Noise reduction device for highway construction

Abstract

The present invention provides a noise reduction device for highway construction, which solves the problem that the roofs of existing movable housing-type noise reduction devices are mostly closed structures, causing noise to reflect back and forth inside the house and unable to be discharged, which has a significant impact on the health of construction workers. The present invention includes two sound barrier walls spaced apart and arranged opposite each other on the left and right sides, the upper ends of the sound barrier walls are bent inward to form a curved wall panel structure, and a sound-discharging space that is transparent from top to bottom is formed between the opposite end surfaces of the curved wall panel structures on the left and right sides. A plurality of cross beam structures spaced apart and arranged front to back are detachably connected between the opposite end surfaces of the curved wall panel structures on the left and right sides. A support base plate is fixedly provided at the bottom of the sound barrier wall, and an elastic support pad is fixedly provided at the bottom of the support base plate. A telescopic device that can be extended and retracted upward and downward is fixedly provided on the outer side of the sound barrier wall, and a running wheel is fixedly provided at the lower end of the telescopic device. When the telescopic device is extended, the running wheel can be pushed to the ground to lift the support pad.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, in particular to a noise reduction device for highway construction. Background Art

[0002] During the construction of urban roads, if the noise is not treated, it will seriously affect the normal life of people around. The existing noise reduction devices are mainly placed around the construction site. In order to be reused, the current noise reduction devices are mostly movable, top-enclosed house-like structures.

[0003] This type of movable house-type noise reduction device has the following problems when in use: (1) Since the roof is a closed structure, the noise is reflected back and forth in the house and cannot be discharged, which has a great impact on the health of the construction workers; (2) Since a large amount of dust will float in the air during construction, this dust will be adsorbed on the sound-absorbing wall in large quantities. The thicker the dust accumulation on the surface of the sound-absorbing wall, the worse the noise absorption and reflection effect of the sound-absorbing wall. It is necessary to manually clean the dust attached to the surface of the sound-absorbing wall frequently, and the cleaning frequency is high, which is more troublesome to use. Summary of the Invention

[0004] In order to solve the problem in the background art that the roofs of existing movable house-type noise reduction devices are mostly closed structures, which causes noise to be reflected back and forth in the house and cannot be discharged, thereby having a great impact on the health of construction workers, the present invention proposes a noise reduction device for highway construction.

[0005] The technical solution of the present invention is: a noise reduction device for highway construction, comprising two sound barrier walls spaced apart and arranged opposite to each other on the left and right sides, the upper ends of the sound barrier walls being bent inwardly to form a curved wall panel structure, a vertically transparent sound exhaust space being formed between the opposing end surfaces of the left and right curved wall panel structures, and a plurality of cross beam structures spaced apart and arranged front to back being detachably connected between the opposing end surfaces of the left and right curved wall panel structures;

[0006] The sound barrier wall is provided with an outer wall panel layer, a first sound absorbing panel layer, a sound insulation cavity panel layer and a second sound absorbing panel layer from the outside to the inside, and a hollow chamber is provided in the sound insulation cavity panel layer;

[0007] The outer wall panel layer includes a first outer wall panel, a plurality of second outer wall panels and a third outer wall panel from bottom to top, wherein the third outer wall panel is an arc-shaped panel structure bent inward, and the first outer wall panel, the second outer wall panel and the third outer wall panel are connected in sequence;

[0008] The first sound-absorbing panel layer includes a plurality of first sound-absorbing unit panels fixedly disposed on the inner sides of the first exterior wall panel, the second exterior wall panel and the third exterior wall panel;

[0009] The sound insulation cavity panel layer includes a plurality of sound insulation cavity panels fixedly arranged on the inner side of the first sound absorbing unit panel, the plurality of sound insulation cavity panels are spliced together in the front-to-back direction and the top-to-bottom direction, and hollow cavity units are formed in the sound insulation cavity panels. The hollow cavity units of the sound insulation cavity panels in the same row are connected by intermediate pipe joints to form a hollow cavity.

