Detachable anti-dazzle and noise-reduction barrier unit with ventilation performance and installation method of detachable anti-dazzle and noise-reduction barrier unit

Abstract

The invention relates to the technical field of bridge engineering, in particular to a detachable anti-dazzle noise reduction barrier unit with ventilation and an installation method. Comprising a barrier unit body, a plurality of acoustic unit bearing parts which are sequentially arranged from left to right are arranged in the barrier unit body, the acoustic unit bearing parts are all arranged in the height direction of the barrier unit in a full-length mode, and a plurality of acoustic unit installation positions are arranged on the acoustic unit bearing parts in the height direction. A plurality of acoustic unit mounting positions are arranged on the barrier unit body, acoustic units are correspondingly mounted on the plurality of acoustic unit mounting positions, one ends of the plurality of acoustic units are jointly provided with an inner connecting plate, the other ends of the plurality of acoustic units are jointly provided with an outer connecting plate, and the inner connecting plate and the outer connecting plate are detachably connected with the barrier unit body; the transverse ventilation function is achieved, disassembly, cleaning, maintenance and replacement can be conveniently and rapidly conducted, and the repeated utilization rate is high; the noise reduction function is achieved, and the good anti-dazzle effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a detachable anti-glare and noise reduction barrier unit with air permeability and an installation method thereof. Background Art

[0002] As a novel structure of river crossing channel, the dual-use road-rail bridge can maximize the use of space and save construction resources, achieving friendly coexistence with the environment; the dual-use road-rail bridge has two forms: upper and lower two-layer and flat bridge deck layout; in recent years, the application of flat-layer bridge engineering projects has gradually increased. Due to the particularity of this type of bridge deck layout, the impact of railway trains on the adjacent highway is mainly airflow, glare and noise problems.

[0003] Strong winds are one of the main threats facing large bridges. When vehicles or trains are traveling on bridges, excessive gusts or sudden changes in wind speed may cause the vehicle or train to lose control and veer sideways, making a collision more likely to occur. The headlights of railway trains will cause serious glare to cars traveling in the opposite direction. The disabling glare will strongly interfere with the driver's visible field of vision, affecting driving and even causing accidents, which is extremely harmful. In addition, high-speed trains will also generate huge aerodynamic noise. Research results show that noise has a negative impact on human hearing, blood pressure, blood sugar and other indicators, and will also reduce reaction ability and work efficiency, greatly affecting the driving safety and comfort of road traffic.

[0004] In order to ensure the driving safety of trains in strong winds and on parallel roads and solve the above-mentioned problems, the following measures are included in the actual application of the project: setting up wind barriers to reduce wind speed, which can effectively reduce the lateral wind speed at the train position, thereby reducing the impact of side winds on trains and improving the safety of train driving on bridges; for anti-glare measures, the anti-glare facilities commonly used on roads currently include anti-glare panels, anti-glare nets and plant anti-glare. Anti-glare panels are a type of anti-glare facility structure currently commonly used on my country's highways. They can block glare at a long distance. The anti-glare net has a beautiful appearance, a small contact area and is not easy to get dusty. It can ensure that the driver has good lateral visibility while meeting various technical requirements for anti-glare. Plant anti-glare is suitable for general sections of highways with wide central dividing strips. In addition to anti-glare, it also has the functions of beautifying the road, guiding the driver's line of sight, and relieving the driver's mental and physical fatigue. In order to reduce the impact of train noise on car drivers, enhance the driver's concentration and adaptability, and improve driving safety, it is particularly important to install noise reduction measures such as sound barriers between trains and cars on the same-level bridges between road and rail. This measure is also the most practical, efficient and economical form. The most widely used railway sound barrier is the upright plug-in sound barrier.

