber block 14.

[0018] The through joint 12 and the through joint 13 form a continuous S-shaped expansion joint.

[0019] The adhesive block 14 has side strips 15 on both sides of one end.

[0020] One end of the edge strip 15 is provided with an inclined surface 151.

[0021] The plurality of the aforementioned adhesive blocks 14, edge strips 15, and sheet adhesive plates 17 constitute an integral sealing strip.

[0022] Both the first comb tooth 10 and the second comb tooth 11 are provided with a sealing strip at their tops, and the two sealing strips do not contact each other when the first comb tooth 10 and the second comb tooth 11 are not under stress.

[0023] The bottom of the adhesive block 14 is provided with a V-shaped cut surface 141.

[0024] It should be noted that, in this embodiment, the bridge expansion joint with easy-to-replace sealing strip is applied to the expansion joint of the bridge to accommodate the expansion and contraction deformation of the bridge caused by factors such as temperature changes and vehicle loads, while also serving to seal and waterproof.

[0025] During installation, the first comb tooth 10 and the second comb tooth 11 are staggered at the reserved positions of the bridge expansion joint. The two intersect to form through joint one 12 and through joint two 13, and through joint one 12 and through joint two 13 form a continuous S-shaped expansion joint. This S-shaped design can better adapt to the expansion and contraction deformation of the bridge, making the expansion and contraction process smoother and reducing stress concentration.

[0026] A rubber block 14 is embedded in the inner wall of the through joint 12. The bottom of the rubber block 14 has a V-shaped cut 141. This V-shaped cut 141 design makes the rubber block 14 fit more tightly when embedded in the through joint 12, and can better conform to the inner wall of the through joint 12, thus enhancing the sealing effect. At the same time, a square groove 16 is also embedded in the bottom of the rubber block 14. The square groove 16 can increase the elasticity of the rubber block 14 to a certain extent, so that it can deform better without damage when the bridge expands and contracts. A sheet rubber plate 17 is provided on the top of the rubber block 14. The sheet rubber plate 17 can further enhance the sealing performance and prevent moisture and debris from entering the interior of the expansion joint.

[0027] An edge strip 15 is embedded in the inner wall of the second through joint 13, and edge strips 15 are provided on both sides of one end of the rubber block 14. One end of the edge strip 15 is provided with an inclined surface 151. The design of the inclined surface 151 facilitates the smooth embedding of the edge strip 15 into the second through joint 13 during installation, and also reduces the friction between the edge strip 15 and the inner wall of the second through joint 13 during bridge expansion and contraction, making the expansion and contraction process smoother.

[0028] Multiple rubber blocks 14, edge strips 15, and sheet rubber plates 17 constitute an integral sealing strip. Each of the first comb tooth 10 and the second comb tooth 11 has such a sealing strip on its top. When the first comb tooth 10 and the second comb tooth 11 are not under stress, the two sealing strips do not contact each other, leaving a certain gap to allow for the expansion and contraction of the bridge.

[0029] When the bridge elongates due to increased temperature, the first comb tooth 10 and the second comb tooth 11 will move relative to each other, causing changes in the width of through-slit 12 and through-slit 2 13. At this time, the rubber block 14 embedded in through-slit 12 will be compressed. Due to the design of its bottom V-shaped cut surface 141 and square groove 16, the rubber block 14 can undergo elastic deformation and be compressed towards the square groove 16. At the same time, the sheet rubber plate 17 will also undergo a certain degree of bending deformation, but still maintain a tight connection with the rubber block 14, ensuring that the sealing performance is not affected.

[0030] The edge strip 15 inside the second through joint 13 will also move relative to the bridge as it elongates. The inclined surface 151 reduces the friction between the edge strip 15 and the inner wall of the second through joint 13 during the movement, thus reducing wear. At the same time, the cooperation between the edge strip 15 and the rubber block 14 ensures the integrity and sealing of the entire sealing strip during the elongation of the bridge.

[0031] When the bridge contracts due to temperature drop, the first comb tooth 10 and the second comb tooth 11 move in opposite directions, and the rubber block 14 and the edge strip 15 return to their original shape under their own elasticity, continuing to be tightly embedded in the through joint 12 and through joint 2 13, maintaining the sealing effect. Throughout the entire expansion and contraction process, the sealing strip can always adapt to the deformation of the bridge, and there will be no situation of falling off or sealing failure.

