Expressway sound insulation barrier with buffer structure and system

Abstract

The invention relates to the field of sound insulation barriers, and discloses an expressway sound insulation barrier with a buffer structure, which comprises a positioning mechanism, a top fixing piece, a sound insulation unit and a buffer plate, the buffer plates are mounted at the upper and lower ends of the sound insulation unit; the top fixing piece forms top limiting on the sound insulation unit; the positioning mechanisms are mounted at the left end and the right end of the sound insulation unit, and each positioning mechanism comprises a supporting assembly and a self-adjusting assembly; the supporting assembly is used for providing basic support for the sound insulation barrier; the self-adjusting assembly comprises a fixed frame and a movable frame, and the movable frame is installed on the fixed frame in a sliding mode. The self-adjusting assembly suppresses horizontal vibration of the sound insulation unit through the movable frame. By arranging the self-adjusting assembly in the positioning mechanism, when the sound insulation unit is subjected to horizontal force such as aerodynamic load of a high-speed vehicle or vibration transmission, vibration energy is converted into elastic deformation energy, rigid collision is avoided, and buffering in the horizontal direction is achieved.

Description

Technical Field

[0001] The present invention relates to the field of sound insulation barriers, and particularly to a highway sound insulation barrier and system with a buffer structure. Background Art

[0002] In the field of highway traffic noise control, the stability and maintenance convenience of sound insulation barriers have always been the key concerns of the industry.

[0003] Traditional highway sound insulation barriers generally use a rigid connection method to fix the mounting frame and the support structure. This structural form has exposed various technical defects during long-term service.

[0004] When a strong wind load acts on the sound insulation barrier, the rigid connection cannot dissipate and absorb the vibration energy through structural deformation, resulting in excessive horizontal displacement and vibration response of the mounting frame. This continuous dynamic load will cause the connecting components to bear high-frequency impact loads, thereby triggering safety problems such as connection loosening, structural deformation, and even component detachment. At the same time, the fully rigid fixed connection adopted by the existing sound insulation barriers results in an inefficient characteristic of point-by-point decoupling during the disassembly and assembly process. More critically, the design of the fully rigid fixed connection leads to a high degree of coupling of each component, and it is extremely easy to cause chain damage under long-term vibration.

[0005] Therefore, a highway sound insulation barrier with a buffer structure is proposed to solve the above problems. Summary of the Invention

[0006] The main purpose of the present invention is to solve the technical problems that the traditional rigid connection structure is easy to loosen and inconvenient to disassemble. A highway sound insulation barrier with a buffer structure includes: A positioning mechanism, a top fixing member, a sound insulation unit, and a buffer plate; the buffer plate is installed at the upper and lower ends of the sound insulation unit; the top fixing member forms a top limit for the sound insulation unit; the positioning mechanism is installed at the left and right ends of the sound insulation unit, and the positioning mechanism includes a support assembly and a self-adjusting assembly; the support assembly is used to provide the basic support for the sound insulation barrier; the self-adjusting assembly includes a fixed frame and a movable frame, and the movable frame is slidably installed on the fixed frame; the self-adjusting assembly suppresses the horizontal vibration of the sound insulation unit through the movable frame.

[0007] The present invention has the following beneficial effects: By setting the self-adjusting assembly in the positioning mechanism of the present invention, when the sound insulation unit is subjected to a horizontal force, such as the aerodynamic load of a high-speed vehicle or vibration transmission, the movable frame of the self-adjusting assembly horizontally slides along the first groove of the cross beam through the first positioning rib, and at the same time moves along the reserved groove of the fixed frame; the elastic member is compressed or stretched due to the sliding of the movable frame, converting the vibration energy into elastic deformation energy, avoiding rigid collision, and realizing horizontal buffering. Brief Description of the Drawings

[0008] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the sound insulation unit of the present invention; Figure 3 is the sectional structural schematic diagram of the sound insulation unit of the present invention; Figure 4 is the exploded structural schematic diagram of the mounting bracket of the present invention; Figure 5 is the structural schematic diagram of the buffer plate of the present invention; Figure 6 is the structural schematic diagram of the positioning mechanism of the present invention; Figure 7 is the exploded structural schematic diagram of the self-adjusting component of the present invention; Figure 8 is the structural schematic diagram of the support component of the present invention; Figure 9 of the present invention Figure 8 is the enlarged structural schematic diagram at position A in; Figure 10 is the structural schematic diagram of the column of the present invention.