[0010] The hollow chamber is filled with liquid water, and an undulating wave structure is provided on the inner side of the second sound-absorbing panel layer;

[0011] A circulation pipe network is provided on the inner side of the sound barrier wall. The lower end of the circulation pipe network is connected to the bottom of the hollow chamber of the sound insulation cavity layer, and the upper end of the circulation pipe network is connected to the top of the hollow chamber of the sound insulation cavity layer. A water pump is provided on the circulation pipe network. The water pump is used to extract liquid water from the hollow chamber from the bottom and pump it into from the top through the circulation pipe network. A plurality of mist nozzles are provided on the circulation pipe network. The mist nozzles are evenly distributed in the inner area corresponding to the sound barrier wall and face one side of the sound barrier wall.

[0012] A water tank with an upper opening is fixed on the inner bottom of the sound barrier wall. The upper opening of the water tank is located directly below the mist nozzle. A sewage outlet is opened at the bottom of the water tank, and a detachable plug is provided at the sewage outlet.

[0013] A third connecting pipe is connected to the circulation pipe network. The connection node between the third connecting pipe and the circulation pipe network is located between the water inlet end of the water pump and the bottom of the hollow chamber. An end of the third connecting pipe away from the circulation pipe network penetrates into the water tank. A second valve is provided on the third connecting pipe.

[0014] A detachable filter assembly is provided in the water tank, and the filter assembly is located above the end of the third connecting pipe that penetrates into the water tank;

[0015] A supporting base plate is fixed to the bottom of the sound barrier wall, an elastic supporting pad is fixed to the bottom of the supporting base plate, a telescopic device that can be extended and retracted up and down is fixed to the outside of the sound barrier wall, and a walking wheel is fixed to the lower end of the telescopic device. When the telescopic device is extended, the walking wheel can be pushed to the ground to lift the supporting pad.

[0016] Preferably, the tops of the first exterior wall panel, the second exterior wall panel and the third exterior wall panel are all provided with upwardly open splicing grooves, and the bottoms of the exterior wall panels are fixedly provided with splicing joints that can be plugged into and cooperate with the splicing grooves.

[0017] Preferably, a plurality of plugs spaced apart vertically are fixedly provided on the side of the first sound-absorbing unit panel facing the exterior wall panel layer;

[0018] A plurality of socket slots spaced apart vertically are provided on the inner side surfaces of the first outer wall panel, the second outer wall panel and the third outer wall panel, and the plugs are inserted into the socket slots.

[0019] Preferably, the circulation pipe network includes a fourth connecting pipe arranged vertically, the lower end of the fourth connecting pipe is connected to the liquid outlet of the water pump, the lower part of the fourth connecting pipe is connected to one end of a fifth connecting pipe, the fifth connecting pipe is provided with a third valve, and the other end of the fifth connecting pipe is connected to the second horizontal pipe extending in the front-to-back direction;

[0020] The second transverse pipe is connected to a plurality of sixth connecting pipes spaced apart in front and back and extending upward, and the sixth connecting pipe is provided with a plurality of mist nozzles spaced apart in upper and lower directions, and the upper end of the sixth connecting pipe is detachably connected to the upper portion of the fourth connecting pipe via a first intermediate pipe joint;

[0021] The upper end of the fourth connecting pipe is detachably connected to the fourth transverse pipe extending in the front-to-back direction through the second intermediate pipe joint. The fourth transverse pipe is connected to one end of the seventh connecting pipe through the third intermediate pipe joint. The other end of the seventh connecting pipe is connected to the top of the hollow chamber of the sound insulation cavity layer through the top pipe joint.

[0022] Preferably, the circulation pipe network includes a first connecting pipe, one end of which passes through the supporting bottom plate and is connected to the bottom pipe joint, and the bottom pipe joint is communicated with the bottom of the hollow chamber of the sound insulation cavity layer;

[0023] The other ends of multiple first connecting pipes arranged at intervals in the front and back are commonly connected to a first transverse pipe extending in the front and back direction. The first transverse pipe is located in the water tank. The first transverse pipe is connected to one end of the second connecting pipe. The second connecting pipe is provided with a first valve. The other end of the second connecting pipe is connected to the water inlet of the water pump. The water pump is fixed in the water tank.