[0005] In summary, the measures used in the project can solve the problems of airflow, glare and noise to a certain extent, but they also have certain limitations and create new problems; the plug-in type upright sound barrier can block crosswinds, but because it is an airtight structure, it will not only increase the windproof area of ​​the bridge, but also interfere with the flow field of the vehicle-bridge system, affect the aerodynamic performance of the bridge and the subsequent wind-resistant design; because it is repeatedly subjected to train pulsating wind, natural wind and other external loads, the sound barrier structure may suffer from structural instability and damage, and the fastening bolts at the bottom and other joints are likely to loosen and fall off, and the steel column structure may also suffer from fatigue damage, which will greatly reduce the operational safety of highways, especially railways; in order to shield train glare, anti-glare panels are generally installed on the top of the sound barrier to achieve anti-glare and noise reduction. Therefore, on the same-level bridges of road and railway, the installation height of the upright sound barrier is subject to certain restrictions, and the noise reduction effect is limited. Summary of the invention

[0006] The present invention aims to solve the above-mentioned problems, thereby providing a breathable, detachable anti-glare and noise reduction barrier unit and an installation method, which has a lateral ventilation function, has good wind resistance on the same-level road-rail bridges with strong crosswinds, is not easy to overturn, can be disassembled, cleaned, maintained and replaced conveniently and quickly, has a high reuse rate, saves materials and costs; and realizes the noise reduction function, has an excellent anti-glare effect, and can shield the glare generated by trains on car lanes.

[0007] The present invention solves the above-mentioned problem by adopting the following technical solution:

[0008] A detachable anti-glare noise reduction barrier unit with air permeability comprises a barrier unit body, a plurality of acoustic unit bearing parts arranged in sequence from left to right are arranged in the barrier unit body, the acoustic unit bearing parts are arranged along the height direction of the barrier unit body, a plurality of acoustic unit mounting positions are arranged on the acoustic unit bearing parts along the height direction, acoustic units are correspondingly mounted on the plurality of acoustic unit mounting positions, an inner connecting plate is commonly arranged on one end of the plurality of acoustic units, an outer connecting plate is commonly arranged on the other end of the plurality of acoustic units, and the inner connecting plate and the outer connecting plate are both detachable from the barrier unit body Connection; the acoustic unit includes a sleeve with a hollow cylindrical structure, a protruding annular boss is arranged on the inner wall of one end of the sleeve, a plurality of acoustic unit components are arranged and installed in sequence in the sleeve, a screw cover with a hole is threadedly connected to the other end of the sleeve, and an air channel is commonly arranged on the screw cover with a hole, the plurality of acoustic unit components and the annular boss along the axial direction of the sleeve; the plurality of acoustic unit components have the same structure and are all in the shape of a round cake and are provided with an air through hole in the center, a plurality of resonance cavities are evenly arranged on the acoustic unit component with the center of the air through hole as the center, and a connecting through hole connected to the air through hole is arranged on the plurality of resonance cavities.

[0009] Preferably, a rubber pad is provided between two adjacent acoustic unit components, and a round hole matching the air channel is provided on the rubber pad.

[0010] Preferably, vertical stiffening ribs are provided between adjacent acoustic unit bearing parts, the vertical stiffening ribs are fixed in the barrier unit body and are arranged throughout the height direction, horizontal connecting strips arranged at intervals along the height direction are provided on both sides of the vertical stiffening ribs, and a fixed sliding groove is provided on the outer wall of the sleeve, which is arranged throughout the axial direction and is adapted to the horizontal connecting strip.

[0011] Preferably, a plurality of connecting ear plates are provided on the barrier unit body and at least one vertical stiffening rib along the height direction, and the inner connecting plates and the outer connecting plates are both connected to the connecting ear plates by bolts.

[0012] Preferably, mounting holes matching the outer diameter of the sleeve are provided on both the inner connecting plate and the outer connecting plate, the number of the mounting holes is consistent with the number of the acoustic units, and a number of micro-perforations are evenly distributed on the outer connecting plate.

[0013] Preferably, a plurality of rain shielding covers are provided on the outer sides of the inner connecting plate and the outer connecting plate, the plurality of rain shielding covers are arranged at intervals up and down along the height direction of the barrier unit body, and the plurality of rain shielding covers are arranged along the length direction of the barrier unit body.

[0014] Preferably, the rain cover includes a rain shield plate tilted outward from top to bottom, and a plurality of triangular stiffening ribs are arranged at intervals along the inner edge of the rain shield plate in the length direction, and the plurality of triangular stiffening ribs are fixed on the outer side of the inner connecting plate or the outer connecting plate.

