Multi-layer sound insulation wall

By adopting a multi-layer sound insulation wall structure in light steel keel partition walls, combining light steel keels, sound-absorbing materials, gypsum boards and sound insulation felts, and installing shock-absorbing rubber pads at pipe perforations, the poor sound insulation effect of traditional partition walls is solved. problem, significantly improving acoustic performance and shock absorption performance.

CN222390706UActive Publication Date: 2025-01-24CHINA CONSTR FIRST DIV GROUP CONSTR & DEV
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Patent Information

Application Number
CN202420472112.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-12
Publication Date
2025-01-24
Estimated Expiration
2034-03-12

AI Technical Summary

Technical Problem

After the traditional light steel keel partition wall is filled with sound-absorbing materials, it is difficult to meet the needs of places with high requirements for acoustic design. The uniform filling of sound-absorbing materials in thick walls may lead to excessive local density, affecting the sound insulation effect. .

Method used

Adopt a multi -layered soundtrack wall structure, including the concrete structure wall and multiple sound insulation structures. Through vertical and horizontally distributed light steel keel and sound -absorbing material, combined with gypsum board and sound insulation felt, a double -layer keel stand and double -layer sound insulation panel. And install a ring shock absorbing rubber pad and strip shock absorbing glue pad at the pipe pipeline to improve the sound insulation effect.

Benefits of technology

It greatly improves the sound insulation effect, ensures that the outermost wall still has good shock absorption performance after decoration, avoids vibration to weaken the sound insulation effect, and use the installation of the shock absorption rubber pad to avoid the pipe perforation position to affect the sound insulation performance due to vibration.

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Patent Text Reader

Abstract

The utility model discloses a multi-layer sound insulation wall which comprises a concrete structure wall, one side face of the concrete structure wall is provided with a multi-time sound insulation structure, the multi-time sound insulation structure comprises a plurality of first C-shaped light steel main keels which are vertically distributed at equal intervals, and the first C-shaped light steel main keels are all fixedly connected with the concrete structure wall. A plurality of first C-shaped light steel secondary keels which are transversely distributed at equal intervals are fixedly connected between every two adjacent first C-shaped light steel main keels, and a gap between every two adjacent first C-shaped light steel secondary keels is filled with a first sound absorbing material; the double-layer keel frame and the double-layer sound insulation panel are adopted, the sound insulation effect is greatly improved, the damping hanging weight arranged between the outer-layer keel frame and the inner side panel can guarantee the damping performance of the outermost-layer wall body after decoration face construction is completed, and the situation that the sound insulation effect is weakened due to vibration is avoided.
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Description

Technical Field

[0001] The utility model belongs to the technical field of indoor decoration, in particular to a multi-layer sound insulation wall. Background Art

[0002] Lightweight steel keel gypsum board partition walls are light in weight and high in strength. They are often used as interior partition walls in the construction of modern buildings. With the continuous diversification of building functions, more and more high-end hotels, cinemas, conference venues, etc. choose lightweight steel keel gypsum board partition walls as partition walls. However, the general lightweight steel keel partition walls are limited by the material properties of gypsum board and steel keel, and their sound insulation effect is poor. It is difficult to meet the use requirements of places such as conference rooms, cinemas, theaters, etc. that have high requirements for architectural acoustic performance. Especially in the process of building renovation, the space of the room needs to be adjusted according to the new use function to achieve the best spatial acoustic effect.

[0003] Traditional light steel frame partition walls are generally filled with sound-absorbing materials. This approach can ensure that the partition walls have a certain sound insulation effect. However, it still does not meet the use requirements of places with high requirements for acoustic design. At the same time, because the sound-absorbing material needs to be evenly filled in the wall to ensure its performance. When the wall is thick, if all sound-absorbing materials are used to fill it, it is inevitable that the material will be deformed and compressed, resulting in excessive local density, thus affecting the sound insulation effect. Utility Model Content

[0004] The utility model aims to provide a multi-layer sound insulation wall to solve the technical problem that the traditional light steel keel partition wall generally adopts filling sound-absorbing materials and cannot meet the use requirements of places with high requirements on acoustic design.

