Road bridge expansion joint noise reduction structure and monitoring system thereof

Abstract

The present application relates to the technical field of road and bridge construction, and particularly relates to a road and bridge expansion joint noise reduction structure and a monitoring system thereof, which solves the technical problem of poor noise reduction effect of the existing expansion joint in response to comprehensive load, and comprises: a noise reduction structure component capable of buffering impact force from above; a first expansion component arranged on both sides of the noise reduction structure component, a second expansion component arranged below the first expansion component so that the two constitute a layered structure, a pre-buried connecting component used to connect the first expansion component and the second expansion component and partially pre-buried on a precast site; and a balance support component capable of supporting the noise reduction structure component and maintaining the balance of the noise reduction structure component when the first expansion component and the second expansion component expand and contract. The principle actually used in the technical solution is a multi-stage buffering mode to buffer the impact force, thereby achieving the purpose of noise reduction.

Description

Technical Field

[0001] This invention relates to the field of road and bridge construction technology, and in particular to a noise reduction structure for road and bridge expansion joints and its monitoring system. Background Technology

[0002] Bridge expansion joints are "breathing" devices designed to accommodate the deformation of bridge structures. In addition to the loads from passing vehicles, natural environmental factors such as wind, rain, snow, and seasonal changes enable expansion joints to function as "breathing" devices. However, over time, with the continuous tangential and longitudinal loads generated by passing vehicles, if the expansion joints cannot function as "breathing" devices, the nearby road surface will experience arching, displacement, and damage under the combined effect of these loads.

[0003] The specific working principle of bridge expansion joints is as follows: Bridge expansion joints are important components of the bridge deck system. Their main function is to adjust the displacement and connection between the superstructure caused by vehicle loads and bridge components. They are usually set between the ends of two beams, between the beam end and the abutment, or at the hinged position of the bridge.

[0004] The "Design Specification for Highway Traffic Safety Facilities" (JTGD81-2017) stipulates that bridge railings should be equipped with expansion joints along with the main structure of the bridge, and the design of the expansion joints of the bridge railing beams should be consistent with the displacement of the bridge expansion joints. At the location of the expansion joints of the beams, on the one hand, it is necessary to ensure that the bridge can freely expand and contract; on the other hand, the structural continuity of the bridge railings should be considered.

[0005] In addition, bridge expansion joints are weak points in traffic safety protection. The guardrails at the expansion joints are the last line of defense against traffic accidents at that location. If the guardrails at the expansion joints are not strong enough or have an unreasonable structural design, they will not be able to effectively protect vehicles involved in accidents, and vehicles are very likely to be seriously stuck.

[0006] In existing technology, bridge expansion joints are assembled from a rubber sealing strip, a steel side beam, and anchors. The expansion joints are made of carefully selected neoprene rubber and are suitable for installation in areas with temperatures between -25°C and +60°C. They feature sealing and waterproofing, flexible expansion and contraction, smooth driving, and durability.

[0007] However, the noise is caused by the combined load. Chinese invention application, application number 201911041104.6, entitled "A Bridge Expansion Joint", relates to a bridge expansion joint, including a left-shaped steel and a right-shaped steel, and an elastic waterstop. A first noise-reducing plate is guided and mounted on both the left-shaped steel and the right-shaped steel. The first noise-reducing plate is provided with a first through hole. The left-shaped steel and the corresponding first noise-reducing plate form a first receiving groove, and the right-shaped steel and the corresponding first noise-reducing plate form a second receiving groove. The two ends of the elastic waterstop are respectively stuck in the first receiving groove and the second receiving groove. A first stop is provided on both the left-shaped steel and the right-shaped steel, and a second stop is provided on each of the first noise-reducing plates. A second noise-reducing plate is also fixed on both the left-shaped steel and the right-shaped steel. The second noise-reducing plate is provided with a second through hole. The materials of the first noise-reducing plate and the second noise-reducing plate are both sound-absorbing materials. By employing the bridge expansion joint of this invention, the first and second noise-reducing panels can effectively absorb the noise generated by passing vehicles, reducing noise levels and preventing impact on surrounding residents. However, relying solely on sound-absorbing materials is clearly insufficient to address the noise impact generated by combined loads. Summary of the Invention

[0008] This invention aims to solve the technical problem of poor noise reduction effect of existing expansion joints in dealing with comprehensive loads, and provides a noise reduction structure for road and bridge expansion joints and its monitoring system.