[0009] In the figure: 1, positioning mechanism; 11, support component; 111, base; 112, column; 1121, mounting hole; 113, mounting component; 1131, nut post; 1132, elastic member; 1133, mounting bolt; 12, self-adjusting component; 121, fixing frame; 1211, reserved groove; 1212, first communication hole; 122, movable frame; 1221, first positioning rib; 1222, second communication hole; 2, top fixing member; 3, sound insulation unit; 31, mounting bracket; 311, cross beam; 3111, first groove; 312, corner code; 313, side column; 3131, second groove; 32, sound insulation board; 321, transverse reinforcing rib; 33, sealing ring; 4, buffer plate; 41, second positioning rib. Detailed implementation manners

[0010] In the description, claims, and above-mentioned drawings of the present invention, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order different from that illustrated or described here. In addition, the term "comprising" or "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0011] For ease of understanding, the specific process of the embodiments of the present invention will be described below. Please refer to Figure 1 , the first embodiment of the highway sound insulation barrier with a buffer structure in the embodiments of the present invention includes: Embodiment 1 As Figures 1 to 10 shown, an embodiment provided by the present invention: a highway sound insulation barrier with a buffer structure, which includes a positioning mechanism 1, a top fixing member 2, a sound insulation unit 3, and a buffer plate 4. Each component cooperates to achieve the functions of sound insulation, vibration buffering, and structural strengthening. The specific structure is as follows: As Figure 6 shown, the positioning mechanism 1 includes a support component 11 and a self-adjusting component 12. The support component 11 is used to provide basic support, and the self-adjusting component 12 is used to suppress the horizontal vibration of the sound insulation unit 3.

[0012] As Figure 7 and Figure 10 shown, the self-adjusting component 12 includes a fixed frame 121 and a movable frame 122. The fixed frame 121 is fixedly connected to the column 112 through the mounting component 113, and a reserved groove 1211 with an elliptical cross-section and a first communication hole 1212 are formed on its surface; the movable frame 122 is slidably mounted on the fixed frame 121 through the mounting component 113, and a first positioning rib 1221 and a second communication hole 1222 are provided on its surface. The first positioning rib 1221 is slidably matched with the first groove 3111 of the sound insulation unit 3, and the second communication hole 1222 is coaxial with the first communication hole 1212 and has a matching aperture.

[0013] As Figure 8 shown, the support component 11 includes a base 111 and a column 112. The base 111 is fixed to the ground through embedded bolts, and the column 112 is vertically and fixedly installed on the base 111 to form a vertical support structure; an installation hole 1121 is formed on the surface of the column 112 for embedding the mounting component 113.

[0014] As Figure 9The mounting assembly 113 includes a nut column 1131, an elastic member 1132 of a spiral spring structure, and a mounting bolt 1133. The elastic member 1132 is sleeved on the nut column 1131, with one end abutting against the column 112 and the other end abutting against the movable frame 122, and absorbs horizontal vibration energy through elastic deformation; the end of the nut column 1131 away from the column 112 passes through the first connecting hole 1212 and the second connecting hole 1222 in sequence, and the fixed frame 121 is fixed by the mounting bolt 1133, so that the movable frame 122 and the fixed frame 121 can be quickly disassembled and assembled, and the movable frame 122 can move relative to the fixed frame 121 under the action of the elastic member 1132.

[0015] like Figures 2 - 4 The sound insulation unit 3 includes a mounting frame 31 and a sound insulation board 32. The mounting frame 31 is formed by a cross beam 311 and a side column 313 fixedly connected by an angle bracket 312 to form a rectangular frame.

[0016] A first groove 3111 is formed on the surface of the cross beam 311 , and the first groove 3111 matches with the first positioning protrusion 1221 of the movable frame 122 . A second groove 3131 is formed on the surface of the side column 313 , and the second groove 3131 matches with the second positioning protrusion 41 of the buffer plate 4 .

