Overpass sound barrier

Abstract

The utility model provides a viaduct sound insulation screen, including stand, screen body, positioner, still can configure bottom partition component and apron. The both sides of stand are equipped with installation groove, and the bottom is fixed to viaduct guardrail through mounting seat, and a plurality of screen bodies are installed in the installation groove of adjacent stand in upper and lower layers, and the upper end positioning hole of screen body is adapted with lower end positioning column to realize longitudinal positioning. The positioner contains base and positioning block, and the positioning block is inserted into the installation groove through stand jackplug and abuts against screen body, and the base is fixed through screw rod nut to fix screen body transversely. The bottom partition component blocks the bottom gap, and the apron buckling stand top. The sound insulation screen is convenient to install, and the structure is stable, can effectively improve sound insulation effect, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of sound barrier technology, specifically a sound barrier for elevated bridges. Background Technology

[0002] In urban transportation construction, elevated highways, as an important infrastructure for alleviating ground traffic pressure, are increasing in both number and mileage. However, the resulting traffic noise pollution problem is becoming increasingly prominent. The high volume of traffic and the high speeds of vehicles on elevated highways generate noise from tire-road friction, engine operation, and vehicle horns, which severely disrupts the environment of surrounding residential areas, schools, hospitals, and other areas. This affects residents' daily lives, studies, and rest, and may even endanger their health. Therefore, effective noise isolation measures for elevated highways have become an important requirement for urban environmental governance.

[0003] Currently available elevated highway noise barriers have several shortcomings in structural design and practical application. Some barriers lack stable positioning and fixing structures between the barrier body and the columns, causing the barrier to wobble within the column mounting slots after installation. Long-term use not only generates additional vibration noise but also accelerates wear between the barrier body and the columns, shortening the overall lifespan of the noise barrier. Furthermore, existing noise barriers have poor gap sealing, especially at the bottom and top of the columns, allowing noise to leak through and reducing sound insulation effectiveness. In addition, the installation process for some noise barriers is complex; when stacking barriers, they may become misaligned, requiring repeated adjustments, increasing installation difficulty and construction time, and hindering efficient construction. Utility Model Content

[0004] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide an elevated bridge sound barrier that is easy to install, structurally stable, and improves sound insulation performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sound barrier for elevated bridges, comprising:

[0007] The column has symmetrical mounting slots on both sides; the bottom of the column is fixed with a mounting base, which is then fixed to the guardrail of the viaduct.

[0008] The screen body is installed in the mounting slots of two adjacent columns at both ends; multiple screen bodies are configured and stacked one on top of the other between two adjacent columns; the upper end of the screen body is provided with a positioning hole and the lower end is provided with a positioning post that matches the positioning hole, and the positioning post is inserted into the positioning hole of the adjacent screen body below.

[0009] The positioner includes a base and a positioning block; the positioning block is fixed on the base; the column is provided with an insertion hole adapted to the positioning block, and the insertion hole communicates with the mounting groove; the base is placed on the outside of the column, and the front end of the positioning block passes through the insertion hole from the outside of the column and is inserted into the mounting groove; the base is provided with a first mounting hole; a first screw adapted to the first mounting hole is fixedly provided on the column, the first screw is inserted into the first mounting hole, and the base is fixed on the column by screwing a nut on the first screw, and one side of the positioning block abuts against the side of the screen.

[0010] Preferably, the mounting base is provided with a second mounting hole, and a second screw adapted to the second mounting hole is installed on the guardrail of the viaduct. The second screw is inserted into the second mounting hole, and the mounting base is fixed to the guardrail of the viaduct by screwing a nut onto the second screw. A pad is fixedly provided on the base. The pad is located in the mounting groove. The upper end face of the pad abuts against the lower end face of the screen.

[0011] Preferably, it further includes a bottom partition component; the bottom partition component includes a horizontal plate and two vertical plates; the horizontal plate is placed between two adjacent columns; the two ends of the horizontal plate abut against the sides of the pads of the two adjacent columns respectively; the horizontal plate is provided with through holes adapted to the positioning columns; the vertical plates are vertically fixed to the sides of the horizontal plate; the two vertical plates are symmetrically arranged on both sides of the horizontal plate; the inner sides of the vertical plates abut against the outer sides of the screen body; the columns are provided with a first screw hole, and the vertical plates are provided with elliptical holes that match the first screw hole, and the vertical plates are fixed to the columns by screwing bolts through the elliptical holes into the first screw holes.