[0009] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0010] A noise reduction structure for road and bridge expansion joints includes:

[0011] Noise-reducing structural components that can buffer impact forces coming from above;

[0012] The first telescopic component is arranged on both sides of the noise reduction structure to form a telescopic buffer against the impact force.

[0013] The second telescopic component is arranged below the first telescopic component so that the two form a layer and can further balance and buffer the impact force.

[0014] An embedded connecting component, used to connect the first telescopic assembly and the second telescopic assembly, and partially embedded in a prefabricated location; and

[0015] A balancing support component is provided, which supports the noise reduction structure and maintains the balance of the noise reduction structure when the first telescopic component and the second telescopic component extend or retract.

[0016] Specifically, the noise reduction structural component includes:

[0017] Comb teeth and comb teeth mating parts;

[0018] The body, which is internally filled with a buffer material block, wherein the buffer material block is a polystyrene foam plastic structural block;

[0019] The main body has an upper plate, and a rail connection portion is provided on the upper plate;

[0020] The lower surfaces of the comb teeth and the comb teeth mating parts can be connected to the upper plate.

[0021] Specifically, the comb teeth mating parts have multiple equidistant gaps;

[0022] The comb-shaped component has multiple strip teeth;

[0023] The two sides of the strip tooth can be connected to a rail wheel;

[0024] The rail-connecting wheel can connect the comb teeth and the comb teeth to form a rail connection, so that the comb teeth and the comb teeth can move away from or closer to the body.

[0025] Specifically, the pre-embedded connecting components include:

[0026] The edge beam has a first connecting section located on one side and a second connecting section connected above it; and

[0027] The overhang extends horizontally toward the prefabricated gap.

[0028] Specifically, the embedded parts include:

[0029] The first connecting rib is constructed in a U-shape, with its first U-shaped end arranged on one side of the first connecting rib;

[0030] The second U-shaped end of the first connecting rib is connected to the cantilever portion;

[0031] The second connecting rib has one end connected to the U-shaped recess of the first connecting rib and the other end connected to the first connecting rib.

[0032] The third connecting bar partially overlaps with and connects to the first connecting bar.

[0033] Specifically, the body has a lower plate;

[0034] A counterweight is welded onto the lower plate.

[0035] Specifically, the first expansion component includes: two sets of first expansion joint structures;

[0036] Each group of the first expansion joint structure includes:

[0037] The first type F connector is fixedly connected to the second connector;

[0038] The first F mating part is formed on the side of the comb tooth and the comb tooth mating part;

[0039] The first telescopic plate has both ends that can be engaged with the first F-type connector and the first F mating part.

[0040] Specifically, the second expansion component includes: two sets of second expansion joint structures;

[0041] Each group of the second expansion joint structure includes:

[0042] The second type F connector is fixedly connected to the side beam;

[0043] The second F mating part is formed on the side of each of the counterweights;

[0044] The second telescopic plate has both ends that can be engaged with the second F-type connector and the second F mating part.

[0045] Specifically, the balance support component includes:

[0046] Two sets of hinged shaft seats symmetrically arranged below the counterweight;

[0047] The first ends of the two sets of hinged connecting rods are rotatably connected to the hinged shaft seat;

[0048] The two sets of hinged links are arranged in a cross configuration;

[0049] A guide rod is provided below each set of the cantilever sections;

[0050] A guide sleeve that can move along the guide rod is provided on the guide rod;

[0051] The second ends of the two sets of hinged connecting rods are rotatably connected to the corresponding guide sleeves;

[0052] A limit block is provided below the guide rod.

[0053] In addition, a monitoring system that applies the noise reduction structure of road and bridge expansion joints as described above also includes:

[0054] A pressure detection plate is disposed on the upper surface of the limiting block;

[0055] The pressure sensor is used to detect the pressure applied by the guide sleeve to the limiting block; the pressure transmitter has its detection input end connected to the pressure sensor and its output end connected to a recording module.

[0056] The recording module can transmit the pressure value via a wireless data transmission connection.

