Assembly type bridge expansion joint with vibration and noise reduction function

Abstract

The utility model relates to the technical field of bridge engineering expansion joint, concretely is a kind of assembled vibration reduction and noise reduction type bridge expansion device, including bridge main body structure, the inside of bridge main body structure is provided with expansion joint anchorage zone, the inside of expansion joint anchorage zone is provided with two groups of corbel steel member, the surface of corbel steel member is provided with polyurethane panel, the bottom of corbel steel member is provided with stainless steel waterstop.The utility model is provided with corbel steel member, as the main force structure of crossing seam, so that wheel does not simultaneously act on expansion zone, reduces the impact stress concentrated in relative beam body and the driving noise generated thereby in the process of vehicle crossing seam driving;Three anti-loose connections are used for polyurethane panel to prevent bolt loosening under high-frequency vibration, polyurethane panel sound reduction and noise reduction, weather resistance, corrosion resistance, good fatigue resistance, both rigidity and flexibility, give full play to respective performance, improve the overall safety durability, so that the device has remarkable advantages.

Description

Technical Field

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

[0002] Bridge expansion joints are an important component of bridge structures. Their main function is to accommodate the deformation of the bridge caused by temperature changes, vehicle loads, foundation settlement, structural deflection, and rotation, while ensuring smooth vehicle passage.

[0003] Traditional expansion joint devices (such as modular and comb-plate types) directly bear the impact of vehicle dynamic loads and are exposed to harsh environments such as humidity, heat, acid, and alkali corrosion for extended periods, making them weak points in bridge structures with a service life far shorter than design requirements. Specifically, this manifests in several ways: inadequate construction process control can lead to insufficient anchorage between the expansion joint and the concrete, resulting in bolt breakage, loosening and detachment of the comb plates; long-term cyclic impact from vehicles can cause fatigue damage to components, with high-strength bolts deforming or breaking due to stress concentration; untimely maintenance can lead to clogged gaps and loss of expansion function; and defects in the finished product further exacerbate the risk of damage.

[0004] A search revealed that patent application number (202421877026.X) discloses "an S-shaped multi-directional displacement vibration reduction and noise reduction expansion joint device". Its rubber sealing plate and buffer rubber block are prone to aging and cracking under long-term load and environmental action, resulting in a decrease in vibration reduction performance. At the same time, the connection between the embedded part and the buffer rubber block is prone to local deformation due to stress concentration during multi-directional displacement, which affects the bolt tightness.

[0005] Existing expansion joint devices cause significant impact on the bridge structure and generate noise when vehicles cross the joints, affecting driving comfort and structural stability. Expansion joints are also prone to damage due to stress concentration and fatigue failure, resulting in poor durability. Furthermore, they are inadequate in terms of waterproofing, dustproofing, and sound insulation, and some expansion joint devices are not aesthetically pleasing. Therefore, we propose a prefabricated vibration-damping and noise-reducing bridge expansion joint device to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a prefabricated vibration-damping and noise-reducing bridge expansion joint device to solve the problems mentioned in the background art, such as the large impact on the beam during vehicle crossing, resulting in noise, affecting driving comfort and structural stability; the expansion joint is prone to damage due to stress concentration and fatigue failure, resulting in poor durability; and the existing expansion joint devices are inadequate in terms of waterproofing, dustproofing, and sound insulation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated vibration-damping and noise-reducing bridge expansion joint device, comprising a bridge main structure, wherein an expansion joint anchorage area is provided inside the bridge main structure, and two sets of corbel steel components are provided inside the expansion joint anchorage area, wherein a polyurethane panel is provided on the surface of the corbel steel components, and a stainless steel waterstop is provided at the bottom of the corbel steel components. The corbel steel component includes a web, a top plate, a corbel support plate, and an anchoring steel plate. The web is located inside the expansion joint anchoring zone, the top plate is located at the bottom of the polyurethane panel, and the corbel support plate and anchoring steel plate are located on both sides of the web. The polyurethane panel consists of two sets of cross-joint rutted areas and an expansion joint between them. The two sets of expansion joints are W-shaped. The surface of the cross-joint rutted areas is provided with fixing holes at equal intervals, and bolt anchors are provided inside the fixing holes.

