High-performance sound barrier suitable for urban and urban rail transit

Abstract

The utility model relates to a high-performance sound barrier suitable for urban and urban rail transit, which comprises a hollow metal frame enclosed by a panel, a side plate, a top plate and a bottom plate, an outer tenon surface, a side section and a safe edge part of the top plate are embedded with an upper hook surface part and an upper plane part of the panel and a plane part of the panel, and an outer mortise surface of the bottom plate is embedded with a lower hook surface part of the panel. Damping partition pieces are arranged on the embedded portions of the face plate and the top plate and the embedded portions of the face plate and the bottom plate, and the hollow metal frames of any two sound barriers can be connected in a mortise and tenon mode through the tenon-shaped protruding parts of the top plate and the mortise-shaped protruding parts of the bottom plate. According to the utility model, the problems of structural vibration response and secondary structural noise are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound barriers, in particular to a high-performance sound barrier structure applicable to urban and suburban rail transit. Background Art

[0002] The maximum design speed of urban rail transit is 100 km / h, and the maximum design speed of suburban railway is 160 km / h. The design speeds of both types of rail transit are much lower than the maximum design speed of high-speed railway, which is 350 km / h. When running at full speed, the passing sound level of trains on urban rail transit and suburban railway is lower than that of high-speed railway, and the demand for the sound absorption and insulation performance of the sound barrier is lower, and the sound source composition is quite different from that of high-speed railway. However, when trains on urban rail transit and suburban railway pass through bridge lines, the structural vibration response is relatively large, and the secondary structure noise radiated by the vibration transmitted to the sound barrier is relatively strong. Therefore, it is necessary to focus on further reducing the vibration response of the sound barrier structure to reduce the design requirement of the additional structure noise generated by the installation of the sound barrier. In terms of material requirements, the "Technical Standard for Sound Barrier Structures" (GB / T 51335-2018) clearly states that rock wool and glass wool products cannot be used as the sound absorption materials for sound barriers. The applicable scope of this standard is urban roads, highways, and urban rail transit. Currently, the main sound absorption material for high-speed railway sound barriers is rock wool, which cannot be applied to urban rail transit and suburban railway. From the perspective of urban landscape requirements, metal sound barriers are more suitable for suburban railway and urban rail transit than non-metal sound barriers. However, the rigid connection between metal sound barriers and sound absorption materials such as cement-based or ceramic-based materials is more likely to cause structural vibration response and secondary structure noise, and the design of the reliability and stability of the structure faces greater challenges.

[0003] In summary, the acoustic performance, structural performance, and selection of sound absorption materials of sound barriers for urban rail transit and suburban railway cannot simply copy the existing experience of high-speed railway sound barriers. Therefore, it is necessary to study a metal sound barrier structure whose acoustic performance and structural performance meet the actual requirements of urban rail transit and suburban railway. Summary of the Invention

[0004] In view of the above problems of the prior art, the utility model fully considers the design requirements of sound barriers for urban rail transit and suburban railway, and provides a metal sound barrier based on cement-based or ceramic-based sound absorption plates, effectively solving the problems of structural vibration response and secondary structure noise.

[0005] A high-performance sound barrier applicable to urban and suburban rail transit of the utility model comprises a hollow metal frame surrounded by a group of symmetric panels, a group of symmetric side plates, a top plate and a bottom plate;

[0006] At least one group of symmetric tenon-shaped convex parts are formed by bending the top plate upwards through the top plate plane part, and a group of symmetric edge protection parts are formed by extending downwards from the edge of the top plate plane part on both sides of the top plate;

[0007] The upper end of the panel extends from the edge of the panel flat part towards the symmetry plane of the two panels to form a section of upper flat part, and then continues to extend upward and away from the symmetry plane of the two panels from the edge of the upper flat part to form an upper hook part;

[0008] The outer tenon surfaces of the tenon-shaped protrusions continuously arranged on both sides of the top plate, the edge segments of the top plate flat part, and the edge protection parts can be respectively fitted with the upper hook parts, the upper flat parts of the two panels, and at least a part of the panel flat parts;