[0057] The present invention has the following beneficial effects:

[0058] The actual principle adopted in this technical solution is to buffer the impact force through a multi-stage buffering method, thereby achieving the purpose of noise reduction. Specifically, the noise reduction structural component itself has the function of an expansion joint, which balances the force generated in the tangential direction of the wheel when it rolls over the plane, thus achieving noise reduction. In addition, a secondary expansion joint is designed, which adopts the principle of rubber plate expansion joint, and the overall structure is weighted to make its own sound absorption effect better, ultimately achieving the purpose of noise reduction. Attached Figure Description

[0059] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0060] Figure 1 This is a schematic diagram of the structure of the present invention;

[0061] Figure 2 This is a partial enlarged view of the first telescopic component and the second telescopic component of the present invention;

[0062] Figure 3 This is a schematic diagram of the comb tooth mating component of the present invention;

[0063] Figure 4 This is a schematic diagram of the rail connection method of the present invention.

[0064] The reference numerals in the figure are:

[0065] Noise reduction structural component 10, first telescopic component 100, second telescopic component 200, pre-embedded connecting component 20, and balance support component 30;

[0066] Comb teeth 110, comb teeth mating parts 120;

[0067] Upper plate 101, rail connection 102;

[0068] Comb tooth mating part 120, clearance 121, strip tooth 111, rail connecting wheel 112;

[0069] First Connection Exhibition 201, Second Connection Exhibition 202;

[0070] Cantilever section 203, first connecting rib 301, second connecting rib 302, third connecting rib 303;

[0071] Counterweight 131, first F-type connector 41, first F-type mating part 401, first telescopic plate 410;

[0072] Second F-type connector 42, second F-type mating part 402, second telescopic plate 420;

[0073] Hinged connecting rod 320, guide rod 510, guide sleeve 520, limiting block 530;

[0074] Pressure sensor 610, pressure transmitter 620, recording module 630. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. It should be noted that, for ease of description, in this application, "left side" is referred to as "first end", "right side" as "second end", "upper side" as "first end", and "lower side" as "second end" in the current view. The purpose of such description is to clearly express the technical solution and should not be construed as an improper limitation of the technical solution of this application.

[0076] This invention aims to solve the technical problem of poor noise reduction effect of existing expansion joints when dealing with comprehensive loads. For the structural design, please refer to [link / reference needed]. Figure 1 , 2 As shown, the noise reduction structure for road and bridge expansion joints includes: a noise reduction structural member 10, which can buffer the impact force coming from above; a first expansion joint 100, which is arranged on both sides of the noise reduction structural member 10 to form an expansion and contraction buffer against the impact force; and a second expansion joint 200, which is arranged below the first expansion joint 100 so that the two form a layered structure and can further balance the buffering of the impact force. The actual principle adopted by this technical solution is to buffer the impact force in a multi-stage buffering manner, thereby achieving the purpose of noise reduction. Specifically, the noise reduction structural member 10 itself has the function of an expansion joint, balancing the impact force on the plane when the wheel rolls over it. The force generated in the tangential direction simultaneously reduces noise. In addition, a secondary expansion joint is designed, adopting the principle of rubber plate expansion joints, and the overall structure is weighted to improve its sound absorption effect, ultimately achieving the purpose of noise reduction. Specifically, after the weighting of the structural parts, a pre-embedded connecting component 20 is used to connect the first expansion component 100 and the second expansion component 200 and is partially pre-embedded in the prefabricated position 3; and a balance support component 30 is used to support the noise reduction structural component 10 and maintain the balance of the noise reduction structural component 10 when the first expansion component 100 and the second expansion component 200 expand and contract.

[0077] In one specific embodiment, please refer to Figure 1 , 2As shown in Figures 3 and 4, the noise reduction structural component 10 includes: a comb tooth component 110 and a comb tooth mating component 120; a body, the interior of which can be filled with a buffer material block, the buffer material block being a polystyrene foam plastic structural block; the body has an upper plate 101, on which a rail connection part 102 is provided; the lower surfaces of the comb tooth component 110 and the comb tooth mating component 120 can be rail-connected to the upper plate 101.

[0078] The comb tooth mating component 120 has multiple equidistant gaps 121; the comb tooth component 110 has multiple strip teeth 111; the two sides of the strip teeth 111 can be connected to the guide wheel 112; the guide wheel 112 can connect the comb tooth mating component 120 and the comb tooth component 110 to form a track connection, so that the comb tooth component 110 and the comb tooth mating component 120 can move away from or close to the body; in addition, the design of the guide wheel 112 can also remove the attached dust when rolling, extend the service life, and ensure that the noise reduction effect is reduced by other physical influences.