[0032] Over time, the sealing strips may age and wear, requiring replacement. However, the sealing strips in this bridge's expansion joints are designed for easy replacement, making the process relatively simple.

[0033] First, use a professional tool to pry up the sealing strip that needs to be replaced from the top of the first comb tooth 10 or the second comb tooth 11. Since the rubber block 14, the edge strip 15 and the through seam one 12 and through seam two 13 are connected by elastic embedding rather than rigid fixation, the prying process is relatively easy and will not damage the first comb tooth 10 and the second comb tooth 11.

[0034] After completely removing the old sealing strip, clean the debris and residual adhesive from the inner walls of through-slit 12 and through-slit 23 to ensure the inner walls are clean and flat. Then, according to the installation requirements, align the inclined surface 151 of the edge strip 15 with through-slit 23 and slowly insert it into through-slit 23. At the same time, align the V-shaped cut surface of the adhesive block 14 with the inner wall of through-slit 12 and press the adhesive block 14 firmly to make it tightly embedded in through-slit 12. The sheet adhesive plate 17 is naturally placed on top of the adhesive block 14.

[0035] After installation, check the fit between the sealing strip and the first comb tooth 10 and the second comb tooth 11 to ensure there are no gaps or lifting. A small-scale bridge expansion joint simulation test can be conducted to observe the state of the sealing strip during the expansion and contraction process. If there are no abnormalities, the replacement is complete, and the bridge expansion joint can be restored to normal use.

[0036] Under various environmental conditions, this bridge expansion joint, with its easily replaceable sealing strips, exhibits excellent performance. In high-temperature environments, the material used in the sealing strips possesses good heat resistance and will not soften or deform due to temperature increases, maintaining stable sealing performance. The V-shaped cut and square groove design of the sealing block 14 allow it to maintain a certain degree of elasticity even at high temperatures, adapting to the expansion and contraction deformation of the bridge.

[0037] In low-temperature environments, the sealing strip material has good cold resistance and will not become brittle or crack. The inclined surface 151 of the edge strip 15 reduces stress concentration caused by material shrinkage at low temperatures, ensuring a tight connection between the edge strip 15 and the inner wall of the through joint 13.

[0038] In humid or rainy areas, the sealing strips effectively prevent moisture from entering the expansion joints, thus avoiding corrosion of the bridge structure. Furthermore, their ease of replacement allows for timely replacement when the sealing strips become damaged due to prolonged moisture exposure, ensuring the long-term safe use of the bridge.

[0039] In arid regions, sealing strips can prevent debris from entering expansion joints, reducing the likelihood of debris accumulation affecting bridge expansion and contraction. Furthermore, their simple structural design and convenient replacement methods reduce maintenance costs and workload.

[0040] 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 bridge expansion joint with easily replaceable sealing strips, comprising a first comb tooth (10) and a second comb tooth (11), characterized in that, The first comb tooth (10) and the second comb tooth (11) are arranged alternately to form a through-slit one (12) and a through-slit two (13). The inner wall of the through-slit one (12) is embedded with a rubber block (14), the inner wall of the through-slit two (13) is embedded with a strip (15), the bottom of the rubber block (14) is embedded with a square groove (16), and the top of the rubber block (14) is provided with a sheet rubber plate (17).

2. A bridge expansion joint with easily replaceable sealing strips according to claim 1, characterized in that, The through joint one (12) and the through joint two (13) form a continuous S-shaped expansion joint.

3. A bridge expansion joint with easily replaceable sealing strips according to claim 1, characterized in that, The adhesive block (14) has side strips (15) on both sides of one end.

4. A bridge expansion joint with easily replaceable sealing strips according to claim 3, characterized in that, One end of the edge strip (15) is provided with an inclined surface (151).

5. A bridge expansion joint with easily replaceable sealing strips according to claim 1, characterized in that, Multiple adhesive blocks (14), edge strips (15), and sheet adhesive plates (17) constitute an integral sealing strip.

6. A bridge expansion joint with easily replaceable sealing strips according to claim 5, characterized in that, Both the first comb tooth (10) and the second comb tooth (11) are provided with a sealing strip at their tops, and the two sealing strips do not contact each other when the first comb tooth (10) and the second comb tooth (11) are not under stress.

7. A bridge expansion joint with easily replaceable sealing strips according to claim 1, characterized in that, The bottom of the adhesive block (14) is provided with a V-shaped cut surface (141).

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