[0005] The utility model solves the above-mentioned technical problem with the following technical solutions: a multi-layer soundproof wall, comprising a concrete structural wall, wherein one side of the concrete structural wall is provided with multiple soundproof structures, wherein the multiple soundproof structures include a plurality of first C-shaped light steel main keels distributed vertically and equidistantly, wherein the first C-shaped light steel main keels are fixedly connected to the concrete structural wall, a plurality of first C-shaped light steel secondary keels distributed laterally and equidistantly are fixedly connected between two adjacent first C-shaped light steel main keels, and a first sound-absorbing material is filled in the gap between two adjacent first C-shaped light steel secondary keels, and a first gypsum board layer is laid on one side of the plurality of first C-shaped light steel main keels away from the concrete structural wall, a first soundproofing felt is laid on one side of the first gypsum board layer away from the first C-shaped light steel secondary keel, and a first soundproofing felt is laid on one side of the first gypsum board layer away from the first A second gypsum board layer is laid on the side, a side of the second gypsum board layer away from the first sound insulation felt is connected to a plurality of second C-shaped light steel main keels distributed vertically and equidistantly, a plurality of second C-shaped light steel secondary keels arranged horizontally and equidistantly are fixedly connected between two adjacent second C-shaped light steel main keels, a second sound-absorbing material is filled between two adjacent second C-shaped light steel secondary keels, a third gypsum board layer is laid on a side of the plurality of second C-shaped light steel main keels away from the second gypsum board layer, a second sound insulation felt is laid on a side of the third gypsum board layer away from the second C-shaped light steel main keel, a fourth gypsum board layer is laid on a side of the second sound insulation felt away from the third gypsum board layer, a third sound insulation felt is laid on a side of the fourth gypsum board layer away from the second sound insulation felt, and a fifth gypsum board layer is laid on a side of the third sound insulation felt away from the fourth gypsum board layer.

[0006] The utility model adopts the above-mentioned multi-layer sound insulation wall, and further: the concrete structure wall is provided with a pipe through-hole, the pipe through-hole passes through multiple sound insulation structures, the inner wall of the pipe through-hole is inserted with an annular shock-absorbing rubber pad, the inside of the annular shock-absorbing rubber pad is provided with a wall-penetrating pipe, the gap between the wall-penetrating pipe and the annular shock-absorbing rubber pad is filled with a third sound-absorbing material, and the outer side of the wall-penetrating pipe is symmetrically provided with pipe sleeves at both ends of the annular shock-absorbing rubber pad.

[0007] The utility model adopts the above-mentioned multi-layer sound insulation wall, further: one of the pipe sleeves is fixedly connected to the side of the concrete structure wall away from the multiple sound insulation structures through an expansion screw, and the other pipe sleeve is fixedly connected to the fifth gypsum board layer, the third sound insulation felt, the fourth gypsum board layer, the second sound insulation felt, the third gypsum board layer, and the second C-shaped light steel main keel through a fourth self-tapping screw.

[0008] The utility model adopts the multi-layer sound insulation wall described above, and further: a strip-shaped shock-absorbing rubber pad is provided between one end of the multi-layer sound insulation structure and the inner wall at the inner corner of the concrete structure wall.

[0009] The utility model adopts the above-mentioned multi-layer sound insulation wall, and further: a shock-absorbing hanging code is provided between the second C-shaped light steel main keel and the second gypsum board layer, the mounting plate of the shock-absorbing hanging code is fixedly connected to the second gypsum board layer by a third self-tapping screw, and the shock-absorbing end of the shock-absorbing hanging code is fixedly connected to the second C-shaped light steel main keel by a clamp.

[0010] The utility model adopts the above-mentioned multi-layer sound insulation wall, and further: the lower ends of several of the first C-shaped light steel main keels and the bottom ends of several second C-shaped light steel main keels are fixedly connected with C-shaped light steel bottom extension keels, and the bottom of the C-shaped light steel bottom extension keel is fixedly connected to the floor structure at the bottom of the concrete structural wall.

[0011] The utility model adopts the above-mentioned multi-layer sound insulation wall, further: the second gypsum board layer, the first sound insulation felt and the first gypsum board layer are fixedly connected to the first C-shaped light steel main keel through the first self-tapping screws, and the fifth gypsum board layer, the third sound insulation felt, the fourth gypsum board layer, the second sound insulation felt and the third gypsum board layer are fixedly connected to the second C-shaped light steel main keel through the second self-tapping screws.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model adopts the setting of double-layer keel frame and double-layer sound insulation panel, which greatly improves the sound insulation effect. The shock-absorbing hanging code arranged between the outer frame and the inner panel can ensure the shock-absorbing performance of the outermost wall after the decoration surface construction is completed, avoiding the weakening of the sound insulation effect due to vibration.