[0079] In one specific embodiment, please refer to Figure 1-4 As shown, the pre-embedded connecting component 20 includes: a side beam having a first connecting section 201 located on one side thereon and a second connecting section 202 connected above it; and a cantilever 203 extending horizontally toward the precast gap.

[0080] In one specific embodiment, please refer to Figure 1-4 As shown, the embedded part includes: a first connecting rib 301, which is U-shaped, with its first U-shaped end arranged on one side of the first connecting extension 201; the second U-shaped end of the first connecting rib 301 is connected to the cantilever 203; a second connecting rib 302, one end of which is connected to the U-shaped recess of the first connecting rib 301, and the other end of which is connected to the first connecting extension 201; and a third connecting rib 303, which partially overlaps with and connects to the first connecting rib 301.

[0081] In one specific embodiment, please refer to Figure 1-4 As shown, the first telescopic assembly 100 includes: two sets of first telescopic joint structures; each set of first telescopic joint structures includes: a first F-type connector 41, which is fixedly connected to the second connector 202; a first F-type mating part 401, which is formed on the side of the comb tooth 110 and the comb tooth mating part 120; and a first telescopic plate 410, whose two ends can be inserted into the first F-type connector 41 and the first F-type mating part 401.

[0082] In one specific embodiment, please refer to Figure 1-4As shown, the second expansion joint 200 includes: two sets of second expansion joint structures; each set of second expansion joint structures includes: a second F-type connector 42, which is fixedly connected to the side beam; a second F-type mating part 402, and a second F-type mating part 402 is formed on the side of the counterweight 131; and a second expansion plate 420, whose two ends can be inserted into the second F-type connector 42 and the second F-type mating part 402.

[0083] In one specific embodiment, please refer to Figure 1-4 As shown, the main body has a lower plate 130; a counterweight 131 is welded onto the lower plate 130, mainly using the counterweight 131 to complete the weighting process. The balance support component 30 includes: two sets of hinged shaft seats 310 symmetrically arranged below the counterweight 131; the first ends of two sets of hinged connecting rods 320 are rotatably connected to the hinged shaft seats 310; the two sets of hinged connecting rods 320 are arranged crosswise; a guide rod 510 is provided below each set of cantilevered parts 203; a guide sleeve 520 that can move along the guide rod 510 is provided on the guide rod 510; the second ends of the two sets of hinged connecting rods 320 are rotatably connected to the corresponding guide sleeves 520; a limit block 530 is provided below the guide rod 510; this design allows the balance support component 30 to continuously provide stability to the main body as it deforms with lateral displacement, effectively addressing the drawbacks of lateral movement after weighting.

[0084] Another feature of this invention is the monitoring of the impact of sudden loads or high noise loads, i.e., how to monitor the noise generation of the bridge to obtain reliable data for use management planning. Specifically, the monitoring system further includes: a pressure detection plate 610, which is disposed on the upper surface of the limiting block 530; the pressure detection plate 610 is used to detect the pressure applied by the guide sleeve 520 to the limiting block 530; a pressure transmitter 620, whose detection input end is connected to the pressure detection plate 610, and whose output end is connected to a recording module 630; the recording module 630 can transmit pressure values ​​via wireless data transmission; when there is a sudden load, the sudden load will generate an instantaneous force, which is a comprehensive force.

[0085] However, large loads generally bring about large noise. The actual manifestation of a large load is a force in the vertical direction, that is, perpendicular to the road surface. When a large load arrives, it exceeds the part that this device can effectively reduce or offset. This force will not change. Here, the pressure detection plate 610 is used to obtain the parameters of this force. Obviously, this parameter is not the direct value of the generated force, but a signal that can reflect the comprehensive load after reduction. The general force will be handled by the structural part of this device through expansion and contraction noise reduction. The point identified is obviously unconventional. We can use this point to know the number of times a large load can affect the bridge section. With the cooperation of monitoring and statistics, we can find out what kind of vehicle type and at what speed this impact occurred. This is also one of the directions for future research.