[0015] Preferably, a connecting protrusion is arranged on the top of the barrier unit body, a connecting groove matched with the connecting protrusion is arranged on the bottom of the barrier unit body, and anti-sliding blocks are arranged on the left and right sides of the barrier unit body.

[0016] Preferably, the acoustic unit installation position is also filled with glass sound-absorbing cotton to cover the acoustic unit.

[0017] A method for installing a detachable anti-glare and noise reduction barrier unit with air permeability comprises the following steps:

[0018] S1. Conduct noise detection on the actual work site, determine the proposed noise reduction frequency band based on the noise detection results, and then determine the construction location;

[0019] S2. Pre-construct H-shaped steel columns according to the construction location and reserve installation space for the removable anti-glare and noise reduction barrier unit;

[0020] S3. Assemble the detachable anti-glare and noise reduction barrier unit in the factory, place the assembled acoustic unit in the acoustic unit installation position, fill the acoustic unit installation position with glass sound-absorbing cotton, and then fix the inner connecting plate, outer connecting plate and rain cover plate;

[0021] S4. Then, the detachable anti-glare and noise reduction barrier units assembled in the factory are transported to the construction site, and then the detachable anti-glare and noise reduction barrier units are inserted and fixed into the reserved installation space of the detachable anti-glare and noise reduction barrier units one by one.

[0022] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features:

[0023] The detachable anti-glare and noise reduction barrier unit of the present invention has a transverse ventilation function and has good wind resistance on a highway-railway same-level bridge with a large crosswind. It not only has good ventilation performance but is also not prone to overturning, thereby increasing the installation height of the detachable anti-glare and noise reduction barrier unit.

[0024] The design of the detachable anti-glare noise reduction barrier unit of the present invention is conducive to the operation of the line and the maintenance of the detachable anti-glare noise reduction barrier unit. The acoustic unit component is loaded in the sleeve, and the inner connecting plate and the outer connecting plate are bolted to the barrier unit body, so that the detachable anti-glare noise reduction barrier unit can be easily and quickly disassembled, cleaned, maintained and replaced, with a high reuse rate, saving materials and costs;

[0025] The detachable anti-glare noise reduction barrier unit of the present invention is an acoustic unit element designed based on the principle of local resonance noise reduction. By changing and optimizing the design parameters, the acoustic unit element can have different effective noise reduction frequencies, and by superimposing acoustic unit elements with different effective noise reduction frequencies, the composed acoustic unit can have the characteristics of broadband noise reduction. In engineering applications, the proposed noise reduction frequency band can be determined according to the specific location of the actual work site, thereby realizing the noise reduction function;

[0026] The detachable anti-glare and noise reduction barrier unit of the present invention can effectively reduce the entry of rainwater through the rain cover, reduce the accumulation of rainwater in the detachable anti-glare and noise reduction barrier unit and the infiltration of rainwater into the internal glass sound-absorbing cotton, thereby ensuring the good noise reduction effect of the detachable anti-glare and noise reduction barrier unit; at the same time, due to the existence of the rain cover and the large lateral equivalent shading angle of the detachable anti-glare and noise reduction barrier unit, the detachable anti-glare and noise reduction barrier unit also has an excellent anti-glare effect and can shield the glare generated by the train on the car road. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the facade structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the barrier unit body of the present invention;

[0029] Figure 3 It is a schematic diagram of the elevation structure of the acoustic unit element of the present invention;

[0030] Figure 4 It is a schematic cross-sectional structural diagram of the acoustic unit element of the present invention;

[0031] Figure 5 It is a schematic diagram of the acoustic unit element stacking structure of the present invention;

[0032] Figure 6 It is a schematic diagram of the vertical structure of the sleeve of the present invention;

[0033] Figure 7 is a schematic diagram of the facade structure of the acoustic unit of the present invention;

[0034] Figure 8 It is a schematic diagram of the facade structure of the rain cover plate of the present invention;

[0035] Fig. 9 is a schematic diagram of the acoustic unit installation structure of the present invention;

[0036] Fig.10 It is a schematic diagram of the insertion loss spectrum curve of the acoustic unit of low-frequency noise reduction of the present invention;