[0017] The sound insulation board 32 is embedded in the frame of the mounting frame 31, and a sealing ring 33 is provided on its edge. The sealing ring 33 fits tightly with the inner side of the cross beam 311 and the side column 313; a plurality of transverse reinforcing ribs 321 are embedded horizontally and equidistantly inside the sound insulation board 32. The transverse reinforcing ribs 321 are arranged parallel to the buffer plates 4 at the upper and lower ends of the sound insulation unit 3 and are not in direct contact with each other, so as to enhance the overall structural strength of the sound insulation board 32 and reduce the risk of deformation and damage under long-term vibration loads.

[0018] The top fixing member 2 is connected to the top of the column 112 by bolts, forming a top limit for the sound insulation unit 3 and enhancing the wind resistance stability of the overall structure.

[0019] like Figure 5 The buffer plate 4 is installed at the upper and lower ends of the sound insulation unit 3, and is made of EPDM rubber with a Shore hardness of 30-50 and a thickness of 5 to 15 mm; a second positioning convex strip 41 is provided on the surface of the buffer plate 4, which is clamped with the second groove 3131 of the side column 313 through the second positioning convex strip 41 to absorb the vibration energy in the vertical direction and improve the vertical positioning accuracy.

[0020] When the sound insulation unit 3 is subjected to a horizontal force, such as the aerodynamic load of a high-speed vehicle or vibration transmission, the vibration of the sound insulation unit 3 is transmitted to the movable frame 122. The movable frame 122 slides horizontally along the first groove 3111 of the cross beam 311 through the first positioning rib 1221, and the displacement is ≤ 50 mm. At the same time, it moves along the reserved groove 1211 of the fixed frame 121. The elastic member 1132 is compressed or stretched due to the sliding of the movable frame 122, converting the vibration energy into elastic deformation energy, avoiding rigid collision, and realizing buffering in the horizontal direction.

[0021] The buffer plate 4 absorbs the vibration energy in the vertical direction through its own elastic deformation, such as road surface bumps or vehicle air flow impacts. At the same time, the transverse reinforcing ribs 321 enhance the anti-deformation ability of the sound insulation board 32 through rigid support, reducing the damage caused by vibration.

[0022] The sealing ring 33 at the edge of the sound insulation board 32 seals the gap between the mounting frame 31 and the sound insulation board 32, improving the sound insulation tightness. The rigid connection between the top fixing member 2 and the column 112 further enhances the stability of the structure under complex working conditions.

[0023] Specifically, by setting the self-adjusting component 12 in the positioning mechanism 1 and using the structure design in which the movable frame 122 is slidably mounted on the fixed frame 121 through the mounting component 113, the effects of dynamically buffering the horizontal vibration of the sound insulation unit 3, absorbing energy, and avoiding structural damage caused by rigid connection are achieved. By setting the cooperation between the support component 11 and the self-adjusting component 12 in the positioning mechanism 1 and combining the connection function of the mounting component 113, the effects of suppressing the transmission of horizontal vibration and improving the overall structural stability are achieved. By adopting the slidable connection structure between the fixed frame 121 and the movable frame 122 in the self-adjusting component 12 and cooperating with the mounting function of the mounting component 113, the problem of easy loosening of traditional rigid connections is avoided, and the long-term reliability of the structural connection is realized. By modularizing the design of the positioning mechanism 1 and dividing the positioning mechanism 1 into a support component 11, a self-adjusting component 12, and a mounting component 113, the effects of simplifying the installation process, supporting quick disassembly and maintenance are achieved, and the problem of inconvenient disassembly of the traditional structure is solved.

[0024] Embodiment 2 In order to realize the dynamic buffering function of the self-adjusting component for horizontal vibration, as Figure 4 , Figure 7 and Figure 9 shown, in this embodiment, the first positioning rib 1221 of the movable frame 122 and the second groove 3131 of the side column 313 form a sliding pair, allowing the sound insulation unit 3 to be quickly disassembled and assembled in the vertical direction. The reserved groove 1211 of the fixed frame 121 has an elliptical cross-section with the long axis along the horizontal direction, matching the shape of the first positioning rib 1221, strictly limiting the movable frame 122 to slide only in the horizontal direction, avoiding vertical displacement, and ensuring that the vibration energy is concentrated on the horizontal buffering path.