[0024] The advantages of the present invention are as follows: part of the noise generated on the inner side of the sound barrier wall is reflected by the second sound-absorbing board layer and discharged upward from the sound-discharging space between the sound barrier walls on the left and right sides; part of the noise is blocked and absorbed layer by layer by the second sound-absorbing board layer, the sound-absorbing cavity board layer, the liquid water in the sound-absorbing cavity board layer, the first sound-absorbing board layer and the outer wall board layer, which can greatly reduce the extent to which the noise generated on the construction site diffuses to the surrounding low altitudes, thereby reducing the impact of construction noise on surrounding residents; at the same time, part of the noise is discharged to the outside through the sound-discharging space, which can also avoid the problem of noise being repeatedly reflected and unable to be discharged in the noise reduction device, thereby reducing the impact on the health of construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the main structure of Example 1;

[0027] Figure 2 for Figure 1 The schematic diagram of the local structure of the lower area of the sound barrier wall on the middle right;

[0028] Figure 3 for Figure 1 A schematic structural diagram of the middle connecting section of the sound barrier wall on the left side;

[0029] Figure 4 for Figure 1 A magnified view of the structure at point A;

[0030] Figure 5 for Figure 1 A magnified view of the structure at point B in FIG;

[0031] In the figure, 1, the first outer wall panel, 2, the second outer wall panel, 3, the third outer wall panel, 4, the connector, 5, the cross bar, 6, the splicing groove, 7, the splicing joint, 8, the bolt connection plate, 9, the first sound-absorbing unit panel, 901, the plug, 10, the sound insulation cavity panel, 1001, the pipe joint slot, 11, the middle pipe joint, 12, the second sound-absorbing unit panel, 1201, the wave groove, 13, the support bottom plate, 14, the support pad, 15, the protective plate, 16, the telescopic device, 17, the walking wheel, 1 8. Bottom pipe joint, 19. Water sink, 20. Plug, 21. First connecting pipe, 22. First transverse pipe, 23. Second connecting pipe, 24. First valve, 25. Water pump, 26. Third connecting pipe, 27. Second valve, 28. Filter assembly, 29. Fourth connecting pipe, 30. Top pipe joint, 31. Third valve, 32. Second transverse pipe, 33. Sixth connecting pipe, 34. Mist nozzle, 35. Third transverse pipe, 36. First middle pipe joint, 37. Fourth transverse pipe. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0033] Example 1: A noise reduction device for highway construction, such as Figure 1 As shown, it includes two sound barrier walls spaced apart and opposite to each other on the left and right sides, the upper ends of the sound barrier walls are bent inward to form a curved wall panel structure, and a sound exhaust space that is transparent from top to bottom is formed between the opposite end surfaces of the curved wall panel structures on the left and right sides. A plurality of cross beam structures spaced apart from each other on the front and back sides are detachably connected between the opposite end surfaces of the curved wall panel structures on the left and right sides.

[0034] Specifically, such as Figure 1 As shown, a plurality of connectors 4 spaced apart from each other are fixedly mounted on opposite end surfaces of the left and right curved wall panels. The crossbeam structure includes two crossbars 5 bolted together, with the ends of the crossbars 5 bolted to the connectors 4. In other embodiments, depending on the actual width of the construction site, the crossbeam structure may also be constructed using three or four crossbars 5, or the crossbeam structure may be replaced by a telescopic rod structure.

[0035] A supporting base plate 13 is fixed to the bottom of the sound barrier wall, and an elastic supporting pad 14 is fixed to the bottom of the supporting base plate 13. A telescopic device 16 that can be extended and retracted up and down is fixed to the outside of the sound barrier wall, and a walking wheel 17 is fixed to the lower end of the telescopic device 16. When the telescopic device 16 is extended, the walking wheel 17 can be pushed to the ground to lift the supporting pad 14.