[0086] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A noise reduction structure for road and bridge expansion joints, characterized in that, include: Noise-reducing structural component (10) that can buffer the impact force coming from above; A first telescopic component (100) is arranged on both sides of the noise reduction structure (10) to form a telescopic buffer against the impact force. A second telescopic component (200) is arranged below the first telescopic component (100) so that the two form a layer and can further balance and buffer the impact force. An embedded connecting component (20) is provided for connecting the first telescopic assembly (100) and the second telescopic assembly (200) and is partially embedded in the prefabricated position (3); and A balancing support component (30) is provided to support the noise reduction structure (10) and maintain the balance of the noise reduction structure (10) when the first telescopic component (100) and the second telescopic component (200) extend and retract. The noise reduction structural component (10) includes: Comb teeth (110) and comb teeth mating parts (120); The body, which is internally filled with a buffer material block, wherein the buffer material block is a polystyrene foam plastic structural block; The main body has an upper plate (101), and a rail connection part (102) is provided on the upper plate (101); The lower surfaces of the comb teeth (110) and the comb teeth mating parts (120) can be tracked on the upper plate (101); The pre-embedded connecting component (20) includes: The side beam has a first connecting section (201) located on one side and a second connecting section (202) connected above it; The overhang (203) extends horizontally toward the prefabricated gap; The body has a lower plate (130); A counterweight (131) is welded onto the lower plate (130); The balance support component (30) includes: Two sets of hinged bearings (310) are symmetrically arranged below the counterweight (131); The first ends of the two sets of hinged connecting rods (320) are rotatably connected to the hinged bearing (310); The two sets of hinged connecting rods (320) are arranged crosswise; A guide rod (510) is provided below each set of the cantilever (203); A guide sleeve (520) that can move along the guide rod (510) is provided on the guide rod (510); The second ends of the two sets of hinged connecting rods (320) are rotatably connected to the corresponding guide sleeves (520); A limit block (530) is provided below the guide rod (510).

2. The noise reduction structure for road and bridge expansion joints as described in claim 1, characterized in that, The comb teeth mating part (120) has a plurality of equidistant gaps (121); The comb-shaped component (110) has multiple strip teeth (111); The two sides of the strip tooth (111) can be connected to the rail wheel (112); The rail-connecting wheel (112) can connect the comb tooth mating member (120) and the comb tooth member (110) to form a rail connection, so that the comb tooth member (110) and the comb tooth mating member (120) can move away from or close to the body.

3. The noise reduction structure for road and bridge expansion joints as described in claim 2, characterized in that, It also features: embedded parts; The embedded parts include: The first connecting rib (301) is U-shaped, with its first U-shaped end arranged on one side of the first connecting rib (201); The second U-shaped end of the first connecting rib (301) is connected to the cantilever portion (203); The second connecting rib (302) has one end connected to the U-shaped recess of the first connecting rib (301) and the other end connected to the first connecting rib (201). The third connecting bar (303) partially overlaps with the first connecting bar (301).

4. The noise reduction structure for road and bridge expansion joints as described in claim 3, characterized in that, The first expansion joint (100) includes: two sets of first expansion joint structures; Each group of the first expansion joint structure includes: The first F-type connector (41) is fixedly connected to the second connector (202); A first F mating part (401) is formed on the side of the comb tooth member (110) and the comb tooth mating part (120); The first telescopic plate (410) has both ends that can be inserted into the first F-type connector (41) and the first F-type mating part (401).

5. The noise reduction structure for road and bridge expansion joints as described in claim 4, characterized in that, The second expansion joint (200) includes: two sets of second expansion joint structures; Each group of the second expansion joint structure includes: The second type F connector (42) is fixedly connected to the side beam; The second F mating part (402) is formed on the side of each of the counterweights (131); The second telescopic plate (420) has both ends that can be inserted into the second F-type connector (42) and the second F mating part (402).

6. A monitoring system applied to the noise reduction structure of road and bridge expansion joints as described in claim 5, characterized in that, It also includes: A pressure detection plate (610) is disposed on the upper surface of the limiting block (530); The pressure detection piece (610) is used to detect the pressure applied by the guide sleeve (520) to the limiting block (530); A pressure transmitter (620) has its detection input connected to the pressure detection plate (610) and its output connected to a recording module (630). The recording module (630) is able to transmit the pressure value via a wireless data transmission connection.

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