[0008] Preferably, the stainless steel waterstop includes fixing bolts and a waterstop plate. The bottom of both sets of web plates are provided with second positioning holes at equal intervals. The waterstop plate is set on the inner wall of the two sets of web plates. The fixing bolts are inserted into the second positioning holes to install the waterstop plate. The waterstop plate is V-shaped.

[0009] Preferably, the top plate adopts a wave-like arc shape, the corbel support plate is connected to the cantilever crest of the top plate, and an anchoring steel plate is fixedly connected to the other side of the web plate, the position of the anchoring steel plate corresponding to the corbel support plate.

[0010] Preferably, the two sets of cross-joint rutted areas adopt a wavy arc shape, the expansion joint is connected between the wavy arc shapes of the two sets of cross-joint rutted areas, the surface of the top plate is provided with a first positioning hole that matches the fixing hole, and the cross-joint rutted area is fixed to the top plate by bolt anchor.

[0011] Preferably, a protective zone is provided at the top of the wavy arc of the cross-joint rut area, and the protective zone adopts a novel cantilever elastic composite structure of spring steel plate and polyurethane elastomer.

[0012] Preferably, the surface of the cross-seam rut area is uniformly provided with grooves, and the grooves are wavy in shape.

[0013] Preferably, the expansion joint anchorage zone includes a ring-shaped reinforcing bar and a first horizontal reinforcing bar. The ring-shaped reinforcing bar is equidistantly arranged inside the main structure of the bridge. The anchorage steel plate has holes inside, and the first horizontal reinforcing bar passes through the holes in the anchorage steel plate.

[0014] Preferably, an expansion joint transition section is provided on the upper side of the expansion joint anchorage zone, the expansion joint transition section includes U-shaped anchor bars and second horizontal reinforcing bars, and U-shaped anchor bars and second horizontal reinforcing bars are provided inside the expansion joint anchorage zone.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model utilizes corbel steel components as the main load-bearing structure across the joint. Each steel structure is welded to form a whole, meeting the cantilever load requirements of the top plate overhanging the web plate. This reduces the cantilever stress and deformation of the top plate, avoids stress concentration and fatigue failure, reduces vibration caused by vehicle impact, and minimizes damage to the anchoring concrete from the steel structure. By extending the top plate into the expansion joint area with a wavy, gradually changing arc, the wheels do not simultaneously act on the expansion joint area, reducing the impact stress concentrated relative to the beam and the resulting driving noise during vehicle crossing the joint. Anchoring steel plates at corresponding positions ensure reliable anchoring of the corbel in the expansion joint area.

[0016] This invention utilizes a polyurethane panel with double-layered anti-loosening rings and an axial retaining spring on the nut. Epoxy sealant is injected into the top of the nut and installed on the corbel steel component to prevent bolts from loosening under high-frequency vibration. The rutted joint area features a gradual arc design, increasing the load-bearing surface when vehicles pass over it, reducing the impact between the wheel and the arc transition section, meeting the load-bearing requirements of the expansion joint, mitigating wheel impact vibration effects, and also providing sound insulation, dustproofing, and waterproofing. The shape of the rutted joint area is consistent with the steel structure top plate, adopting a wave-like shape for an aesthetically pleasing and rhythmic appearance. The expansion joint area employs a high-toughness, low-modulus elastic W-shaped folding structure. The variation in the W-angle satisfies the requirements for expansion and contraction deformation, while preventing dust and debris blockage. The transverse bridge segment bonding and assembly also forms the first waterproof barrier. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view schematic diagram of the overall structure of this utility model; Figure 2 This is a structural breakdown diagram of the present invention; Figure 3 This is a structural schematic diagram of the corbel steel component of this utility model; Figure 4 This is a schematic diagram of the structure of the polyurethane panel of this utility model; Figure 5 This utility model Figure 1 A cross-sectional view of section 2.