[0009] On both sides of the bottom plate, at least one set of symmetric mortise-shaped protrusions is formed by bending upward from the edge of the bottom plate flat part;

[0010] The lower end of the panel extends from the edge of the panel flat part towards the symmetry plane of the two panels to form a section of lower flat part, and then continues to extend upward and away from the symmetry plane of the two panels from the edge of the lower flat part to form a lower hook part;

[0011] The outer mortise surfaces of the mortise-shaped protrusions on both sides of the bottom plate can be respectively fitted with the lower hook parts of the two panels;

[0012] Damping partition members are provided at the fitting parts of the panel with the top plate and the bottom plate, both at the fitting ends and the intermediate bending parts;

[0013] The hollow metal frames of any two sound barriers can form a mortise-tenon connection through the tenon-shaped protrusions of the top plate and the mortise-shaped protrusions of the bottom plate, so as to realize the longitudinal superposition between the sound barrier unit structures.

[0014] As a preferred solution, at the fitting parts of the panel with the top plate and the bottom plate, the free ends of the panel, the top plate and the bottom plate are in the shape of enlarged ends, and the planes or bending parts that are mutually fitted with the ends are arc-shaped, and the arc shape can form a semi-arc enclosure for the ends.

[0015] As a preferred solution, the angle design between the outer tenon surface of the top plate and the upper hook part of the panel, and / or the angle design between the outer mortise surface of the bottom plate and the lower hook part of the panel is carried out in such a way that there is a reverse angle deviation between the mutually fitted surfaces. The angle deviation Δθ is preferably 1 to 2°.

[0016] As a preferred solution, damping partition members are further provided at the parts above the top plate that are flat, and / or at the parts below the bottom plate that are flat, and at the parts below the panel that are flat.

[0017] As a preferred solution, at least one set of positioning parts extending vertically downward from the top plate flat part are further provided on the top plate for limiting the sound absorption board.

[0018] As a preferred solution, one or more sound absorption boards are provided between the side plates.

[0019] As a preferred solution, damping partition members are also provided in the contact gaps between the sound absorption board and the front panel, side panels, top panel, and bottom panel respectively, as well as in the contact gaps between adjacent sound absorption boards.

[0020] As a preferred solution, the damping partition members of the present utility model include arc-shaped partition types and strip-tubular partition types; the arc-shaped partition types are characterized by an arc-shaped middle part and edge parts that decrease at at least one end; the strip-tubular partition types are characterized by a flat strip section and at least one end circular tube section provided on the flat strip section; the arc-shaped partition types are provided at the fitting parts between the front panel and the top panel and the bottom panel respectively; the strip-tubular partition types are provided at at least one of the following positions: i. the flat part above the top panel, ii. the flat part below the bottom panel and the flat part below the front panel, iii. the contact gaps between the sound absorption board and the front panel, side panels, top panel, and bottom panel respectively, iv. the contact gaps between adjacent sound absorption boards.

[0021] As a further preferred solution, the arc-shaped partition type with the extension direction of the edge part greater than 0° from the tangent line at the arc end point position of the arc-shaped middle part is located at the fitting part between the front panel and the top panel respectively.

[0022] As a further preferred solution, the arc-shaped partition type with a tubular end is located at the fitting part where the end of the lower hook face part of the front panel is located.

[0023] As a further preferred solution, the arc-shaped partition type with the extension direction of at least one edge part being 0° from the tangent line at the arc end point position of the arc-shaped middle part is located at the fitting part where the end of the outer mortise face of the bottom panel is located.

[0024] As a further preferred solution, the strip-tubular partition type with only an end circular tube section is located at the mortise and tenon connection part.

[0025] As a further preferred solution, the strip-tubular partition type with a middle circular tube section is located at the docking part between the hollow metal frame and the sound absorption board and / or the docking part between the sound absorption boards; preferably, two strip-tubular partition types are provided at the docking part in a relative manner, and the middle circular tube sections of the two relatively arranged strip-tubular partition types are staggered, and the size of the end circular tube section is reduced to 1 / 2 - 3 / 4 of the middle circular tube section.

