Buffering and noise reduction type bridge expansion joint filling device

Abstract

The utility model relates to bridge expansion joint technical field discloses a kind of buffer noise reduction type bridge expansion joint filling device, including pre-buried anchorage, comb tooth type composite component and expansion joint gap between adjacent bridge deck slab, the pre-buried anchorage is used to connect bridge deck slab and filling layer, the pre-buried anchorage is fixedly connected with comb tooth type composite component, it is characterized in that, the comb tooth type composite component is equipped with elastomer filling cavity, the elastomer filling cavity is equipped with the elastomeric support piece of upwardly inclined arrangement. With the advantages that overall durability is longer, noise is smaller, driving comfort is good.

Description

Technical Field

[0001] This utility model relates to the field of bridge expansion joint technology, specifically to a buffer and noise reduction type bridge expansion joint filling device. Background Technology

[0002] With the increasing emphasis placed on the national strategy of building a strong transportation network, remarkable achievements have been made in the construction of transportation infrastructure such as bridges. To date, my country has over 1.1 million bridges, with many newly built bridges employing long spans or continuous beams. Consequently, the number of bridge expansion joints is constantly increasing. Bridge expansion joints are a crucial component of bridge structural safety. Their function is to meet the multi-dimensional coupled displacement requirements of the bridge, allowing vehicles to pass smoothly and safely through the expansion joint area. When vehicles travel at high speed across bridge expansion joints, the impact of vehicle tires on discontinuous stepped surfaces such as steel profiles and toothed plates inevitably generates significant noise, which propagates downwards through the expansion joints, causing considerable noise pollution to surrounding residents.

[0003] Chinese patent document CN113756185A discloses an ultra-shallow buried comb-tooth plate bridge expansion joint device, including a bridge abutment beam end, an expansion joint groove, a fixed comb-tooth plate, and a movable comb-tooth plate. An expansion joint groove is pre-installed between two adjacent bridge abutment beam ends. The device is characterized in that: the upper surfaces of the fixed and movable comb-tooth plates are flush, and the fixed and movable comb-tooth plates interlock at the joint through a comb-tooth structure; the upper surface of the fixed and / or movable comb-tooth plates has multiple overflow holes penetrating the comb-tooth plates; the bottom surface of the fixed comb-tooth plate is provided with a waterproofing device. The dustproof metal plate has overflow holes on its upper surface and in the movable expansion area between the fixed comb plate and the movable comb plate, or the dustproof metal plate does not have overflow holes. There are pre-cast concrete areas and post-cast concrete areas between the left abutment beam end and the fixed comb plate, and between the right abutment beam end and the movable comb plate. The pre-cast concrete areas and post-cast concrete areas on the same side of the expansion joint groove are connected to the overflow holes on the same side of the expansion joint groove. Concrete is poured in the pre-cast concrete areas and post-cast concrete areas.

[0004] Chinese patent document CN111851284A discloses a multifunctional vibration-damping and noise-reducing bridge expansion joint, including a first beam and a second beam, with a gap between the first beam and the second beam. The top of the first beam is provided with a first reserved groove, and the top of the second beam is provided with a second reserved groove. A rotating comb-tooth steel plate is provided in the first reserved groove, and a fixed comb-tooth steel plate matching the rotating comb-tooth steel plate is provided in the second reserved groove.

[0005] Existing technologies use rigid comb-tooth plate structures on the surface, which still generate noise under the bridge after being impacted by vehicle loads. The vibration reduction and noise reduction effects are not obvious. The expansion joints have high surface stiffness, resulting in poor driving comfort and overall durability. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a buffer and noise reduction bridge expansion joint filling device, including a pre-embedded anchor, a comb-type composite component, and an expansion joint gap between adjacent bridge decks. The pre-embedded anchor is used to connect the bridge deck and the filling layer. The pre-embedded anchor is fixedly connected to the comb-type composite component. The comb-type composite component is provided with an elastomer filling cavity, and an upwardly inclined elastic support is provided in the elastomer filling cavity.

[0007] Preferably, the elastic support includes a connecting sleeve, an elastic element, and a force transmission rod. The end of the connecting sleeve is disposed on the comb-type composite assembly, the end of the elastic element is disposed inside the connecting sleeve, and the other end of the elastic element is connected to the force transmission rod for controlling the extension and retraction of the force transmission rod.

[0008] To enhance the stability between the force transmission support rod and the filling material in the elastomer filling cavity, a baffle is provided on the force transmission support rod, and the baffle is located at the opening of the connecting sleeve.