[0037] Fig.11 It is a schematic diagram of the insertion loss spectrum curve of the acoustic unit for high frequency noise reduction of the present invention;

[0038] Fig.12 It is a schematic diagram of the elevation structure of the broadband detachable anti-glare and noise reduction barrier unit of the present invention;

[0039] Fig.13 It is a schematic diagram of the insertion loss spectrum curve of the broadband detachable anti-glare noise reduction barrier unit of the present invention;

[0040] In the figure: 1. Barrier unit body; 2. Acoustic unit; 3. Inner connecting plate; 4. Outer connecting plate; 5. Sleeve; 6. Annular boss; 7. Acoustic unit component; 8. Perforated screw cap; 9. Air channel; 10. Air through hole; 11. Resonance cavity; 12. Connecting through hole; 13. Rubber pad; 14. Vertical stiffening rib; 15. Horizontal connecting strip; 16. Fixed slide; 17. Connecting ear plate; 18. Rain cover; 19. Rain shield; 20. Triangular stiffening rib plate; 21. Connecting protrusion; 22. Connecting groove; 23. Anti-sliding block. DETAILED DESCRIPTION

[0041] The following description of the embodiments will help the public better understand the present invention, but the specific embodiments given by the applicant cannot and should not be regarded as limitations on the technical solutions of the present invention. Any changes to the definitions of components or technical features and / or formal but not substantial changes to the overall structure should be regarded as the scope of protection defined by the technical solutions of the present invention.

[0042] See also Figures 1 to 13 As shown, the technical solution of the present invention is as follows:

[0043] A detachable anti-glare and noise reduction barrier unit with air permeability comprises a barrier unit body 1. The specification of the barrier unit body 1 is determined according to actual construction requirements. A connecting protrusion 21 is arranged on the top of the barrier unit body 1, and a connecting groove 22 is arranged on the bottom of the barrier unit body 1. The connecting protrusion 21 and the connecting groove 22 are adapted to be connected, so that a plurality of detachable anti-glare and noise reduction barrier units can be quickly disassembled when stacked up and down. Anti-sliding blocks 23 are arranged on the left and right sides of the barrier unit body 1, so that The DEK detachable anti-glare noise reduction barrier unit is conveniently fixed between two upright steel columns. Sixteen acoustic unit bearing parts are arranged in the barrier unit body 1. The sixteen acoustic unit bearing parts are arranged along the height direction in the barrier unit body 1 and arranged in sequence from left to right. Vertical stiffening ribs 14 are fixed between adjacent acoustic unit bearing parts. The vertical stiffening ribs 14 are fixed in the barrier unit body 1 along the height direction, so that two adjacent acoustic unit bearing parts are separated by the vertical stiffening ribs 14. A plurality of acoustic unit installation positions are arranged along the height direction on the upper and lower parts of the vertical stiffening ribs 14, and a plurality of horizontal connecting clips 15 are fixed on both sides of the vertical stiffening ribs 14. The plurality of horizontal connecting clips 15 are arranged at intervals in the height direction of the vertical stiffening ribs 14, so that the two upper and lower adjacent acoustic unit installation positions are separated from each other by the horizontal connecting clips 15. The acoustic unit installation positions are correspondingly installed with an acoustic unit 2, and one end of the plurality of acoustic units 2 is commonly connected with an inner connecting plate 3, and the other end of the plurality of acoustic units 2 is connected with an inner connecting plate 3. They are commonly connected with an outer connecting plate 4. In addition, the acoustic unit installation position and the horizontal connecting strip 15 are determined according to actual needs during application. The inner connecting plate 3 and the outer connecting plate 4 are detachably connected to the barrier unit body 1, so that the acoustic unit 2 is limited and fixed by the cooperation of the inner connecting plate 3 and the outer connecting plate 4 to prevent the acoustic unit 2 from leaving the acoustic unit installation position; the acoustic unit installation position is also filled with glass sound-absorbing cotton, which covers the acoustic unit 2, thereby increasing the sound absorption performance of the removable anti-glare and noise reduction barrier unit.