[0026] As a preferred solution, the damping partition members of the present utility model are made of rubber material, preferably ethylene propylene diene monomer rubber.

[0027] As a preferred solution, the front panel plane part of the front panel of the present utility model located on the side facing the sound source is provided with a perforation array or wavy pattern.

[0028] As a preferred solution, the sound absorption board adopts cement-based and / or ceramic-based sound absorption materials.

[0029] Compared with the prior art, the utility model has at least the following beneficial effects:

[0030] The sound barrier provided by the utility model satisfies the coordinated unity of structural rigidity and elasticity, can effectively eliminate the negative impact of structural vibration response in the application of urban rail transit and suburban railway, and inhibits the formation of secondary structure noise.

[0031] The plate bodies of the utility model are designed with an independent integrated structure. The structure is simple. Through the mortise and tenon connection structure, problems such as the superposition of unit structures, stress absorption and release, the limit of the sound absorption board, the reliability of the support ability and elastic coordination are solved synchronously, and the common improvement of diversified effects is realized.

[0032] Through the design of damping partition members and their further optimized structural forms of different categories, the utility model provides structural design schemes that can be optimized for different parts, meets the individualized difference requirements brought by the structural characteristics of different parts, further enhances the elastic reliability, and avoids the influence of different parts on the sound absorption and insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic diagram of the overall structure in the front view direction of a specific embodiment of the utility model.

[0035] Figure 2 It is Figure 1 The sectional view of A-A in

[0036] Figure 3 It is Figure 1 The sectional view of B-B in

[0037] Figure 4 It is for the utility model Figure 1 The structural schematic diagram of the panel in

[0038] Figure 5 It is for the utility model Figure 1 The structural schematic diagram of the top plate in

[0039] Figure 6 It is for the utility model Figure 1 The structural schematic diagram of the bottom plate in

[0040] Figure 7 It is for the utility model Figure 1Exploded view of the fitting part between the middle top plate and the panel.

[0041] Figure 8 This is the present utility model Figure 1 Exploded view of the fitting part between the middle bottom plate and the panel.

[0042] Figure 9 This is the present utility model Figure 1 Partial structural schematic diagram after the middle top plate and the panel are fitted together.

[0043] Figure 10 This is the present utility model Figure 1 Partial structural schematic diagram after the middle bottom plate and the panel are fitted together.

[0044] Figure 11 This is the present utility model Figure 1 Structural schematic diagram of the damping partition member provided at the flat part above the top plate.

[0045] Figure 12 This is the present utility model Figure 1 Partial structural schematic diagram after one side plate and the panel are enclosed.

[0046] Figure 13 This is the present utility model Figure 1 Partial structural schematic diagram after the other side plate and the panel are enclosed.

[0047] Figure 14 This is the present utility model Figure 2 Partial structural diagram of the connecting part between adjacent sound absorption plates.

[0048] Figure 15 Structural schematic diagrams of several specific arc-shaped partition type damping partition members of the present utility model.

[0049] Figure 16 Structural schematic diagrams of several specific strip-tubular partition type damping partition members of the present utility model.

[0050] Figure 17 Comparison result of the sound insulation amount of the sound barrier unit board of the present utility model in the low frequency band compared with the general type.

[0051] Figure 18 Comparison result of the passing sound level of the sound barrier unit board of the present utility model in the low frequency band compared with the general type. Specific embodiments

[0052] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below in conjunction with the accompanying drawings. Embodiments of the present utility model are given, but this does not limit the scope of the present utility model.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0054] The sound barrier of the present utility model, as a unit structure, such as Figures 1 - 3 , includes a hollow metal frame enclosed by a set of symmetric panels 100, a set of symmetric side plates 200, a top plate 300, and a bottom plate 400;

[0055] See Figure 5 , the top plate 300 is bent upward through the top plate flat portion 310 to form at least a set of symmetric tenon-like protrusion portions 320, and both sides of the top plate 300 form a set of symmetric edge protection portions 330 by extending downward from the edge of the top plate flat portion 310;