[0025] The stiffness of the elastic member 1132 of the helical spring is designed to be 50 - 100 N / mm, which can be adjusted according to the actual working conditions. When the movable frame 122 is subjected to a horizontal force, the spring compression amount ≤ 20 mm, corresponding to the displacement of the movable frame 122 ≤ 50 mm, matching the stroke limit of the reserved groove 1211. The elastic restoring force of the spring always pushes the movable frame 122 towards the initial position, ensuring the continuous cooperation between the first positioning rib 1221 and the first groove 3111 and preventing loosening. A locknut is used on the mounting bolt 1133. After tightening, the fixed frame 121 is rigidly connected to the column 112, and the movable frame 122 is elastically connected to the column 112 through the spring; during maintenance, only the mounting bolt 1133 needs to be disassembled to separate the movable frame 122 from the fixed frame 121, facilitating the replacement of damaged components.

[0026] When a high-speed vehicle passes by, the lateral force of the pneumatic load acts on the sound insulation unit 3 and is transmitted to the elastic member 1132 through the movable frame 122. The hysteretic damping characteristic of the spring combined with the frictional damping of the rubber sealing ring 33 consumes the vibration energy together and reduces the secondary noise radiation caused by vibration.

[0027] Embodiment III In order to achieve vibration suppression and structural strengthening of the sound insulation unit in the vertical direction, as Figure 3 、 Figure 5 and Figure 8 shown, in this embodiment, the buffer plate 4 is made of ethylene propylene diene monomer (EPDM). Its weather resistance and elasticity with a Shore hardness of 30 - 50 can ensure stable performance in the environment of -40°C to 80°C; the thickness is adjusted according to the height of the sound insulation unit 3, taking 5 mm when the height ≤ 2 m and 15 mm when the height ≥ 3 m.

[0028] The second positioning rib 41 of the buffer plate 4 has a trapezoidal cross-section, with a width of 5 - 8 mm and a height of 3 - 5 mm, and forms an interference fit with the first groove 3111 of the cross beam 311, with a fit tolerance of ±0.2 mm, which not only ensures the reliable connection between the buffer plate 4 and the sound insulation unit 3 but also absorbs vibration through rubber deformation and allows for a small vertical displacement.

[0029] The transverse reinforcing rib 321 is made of aluminum alloy and has a circular cross-section. It is horizontally embedded inside the sound insulation board 32. There are holes on the sound insulation material of the sound insulation board 32 that match it, and the transverse reinforcing rib 321 is inserted with glue. The transverse reinforcing rib 321 is parallel to the buffer plate 4 but does not contact it, avoiding rigid connection in the vibration transmission path, and can improve the vibration resistance performance of the sound insulation board 32 through a composite structure of "elastic support + rigid reinforcement".

[0030] When the sound insulation unit 3 is vertically vibrated, such as by road surface mechanical vibration or vehicle bumping, the rubber of the buffer plate 4 deforms to absorb low-frequency vibration energy. The stiffness ratio of the transverse reinforcing rib 321 to the sound insulation plate 32 matrix is 2:1, and the transmission of high-frequency vibration is suppressed through stiffness matching to achieve broadband vibration isolation.

[0031] The sealing ring 33 is made of silica gel with a Shore hardness of 40-60 and is embedded in the gap between the sound insulation plate 32 and the mounting bracket 31. It not only improves the sound insulation and sealing performance but also absorbs minute vibrations through elastic deformation to further reduce noise radiation.

[0032] The top fixing member 2 is bolted to the column 112 and adopts a double-nut anti-loosening structure to form a top constraint on the sound insulation unit 3 to prevent it from overturning under strong wind conditions. At the same time, a small horizontal displacement is achieved through the movable frame 122 of the self-adjusting component 12, thereby balancing the structural stiffness and buffering requirements.

[0033] When the present invention is in use: Fix the base 111 at the preset position on the highway subgrade through embedded bolts, ensuring that the base 111 is horizontal and firmly connected to the ground. The embedded bolts need to calculate the embedment depth and spacing according to the design load to ensure the foundation support strength.