[0018] In the diagram: 1. Main bridge structure; 2. Expansion joint anchorage zone; 201. Ring reinforcement; 202. First horizontal reinforcement; 3. Corbel steel component; 301. Web plate; 302. Top plate; 303. Corbel; 304. Anchoring steel plate; 305. First positioning hole; 306. Second positioning hole; 4. Polyurethane panel; 401. Cross-joint rut zone; 402. Expansion zone; 403. Protective zone; 404. Groove; 405. Fixing hole; 406. Bolt anchor; 5. Stainless steel waterstop; 501. Fixing bolt; 502. Waterstop plate; 6. Expansion joint transition section; 601. U-shaped anchor bar; 602. Second horizontal reinforcement. Detailed Implementation The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5 This utility model provides an embodiment of a prefabricated vibration-damping and noise-reducing bridge expansion joint device, comprising a bridge main structure 1, an expansion joint anchorage zone 2 inside the bridge main structure 1, two sets of corbel steel components 3 inside the expansion joint anchorage zone 2, a polyurethane panel 4 on the surface of the corbel steel components 3, the polyurethane panel 4 being a prefabricated prefabricated integral component, and a stainless steel waterstop 5 at the bottom of the corbel steel components 3; the corbel steel components 3 include a web 301, a top plate 302, a corbel support plate 303, and an anchoring steel plate 304, the web 301 being located inside the expansion joint anchorage zone 2, the top plate 302 being located at the bottom of the polyurethane panel 4, and the corbel support plate 303 and the anchoring steel plate 304 being located on both sides of the web 301; The polyurethane panel 4 consists of two sets of cross-joint rutted areas 401 and an expansion joint 402 between them. It adopts a composite structure of highly flexible and elastic polyurethane elastomer and spring steel. The two sets of expansion joints 402 are W-shaped. By changing the size of the W-shaped angle, the requirements for expansion and contraction deformation are met. At the same time, it prevents dust and debris from clogging. The transverse bridge segment bonding and assembly also achieves the first waterproof barrier. The surface of the cross-joint rutted area 401 is provided with fixing holes 405 at equal intervals. Bolt anchors 406 are set inside the fixing holes 405. The corbel steel component 3 has high rigidity, high load-bearing capacity and good processing performance. The polyurethane panel 4 is highly flexible and elastic, has good noise reduction, weather resistance, corrosion resistance and fatigue resistance. The two complement each other with rigidity and flexibility, give full play to their respective performance, improve the safety and durability of the overall structure, and make the device have significant advantages.

[0020] This device, through the installation of the corbel steel component 3 and the polyurethane panel 4, solves the problems of existing expansion joint devices, such as the large impact on the beam during vehicle crossing, resulting in noise, affecting driving comfort and structural stability; the expansion joint is prone to damage due to stress concentration and fatigue failure, resulting in poor durability; and the device is also inadequate in terms of waterproofing, dustproofing, and sound insulation.

[0021] Furthermore, the stainless steel waterstop 5 includes fixing bolts 501 and a waterstop plate 502. The bottom of both sets of web plates 301 are provided with second positioning holes 306 at equal intervals. The waterstop plate 502 is disposed on the inner wall of the two sets of web plates 301. The fixing bolts 501 are inserted into the second positioning holes 306 to install the waterstop plate 502. The waterstop plate 502 is V-shaped. Figure 2 and Figure 5 As shown, this structure is used to be set in the center of the expansion joint by the waterstop plate 502 and suspended on the web plate 301 by the fixing bolts 501, together with the polyurethane panel 4 to provide double protection for sound insulation, dust prevention and waterproofing.

[0022] Furthermore, the top plate 302 adopts a wave-like arc shape, and the corbel support plate 303 is connected to the cantilever crest of the top plate 302 to meet the cantilever force requirements of the top plate 302 cantilevered on the web plate 301, thereby reducing the cantilever force and deformation of the top plate 302, avoiding stress concentration and fatigue failure, reducing vibration caused by vehicle impact, and reducing damage to the anchoring concrete's grip on the steel structure. An anchoring steel plate 304 is fixedly connected to the other side of the web plate 301, and the position of the anchoring steel plate 304 corresponds to the corbel support plate 303, balancing the external force transmitted from the corbel support plate 303 to the side of the web plate 301 and the bending moment of the top plate 302 cantilever. Figure 3 As shown, this structure is used to extend the expansion joint gap by using a top plate 302 with a wave-like arc shape at the end of the expansion joint, so that the wheels will not act on the straight line of the expansion joint at the same time, thereby reducing the impact stress concentrated on the beam and the resulting driving noise during the vehicle's crossing of the joint.