[0056] See Figure 4 , the upper end of the panel 100 forms an upper flat portion 120 by extending from the edge of the panel flat portion 110 toward the symmetric plane of the two panels 100, and continues to extend upward and away from the symmetric plane of the two panels 100 from the edge of the upper flat portion 120 to form an upper hook face portion 130;

[0057] See Figure 5 , 7 , 9, 11, the outer tenon surfaces 3201 of the tenon-like protrusion portions 320 continuously provided on both sides of the top plate 300, the edge segments 3101 of the top plate flat portion 310, and the edge protection portions 330 can be respectively fitted with the upper hook face portions 130, the upper flat portions 120, and at least a part of the panel flat portion 110 of the two panels 100;

[0058] See Figure 6 , both sides of the bottom plate 400 are bent upward through the bottom plate flat portion 410 to form at least a set of symmetric mortise-like protrusion portions 420;

[0059] See Figure 4 , the lower end of the panel 100 forms a lower flat portion 140 by extending from the edge of the panel flat portion 110 toward the symmetric plane of the two panels 100, and continues to extend upward and away from the symmetric plane of the two panels 100 from the edge of the lower flat portion 140 to form a lower hook face portion 150;

[0060] See Figure 6 , 8 , 10, the outer mortise surfaces 4201 of the mortise-like protrusion portions 420 on both sides of the bottom plate 400 can be respectively fitted with the lower hook face portions 150 of the two panels 100;

[0061] See Figure 7 、 8 At the fitting parts of the panel 100 with the top plate 300 and the bottom plate 400 respectively, damping partition members 500 are provided at both the fitting ends and the intermediate bending parts;

[0062] The hollow metal frames of any two sound barriers can form a mortise-tenon connection through the tenon-shaped convex part 320 of the top plate 300 and the mortise-shaped convex part 420 of the bottom plate 400, so as to realize the longitudinal superposition between the sound barrier unit structures.

[0063] Through the above-mentioned independent integrated structure designs of the panel 100, the top plate 300, and the bottom plate 400, the present utility model fully satisfies the coordinated unity of the structural rigidity and elasticity after the enclosure of the hollow metal frame. The mortise-tenon connection between the tenon-shaped convex part 320 and the mortise-shaped convex part 420 can not only realize the superposition of the unit structures, but also the convex structure design can serve as a buffer medium for stress absorption and release, reducing the stress damage caused by the vibration response to the metal plate. The mortise-shaped convex part 420 also brings a limiting space for the sound absorption plate 600 by the bottom plate 400, simplifies the structural design of the bottom plate 400, and ensures the limiting stability of the sound absorption plate 600. The fitting parts of the panel 100 with the top plate 300 and the bottom plate 400 respectively are also fully considered by using the mortise-tenon connection structure. The outer tenon surface 3201 and the outer mortise surface 4201 of the mortise-tenon connection are used to form a hook-type connection, increasing the fitting stability and taking into account the fitting elasticity. At the same time, further combined with the stress conditions of the top plate 300 and the bottom plate 400, on the one hand, the up-and-down fitting methods are fully adjusted. The top plate 300 is fitted with the panel 100 by means of self-outside fitting, with more bends at the fitting part, high reliability and good protection. The bottom plate 400 is fitted with the panel 100 by means of self-inside fitting, with fewer bends and higher elasticity at the fitting part. On the other hand, damping partition members 500 are further added at the fitting parts, so that the whole hollow metal frame realizes the coordinated unity of support, protection, elasticity and stress, effectively eliminates the negative influence of the structural vibration response and the secondary structure noise, and improves the reliability and stability.

[0064] As some further optimized designs, see Figure 5 、 6 、9, 10, at the fitting parts of the panel 100 with the top plate 300 and the bottom plate 400 respectively, the free ends of the panel 100, the top plate 300 and the bottom plate 400 are in the shape of a swollen end 700, and the plane or bending part that fits with the end 700 is in an arc shape 800. The arc shape 800 can form a semi-arc enclosure for the end 700, further improving the fitting stability of the fitting part at the free end, and improving the stability of the setting of the damping partition member 500 at these parts.