[0034] Vertically fix the column 112 on the base 111, which can be done by welding or bolt connection. When installing the column 112, it is necessary to ensure that the verticality error ≤ 2 mm / m to avoid installation deviation of subsequent components. The installation holes 1121 on the surface of the column 112 need to face the installation direction of the sound insulation unit 3 to facilitate the embedding of the installation component 113.

[0035] Fit the fixing frame 121 to the surface of the column 112 so that the first communication hole 1212 of the fixing frame 121 aligns with the installation hole 1121 of the column 112.

[0036] Insert the nut column 1131 of the installation component 113 into the installation hole 1121 from the inside of the column 112, and sequentially put on elastic members 1132, such as spiral springs, so that one end of the elastic member 1132 abuts against the surface of the column 112.

[0037] Align the first communication hole 1212 of the fixing frame 121 with the nut column 1131, and initially fix the fixing frame 121 through the installation bolt 1133 to ensure a rigid connection between the fixing frame 121 and the column 112. At this time, the elastic member 1132 is in a natural stretched state.

[0038] Align the first positioning rib 1221 of the movable frame 122 with the reserved groove 1211 of the fixing frame 121, and slowly push it in horizontally so that the second communication hole 1222 of the movable frame 122 is coaxial with the first communication hole 1212 of the fixing frame 121.

[0039] Pass through the second communication hole 1222 and screw the installation bolt 1133 into the first communication hole 1212. At this time, one end of the elastic member 1132 abuts against the column 112, and the other end abuts against the movable frame 122 to form an elastic connection. Ensure that the movable frame 122 can slide horizontally along the reserved groove 1211 without jamming, and the compression amount of the elastic member 1132 meets the design requirements.

[0040] Fix the cross beam 311 and the side column 313 through the angle code 312 to form a rectangular frame. When installing the angle code 312, it is necessary to ensure that the cross beam 311 and the side column 313 are perpendicular.

[0041] Apply a small amount of lubricant in the first groove 3111 of the cross beam 311 and the second groove 3131 of the side column 313 to facilitate the subsequent installation of the buffer plate 4 and the positioning protrusion of the movable frame 122.

[0042] Embed the sound insulation board 32 into the frame of the mounting rack 31, and the edge fits the sealing ring 33. Ensure that the sealing ring 33 tightly fills the gap between the sound insulation board 32 and the mounting rack 31 to improve the sound insulation and sealing performance.

[0043] The transverse reinforcing rib 321 is pre-embedded in the horizontal hole position inside the sound insulation board 32 through a gluing process to ensure a rigid integral body with the sound insulation board 32.

[0044] Align the first groove 3111 of the cross beam 311 of the sound insulation unit 3 with the first positioning protrusion 1221 of the movable frame 122, and slowly push it in horizontally so that the first positioning protrusion 1221 of the movable frame 122 is completely embedded in the first groove 3111 to form a sliding pair. Ensure that the movable frames 122 on both sides of the sound insulation unit 3 are symmetrically installed and the horizontal displacement reserved amounts are the same.

[0045] Select the thickness of the buffer plate 4 according to the height of the sound insulation unit 3, align the second positioning protrusion 41 of the buffer plate 4 with the second groove 3131 of the side column 313, and snap it into place in the vertical direction.

[0046] Ensure that the buffer plate 4 is in close contact with the upper and lower end faces of the sound insulation unit 3, and the interference fit tolerance between the second positioning protrusion 41 and the second groove 3131 is ±0.2 mm. The vertical positioning and vibration absorption are realized through the elastic deformation of the rubber.

[0047] Connect the top fixing member 2 to the top of the column 112 through bolts, and adopt a double-nut anti-loosening structure. During installation, it is necessary to adjust the position of the top fixing member 2 so that it presses the top of the sound insulation unit 3 to form a rigid limit, inhibit the vertical shaking of the sound insulation unit 3, and enhance the wind resistance stability.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A highway sound insulation barrier with a buffer structure, characterized in that The sound insulation barrier includes: a positioning mechanism (1), a top fixing member (2), a sound insulation unit (3), and a buffer plate (4); The buffer plate (4) is installed at the upper and lower ends of the sound insulation unit (3); The top fixing member (2) forms a top limit for the sound insulation unit (3); The positioning mechanism (1) is installed at the left and right ends of the sound insulation unit (3), and the positioning mechanism (1) includes a support assembly (11) and a self-adjusting assembly (12); the support assembly (11) is used to provide basic support for the sound insulation barrier; The self-adjusting assembly (12) includes a fixed frame (121) and a movable frame (122), and the movable frame (122) is slidably installed on the fixed frame (121); The self-adjusting assembly (12) suppresses the horizontal vibration of the sound insulation unit (3) through the movable frame (122).