[0023] Furthermore, the two sets of cross-joint rutted areas 401 adopt a wavy arc shape, consistent with the shape of the steel structure top plate 302, i.e., a wave-like shape, which is aesthetically pleasing and rhythmic. The expansion joint 402 connects the two sets of cross-joint rutted areas 401 between their wavy arc shapes. The surface of the top plate 302 is provided with a first positioning hole 305 that matches the fixing hole 405. The cross-joint rutted areas 401 are fixed to the top plate 302 by bolt anchors 406. To prevent the bolts from loosening under high-frequency vibration, a double-layered anti-loosening ring is used, and an axial retaining spring is installed on the nut. Epoxy sealant is also injected into the top of the nut. Figure 4As shown, this structure is used to pass through the arc transition surface formed between the large and small arcs of the rut area 401. When the rut passes through, the bearing surface is increased, reducing the impact between the wheel and the arc transition section, meeting the bearing requirements of the expansion joint, mitigating the impact vibration effect of the wheel, and also having the functions of sound insulation, dustproofing, and waterproofing.

[0024] Furthermore, a protective zone 403 is provided at the top of the wavy arc of the cross-joint rut area 401. The protective zone 403 adopts a novel cantilevered elastic composite structure of spring steel plate and polyurethane elastomer. Figure 4 As shown, this structure is used to overcome the impact of ruts or vehicle bounce caused by the tilting or sinking of the bridge corner or the deformation of the rubber bearing through the protection zone 403, thereby achieving the functions of smooth driving, shock absorption and noise reduction.

[0025] Furthermore, grooves 404 are uniformly formed on the surface of the cross-joint rut area 401, and the grooves 404 are wavy in shape. For example... Figure 4 As shown, this structure is used to improve the anti-slip performance of the rutted area 401 across the joint by groove 404, and echoes and embellishes the wave shape to further enhance the aesthetic effect.

[0026] Furthermore, the expansion joint anchorage zone 2 includes a ring-shaped reinforcing bar 201 and a first horizontal reinforcing bar 202. The ring-shaped reinforcing bars 201 are equidistantly arranged inside the main bridge structure 1. Holes are formed inside the anchorage plate 304, and the first horizontal reinforcing bars 202 pass through these holes. C50 steel fiber reinforced concrete is used in the expansion joint anchorage zone 2. The ring-shaped reinforcing bars 201 are connected to the anchorage plate 304 and the pre-embedded reinforcing bars of the main bridge structure 1 via the first horizontal reinforcing bars 202. The corbel steel member 3 is firmly embedded within the anchorage plate 304. Figure 5 As shown, this structure is used to insert the first horizontal steel bar 202 into the expansion joint anchorage zone 2 through the hole in the anchorage steel plate 304, so that the corbel steel member 3 is firmly embedded in the expansion joint anchorage zone 2.

[0027] Furthermore, an expansion joint transition section 6 is provided on the upper side of the expansion joint anchorage zone 2. The expansion joint transition section 6 includes a U-shaped anchor bar 601 and a second horizontal reinforcing bar 602. The expansion joint anchorage zone 2 is internally provided with U-shaped anchor bars 601 and second horizontal reinforcing bars 602. Figure 5 As shown, the structure is located at the top of the expansion joint anchorage zone 2 via the expansion joint transition section 6. It is equipped with U-shaped anchor bars 601 to strengthen the anchorage and second horizontal steel bars 602. It uses polyurethane elastic mortar material to coordinate the connection between the flexible expansion joint and the rigid pavement structure.