[0065] As some further optimized designs, the angle design between the outer tenon surface 3201 of the top plate 300 and the upper hook surface portion 130 of the panel 100, and / or the angle design between the outer mortise surface 4201 of the bottom plate 400 and the lower hook surface portion 150 of the panel 100 are carried out in such a way that there is an inverse angular deviation between the mutually engaging surfaces. Specifically, taking the outer tenon surface 3201 and the upper hook surface portion 130 as an example, when the fitting angle is θ, the angle of the upper hook surface portion 130 is designed as θ - Δθ, and the angle of the outer tenon surface 3201 is designed as θ + Δθ. Generally, Δθ is taken as 1 to 2°, which can generate local biting force when the two are mutually engaged, improving the bonding tightness and structural stability.

[0066] As some further optimized designs, refer to Figure 11 , a damping partition member 500 is further provided at the flat part above the top plate 300 and / or the flat part below the bottom plate 400 and the flat part below the panel 100 (lower flat surface part 140), ensuring that when the sound barrier unit structures are stacked, the mortise and tenon connection parts also avoid rigid contact, improving the elasticity between the unit structures and eliminating stress. This provides a guarantee for the large-area array use of the unit structure.

[0067] As some further optimized designs, refer to Figure 5 、 9 , at least one group of positioning parts 340 extending vertically downward from the top plate flat surface part 310 are further provided on the top plate 300, which can cooperate with the limiting space formed by the mortise-shaped convex parts 420 of the bottom plate 400 to stably limit the sound absorption board 600.

[0068] As some further optimized designs, refer to Figure 2 、 14 , the sound absorption board 600 between the side plates 200 of the present utility model can be set to one or more. The above-mentioned enclosure design method of the hollow metal frame of the present utility model can achieve the design universality of the large-size panel 100. In order to reduce the design cost of the large-size sound absorption board 600 and other requirements, multiple sound absorption boards 600 can be placed in one sound barrier. Since the limitation of the sound absorption board 600 is mainly borne by the top plate 300 and / or the bottom plate 400, the structure of the side plate 200 of the present utility model is not particularly limited, as long as it can form an enclosure structure, which simplifies the design requirements and costs.

[0069] As some further optimized designs, refer to Figure 2 、 9, 10, 12, 13, 14, damping partition members 500 are also provided in the contact gaps between the sound-absorbing panel 600 and the front panel 100, side panels 200, top panel 300, bottom panel 400 respectively, and in the contact gaps between adjacent sound-absorbing panels 600, which can relieve rigid contact, avoid damage to the structure of the sound-absorbing panel 600, and ensure the sound absorption and insulation ability (avoid sound leakage) and other functions at the same time.

[0070] As some further optimized designs, the damping partition members 500 of the present utility model are designed into different structural forms to fully adapt to and meet the connection requirements of different parts, including arc-shaped partition type 510 and strip-tubular partition type 520.

[0071] See Figure 7 , 8 , 15, the arc-shaped partition type 510 is characterized by an arc-shaped middle part 511 and edge parts 512 that decrease at at least one end; the extending direction of the edge parts 512 and the included angle between the two edge parts 512 are the same as the extending direction and included angle of the two adjacent faces of the part where they are located, and the extending direction of the edge parts 512 forms an angle of 0 to 90° with the tangent line at the arc end point position of the arc-shaped middle part 511. The case where the angle is greater than 0° (such as Figure 15 5101, 5102, 5103 in Figure 15 ) is applicable to the structural part where the arc end point position can expand and protrude, and 90° is preferred. The case where the angle is 0° (such as Figure 15In <5105>, the tubular end 513 can play an extrusion and fixing role on the free ends of the panel 100, the top plate 300, and / or the bottom plate 400. Since the connecting section between the tubular end 513 and the arc-shaped middle part 511 can be regarded as an integrated setting of two mutually cooperating side parts 512, this connecting section can be embodied as a non-decreasing equal-thickness setting. The arc-shaped partition type 510 is more suitable for the fitting parts where the panel 100 is respectively fitted with the top plate 300 and the bottom plate 400, and has good structural adaptability and fitting stability. The arc-shaped partition type 510 with the extension direction of the side part 512 greater than 0° from the tangent line at the arc end point position of the arc-shaped middle part 511 is preferably located at the fitting part where the panel 100 is respectively fitted with the top plate 300, because the fitting part between the panel 100 and the top plate 300 has more bends but good stability; the arc-shaped partition type 510 with the tubular end 513 is preferably located at the fitting part where the end of the lower hook surface 150 of the panel 100 is located. The arc-shaped partition type 510 with the extension direction of one side part 512 being 0° from the tangent line at the arc end point position of the arc-shaped middle part 511 is preferably located at the fitting part where the end of the outer mortise surface 4201 of the bottom plate 400 is located, because the fitting part between the panel 100 and the bottom plate 400 has fewer bends but higher elasticity, which is beneficial to mutual cooperation to improve stability and further eliminate vibration response.