[0036] In order to protect the telescopic device 16 and the overall aesthetic effect of the device, as Figure 1 and Figure 2 As shown, a protective plate 15 is fixed to the lower outer portion of the sound barrier. This plate consists of an inclined plate segment and a vertical plate segment, connected sequentially from top to bottom. The upper end of the inclined plate segment is fixedly connected to the lower outer portion of the sound barrier, while the lower end of the vertical plate segment is higher than the bottom of the supporting base plate 13. A reinforcing horizontal plate is fixedly connected to the junction of the inclined and vertical plates. The end of the horizontal plate, distal from the vertical plate segment, is fixedly connected to the outer side of the sound barrier. The upper end of a telescopic device 16 is fixedly connected to the bottom of the horizontal plate. In this embodiment, the telescopic device 16 utilizes a hydraulic rod. In other embodiments, the telescopic device 16 can also be replaced with a telescopic rod structure such as a cylinder.

[0037] The sound barrier wall is provided with an outer wall panel layer, a first sound absorbing panel layer, a sound insulation cavity panel layer and a second sound absorbing panel layer in sequence from the outside to the inside.

[0038] Specifically, such as Figure 1 As shown, the exterior wall panels, from bottom to top, include a first exterior wall panel 1, several second exterior wall panels 2, and a third exterior wall panel 3. The third exterior wall panel 3 is an inwardly curved arc-shaped panel structure. The tops of the first exterior wall panel 1, the second exterior wall panel 2, and the third exterior wall panel 3 are each provided with an upwardly open splicing groove 6. The bottom of the exterior wall panel 2 is fixed with a splicing joint 7 that can be plugged into the splicing groove 6. After the splicing groove 6 and the splicing joint 7 are spliced together, they not only further improve the anti-displacement performance between the first exterior wall panel 1, the second exterior wall panel 2, and the third exterior wall panel 3, but also provide a certain degree of resistance to sound waves passing through the splicing joints.

[0039] Bolt connection plates 8 are fixed to the outer upper end of the first exterior wall panel 1, the outer upper and lower ends of the second exterior wall panel 2, and the outer lower end of the third exterior wall panel 3. Upper and lower adjacent bolt connection plates 8 are fixedly connected by bolts.

[0040] like Figure 2 and Figure 3 As shown, the first sound-absorbing panel layer includes a plurality of first sound-absorbing unit panels 9 fixedly arranged on the inner sides of the first exterior wall panel 1, the second exterior wall panel 2 and the third exterior wall panel 3, and a plurality of plugs 901 spaced apart vertically are fixedly provided on the side of the first sound-absorbing unit panel 9 facing the exterior wall panel layer; the inner side surfaces of the first exterior wall panel 1, the second exterior wall panel 2 and the third exterior wall panel 3 are each provided with a plurality of socket grooves spaced apart vertically, and the plugs 901 are inserted into the socket grooves.

[0041] The sound insulation cavity layer comprises several sound insulation panels 10 fixedly mounted inside the first sound-absorbing unit panel 9. These panels 10 are joined together in the front-to-back and top-to-bottom directions, each defining a hollow chamber unit. Pipe connector slots 1001 are provided at both the top and bottom ends of the panels 10, connecting to the hollow chamber units. The hollow chamber units of the sound insulation cavity panels 10 in the same row are connected by intermediate pipe connectors 11 to form a hollow chamber. The hollow chamber is filled with liquid water, and the intermediate pipe connectors 11 are inserted into the two joined pipe connector slots 1001.

[0042] The bottom pipe joint 18 is inserted into the pipe joint slot 1001 at the bottom of the lowermost sound insulation cavity panel 10 , and the top pipe joint 30 is inserted into the pipe joint slot 1001 at the top of the uppermost sound insulation cavity panel 10 .

[0043] The second sound-absorbing panel layer includes a plurality of second sound-absorbing unit panels 12 fixedly mounted on the inner side of the sound-isolating cavity panel 10. The inner side surfaces of the second sound-absorbing unit panels 12 are provided with undulating grooves 1201. The grooves 1201 on all the second sound-absorbing unit panels 12 are connected to form a wavy structure.