2. The sound insulation barrier for expressway with a buffer structure according to claim 1, wherein, The sound insulation barrier includes: The support assembly (11) includes a base (111) and a column (112), the base (111) is fixed to the ground through embedded bolts, and the column (112) is vertically and fixedly installed on the base (111) to form a vertical support structure; mounting holes (1121) are formed on the surface of the column (112) for embedding a mounting component (113).

3. The highway sound insulation barrier with a buffer structure according to claim 2, characterized in that, The fixed frame (121) is fixedly connected to the column (112) through the mounting component (113), and a reserved groove (1211) with an elliptical cross-section and a first communication hole (1212) are formed on its surface; the movable frame (122) is slidably installed on the fixed frame (121) through the mounting component (113), and a first positioning rib (1221) and a second communication hole (1222) are provided on its surface. The first positioning rib (1221) is slidably matched with the first groove (3111) of the sound insulation unit (3), and the second communication hole (1222) is coaxial with the first communication hole (1212) and has a matching aperture.

4. The highway sound insulation barrier with a buffer structure according to claim 3, characterized in that The mounting component (113) includes a nut column (1131), an elastic member (1132) with a helical spring structure, and a mounting bolt (1133); the elastic member (1132) is sleeved on the nut column (1131), one end abuts against the column (112), and the other end abuts against the movable frame (122), and absorbs horizontal vibration energy through elastic deformation; one end of the nut column (1131) facing away from the column (112) sequentially passes through the first communication hole (1212) and the second communication hole (1222), and the fixed frame (121) is fixed through the mounting bolt (1133) to realize the quick disassembly and assembly of the movable frame (122) and the fixed frame (121), and the movable frame (122) can move relative to the fixed frame (121) under the action of the elastic member (1132).

5. The highway sound insulation barrier with a buffer structure according to claim 4, characterized in that, The sound insulation unit (3) includes a mounting frame (31) and a sound insulation board (32), and the mounting frame (31) is formed by fixedly connecting a cross beam (311) and side columns (313) through angle codes (312) to form a rectangular frame.

6. The highway sound insulation barrier with a buffer structure according to claim 5, characterized in that, A first groove (3111) is formed on the surface of the cross beam (311), and the first groove (3111) matches the first positioning rib (1221) of the movable frame (122). A second groove (3131) is formed on the surface of the side column (313), and the second groove (3131) matches the second positioning rib (41) of the buffer plate (4).

7. The highway sound insulation barrier with a buffer structure according to claim 6, characterized in that, The sound insulation board (32) is embedded in the frame of the mounting frame (31), and a sealing ring (33) is provided at its edge. The sealing ring (33) is in close contact with the inner sides of the cross beam (311) and the side column (313). A plurality of horizontal reinforcing ribs (321) are horizontally and equidistantly embedded inside the sound insulation board (32). The horizontal reinforcing ribs (321) are arranged in parallel with the buffer plates (4) at the upper and lower ends of the sound insulation unit (3) and do not directly contact each other, so as to enhance the overall structural strength of the sound insulation board (32) and reduce the risk of deformation and damage under long-term vibration loads.

8. A highway sound insulation barrier with a buffer structure according to claim 7, characterized in that, A second positioning rib (41) is provided on the surface of the buffer plate (4), and the buffer plate (4) is clamped with the second groove (3131) of the side column (313) through the second positioning rib (41) to absorb the vibration energy in the vertical direction.

9. The sound insulation barrier for expressways with a buffer structure according to claim 8, characterized in that, The buffer plate (4) is made of ethylene propylene diene monomer rubber with a Shore hardness of 30-50 and a thickness of 5-15 mm.

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