A polyurethane elastomer seamless expansion joint device

Abstract

The utility model discloses a kind of polyurethane elastomer seamless expansion joint devices, belong to bridge technical field, including concrete bridge deck, deformation joint is formed between two adjacent concrete bridge deck with interval, the end surface of concrete bridge deck forms notch, polyurethane elastomer block is installed at notch, two polyurethane elastomer blocks of longitudinal adjacent are a group, polyurethane elastomer block is uniformly provided with multiple groups along the transverse of bridge, and joint is formed by contact between two transverse adjacent groups of polyurethane elastomer block, the width of polyurethane elastomer block is 5~30cm;Polyurethane elastomer block lower side and notch bottom are spaced apart to form drainage channel, and drainage channel is communicated with deformation joint. The utility model device can have the ability of seamless expansion simultaneously, ensure the drainage capacity of bridge.

Description

Technical Field

[0001] This utility model belongs to the field of bridge technology, specifically relating to a seamless expansion joint device made of polyurethane elastomer. Background Technology

[0002] When temperatures change, bridge decks deform due to expansion or contraction. Vehicle loads cause rotation and longitudinal displacement at the beam ends. Therefore, expansion joints are necessary to ensure smooth vehicle passage and meet the requirements of bridge deck deformation. Conventional seamless expansion joints fill the expansion gaps at the bridge ends with elastic material, forming a continuous pavement that prevents impact and vibration during vehicle traffic. However, existing elastic materials are often limited. For example, patent CN119177606A discloses a seamless polyurethane elastomer expansion device and its construction process. This patent uses a single piece of polyurethane elastomer at the expansion joint. This design results in poor drainage of impurities, which easily accumulate on the surface of the polyurethane elastomer. Under continuous vehicle traffic, these impurities can easily damage the bridge deck or the polyurethane elastomer, severely impacting the bridge's lifespan. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a seamless expansion joint device of polyurethane elastomer, which can ensure the drainage capacity of the bridge while having the ability to expand and contract seamlessly.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] This utility model discloses a seamless expansion joint device using polyurethane elastomer, comprising a concrete bridge deck, with an expansion joint formed between two adjacent concrete bridge decks, a notch formed on the end face of the concrete bridge deck, and polyurethane elastic blocks installed at the notch. Two longitudinally adjacent polyurethane elastic blocks form a group, and multiple groups of polyurethane elastic blocks are evenly arranged along the transverse direction of the bridge. Two transversely adjacent groups of polyurethane elastic blocks contact each other to form a joint, and the width of the polyurethane elastic blocks is 5-30cm. A drainage channel is formed between the lower side of the polyurethane elastic block and the bottom of the notch, and the drainage channel is connected to the expansion joint.

[0006] Furthermore, a support rod is connected between two adjacent concrete bridge decks, and a support hole is opened in the polyurethane elastic block for installing the support rod, which is used to support the polyurethane elastic block.

[0007] Furthermore, the support rod includes a rod body, a connecting sleeve, and a guide tube. The guide tube is installed in the support holes of two adjacent concrete bridge decks. One end of the rod body is slidably installed in the guide tube, and the other end extends toward the side where the expansion joint is located. The two rod bodies corresponding to the two concrete bridge decks are connected by a sleeve thread, and the threads of the two rod bodies are turned in opposite directions.

[0008] Furthermore, the outer surface of the rod is integrally formed with a raised ridge along its axial direction, and the guide tube is provided with a groove corresponding to the raised ridge.

[0009] Furthermore, anchors are pre-embedded in the concrete bridge deck, and the anchors extend out of the concrete bridge deck and connect with polyurethane elastic blocks.

[0010] Furthermore, the bottom of the gap forms a slope that slopes downward toward the expansion joint.

[0011] Furthermore, elastic support plates are installed on the sidewalls of the gap, with each elastic support plate corresponding to a polyurethane elastic block. The elastic support plates extend toward the side where the expansion joint is located, and the outer ends of the elastic support plates are supported by arc-shaped support members. A slot for installing the arc-shaped support members is provided at the gap. The arc-shaped support members are made of multiple arc-shaped spring steel plates stacked together, with the outer concave surface of the arc-shaped support members facing the side where the elastic support plates are located. The lower ends of the multiple arc-shaped spring steel plates are aligned, and the length of the arc-shaped spring steel plates gradually decreases from the inside to the outside.