[0044] In order to utilize the liquid water in the hollow chamber to reduce dust in the air inside the sound barrier wall and automatically clean the dust attached to the wave tank 1201, as shown in FIG. Figure 1 As shown, a circulation pipe network is provided on the inner side of the sound barrier wall, the lower end of the circulation pipe network is connected to the bottom of the hollow chamber of the sound insulation cavity layer, and the upper end of the circulation pipe network is connected to the top of the hollow chamber of the sound insulation cavity layer. A water pump 25 is provided on the circulation pipe network, and the water pump 25 is used to extract liquid water in the hollow chamber from the bottom and pump it into from the top through the circulation pipe network. A plurality of mist nozzles 34 are provided on the circulation pipe network, and the mist nozzles 34 are evenly distributed in the inner area corresponding to the sound barrier wall and face one side of the sound barrier wall.

[0045] Specifically, Figure 2 and Figure 4As shown, to improve water resource utilization, a water trough 19 with an upper opening is fixed to the inner bottom of the sound barrier. The upper opening of water trough 19 is located directly below the mist nozzle 34. Water trough 19 collects sewage flowing down the inner wall of the sound barrier. A sewage outlet is provided at the bottom of water trough 19, which is equipped with a removable plug 20. A removable filter assembly 28 is installed within water trough 19, located above the end of the third connecting pipe 26 that enters water trough 19. In this embodiment, filter assembly 28 uses a fine filter mesh to filter out dust from the sewage.

[0046] The circulation pipe network includes a first connecting pipe 21, one end of which passes through the supporting base plate 13 and is connected to the bottom pipe joint 18, and the bottom pipe joint 18 is connected to the bottom of the hollow chamber of the sound insulation cavity layer;

[0047] The other ends of multiple first connecting pipes 21 arranged at intervals in the front and rear are commonly connected to a first transverse pipe 22 extending in the front and rear direction. The first transverse pipe 22 is located in the water tank 19. The first transverse pipe 22 is connected to one end of a second connecting pipe 23. A first valve 24 is provided on the second connecting pipe 23. The other end of the second connecting pipe 23 is connected to the water inlet of a water pump 25. The water pump 25 is fixed in the water tank 19.

[0048] A third connecting pipe 26 is connected to the second connecting pipe 23. The connection node between the third connecting pipe 26 and the second connecting pipe 23 is located between the water inlet end of the water pump 25 and the bottom of the hollow chamber. The third connecting pipe 26 passes through the water tank 19 at one end away from the second connecting pipe 23 and then passes into the water tank 19 again. A second valve 27 is provided on the third connecting pipe 26, and the second valve 27 is located outside the water tank 19.

[0049] like Figure 2 、 Figure 4 and Figure 5 As shown, the circulation pipe network also includes a fourth connecting pipe 29 arranged vertically, the lower end of the fourth connecting pipe 29 is connected to the liquid outlet of the water pump 25, the lower part of the fourth connecting pipe 29 is connected to one end of the fifth connecting pipe, the fifth connecting pipe is provided with a third valve 31, and the other end of the fifth connecting pipe is connected to the second horizontal pipe 32 extending in the front-to-back direction.

[0050] The second transverse pipe 32 is connected to a plurality of sixth connecting pipes 33 spaced apart in front and back and extending upward. The sixth connecting pipe 33 is provided with a plurality of mist nozzles 34 spaced apart in the upper and lower directions. The upper end of the sixth connecting pipe 33 is detachably connected to the upper part of the fourth connecting pipe 29 via a first intermediate pipe joint 36.

[0051] The upper end of the fourth connecting pipe 29 is detachably connected to the fourth transverse pipe 37 extending in the front-to-back direction through the second intermediate pipe joint. The fourth transverse pipe 37 is connected to one end of the seventh connecting pipe through the third intermediate pipe joint. The other end of the seventh connecting pipe is connected to the top of the hollow chamber of the sound insulation cavity layer through the top pipe joint 30.

[0052] Working principle: (1) Part of the noise generated on the inner side of the sound barrier wall is reflected by the second sound-absorbing board layer and discharged upward from the sound-discharging space between the sound barrier walls on the left and right sides. Part of the noise is blocked and absorbed layer by layer by the second sound-absorbing board layer, the sound-absorbing cavity board layer, the liquid water in the sound-absorbing cavity board layer, the first sound-absorbing board layer and the outer wall board layer, which can greatly reduce the extent of the noise generated on the construction site to spread to the surrounding low altitudes, thereby reducing the impact of construction noise on surrounding residents. At the same time, part of the noise is discharged to the outside through the sound-discharging space, which can also avoid the noise from being repeatedly reflected in the noise reduction device and unable to be discharged, thereby reducing the impact on the health of construction workers.