[0014] 2. The utility model can avoid direct contact or gap between the wall-penetrating pipe and the pipe sleeve by installing the annular shock-absorbing rubber pad, thereby preventing the sound insulation performance from being affected by vibration at the position where the pipe passes through the wall.

[0015] 3. The utility model can avoid direct collision between the first C-shaped light steel secondary keel, the C-shaped light steel bottom extension keel and the end of the panel and the concrete structure wall through the installation of strip shock-absorbing rubber pads, and can prevent pores from being left due to errors caused by processing accuracy, thereby affecting the sound insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only schematic and do not limit the present invention, wherein:

[0017] Figure 1 This is a schematic diagram of a side cross-sectional structure of a multi-layer sound insulation wall according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged soil map at point A in the middle;

[0019] Figure 3 A schematic diagram of the cross-sectional structure of a concrete structural wall at a location where a pipe is pierced is shown in one embodiment;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of a pipe sleeve according to an embodiment of the utility model;

[0021] Figure 5 The figure is a schematic diagram of a top-down cross-sectional structure at a corner of a concrete structure wall according to an embodiment.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Concrete structural wall; 2. First C-type light steel main keel; 3. First C-type light steel secondary keel; 4. First sound-absorbing material; 5. First gypsum board layer; 6. First sound insulation felt; 7. Second gypsum board layer; 8. Second C-type light steel main keel; 9. Second C-type light steel secondary keel; 10. Second sound-absorbing material; 11. Third gypsum board layer; 12. Second sound insulation felt; 13. Fourth gypsum board layer; 14. Third sound insulation felt; 15. Fifth gypsum board layer; 16. First self-tapping screw; 17. Second self-tapping screw; 18. Shock-absorbing hanging code; 19. Third self-tapping screw; 20. Clip; 21. C-shaped light steel bottom extension keel; 22. Annular shock-absorbing rubber pad; 23. Wall-penetrating pipe; 24. Third sound-absorbing material; 25. Pipe sleeve; 26. Expansion screw; 27. Fourth self-tapping screw; 28. Strip shock-absorbing rubber pad. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of the multi-layer sound insulation wall of the present invention will be described with reference to the accompanying drawings.

[0025] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are explanatory and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0026] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the utility model and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structure of various components of the embodiments of the utility model, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0027] Figure 1-5A multi-layer soundproof wall of an embodiment of the utility model is shown, which includes: a concrete structural wall 1, a side of the concrete structural wall 1 is provided with multiple soundproof structures, the multiple soundproof structures include a plurality of first C-shaped light steel main keels 2 distributed vertically and equidistantly, the first C-shaped light steel main keels 2 are fixedly connected to the concrete structural wall 1, a plurality of first C-shaped light steel secondary keels 3 distributed laterally and equidistantly are fixedly connected between two adjacent first C-shaped light steel main keels 2, the gaps between two adjacent first C-shaped light steel secondary keels 3 are filled with first sound-absorbing materials 4, and a first gypsum board layer is laid together on the side of the plurality of first C-shaped light steel main keels 2 away from the concrete structural wall 1 5, a first sound insulation felt 6 is laid on the side of the first gypsum board layer 5 away from the first C-shaped light steel secondary keel 3, a second gypsum board layer 7 is laid on the side of the first sound insulation felt 6 away from the first gypsum board layer 5, and a plurality of second C-shaped light steel main keels 8 vertically equidistantly distributed are connected to the side of the second gypsum board layer 7 away from the first sound insulation felt 6. Specifically, a shock-absorbing hanging code 18 is provided between the second C-shaped light steel main keel 8 and the second gypsum board layer 7, and the mounting plate of the shock-absorbing hanging code 18 is fixedly connected to the second gypsum board layer 7 by a third self-tapping screw 19, and the shock-absorbing end of the shock-absorbing hanging code 18 is fixedly connected to the second C-shaped light steel main keel 8 by a clamp 20; a plurality of first C-shaped light steel The lower end of the main keel 2 and the bottom ends of several second C-shaped light steel main keels 8 are fixedly connected with a C-shaped light steel bottom extension keel 21, and the bottom of the C-shaped light steel bottom extension keel 21 is fixedly connected to the floor structure at the bottom of the concrete structure wall 1; a plurality of second C-shaped light steel secondary keels 9 arranged equidistantly in the horizontal direction are fixedly connected between two adjacent second C-shaped light steel main keels 8, and a second sound-absorbing material 10 is filled between two adjacent second C-shaped light steel secondary keels 9, and a third gypsum board layer 11 is laid on one side of several second C-shaped light steel main keels 8 away from the second gypsum board layer 7, and a second sound insulation felt is laid on the side of the third gypsum board layer 11 away from the second C-shaped light steel main keel 8 12, a fourth gypsum board layer 13 is laid on a side of the second sound insulation felt 12 away from the third gypsum board layer 11, a third sound insulation felt 14 is laid on a side of the fourth gypsum board layer 13 away from the second sound insulation felt 12, a fifth gypsum board layer 15 is laid on a side of the third sound insulation felt 14 away from the fourth gypsum board layer 13, the second gypsum board layer 7, the first sound insulation felt 6 and the first gypsum board layer 5 are fixedly connected to the first C-shaped light steel main keel 2 by a first self-tapping screw 16, and the fifth gypsum board layer 15, the third sound insulation felt 14, the fourth gypsum board layer 13, the second sound insulation felt 12 and the third gypsum board layer 11 are fixedly connected to the second C-shaped light steel main keel 8 by a second self-tapping screw 17.