[0044] Six rain shielding covers 18 are fixed on the outer sides of the inner connecting plate 3 and the outer connecting plate 4. The material of the rain shielding covers 18 is epoxy resin. The six rain shielding covers 18 are arranged along the length direction of the barrier unit body 1 and are the same length as the barrier unit body 1. The six rain shielding covers 18 are arranged at intervals up and down along the height direction of the barrier unit body 1. The rain shielding covers 18 include rain shielding plates 19 arranged to be inclined outward from top to bottom. The inclination angle of the rain shielding plates 19 is 30°, that is, it is 30° with the vertical plane. There are five triangular stiffening ribs 20, which are all fixed on the outer side of the inner connecting plate 3 or the outer connecting plate 4, and the 90° angles and 60° angles of the triangular stiffening ribs 20 are chamfered; the rain cover 18 can effectively reduce the entry of rainwater, reduce the accumulation of rainwater in the removable anti-glare and noise reduction barrier unit and the infiltration of the internal glass sound-absorbing cotton, ensure the good noise reduction effect of the removable anti-glare and noise reduction barrier unit, and also have excellent anti-glare effect, which can shield the glare generated by the train to the car road.

[0045] The acoustic unit 2 includes a sleeve 5 with a hollow cylindrical structure. The length of the sleeve 5 is determined according to actual construction requirements. A fixed slide groove 16 is arranged along the axial length on the outer wall of the sleeve 5. The fixed slide groove 16 is adapted to be connected with the horizontal connecting clip 15, so that the acoustic unit 2 is fixed on the acoustic unit installation position. A protruding annular boss 6 is arranged on the inner wall of one end of the sleeve 5. A plurality of acoustic unit components 7 are arranged in sequence in the sleeve 5. The acoustic unit components 7 are determined according to actual requirements. A rubber pad 13 is arranged between two adjacent acoustic unit components 7. A screw cap 8 with a hole is threadedly connected to the other end of the sleeve 5. An air passage 9 is commonly provided on the perforated screw cap 8, the rubber pad 13, several acoustic unit components 7 and the annular boss 6, and is penetrated axially along the sleeve 5. A circular hole matching the air passage 9 is reserved on the rubber pad 13, and the rubber pad 13 is used to isolate the air and enhance the sealing, while also achieving a vibration reduction effect, thereby preventing the acoustic unit components 7 from colliding with each other and causing wear. In addition, the acoustic unit component 7 in the sleeve 5 can be protected after the sleeve 5 and the perforated screw cap 8 are tightened and fixed. Since the acoustic unit component 7 is loaded into the sleeve 5 and the perforated screw cap 8, the replacement and customization of the acoustic unit component 7 can be completed by loosening the perforated screw cap 8, and the assemblability is strong.

[0046] Several acoustic unit components 7 have the same structure and are all in the shape of round cakes with an air hole 10 arranged in the center. The inner diameter of the acoustic unit component 7 is R1, the outer diameter is R2, the opening rate is: the square of R1 divided by the square of R2, the unit thickness is H, and six resonance cavities 11 are evenly arranged on the acoustic unit component 7 with the center of the air hole 10 as the center. Each resonance cavity 11 occupies a central angle of 60°, and a connecting hole 12 connected to the air hole 10 is arranged on the six resonance cavities 11. The length of the connecting hole 12 is l and the radius is r. The material of the acoustic unit component 7 is epoxy resin, which is not only light in weight, but also has good heat resistance and waterproof properties and a long service life.

[0047] Three connecting ear plates 17 are fixed on the barrier unit body 1 and the three vertical stiffening ribs 14. The three connecting ear plates 17 are spaced apart in the vertical direction, and the inner connecting plate 3 and the outer connecting plate 4 are bolted to the connecting ear plates 17; so that the inner connecting plate 3 and the outer connecting plate 4 are fixed on the vertical stiffening ribs 14 of the barrier unit body 1; mounting holes matching the outer diameter of the sleeve 5 are provided on the inner connecting plate 3 and the outer connecting plate 4, and the number of mounting holes is consistent with the number of acoustic units 2. A number of micro-perforations are also evenly distributed on the outer connecting plate 4, and the micro-perforations facilitate the sound absorption of the internal sound-absorbing cotton; the inner connecting plate 3 and the outer connecting plate 4 are both made of 3mm color steel plates, and the mounting holes are concentric with the air channel 9, and the radius of the mounting holes is R1+1cm; so that the acoustic unit 2 is limited and fixed by the inner connecting plate 3 and the outer connecting plate 4.