[0053] (2) The liquid water in the sound-absorbing cavity layer is recycled through the circulation pipe network and water pump, mist nozzle, water tank and filter assembly. When spraying, the second valve 27 on the third connecting pipe 26 is closed, and the third valve 31 and the first valve 24 are opened, so that the water flows in the circulation pipe network and the hollow chamber in the sound-absorbing cavity layer. Part of the water passes through the mist nozzle 34 to form water mist and is sprayed out. Part of the water mist combines with dust particles in the air and falls directly into the water tank 19. After the dust is filtered out by the filter assembly 28, liquid water is formed in the water tank 19.

[0054] When the liquid water in the water tank 19 accumulates to a certain level, the second valve 27 on the third connecting pipe 26 can be opened, and the third valve 31 and the first valve 24 can be closed to re-suck the liquid in the water tank 19 into the circulation network for circulation. When water needs to be added, the same operation as above is adopted.

[0055] When the water needs to be replaced after a long period of use, the plug 20 below the water tank 19 can be removed and the water in the circulation pipe network and the hollow chamber can be discharged by continuous spraying.

[0056] (3) The exterior wall panel layer, the first sound-absorbing panel layer, the sound-insulating cavity panel layer and the second sound-absorbing panel layer all adopt a spliced panel structure, which is combined with a measuring structure that can adjust the length, so that the present invention can be used to meet the noise reduction requirements of construction sites of different sizes.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is limited by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A noise reduction device for highway construction, characterized in that: The sound barrier comprises two sound barrier walls spaced apart and arranged opposite to each other on the left and right sides, the upper ends of the sound barrier walls being bent inward to form a curved wall panel structure, a sound exhaust space which is transparent from top to bottom is formed between the opposite end surfaces of the curved wall panel structures on the left and right sides, and a plurality of cross beam structures spaced apart from each other are detachably connected between the opposite end surfaces of the curved wall panel structures on the left and right sides; The sound barrier wall is provided with an outer wall panel layer, a first sound absorbing panel layer, a sound insulation cavity panel layer and a second sound absorbing panel layer from the outside to the inside, and a hollow chamber is provided in the sound insulation cavity panel layer; The outer wall panel layer comprises, from bottom to top, a first outer wall panel (1), a plurality of second outer wall panels (2) and a third outer wall panel (3); the third outer wall panel (3) is an arc-shaped panel structure bent inward; the first outer wall panel (1), the second outer wall panel (2) and the third outer wall panel (3) are connected in sequence; The first sound-absorbing panel layer comprises a plurality of first sound-absorbing unit panels (9) fixedly arranged on the inner sides of the first exterior wall panel (1), the second exterior wall panel (2) and the third exterior wall panel (3); The sound insulation cavity panel layer includes a plurality of sound insulation cavity panels (10) fixedly arranged on the inner side of the first sound absorbing unit panel (9), the plurality of sound insulation cavity panels (10) are spliced with each other in the front-to-back direction and the up-down direction, a hollow cavity unit is provided in the sound insulation cavity panel (10), and the hollow cavity units of the sound insulation cavity panels (10) in the same row are connected by an intermediate pipe joint (11) to form a hollow cavity; The hollow chamber is filled with liquid water, and an undulating wave structure is provided on the inner side of the second sound-absorbing panel layer; A circulation pipe network is provided on the inner side of the sound barrier wall, the lower end of the circulation pipe network is connected to the bottom of the hollow chamber of the sound insulation cavity layer, and the upper end of the circulation pipe network is connected to the top of the hollow chamber of the sound insulation cavity layer. A water pump (25) is provided on the circulation pipe network, and the water pump (25) is used to extract liquid water in the hollow chamber from the bottom and pump it into from the top through the circulation pipe network. A plurality of mist nozzles (34) are provided on the circulation pipe network, and the mist nozzles (34) are evenly distributed in the inner area corresponding to the sound barrier wall and face one side of the sound barrier wall. A water trough (19) with an upper opening is fixedly provided at the inner bottom of the sound barrier wall. The upper opening of the water trough (19) is located directly below the mist nozzle (34). A sewage outlet is provided at the bottom of the water trough (19). A detachable plug (20) is provided at the sewage outlet. A third connecting pipe (26) is connected to the circulation pipe network. The connection node between the third connecting pipe (26) and the circulation pipe network is located between the water inlet end of the water pump (25) and the bottom of the hollow chamber. An end of the third connecting pipe (26) away from the circulation pipe network penetrates into the water tank (19). A second valve (27) is provided on the third connecting pipe (26). A detachable filter assembly (28) is provided in the water tank (19), and the filter assembly (28) is located above one end of the third connecting pipe (26) that penetrates into the water tank (19); A supporting base plate (13) is fixedly provided at the bottom of the sound barrier wall, an elastic supporting pad (14) is fixedly provided at the bottom of the supporting base plate (13), a telescopic device (16) capable of extending and retracting upward and downward is fixedly provided at the outer side of the sound barrier wall, a running wheel (17) is fixedly provided at the lower end of the telescopic device (16), and when the telescopic device (16) is extended, the running wheel (17) can be pushed to the ground to lift the supporting pad (14).