[0072] See Figures 9 - 14 , 16. The strip-shaped tubular partition type 520 is characterized by a flat strip section 521 and at least one end circular tube section 522 provided on the flat strip section 521; the width of the flat strip section 521 is the same as the face width of the part where it is located; whether to provide the end circular tube section 522 at the end of the flat strip section 521 can be determined by whether the end of the part where it is located has a face that restrains it (such as Figure 16 one end of the part where <5201> is located does not have a face that restrains it, so the end circular tube section 522 is not designed at one end of <5201>); the strip-shaped tubular partition type 520 with only the end circular tube section 522 (such as Figure 16 <5201>, <5202>, <5203> in) can be applicable to the mortise and tenon connection parts, that is, the flat parts above the top plate 300 and / or the flat parts below the bottom plate 400 and the flat parts below the panel 100. At least one middle circular tube section 523 can be further provided in the middle of the flat strip section 521 (such as Figure 16 <5204>, <5205>, <5206> in). The strip-shaped tubular partition type 520 with the middle circular tube section 523 can be more suitable for the docking parts between the hollow metal frame and the sound-absorbing panel 600 and the docking parts between the sound-absorbing panels 600, which is beneficial to rigidly protect the sound-absorbing panel 600 and improve the sound insulation effect. Two strip-shaped tubular partition types 520 can be further provided in a relative manner at the docking part, and the middle circular tube sections 523 of the two relatively arranged strip-shaped tubular partition types 520 are staggered ([[]] Figure 14), and the size of the end circular tube section 522 is reduced to 1 / 2 to 3 / 4 of the middle circular tube section 523 to meet the space limitation of size.

[0073] As some further optimization designs, the damping partition member 500 of the present invention can be made of rubber material, preferably EPDM rubber.

[0074] As some further optimization designs, the panel plane portion 110 of the panel 100 of the present invention located on the side facing the sound source can also be set in various forms, including but not limited to opening a perforated array ( Figure 1 ), setting wave patterns, etc. to enhance the sound absorption capacity on the side facing the sound source.

[0075] As some further optimization designs, the sound absorbing board 600 uses cement-based and / or ceramic-based sound absorbing materials, which have high strength and good stability in the structure of the above-mentioned hollow metal frame, and are not prone to structural damage. As an example, the raw materials of the sound absorbing board 600 are produced by lightweight aggregate (such as ceramsite, volcanic rock particles, sandstone particles, etc.), cementitious materials, and water. The particle size of the lightweight aggregate is 0.6 to 4.75 mm, and the cementitious materials are composed of cement and admixtures. The admixtures are composed of silica fume, fly ash, fiber and / or other modified materials. The admixtures can improve the mixing state of the slurry during the production process and improve the flexural strength and freeze-thaw resistance of the formed board. The weight ratio of each component is lightweight aggregate: cementitious material: water = 3 to 5: 1: 0.4 to 0.65; the thickness of the sound absorbing material is 30 mm to 50 mm.