[0012] Preferably, the locator has two positioning blocks; the two positioning blocks are symmetrically arranged on the base at intervals; the column has two insertion holes corresponding to the two positioning blocks; the two insertion holes are respectively connected to the two mounting slots on the column.

[0013] Preferably, a first guide slope is provided on the side of the positioning block that abuts against the screen body; a second guide slope is provided on the screen body that fits against the first guide slope; when the positioning block is inserted into the socket, the first guide slope slides against the second guide slope, and the positioning block pushes the screen body to slide away from the positioning block.

[0014] Preferably, it also includes a cover plate; the cover plate is fastened to the top of the column; the cover plate has a C-shaped cross-section; two spring clips are fixedly installed inside the cover plate; the two spring clips are symmetrically arranged; the spring clips are placed in the mounting groove of the column and abut against the column.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The support column has symmetrical mounting slots on both sides to provide a stable mounting track for the screen and ensure that the screen is installed in a precise position. Multiple screens are stacked and positioned by matching the upper positioning holes with the lower positioning posts, which effectively avoids the screens from being misaligned during installation, ensures the flatness of the overall sound insulation surface, reduces longitudinal gaps, improves the basic sound insulation effect, and facilitates the uniform adjustment of the screen position in the future.

[0017] The positioning block of the locator can pass through the column insertion hole, insert into the mounting slot, and abut against the side of the screen. Together with the screw and nut to fix the base, it can apply a stable lateral clamping force to the screen, effectively preventing the screen from shaking in the mounting slot, avoiding additional noise and component wear caused by shaking, and extending the service life of the screen and column. At the same time, the positioning block is compatible with the guide slope on the screen, which can push the screen to automatically calibrate the lateral position during installation, simplifying the installation process and improving construction efficiency.

[0018] The pads on the base are located in the mounting groove and their upper surfaces abut against the lower surface of the bottom screen. This supports the bottom screen, preventing it from being directly pressed against the screws of the mounting base and deformed. This ensures the structural integrity of the screen and further extends its service life.

[0019] The horizontal plate of the bottom partition component can cover the bottom gap between adjacent columns, and the vertical plate fits against the outside of the screen and is fixed to the column. It can effectively seal the gap at the bottom of the soundproof screen, reduce noise leakage through the bottom gap, and significantly improve the overall sound insulation effect. At the same time, the vertical plate can also play a secondary role in fixing the screen, enhancing the stability of the screen installation.

[0020] The cover plate is fastened to the top of the column, and its internal symmetrical spring pieces can be inserted into the mounting slot and abut against the column. It can be fixed without additional fasteners. It can effectively prevent dust from entering the mounting slot, avoid dust accumulation that may cause the screen to jam, and facilitate the replacement and maintenance of the screen in the future. It can also seal the gap at the top of the column, further improving the sound insulation effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a structural breakdown diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the screen in this utility model;

[0024] Figure 4 This is a schematic diagram of the positioner in this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the column in this utility model;

[0026] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0027] Figure 7 This is a schematic diagram of the bottom partition component in this utility model;

[0028] Figure 8 This is a schematic diagram of the cover plate in this utility model;

[0029] Figure 9 for Figure 8 A magnified view of a section at point B.

[0030] in:

[0031] 1. Column; 11. Mounting groove; 12. First screw; 13. Second mounting hole; 14. First screw hole; 15. Mounting base; 16. Pad; 17. Insertion hole; 2. Bottom partition component; 21. Horizontal plate; 22. Vertical plate; 23. Oval hole; 24. Through hole; 3. Positioner; 31. First guide slope; 32. Positioning block; 33. First mounting hole; 34. Base; 4. Cover plate; 41. Spring piece; 5. Screen body; 51. Positioning post; 52. Second guide slope; 53. Positioning hole. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] like Figures 1 to 9 As shown, a sound barrier for an elevated bridge includes:

[0034] The column 1 has symmetrical mounting slots 11 on both sides; the bottom of the column 1 is fixedly provided with a mounting base 15, which is installed and fixed on the guardrail of the viaduct; the basic structure of the column 1 is the same as the existing column 1, with a long straight section at the bottom and a bent section at the top, and the mounting slots 11 are continuously distributed on the long straight section and the bent section; the outer side of the bent section is provided with a mounting opening, which communicates with the mounting slot 11, and the screen body 5 can be placed into the mounting slot 11 through the mounting hole;