[0048] In the actual implementation process, according to the research of relevant literature, it is concluded that railway noise presents a broadband distribution. According to the distribution characteristics of train noise, the noise frequency band to be controlled is determined to be 500-2000Hz in the embodiment of the present invention; when there is only one acoustic unit element 7, the noise reduction effect at one frequency can be achieved, and the arrangement and combination of multiple acoustic unit elements 7 with different structural designs and sizes can achieve broadband noise reduction effects within multiple frequency ranges; the design parameters of the acoustic unit element 7 can be combined in different ways, in order to make the removable anti-glare noise reduction barrier unit have the noise reduction frequency band to be achieved in this embodiment, The design parameters of the inner diameter R1, outer diameter R2, unit thickness H, length l of the connecting through hole 12 and radius r of the connecting through hole 12 of the acoustic unit element 7 are optimized according to the effective noise reduction frequency; the acoustic unit elements 7 of different effective frequencies are stacked, and rubber pads 13 are added between the acoustic unit elements 7 to prevent friction and collision between the acoustic unit elements 7, and the stacked acoustic unit elements 7 are loaded into the sleeve 5 and tightened with the perforated screw cover 8, and finally the acoustic unit 2 for low-frequency noise reduction and the acoustic unit 2 for high-frequency noise reduction are designed, and the thickness of the above two acoustic units 2 is 130 mm, and the outer diameters are 40 mm and 20 mm respectively;

[0049] Consider establishing two acoustic models of acoustic units 2 in finite element software, with the boundaries set as hard sound field boundaries or periodic boundaries; the models are all set with a vertically incident background pressure field with an amplitude of 1Pa, and perfect matching layers are added to the cylinders at both ends to absorb excess sound waves that may interfere with the results. The insertion loss of the acoustic unit 2 can be calculated based on the pressure difference between the front and rear ends, and the noise reduction frequency band curve of the structure can be obtained; the frequency corresponding to the insertion loss peak is called the effective frequency, and the low-frequency unit calculation starts from 500Hz and ends at 1200Hz, with a step size of 1Hz; the high-frequency unit calculation starts from 900Hz and ends at 2500Hz, with a step size of 1Hz;

[0050] Then the frequency spectrum curves of the two acoustic units 2 are as follows: Fig.10 and Fig.11 As shown; from the calculation results, it can be seen that the effective frequency band of the acoustic unit 2 for low-frequency noise reduction is 545-1050Hz, the insertion loss in this range is higher than 20dB, and the noise reduction performance is good; the effective frequency band of the acoustic unit 2 for high-frequency noise reduction is 1015-2045Hz, the insertion loss in this range is higher than 20dB, and the noise reduction performance is good; the effective frequencies of the two acoustic units 2 are given above.

[0051] In another embodiment, the above-mentioned low-frequency noise reduction acoustic unit 2 and high-frequency noise reduction acoustic unit 2 are combined to construct a broadband detachable anti-glare noise reduction barrier unit, and 16 low-frequency noise reduction acoustic units 2 are arranged horizontally along the broadband detachable anti-glare noise reduction barrier unit, with a center spacing of 90 mm; 6 low-frequency noise reduction acoustic units 2 are arranged vertically, with a spacing of 90 mm, and a total of 96 low-frequency noise reduction acoustic units 2 are arranged;

[0052] In order to make the detachable anti-glare noise reduction barrier unit reach the intended noise reduction frequency band of 500-2000Hz, and in order to utilize the internal space of the detachable anti-glare noise reduction barrier unit, a high-frequency noise reduction acoustic unit 2 is arranged between the low-frequency noise reduction acoustic units 2; after calculation, the gap between the low-frequency noise reduction acoustic units 2 is sufficient to install the high-frequency noise reduction acoustic unit 2, and the installation diagram is shown as follows Fig.12 As shown, in the detachable anti-glare noise reduction barrier unit, 15 rows of high-frequency noise reduction acoustic units 2 are arranged horizontally, and 5 are arranged vertically, so a total of 75 high-frequency noise reduction acoustic units 2 can be installed;

[0053] The finite element calculation method is also used. The dispersion curve of the broadband detachable anti-glare and noise reduction barrier unit is as follows Fig.13 As shown; the calculation results show that the broadband detachable anti-glare noise reduction barrier unit composed of the combination of the low-frequency noise reduction acoustic unit 2 and the high-frequency noise reduction acoustic unit 2 can achieve a broadband noise reduction effect of more than 14.4dB between 500-2400Hz.