[0076] As a more specific example, the utility model provides a specific sound barrier unit plate structure, the sound barrier unit plate height 500mm, length 1960mm, thickness 140mm, sound absorption material thickness 40mm, and laboratory sound insulation performance test, as well as the secondary structure noise and maximum deformation of the unit plate when the train passes after on-site installation and operation, at the same time, the sound barrier of the general structure type of urban rail transit and urban rail under the same test conditions was tested and compared, the specific results are shown in Figure 17 , Figure 18 .

[0077] Depend on Figure 17 It can be seen that the low-frequency sound insulation of the sound barrier unit board of the utility model is significantly improved compared with the general type, and the sound insulation of the center frequency of 100Hz to 200Hz is increased by 1.7 to 7.7dB. The weighted sound insulation of the sound barrier unit board of the utility model in the laboratory test is 33dB, and the weighted sound insulation of the general type sound barrier unit board is 30dB.

[0078] Figure 18The sound level measurement point for the passing train is located 25 m from the center line of the outer rail and 3.5 m above the rail surface. It can be seen from the figure that the noise below 200 Hz of the sound barrier unit board of the present utility model is significantly lower than that of the general type of sound barrier, indicating that the sound barrier unit board of the present utility model is a structure with enhanced damping and has a good effect on suppressing low-frequency noise.

[0079] When the train passes, the maximum deformation of the sound barrier unit board of the present utility model is 0.17 mm, while the maximum deformation of the general type of sound barrier unit board is 0.2 mm. The structural type of the sound barrier unit board of the present utility model has an obvious effect of reducing the deformation of the unit board.

[0080] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and deformations to the above embodiments within the scope of the present utility model. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. A high-performance sound barrier suitable for urban and urban rail transit, characterized in that: It comprises a hollow metal frame formed by a group of symmetrical panels (100), a group of symmetrical side panels (200), a top panel (300) and a bottom panel (400); The top plate (300) is bent upwards through the top plate plane portion (310) to form at least one group of symmetrical tenon-shaped protrusions (320), and two sides of the top plate (300) extend downwards from the edge of the top plate plane portion (310) to form a group of symmetrical edge protection portions (330); The upper end of the panel (100) extends from the edge of the panel plane portion (110) toward the symmetric plane of the two panels (100) to form an upper plane portion (120), and continues to extend from the edge of the upper plane portion (120) toward the upper side and away from the symmetric plane of the two panels (100) to form an upper hook surface portion (130); The outer tenon surfaces (3201) of the tenon-shaped protrusions (320) continuously arranged on both sides of the top plate (300), the edge sections (3101) of the top plate plane portion (310), and the edge protection portions (330) can respectively fit with at least a portion of the upper hook surface portions (130), the upper plane portion (120), and the panel plane portion (110) of the two panels (100); The two sides of the bottom plate (400) are bent upward from the edge of the bottom plate plane portion (410) to form at least one group of symmetrical mortise-shaped protrusions (420); The lower end of the panel (100) extends from the edge of the panel plane portion (110) toward the symmetric plane of the two panels (100) to form a lower plane portion (140), and continues to extend from the edge of the lower plane portion (140) toward the upper side and away from the symmetric plane of the two panels (100) to form a lower hook surface portion (150); The outer mortise surfaces (4201) of the mortise-shaped protrusions (420) on both sides of the bottom plate (400) can be respectively engaged with the lower hook surface portions (150) of the two panels (100); Damping partitions (500) are provided at the engaging ends and the middle bending parts of the panel (100) and the top plate (300) and the bottom plate (400); The hollow metal frames of any two sound barriers can form a mortise and tenon connection through the tenon-shaped protrusion (320) of the top plate (300) and the mortise-shaped protrusion (420) of the bottom plate (400), thereby realizing the longitudinal superposition between the sound barrier unit structures.

2. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: At the engaging portions of the panel (100) with the top plate (300) and the bottom plate (400), the free ends of the panel (100), the top plate (300) and the bottom plate (400) are in the form of enlarged end heads (700), and the plane or the bent portion engaging with the end heads (700) is in the form of an arc (800), and the arc (800) can form a semi-arc surrounding the end heads (700).

3. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: The angle design between the outer tenon surface (3201) of the top plate (300) and the upper hook surface portion (130) of the panel (100), and / or the angle design between the outer mortise surface (4201) of the bottom plate (400) and the lower hook surface portion (150) of the panel (100) is carried out in a manner that there is a reverse angle deviation between the mutually interlocking surfaces.

4. The high-performance sound barrier suitable for urban and urban rail transit according to claim 3 is characterized in that: The angle deviation Δθ is 1 to 2°.

5. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: The planar portion above the top plate (300) and / or the planar portion below the bottom plate (400) and the planar portion below the panel (100) are further provided with a damping partition (500).

6. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: The top plate (300) is also provided with at least one group of positioning portions (340) extending vertically downward from the top plate plane portion (310) and used to limit the position of the sound absorbing plate (600).

7. The high-performance sound barrier suitable for urban and urban rail transit according to claim 6 is characterized in that: One or more sound absorbing panels (600) are provided between the side panels (200).

8. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: Damping partitions (500) are also provided in the contact gaps between the sound absorbing plate (600) and the panel (100), the side plate (200), the top plate (300), and the bottom plate (400), as well as in the contact gaps between adjacent sound absorbing plates (600).

9. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: The damping partition (500) comprises an arc-shaped partition (510) and a strip-tube partition (520); the arc-shaped partition (510) has an arc-shaped middle portion (511) and at least one end decreasing edge portion (512) as structural features; the strip-tube partition (520) has a flat strip segment (521) and at least one end circular tube segment (522) arranged on the flat strip segment (521) as structural features; the arc-shaped partition (510) is arranged on the panel (100) and is respectively connected to the top plate (300) and the bottom plate ( The strip-shaped partition (520) is arranged at the fitting position of the top plate (300); the strip-shaped partition (520) is arranged at at least one of the following positions: i. a flat position above the top plate (300), ii. a flat position below the bottom plate (400) and a flat position below the panel (100), iii. the contact gaps between the sound absorbing plate (600) and the panel (100), the side plate (200), the top plate (300) and the bottom plate (400), respectively; iv. the contact gaps between adjacent sound absorbing plates (600).

10. The high-performance sound barrier suitable for urban and urban rail transit according to claim 7, characterized in that: The damping partition (500) is arranged at a position that satisfies at least one of the following modes according to structural classification: i. The arc-shaped partition (510) whose tangent line between the extending direction of the edge (512) and the arc end point position of the arc-shaped middle portion (511) is greater than 0° is located at the engaging portion of the panel (100) and the top plate (300); ii. The arc-shaped partition class (510) having a tubular end portion (513) is located at the fitting portion where the end portion of the lower hook surface portion (150) of the panel (100) is located; iii. The arc-shaped partition (510) whose extension direction of at least one edge (512) and the tangent of the arc end point position of the arc-shaped middle portion (511) is 0° is located at the fitting portion where the end of the outer mortise surface (4201) of the bottom plate (400) is located; iv. A tubular partition (520) having only an end circular tube segment (522) located at the mortise and tenon connection portion; v. The strip-shaped tubular partition (520) having a middle circular tube section (523) is located at the joint between the hollow metal frame and the sound absorbing plate (600) and / or the joint between the sound absorbing plates (600); two strip-shaped tubular partitions (520) are arranged in an opposing manner at the joint, the middle circular tube sections (523) of the two oppositely arranged strip-shaped tubular partitions (520) are arranged alternately, and the size of the end circular tube section (522) is reduced to 1 / 2 to 3 / 4 of the middle circular tube section (523).

11. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: The damping partition (500) is made of rubber; The sound absorbing plate (600) is made of cement-based or ceramic-based sound absorbing material.

12. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1, characterized in that: The damping partition (500) is made of EPDM rubber.

13. The high-performance sound barrier suitable for urban and urban rail transit according to claim 1 is characterized in that: The panel plane portion (110) of the panel (100) located on the side facing the sound source is configured to have a perforated array or a wave pattern.

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