[0028] Working principle: Before use, such as Figure 1 and Figure 5As shown, the expansion joint anchorage zone 2 and polyurethane panel 4 are first processed and manufactured in the factory to ensure that the quality of the components meets the design requirements; then the processed expansion joint anchorage zone 2 and polyurethane panel 4 are transported to the construction site, and pre-construction preparations are made, including site clearing, measurement and layout, etc.; then the ring steel bar 201 and the first horizontal steel bar 202 of the expansion joint anchorage zone 2, as well as the U-shaped anchor bar 601 and the second horizontal steel bar 602 of the expansion joint transition section 6 are arranged; then the corbel steel component 3 and the stainless steel waterstop 5 are installed, and the corbel is installed in sequence. Steel component 3 and stainless steel waterstop 5 are installed in place to ensure accurate positioning. The first horizontal steel bar 202 of the expansion joint anchoring zone 2 is inserted into the opening inside the anchoring steel plate 304 to firmly embed it. Then, C50 steel fiber concrete is poured into the expansion joint anchoring zone 2 to ensure the quality and strength of the concrete pouring. After the concrete in the anchoring zone reaches a certain strength, polyurethane elastic mortar is poured into the expansion joint transition section 6. Finally, polyurethane panel 4 is installed and installed on the corbel steel component 3 by bolt anchor 406 to ensure that the installation is firm and meets the design requirements. When using, such as Figure 3 and Figure 4 As shown, when a vehicle passes through the rutted area 401, the bearing surface is enlarged by the arc transition surface formed between the large and small arcs of the rutted area 401. Through the setting of the top plate 302, the corbel support plate 303 and the anchoring steel plate 304, the wheels will not act on the straight line of the expansion joint 402 at the same time, reducing the impact stress concentrated relative to the beam body and the resulting driving noise during the vehicle's crossing of the joint, reducing the impact between the wheels and the arc transition section, and meeting the bearing requirements of the expansion joint device by changing the W-shaped included angle of the expansion joint 402. The above is the complete working principle of this utility model.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A prefabricated vibration-damping and noise-reducing bridge expansion joint, comprising a bridge main structure (1), characterized in that: The main structure (1) of the bridge is provided with an expansion joint anchorage area (2), and two sets of corbel steel components (3) are provided inside the expansion joint anchorage area (2). The surface of the corbel steel components (3) is provided with a polyurethane panel (4), and the bottom of the corbel steel components (3) is provided with a stainless steel waterstop (5). The corbel steel component (3) includes a web plate (301), a top plate (302), a corbel support plate (303), and an anchoring steel plate (304). The web plate (301) is located inside the expansion joint anchoring area (2). The top plate (302) is located at the bottom of the polyurethane panel (4). The corbel support plate (303) and the anchoring steel plate (304) are located on both sides of the web plate (301). The polyurethane panel (4) consists of two sets of cross-joint rut areas (401) and an expansion area (402) between them. The two sets of expansion areas (402) are W-shaped. Fixing holes (405) are equidistantly opened on the surface of the cross-joint rut area (401). Bolt anchors (406) are provided inside the fixing holes (405).

2. The prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The stainless steel waterstop (5) includes fixing bolts (501) and waterstop plate (502). The bottom of the two sets of web plates (301) are provided with second positioning holes (306) at equal intervals. The waterstop plate (502) is set on the inner wall of the two sets of web plates (301). The fixing bolts (501) are inserted into the second positioning holes (306) to install the waterstop plate (502). The waterstop plate (502) is V-shaped.

3. The prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The top plate (302) adopts a wave-like arc shape, and the corbel support plate (303) is connected to the cantilever crest of the top plate (302). An anchoring steel plate (304) is fixedly connected to the other side of the web plate (301), and the position of the anchoring steel plate (304) corresponds to that of the corbel support plate (303).

4. The prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The two sets of cross-joint rut areas (401) adopt a wavy arc shape. The expansion joint (402) is connected between the wavy arc shapes of the two sets of cross-joint rut areas (401). The surface of the top plate (302) is provided with a first positioning hole (305) that matches the fixing hole (405). The cross-joint rut area (401) is fixed to the top plate (302) by bolt anchor (406).

5. A prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The top of the wavy arc of the cross-joint rut area (401) is provided with a protective area (403), which adopts a novel cantilever elastic composite structure of spring steel plate and polyurethane elastomer.

6. The prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The surface of the cross-seam rut area (401) is uniformly provided with grooves (404), and the grooves (404) are wavy in shape.

7. A prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The expansion joint anchorage area (2) includes a ring-shaped steel bar (201) and a first horizontal steel bar (202). The ring-shaped steel bar (201) is equidistantly arranged inside the main structure of the bridge (1). The anchorage steel plate (304) has holes inside, and the first horizontal steel bar (202) passes through the holes in the anchorage steel plate (304).

8. A prefabricated vibration-damping and noise-reducing bridge expansion joint according to claim 1, characterized in that: The upper side of the expansion joint anchorage area (2) is provided with an expansion joint transition section (6), the expansion joint transition section (6) includes a U-shaped anchor bar (601) and a second horizontal bar (602), and the interior of the expansion joint anchorage area (2) is provided with a U-shaped anchor bar (601) and a second horizontal bar (602).

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