[0054] A method for installing a detachable anti-glare and noise reduction barrier unit with air permeability comprises the following steps:

[0055] S1. Conduct noise detection on the actual work site, determine the proposed noise reduction frequency band based on the noise detection results, and then determine the construction location;

[0056] S2. Pre-construct H-shaped steel columns according to the construction location and reserve installation space for the removable anti-glare and noise reduction barrier unit;

[0057] S3. Assemble the removable anti-glare and noise reduction barrier unit in the factory, place the acoustic unit components 7 in the sleeve 5 in sequence, place the rubber pad 13 between two adjacent acoustic unit components 7, and then tighten the screw cap 8 with holes, and then complete the assembly of the remaining acoustic units 2; insert each acoustic unit 2 into the acoustic unit installation position in sequence, and fill the acoustic unit installation position with glass sound-absorbing cotton, then fix the inner connecting plate 3 and the outer connecting plate 4 to the connecting ear plate 17 by bolts, and finally fix the rain cover plate 18 to the outer side surfaces of the inner connecting plate 3 and the outer connecting plate 4 in sequence;

[0058] S4. Then, the detachable anti-glare and noise reduction barrier units assembled in the factory are transported to the construction site, and then the detachable anti-glare and noise reduction barrier units are inserted and fixed into the reserved installation space of the detachable anti-glare and noise reduction barrier units one by one.

[0059] The detachable anti-glare and noise reduction barrier unit of the present invention has a transverse ventilation function and has good wind resistance on a highway-railway same-level bridge with a large crosswind. It not only has good ventilation performance but is also not prone to overturning, thereby increasing the installation height of the detachable anti-glare and noise reduction barrier unit.

[0060] The design of the detachable anti-glare noise reduction barrier unit of the present invention is conducive to the operation of the line and the maintenance of the detachable anti-glare noise reduction barrier unit. The acoustic unit 2 is loaded in the sleeve 5, and the inner connecting plate 3 and the outer connecting plate 4 are bolted to the barrier unit body 1, so that the detachable anti-glare noise reduction barrier unit can be easily and quickly disassembled, cleaned, maintained and replaced, with a high reuse rate, saving materials and costs;

[0061] The detachable anti-glare noise reduction barrier unit of the present invention is an acoustic unit element 7 designed based on the principle of local resonance noise reduction. By changing and optimizing the design parameters, the acoustic unit element 7 can have different effective noise reduction frequencies, and by superimposing the acoustic unit elements 7 with different effective noise reduction frequencies, the composed acoustic unit 2 can have the characteristics of broadband noise reduction. In engineering applications, the proposed noise reduction frequency band can be determined according to the specific location of the actual work site, thereby realizing the noise reduction function;

[0062] The removable anti-glare and noise reduction barrier unit of the present invention can effectively reduce the entry of rainwater through the rain cover 18, reduce the accumulation of rainwater in the removable anti-glare and noise reduction barrier unit and the infiltration of rainwater into the internal glass sound-absorbing cotton, thereby ensuring the good noise reduction effect of the removable anti-glare and noise reduction barrier unit; at the same time, due to the existence of the rain cover 18 and the large lateral equivalent shading angle of the removable anti-glare and noise reduction barrier unit, the removable anti-glare and noise reduction barrier unit also has an excellent anti-glare effect and can shield the glare generated by the train to the car road.