[0035] The screen body 5 is installed at both ends in the mounting slots 11 of two adjacent columns 1. Multiple screen bodies 5 are configured, and the multiple screen bodies 5 are stacked vertically between two adjacent columns 1. The upper end of the screen body 5 is provided with a positioning hole 53, and the lower end is provided with a positioning post 51 that matches the positioning hole 53. The positioning post 51 is inserted into the positioning hole 53 of the adjacent screen body 5 below. The basic structure of the screen body 5 is the same as that of the existing screen body 5, and is improved on the basis of the existing structure. The column 1 of the upper screen body 5 is inserted into the positioning hole 53 of the lower screen body 5, which can keep the screen body 5 aligned vertically and will not be distributed horizontally between two columns 1, making it easy to adjust the overall position of the screen body 5.

[0036] The positioner 3 includes a base 34 and a positioning block 32. The positioning block 32 is fixed on the base 34. A mounting post 1 has an insertion hole 17 that matches the positioning block 32, and the insertion hole 17 communicates with the mounting groove 11. The base 34 is placed on the outside of the post 1, and the front end of the positioning block 32 passes through the insertion hole 17 from the outside of the post 1 and is inserted into the mounting groove 11. The base 34 has a first mounting hole 33. A first screw 12 that matches the first mounting hole 33 is fixedly installed on the post 1. The first screw 12 is inserted into the first mounting hole 33, and the base 34 is fixed to the post 1 by screwing a nut onto the first screw 12. One side of the positioning block 32 abuts against the side of the screen body 5. After the screen body 5 is installed between the posts 1, the positioner 3 is used to adjust the position of the screen body 5 between two adjacent posts 1 and fix the screen body 5 between the two posts 1, preventing the screen body 5 from shaking in the mounting groove 11 and extending its service life. When installing the sound barrier, first install the column 1 on the guardrail of the overpass. Use instruments to check whether the column 1 is vertical. After installing the column 1, insert multiple screen panels 5 downwards into the mounting groove 11 from the mounting opening at the top of the column 1. Leave a certain gap between the end of the screen panel 5 and the column 1 in the mounting groove 11 to facilitate the downward placement of the screen panel 5. Insert the column 1 of the upper screen panel 5 into the positioning hole 53 of the lower screen panel 5 so that multiple screen panels 5 form a whole structure. Install the locator 3 on the column 1 and adjust the left and right position of the screen panel 5 through the locator 3. Fix the screen panel 5 in the middle through the two corresponding locators 3 on the two columns 1. You can install one screen panel 5 first and then use the locator 3 to adjust and fix the position of the screen panel 5, or you can install all the screen panels 5 and then use the locator 3 to adjust the position.

[0037] In this embodiment, the mounting base 15 is provided with a second mounting hole 13, and a second screw adapted to the second mounting hole 13 is installed on the guardrail of the viaduct. The second screw is inserted into the second mounting hole 13, and the mounting base 15 is fixed to the guardrail of the viaduct by screwing a nut onto the second screw. A pad 16 is fixedly provided on the base 34. The pad 16 is located in the mounting groove 11. The upper end surface of the pad 16 abuts against the lower end surface of the screen body 5. The pad 16 is used to lift the lowermost screen body 5 to prevent the screen body 5 from sitting directly on the second screw and causing the screen body 5 to be deformed by pressure.

[0038] In this embodiment, a bottom partition component 2 is also included; the bottom partition component 2 includes a horizontal plate 21 and two vertical plates 22; the horizontal plate 21 is placed between two adjacent columns 1; the two ends of the horizontal plate 21 respectively abut against the sides of the pads 16 of the two adjacent columns 1; the horizontal plate 21 is provided with through holes 24 that are adapted to the positioning post 51; the vertical plates 22 are vertically fixed to the sides of the horizontal plate 21; the two vertical plates 22 are symmetrically arranged on both sides of the horizontal plate 21; the inner side of the vertical plate 22 abuts against the outer side of the screen body 5; the column 1 is provided with a first screw hole 14, and the vertical plate 22 is provided with an elliptical hole 23 that matches the first screw hole 14. The vertical plate 22 is fixed to the column 1 by screwing a bolt through the elliptical hole 23 into the first screw hole 14. The bottom partition component 2 is used to seal the gap at the position of the pad 16 at the bottom of the soundproof screen, thereby improving the noise isolation effect. At the same time, it can also be used to fix the screen 5 a second time after the positioner 3 has adjusted the position of the screen body 5, thereby improving the stability of the installation of the screen body 5.