2. A noise reduction device for highway construction according to claim 1, characterized in that: The tops of the first exterior wall panel (1), the second exterior wall panel (2) and the third exterior wall panel (3) are all provided with upwardly open splicing grooves (6), and the bottom of the exterior wall panel (2) is fixedly provided with a splicing joint (7) capable of plugging and cooperating with the splicing grooves (6).

3. A noise reduction device for highway construction according to claim 2, characterized in that: A first sound-absorbing unit panel (9) is fixedly provided with a plurality of plugs (901) spaced apart in an upper and lower direction on one side of the panel facing the outer wall. The inner side surfaces of the first outer wall panel (1), the second outer wall panel (2) and the third outer wall panel (3) are each provided with a plurality of socket slots spaced apart from one another, and the plugs (901) are inserted into the socket slots.

4. A noise reduction device for highway construction according to claim 1, characterized in that: The circulation pipe network includes a fourth connecting pipe (29) arranged vertically, the lower end of the fourth connecting pipe (29) is connected to the liquid outlet of the water pump (25), the lower part of the fourth connecting pipe (29) is connected to one end of a fifth connecting pipe, the fifth connecting pipe is provided with a third valve (31), and the other end of the fifth connecting pipe is connected to a second horizontal pipe (32) extending in the front-to-back direction; The second transverse pipe (32) is connected to a plurality of sixth connecting pipes (33) spaced apart in front and back and extending upward, the sixth connecting pipe (33) is provided with a plurality of mist nozzles (34) spaced apart in upper and lower directions, and the upper end of the sixth connecting pipe (33) is detachably connected to the upper part of the fourth connecting pipe (29) via a first intermediate pipe joint (36); The upper end of the fourth connecting pipe (29) is detachably connected to a fourth transverse pipe (37) extending in the front-to-back direction via a second intermediate pipe joint. The fourth transverse pipe (37) is connected to one end of the seventh connecting pipe via a third intermediate pipe joint. The other end of the seventh connecting pipe is connected to the top of the hollow chamber of the sound insulation cavity layer via a top pipe joint (30).

5. A noise reduction device for highway construction according to claim 4, characterized in that: The circulation pipe network includes a first connecting pipe (21), one end of which passes through the supporting base plate (13) and is connected to the bottom pipe joint (18), and the bottom pipe joint (18) is communicated with the bottom of the hollow chamber of the sound insulation cavity layer; The other ends of the plurality of first connecting pipes (21) arranged at intervals in the front and rear directions are commonly connected to a first transverse pipe (22) extending in the front-to-rear direction. The first transverse pipe (22) is located in the water tank (19). The first transverse pipe (22) is connected to one end of a second connecting pipe (23). The second connecting pipe (23) is provided with a first valve (24). The other end of the second connecting pipe (23) is connected to the water inlet of a water pump (25). The water pump (25) is fixed in the water tank (19).

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