[0009] To facilitate adjustment of the tilt angle during pouring, the end of the connecting sleeve is hinged to the comb-type composite component.

[0010] To accommodate large deformations, the comb-type composite component includes a comb plate and two mounting plates. The comb plate is located above the expansion joint gap and between the two mounting plates, and the comb plate and the two mounting plates are in a comb-tooth clearance fit.

[0011] Preferably, the mounting plate is arranged in an inverted T shape, and the comb plate and the two mounting plates together form the elastomer filling cavity.

[0012] To effectively avoid stress concentration, the ends of the transverse steel plates of the mounting plate are all rounded.

[0013] In order to enable the expansion joint device to recover its deformation more quickly under vehicle load and to prevent the expansion joint surface from arching, the elastic body filling cavity is provided with elastic corrugated steel.

[0014] To improve driving comfort, the filling layer includes an upper transition layer and a lower filling layer. The upper transition layer is an asphalt elastic layer located between the asphalt pavement layer and the comb-type composite component. The lower filling layer is a steel fiber reinforced concrete layer located between the asphalt pavement layer, the upper transition layer, the comb-type composite component, and the bridge deck.

[0015] This utility model has the following beneficial effects: 1. Under vehicle load, the expansion joint of this utility model has a downward deformation in the middle of the elastic body in the elastic body filling cavity. Part of the deformation force acts on the elastic support, causing the force transmission rod to slide in the connecting sleeve and squeeze the spring. The elasticity of the spring acts in the opposite direction on the force transmission rod, which helps the expansion joint to restore its deformation. It absorbs noise and improves the comfort during driving. At the same time, compared with the surface rigid comb plate structure, this structure has better overall durability, longer service life, and reduces the direct force on rigid materials.

[0016] 2. This utility model provides a transition layer between the comb-type composite component and the pavement layer, offering a smooth transition section and improving driving comfort.

[0017] 3. This utility model adopts a layered paving and smooth transition structure, which improves the overall driving comfort. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the buffer and noise reduction bridge expansion joint filling device of this utility model; Figure 2 This is a top view of the comb-type composite component; Figure 3 This is a schematic diagram of an elastic support component. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Embedded anchor; 101. Embedded steel bar; 102. Anchoring steel bar; 2. Comb-type composite component; 201. Comb plate; 202. Mounting plate; 3. Bridge deck; 4. Expansion joint gap; 5. Filling layer; 5. Upper transition layer; 501. Lower filling layer; 502. Pavement layer; 6. Elastomer filling cavity; 7. Elastic support; 8. Connecting sleeve; 801. Spring; 802. Force transmission strut; 803. Baffle; 804. Elastic corrugated steel; 9. Fixing bolt; 10.

[0020] Example 1 like Figure 1-3 As shown, a buffer and noise reduction bridge expansion joint filling device includes two pre-embedded anchors 1, a comb-type composite component 2, a bridge deck 3, an expansion joint gap 4 between adjacent bridge decks 3, a filling layer 5, and a pavement layer 6. The two pre-embedded anchors 1 are respectively on the two bridge decks 3 and connect the bridge deck 3 and the filling layer 5. The asphalt pavement layer 6 is located above the bridge deck 3. The pre-embedded anchors 1 are fixedly connected to the comb-type composite component 2. The comb-type composite component 2 is provided with an elastomer filling cavity 7. Multiple upwardly inclined elastic supports 8 are provided on the left and right sides of the elastomer filling cavity 7. The elastic supports 8 are symmetrically arranged along the expansion joint gap 4. The elastomer filling cavity 7 is filled with ultra-high toughness resin elastomer.

[0021] The elastic support 8 includes a connecting sleeve 801, a spring 802, and a force transmission rod 803. The end of the connecting sleeve 801 is hinged to the comb-type composite component 2. The end of the spring 802 is disposed inside the connecting sleeve 801. The other end of the spring 802 is connected to the force transmission rod 803 and controls the extension and retraction of the force transmission rod 803.

[0022] The force transmission support rod 803 is provided with a baffle 804, which is located at the opening of the connecting sleeve 801. The baffle 804 moves with the force transmission support rod 803.

[0023] The comb-type composite component 2 includes a comb plate 201 and two mounting plates 202. The comb plate 201 is located above the expansion joint gap 4 and between the two mounting plates 202. The comb plate 201 and the two mounting plates 202 are in a comb-tooth clearance fit.