[0039] In this embodiment, the locator 3 has two positioning blocks 32; the two positioning blocks 32 are symmetrically arranged on the base 34 at intervals; the column 1 has two insertion holes 17 corresponding to the two positioning blocks 32; the two insertion holes 17 are respectively connected to the two mounting slots 11 on the column 1. One locator 3 can simultaneously position and fix the screens 5 on both sides of the column 1, improving installation efficiency.

[0040] In this embodiment, a first guide slope 31 is provided on the side of the positioning block 32 that abuts against the screen body 5; a second guide slope 52 that fits against the first guide slope 31 is provided on the screen body 5; when the positioning block 32 is inserted into the socket 17, the first guide slope 31 slides against the second guide slope 52, and the positioning block 32 pushes the screen body 5 to slide away from the positioning block 32.

[0041] In this embodiment, a cover plate 4 is also included; the cover plate 4 is fastened to the top of the column 1; the cross-sectional shape of the cover plate 4 is C-shaped; two spring clips 41 are fixedly installed inside the cover plate 4; the two spring clips 41 are symmetrically arranged; the spring clips 41 are placed in the mounting groove 11 of the column 1 and abut against the column 1. The spring clips 41 are used to fasten the cover plate 4 to the column 1. The cover plate 4 prevents dust from entering the mounting groove 11 of the column 1 and avoids the screen body 5 from getting stuck in the mounting groove 11, making it easier to replace the screen body 5 later.

[0042] Working principle

[0043] This elevated bridge noise barrier achieves noise isolation and structural stability through a collaborative design of "modular assembly + multi-dimensional fixing + gap sealing." Its core principle can be broken down into three parts:

[0044] (I) Structural Assembly Principle

[0045] Column 1 Positioning Support: As the core load-bearing structure, the symmetrical mounting slots 11 on both sides of the column 1 provide a precise installation track for the screen body 5; the bottom mounting base 15 is rigidly connected to the overpass guardrail through the second screw to ensure that the column 1 is vertically fixed and provides a stable support foundation for the overall sound barrier.

[0046] Screen 5 stacking positioning: Multiple screens 5 are installed in a "top-bottom stacking" manner. The positioning post 51 at the bottom of the upper screen 5 is precisely inserted into the positioning hole 53 at the top of the lower screen 5, forming a longitudinal positioning constraint. This prevents the screens 5 from being misaligned in the mounting groove 11, ensuring the flatness of the overall sound insulation surface, and reducing noise leakage caused by longitudinal gaps.

[0047] Positioner 3 provides bidirectional fixation: Positioner 3 achieves lateral fixation of screen body 5 through the structure of "base 34 + positioning block 32". Positioning block 32 is inserted into mounting groove 11 through the insertion hole 17 of column 1, with one side abutting against the side of screen body 5; through the tightening action of the first screw 12 and nut, base 34 drives positioning block 32 to apply lateral pressure to screen body 5, forming a "bidirectional clamping" with the positioner 3 of the two columns 1, preventing screen body 5 from shaking in mounting groove 11 and ensuring structural stability.

[0048] (II) Noise Isolation Principle

[0049] Main sound insulation: The screen 5 uses sound insulation materials (in combination with the existing screen 5 structure) to block the transmission of traffic noise from the viaduct through its own material properties, forming the main sound insulation barrier.

[0050] Gap sealing: The horizontal plate 21 of the bottom partition component 2 covers the bottom gap between adjacent columns 1, and the vertical plate 22 fits against the outside of the screen body 5 to further seal the side gap; the cover plate 4 fastens to the top of the column 1, which avoids dust accumulation and blockage of the mounting groove 11, while reducing noise leakage from the top gap, forming a "full-enclosed" gap sealing and improving the overall sound insulation effect.

[0051] (III) Principle of Auxiliary Structure

[0052] Pad 16 load-bearing protection: Pad 16 on base 34 is located in mounting groove 11. Its upper end face supports the bottom screen 5, preventing the screen 5 from being directly pressed on the second screw and causing deformation due to pressure, thus extending the service life of the screen 5.