[0012] The beneficial effects of this utility model are as follows:

[0013] This utility model discloses a seamless expansion joint device using polyurethane elastomer. By installing multiple polyurethane elastic blocks at the notches in the panel, the polyurethane elastic blocks are made of elastic polyurethane elastomer material. When a vehicle runs over the polyurethane elastic blocks, the width of the joint also contracts and changes in time under the contraction of the polyurethane elastic blocks. Debris and impurities on the panel or polyurethane elastic blocks can be discharged in time from the constantly contracting and changing joint, thereby ensuring the drainage capacity of the bridge and improving the bridge's service life.

[0014] Other advantages, objectives and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention.

[0015] The objectives and other advantages of this invention can be obtained from the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a structural schematic diagram of the seamless expansion joint device of this utility model;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 This is a schematic diagram showing the arrangement of polyurethane elastic blocks;

[0020] Figure 4 This is a structural schematic diagram of the support rod;

[0021] Figure 5 This is a structural schematic diagram of the arc-shaped support component.

[0022] The following are labeled in the attached diagram: 1. Concrete bridge deck; 2. Expansion joint; 3. Notch; 4. Polyurethane elastic block; 5. Joint; 6. Drainage channel; 7. Support rod; 8. Support hole; 9. Rod body; 10. Connecting sleeve; 11. Guide tube; 12. Protruding ridge; 13. Slide groove; 14. Anchor nail; 15. Inclined surface; 16. Elastic support plate; 17. Arc-shaped support component; 18. Slot; 19. Arc-shaped spring steel plate. Detailed Implementation

[0023] like Figures 1-5 As shown, a seamless expansion joint device of polyurethane elastomer is disclosed, including a concrete bridge deck 1, which is joined at the ends. An expansion joint 2 is formed between two adjacent concrete bridge decks 1. The expansion joint 2 allows a certain amount of expansion space between the two concrete bridge decks 1 in the longitudinal direction, allowing the bridge span to expand and contract freely with temperature changes.

[0024] Specifically, a notch 3 is formed on the end face of the concrete bridge deck 1, forming the bottom and sidewall surfaces. A polyurethane elastic block 4 is installed at the notch 3. The polyurethane elastic block 4 is made of polyurethane elastomer material. Two longitudinally adjacent polyurethane elastic blocks 4 form a group, and multiple groups of polyurethane elastic blocks 4 are evenly distributed along the transverse direction of the bridge. A joint 5 is formed between two transversely adjacent groups of polyurethane elastic blocks 4. The width of the polyurethane elastic block 4 is at least one-tenth of the deck width; specifically, the width of the polyurethane elastic block 4 is 5–30 cm. A drainage channel 6 is formed between the lower side of the polyurethane elastic block 4 and the bottom of the notch 3, and the drainage channel 6 is connected to the expansion joint 2, which can be used to assist in drainage. Thus, debris and impurities on the deck or polyurethane elastic blocks 4 can be discharged promptly from the constantly shrinking joint 5, thereby ensuring the bridge's drainage capacity and improving its lifespan.

[0025] In this embodiment, a support rod 7 is connected between two adjacent concrete bridge decks 1. A support hole 8 for installing the support rod 7 is provided inside the polyurethane elastic block 4. The support rod 7 supports the polyurethane elastic block 4, preventing it from blocking the drainage channel 6. It is understood that the width of the notch 3 is smaller than the width of the tire. The support rod 7 and the deck are used simultaneously to support the vehicle or cargo, reducing the applied weight on the support rod 7.

[0026] In this embodiment, the support rod 7 includes a rod body 9, a connecting sleeve 10, and a guide tube 11. The guide tube 11 is installed in the support holes 8 of two adjacent concrete bridge decks 1. One end of the rod body 9 is slidably installed inside the guide tube 11, and the other end extends towards the side where the expansion joint 2 is located. The two corresponding rod bodies 9 of the two concrete bridge decks 1 are connected by a sleeve thread, with the threads of the two rod bodies 9 rotating in opposite directions. This installation method facilitates the replacement and maintenance of the support rod 7. A raised ridge 12 is integrally formed on the outer surface of the rod body 9 along its axial direction. A groove 13 corresponding to the raised ridge 12 is provided on the guide tube 11 to accommodate the sliding connection of the rod body 9.