[0024] The mounting plate 202 is arranged in an inverted T shape. The top of the mounting plate 202 is flush with the pavement layer 6. The comb plate 201 and the two mounting plates 202 together form the elastomer filling cavity 7. The ends of the transverse steel plates of the mounting plate 202 are all arc-shaped, which effectively avoids stress concentration.

[0025] The elastic support members 8 are respectively installed on the side walls of the vertical steel plates of the two mounting plates 202.

[0026] The elastic corrugated steel 9 is provided in the elastomer filling cavity 7. The elastic corrugated steel 9 has a wave-like structure and is located in the lower part of the elastomer filling cavity 7. The elastic corrugated steel 9 is connected to the comb-type composite component 2 by fixing bolts 10. The elastic corrugated steel 9 and the ultra-high toughness resin elastomer deform together to increase the compression modulus of the combined structure, so that the expansion joint device can recover deformation faster under vehicle load and avoid arching of the expansion joint surface. The fixing bolts 10 also pass through the comb-type composite component 2 to connect to the pre-embedded anchor 1. The pre-embedded anchor 1 includes pre-embedded steel bars 101 and anchoring steel bars 102. The two ends of the pre-embedded steel bars 101 are pre-embedded in the bridge deck 3. The bridge deck 3 is a concrete bridge deck. The anchoring steel bars 102 are arranged laterally at the bend of the pre-embedded steel bars 101.

[0027] The filling layer 5 includes an upper transition layer 501 and a lower filling layer 502. The upper transition layer 501 is an asphalt elastic layer located between the asphalt pavement layer 6 and the comb-type composite component 2. The lower filling layer 502 is a steel fiber reinforced concrete layer located between the asphalt pavement layer 6, the upper transition layer 501, the comb-type composite component 2, and the bridge deck 3. The modulus of the asphalt elastic layer above the steel fiber reinforced concrete layer is close to that of the asphalt pavement, providing a smooth transition section and improving driving comfort.

[0028] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A buffer-type noise-reducing bridge expansion joint filling device, comprising pre-embedded anchors, a comb-type composite component, and an expansion joint gap between adjacent bridge decks, wherein the pre-embedded anchors are used to connect the bridge decks and the filling layer, and the pre-embedded anchors are fixedly connected to the comb-type composite component, characterized in that... The comb-type composite component is provided with an elastomer filling cavity, and an upwardly inclined elastic support member is provided inside the elastomer filling cavity.

2. The buffer and noise reduction bridge expansion joint filling device according to claim 1, characterized in that: The elastic support includes a connecting sleeve, an elastic element, and a force transmission rod. The end of the connecting sleeve is disposed on the comb-type composite assembly, the end of the elastic element is disposed inside the connecting sleeve, and the other end of the elastic element is connected to the force transmission rod.

3. The buffer and noise reduction bridge expansion joint filling device according to claim 2, characterized in that: The force transmission support rod is equipped with a baffle, which is located at the opening of the connecting sleeve.

4. The buffer and noise reduction bridge expansion joint filling device according to claim 3, characterized in that: The end of the connecting sleeve is hinged to the comb-type composite component.

5. The buffer and noise reduction bridge expansion joint filling device according to claim 4, characterized in that: The comb-type composite component includes a comb plate and two mounting plates. The comb plate is located above the expansion joint gap and between the two mounting plates. The comb plate and the two mounting plates are in a comb-tooth clearance fit.

6. The buffer and noise reduction bridge expansion joint filling device according to claim 5, characterized in that: The mounting plate is arranged in an inverted T shape, and the comb plate and the two mounting plates together form the elastomer filling cavity.

7. The buffer and noise reduction bridge expansion joint filling device according to claim 6, characterized in that: The ends of the horizontal steel plates of the mounting plate are all arc-shaped.

8. The buffer and noise reduction bridge expansion joint filling device according to claim 7, characterized in that: The elastomer filling cavity is provided with elastic corrugated steel.

9. The buffer and noise reduction bridge expansion joint filling device according to claim 8, characterized in that: An asphalt pavement layer is provided above the bridge deck. The filling layer includes an upper transition layer and a lower filling layer. The upper transition layer is an asphalt elastic layer located between the asphalt pavement layer and the comb-type composite component. The lower filling layer is a steel fiber reinforced concrete layer located between the asphalt pavement layer, the upper transition layer, the comb-type composite component, and the bridge deck.

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