[0053] Guide slope calibration: The first guide slope 31 of the positioning block 32 fits with the second guide slope 52 of the screen body 5. When the locator 3 is installed, the slope can slide to push the screen body 5 to automatically adjust its horizontal position, ensuring that the screen body 5 is centered in the mounting groove 11, simplifying the installation and calibration steps.

[0054] Cover plate 4 is elastically fixed: After the symmetrical spring pieces 41 inside the cover plate 4 are inserted into the mounting groove 11 of the column 1, they generate elastic abutment, and the cover plate 4 can be locked without additional fasteners. This makes it easy to disassemble and assemble, and can effectively prevent dust from entering the mounting groove 11.

[0055] II. Instructions for Use

[0056] (I) Preliminary Preparations

[0057] Check the integrity of the components: confirm that the quantity and specifications of the following components are matched: column 1, screen body 5, locator 3, bottom partition component 2, cover plate 4, pad block 16, screw, nut, bolt, etc.

[0058] On-site positioning and marking: Determine the installation position of column 1 on the overpass guardrail, mark the installation point of the second screw with a level, and ensure that the spacing between adjacent columns 1 is compatible with the length of the screen body 5.

[0059] (II) Installation of column 1

[0060] Fixed mounting base 15: Install the second screw at the marked point on the guardrail, align the mounting base 15 at the bottom of the post 1 with the second screw, insert the second screw into the second mounting hole 13 of the mounting base 15, tighten the nut, and ensure that the mounting base 15 fits tightly with the guardrail.

[0061] Verticality calibration of column 1: Use a level to check whether column 1 is vertical. If it is tilted, adjust the position of mounting base 15 or the thickness of the shim until column 1 is vertically fixed.

[0062] (III) Installation of screen 5

[0063] Single screen body 5 installation: Slowly insert the first screen body 5 into the mounting slot 11 from the mounting port at the top of the column 1, ensuring that both ends of the screen body 5 are fully inserted into the mounting slots 11 of the two adjacent columns 1; at this time, a small gap is left between the screen body 5 and the inner wall of the mounting slot 11 to facilitate subsequent adjustments.

[0064] Multiple screens 5 are stacked: Align the positioning post 51 of the second screen 5 with the positioning hole 53 of the first screen 5, and slowly lower it so that the positioning post 51 is fully inserted into the positioning hole 53 to complete the longitudinal positioning; repeat this step until all screens 5 are stacked and installed according to the design height to form a continuous sound insulation surface.

[0065] (iv) Installation of locator 3 and fixing of screen 5

[0066] Positioner 3 pre-installation: Align the positioning block 32 with the insertion hole 17 on the column 1, so that the front end of the positioning block 32 is inserted into the mounting groove 11, while ensuring that the first mounting hole 33 on the base 34 is aligned with the first screw 12 of the column 1.

[0067] Lateral position calibration: Tighten the nut on the first screw 12 to move the base 34 toward the column 1. The positioning block 32 pushes the screen 5 to adjust its lateral position through the guide slope until the screen 5 is centered (the positioning blocks 32 on both sides are evenly attached to the screen 5).

[0068] Tighten the locator 3: Fully tighten the nut so that the positioning block 32 is tightly against the side of the screen body 5, thereby fixing the screen body 5 horizontally; repeat this step to complete the installation of the locator 3 on all columns 1.

[0069] (v) Installation of bottom partition component 2

[0070] Positioning of horizontal plate 21: Place horizontal plate 21 between two adjacent columns 1, so that both ends of horizontal plate 21 abut against the side of pad block 16 of column 1, while ensuring that the through hole 24 on horizontal plate 21 is aligned with the positioning post 51 of the bottom screen body 5, so as to avoid horizontal plate 21 from blocking screen body 5.

[0071] Fixing the vertical plate 22: Attach the vertical plate 22 to the outside of the screen body 5, align the elliptical hole 23 on the vertical plate 22 with the first screw hole 14 of the column 1, insert the bolt and tighten it, and finely adjust the position of the vertical plate 22 through the elliptical hole 23 to ensure that the vertical plate 22 is tightly attached to the screen body 5, thus completing the sealing of the bottom gap.

[0072] (vi) Installation and finishing of cover plate 4

[0073] Cover plate 4 fastening: Align the C-shaped cover plate 4 with the top of the column 1, insert the internal spring piece 41 into the mounting groove 11 of the column 1, and gently press the cover plate 4. After the spring piece 41 undergoes elastic deformation, it abuts against the inner wall of the mounting groove 11 to fix the cover plate 4.