[0063] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A detachable anti-glare and noise reduction barrier unit with air permeability, characterized in that: The invention comprises a barrier unit body, in which a plurality of acoustic unit bearing parts arranged in sequence from left to right are arranged in the barrier unit body, the acoustic unit bearing parts are arranged along the height direction of the barrier unit body, a plurality of acoustic unit mounting positions are arranged on the acoustic unit bearing parts along the height direction, acoustic units are correspondingly mounted on the plurality of acoustic unit mounting positions, an inner connecting plate is commonly arranged on one end of the plurality of acoustic units, an outer connecting plate is commonly arranged on the other end of the plurality of acoustic units, and the inner connecting plate and the outer connecting plate are detachably connected to the barrier unit body; the acoustic unit comprises A sleeve with a hollow cylindrical structure is provided with a protruding annular boss on the inner wall of one end of the sleeve, a plurality of acoustic unit components are arranged and installed in sequence in the sleeve, a screw cover with a hole is threadedly connected to the other end of the sleeve, and an air passage is commonly provided on the screw cover with a hole, the plurality of acoustic unit components and the annular boss and passes through the sleeve axially; the plurality of acoustic unit components have the same structure and are all in the shape of a round cake and are provided with an air through hole in the center, a plurality of resonance cavities are evenly arranged on the acoustic unit component with the center of the air through hole as the center, and a connecting through hole connected to the air through hole is provided on the plurality of resonance cavities.

2. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 1 is characterized in that: A rubber pad is arranged between two adjacent acoustic unit components, and a round hole matching the air channel is arranged on the rubber pad.

3. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 1 is characterized in that: Vertical stiffening ribs are arranged between adjacent acoustic unit bearing parts. The vertical stiffening ribs are fixed in the barrier unit body and arranged along the height direction. Horizontal connecting strips arranged at intervals along the height direction are arranged on both sides of the vertical stiffening ribs. A fixed sliding groove is arranged along the axial direction and matched with the horizontal connecting strip.

4. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 3 is characterized in that: A plurality of connecting ear plates are arranged on the barrier unit body and at least one vertical stiffening rib along the height direction, and the inner connecting plates and the outer connecting plates are both connected to the connecting ear plates with bolts.

5. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 4 is characterized in that: The inner connecting plate and the outer connecting plate are both provided with mounting holes matched with the outer diameter of the sleeve, the number of the mounting holes is consistent with the number of the acoustic units, and a number of micro-perforations are also evenly distributed on the outer connecting plate.

6. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 1 is characterized in that: A plurality of rain shielding covers are arranged on the outer sides of the inner connecting plate and the outer connecting plate. The plurality of rain shielding covers are arranged at intervals up and down along the height direction of the barrier unit body. The plurality of rain shielding covers are arranged along the length direction of the barrier unit body.

7. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 6 is characterized in that: The rain shield plate comprises a rain shield plate which is tilted outward from top to bottom, and a plurality of triangular stiffening rib plates are arranged at intervals along the inner length direction of the rain shield plate, and the plurality of triangular stiffening rib plates are fixed on the outer side of the inner connecting plate or the outer connecting plate.

8. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 1 is characterized in that: A connecting protrusion is arranged on the top of the barrier unit body, a connecting groove matched with the connecting protrusion is arranged on the bottom of the barrier unit body, and anti-sliding blocks are arranged on the left and right sides of the barrier unit body.

9. The detachable anti-glare and noise reduction barrier unit with air permeability according to claim 1 is characterized in that: The acoustic unit installation position is also filled with glass sound-absorbing cotton to cover the acoustic unit.

10. A method for installing a detachable anti-glare and noise reduction barrier unit with air permeability according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Conduct noise detection on the actual work site, determine the proposed noise reduction frequency band based on the noise detection results, and then determine the construction location; S2. Pre-construct H-shaped steel columns according to the construction location and reserve installation space for the removable anti-glare and noise reduction barrier unit; S3. Assemble the detachable anti-glare and noise reduction barrier unit in the factory, place the assembled acoustic unit in the acoustic unit installation position, fill the acoustic unit installation position with glass sound-absorbing cotton, and then fix the inner connecting plate, outer connecting plate and rain cover plate; S4. Then, the detachable anti-glare and noise reduction barrier units assembled in the factory are transported to the construction site, and then the detachable anti-glare and noise reduction barrier units are inserted and fixed into the reserved installation space of the detachable anti-glare and noise reduction barrier units one by one.

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