[0027] In this embodiment, anchors 14 are also pre-embedded in the concrete bridge deck 1. After the anchors 14 extend out of the concrete bridge deck 1, they are connected to the polyurethane elastic block 4, which facilitates the connection between the deck and the polyurethane elastic block 4.

[0028] In this embodiment, the bottom of the notch 3 forms a slope 15 that slopes downward toward the deformation joint 2, which makes it easier to drain.

[0029] In this embodiment, an elastic support plate 16 is installed on the side wall of the notch 3. The elastic support plate 16 corresponds one-to-one with the polyurethane elastic block 4. The elastic support plate 16 extends towards the side where the deformation joint 2 is located. The outer end of the elastic support plate 16 is supported by an arc-shaped support member 17. A slot 18 for installing the arc-shaped support member 17 is provided at the notch 3. The arc-shaped support member 17 is composed of multiple arc-shaped spring steel plates 19 stacked together. The outer concave surface of the arc-shaped support member 17 faces the side where the elastic support plate 16 is located. The lower ends of the multiple arc-shaped spring steel plates 19 are aligned, and the length of the arc-shaped spring steel plates 19 gradually decreases from the inside to the outside. By using the combination of the elastic support plate 16 and the arc-shaped support member 17 to provide elastic support for the polyurethane elastic block 4, a larger elastic support force can be provided for the polyurethane elastic block 4, preventing permanent deformation of the polyurethane elastic block 4 and giving it a longer service life. Using the above support method can save costs and facilitate replacement and maintenance.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A seamless expansion joint device made of polyurethane elastomer, comprising a concrete bridge deck, wherein an expansion joint is formed between adjacent concrete bridge decks, characterized in that: A notch is formed on the end face of the concrete bridge deck, and polyurethane elastic blocks are installed at the notch. Two longitudinally adjacent polyurethane elastic blocks form a group. Multiple groups of polyurethane elastic blocks are evenly arranged along the transverse direction of the bridge. A joint is formed between two transversely adjacent groups of polyurethane elastic blocks. The width of the polyurethane elastic blocks is 5-30cm. A drainage channel is formed between the lower side of the polyurethane elastic block and the bottom of the notch. The drainage channel is connected to the expansion joint.

2. The seamless expansion joint device of polyurethane elastomer according to claim 1, characterized in that: Support rods are connected between two adjacent concrete bridge decks. Support holes for installing support rods are opened in the polyurethane elastic blocks. The support rods are used to support the polyurethane elastic blocks.

3. The seamless expansion joint device of polyurethane elastomer according to claim 2, characterized in that: The support rod includes a rod body, a connecting sleeve, and a guide tube. The guide tube is installed in the support holes of two adjacent concrete bridge decks. One end of the rod body is slidably installed in the guide tube, and the other end extends toward the side where the expansion joint is located. The two rod bodies corresponding to the two concrete bridge decks are connected by a sleeve thread, and the threads of the two rod bodies are turned in opposite directions.

4. The seamless expansion joint device of polyurethane elastomer according to claim 3, characterized in that: The outer surface of the rod is integrally formed with a raised ridge along its axial direction, and the guide tube is provided with a groove corresponding to the raised ridge.

5. A seamless polyurethane elastomer expansion joint device according to claim 1, characterized in that: Anchors are also embedded in the concrete bridge deck, and the anchors extend out of the concrete bridge deck and connect with polyurethane elastic blocks.

6. The seamless expansion joint device of polyurethane elastomer according to claim 1, characterized in that: The bottom of the gap forms a slope that slopes downward toward the expansion joint.

7. The seamless expansion joint device of polyurethane elastomer according to claim 1, characterized in that: Elastic support plates are installed on the side wall of the gap. Each elastic support plate corresponds to a polyurethane elastic block. The elastic support plate extends toward the side where the expansion joint is located. The outer end of the elastic support plate is supported by an arc-shaped support. A slot for installing the arc-shaped support is provided at the gap. The arc-shaped support is made up of multiple arc-shaped spring steel plates stacked together. The outer concave surface of the arc-shaped support faces the side where the elastic support plate is located. The lower ends of the multiple arc-shaped spring steel plates are aligned. The length of the arc-shaped spring steel plates gradually decreases from the inside to the outside.

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