[0074] Overall inspection: Check whether all components are securely installed, whether the screen 5 is flat and free from wobbling, and whether the gaps are completely sealed; if any looseness is found, retighten the corresponding nuts or bolts to ensure the overall structure is stable.

Claims

1. A sound barrier for elevated bridges, characterized in that, include: The column (1) has symmetrical mounting slots (11) on both sides; the bottom of the column (1) is fixedly provided with a mounting base (15), which is installed and fixed on the guardrail of the viaduct. The screen body (5) is installed in the mounting slots (11) of two adjacent columns (1) at both ends; multiple screen bodies (5) are configured, and multiple screen bodies (5) are stacked in a vertical layer between two adjacent columns (1); the upper end of the screen body (5) is provided with a positioning hole (53), and the lower end is provided with a positioning post (51) that matches the positioning hole (53), and the positioning post (51) is inserted into the positioning hole (53) of the adjacent screen body (5) below; The locator (3) includes a base (34) and a positioning block (32); the positioning block (32) is fixed on the base (34); the column (1) is provided with an insertion hole (17) that is compatible with the positioning block (32), and the insertion hole (17) is connected to the mounting groove (11); the base (34) is placed on the outside of the column (1), and the front end of the positioning block (32) passes through the insertion hole (17) from the outside of the column (1) and is inserted into the mounting groove (11); the base (34) is provided with a first mounting hole (33); the column (1) is fixedly provided with a first screw (12) that is compatible with the first mounting hole (33), the first screw (12) is inserted into the first mounting hole (33), and the base (34) is fixed on the column (1) by screwing a nut on the first screw (12), and one side of the positioning block (32) abuts against the side of the screen (5).

2. The elevated bridge noise barrier as described in claim 1, characterized in that, The mounting base (15) is provided with a second mounting hole (13). A second screw that matches the second mounting hole (13) is installed on the guardrail of the viaduct. The second screw is inserted into the second mounting hole (13). The mounting base (15) is fixed to the guardrail of the viaduct by screwing a nut onto the second screw. A pad (16) is fixedly provided on the base (34). The pad (16) is located in the mounting groove (11). The upper end face of the pad (16) abuts against the lower end face of the screen body (5).

3. The elevated bridge noise barrier as described in claim 2, characterized in that, It also includes a bottom partition component (2); the bottom partition component (2) includes a horizontal plate (21) and two vertical plates (22); the horizontal plate (21) is placed between two adjacent columns (1); the two ends of the horizontal plate (21) respectively abut against the sides of the pads (16) of the two adjacent columns (1); the horizontal plate (21) is provided with through holes (24) that are compatible with the positioning column (51); the vertical plates (22) are vertically fixed to the sides of the horizontal plate (21); the two vertical plates (22) are symmetrically arranged on both sides of the horizontal plate (21); the inner side of the vertical plate (22) abuts against the outer side of the screen body (5); the column (1) is provided with a first screw hole (14), and the vertical plate (22) is provided with an elliptical hole (23) that matches the first screw hole (14). The vertical plate (22) is fixed to the column (1) by screwing the bolt through the elliptical hole (23) into the first screw hole (14).

4. The elevated bridge noise barrier as described in claim 1, characterized in that, The locator (3) has two positioning blocks (32); the two positioning blocks (32) are symmetrically arranged on the base (34) at intervals; the insertion holes (17) on the column (1) are arranged in two corresponding positions to the two positioning blocks (32); the two insertion holes (17) are respectively connected to the two mounting slots (11) on the column (1).

5. The elevated bridge noise barrier as described in claim 1 or 4, characterized in that, The positioning block (32) has a first guide slope (31) on one side that abuts against the screen body (5); the screen body (5) has a second guide slope (52) that fits against the first guide slope (31); when the positioning block (32) is inserted into the socket (17), the first guide slope (31) slides against the second guide slope (52), and the positioning block (32) pushes the screen body (5) to slide away from the positioning block (32).

6. The elevated bridge noise barrier as described in claim 1, characterized in that, It also includes a cover plate (4); the cover plate (4) is fastened to the top of the column (1); the cross-sectional shape of the cover plate (4) is C-shaped; two spring pieces (41) are fixedly installed inside the cover plate (4); the two spring pieces (41) are symmetrically arranged; the spring pieces (41) are placed in the mounting groove (11) of the column (1) and abut against the column (1).

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