[0028] The concrete structural wall 1 is provided with a pipe perforation, and the pipe perforation passes through multiple sound insulation structures. An annular shock-absorbing rubber pad 22 is inserted into the inner wall of the pipe perforation. A wall-penetrating pipe 23 is sleeved inside the annular shock-absorbing rubber pad 22. The gap between the wall-penetrating pipe 23 and the annular shock-absorbing rubber pad 22 is filled with a third sound-absorbing material 24. The outer side of the wall-penetrating pipe 23 is symmetrically sleeved with pipe sleeves 25 at both ends of the annular shock-absorbing rubber pad 22. One of the pipe sleeves 25 is fixedly connected to the side of the concrete structural wall 1 away from the multiple sound insulation structures through an expansion screw 26, and the other pipe sleeve 25 is fixedly connected to the fifth gypsum board layer 15, the third sound insulation felt 14, the fourth gypsum board layer 13, the second sound insulation felt 12, the third gypsum board layer 11, and the second C-type light steel main keel 8 through a fourth self-tapping screw 27.

[0029] A strip-shaped shock-absorbing rubber pad 28 is provided between one end of the multiple sound insulation structure and the inner wall of the inner corner of the concrete structure wall 1 .

[0030] Working principle:

[0031] During installation, the original building base is a concrete structural wall 1; first, two C-shaped light steel bottom extension keels 21 are fixed to the bottom floor slab of the concrete structural wall 1 by expansion bolts, and then the first C-shaped light steel main keel 2 is fixed to the concrete structural wall 1 by expansion bolts, and the C-shaped light steel bottom extension keel 21 can realize the fixation and guidance of the first C-shaped light steel main keel 2 and the second C-shaped light steel main keel 8, and then the first C-shaped light steel secondary keel 3 and the first C-shaped light steel main keel 2 are fixed by a bracket to form a skeleton, and then the first sound-absorbing material 4 is filled in the gaps between the first C-shaped light steel secondary keels 3, and the panel is installed after the filling is completed; according to the order of the first gypsum board layer 5, the first sound insulation felt 6, and the second gypsum board layer 7, the first self-tapping screw 16 is used to fix to the first C-shaped light steel main keel The first layer of sound insulation wall is installed on the keel 2; when the outermost layer of sound insulation wall is installed, the shock-absorbing hanging code 18 is fixed to the second outermost layer of sound insulation wall panel by the third self-tapping screw 19, and the shock-absorbing hanging code 18 is fixedly connected to the second C-type light steel main keel 8 of the outermost layer of sound insulation wall through the clamp 20. The shock-absorbing hanging code 18 can ensure the shock-absorbing performance of the outermost wall after the decoration surface construction is completed to avoid the weakening of the sound insulation effect due to vibration; after the outermost layer of sound insulation wall keel is completed, the panel is installed; compared with the inner layer, the outermost layer of sound insulation wall panel is fixed to the second C-type light steel main keel 8 by the second self-tapping screw 17 in the order of the third gypsum board layer 11, the second sound insulation felt 12, the fourth gypsum board layer 13, the third sound insulation felt 14, and the fifth gypsum board layer 15 to ensure that the firmness and sound insulation effect will not be disturbed by the decoration surface operation.

[0032] At the place where the pipe sleeve 25 passes through the wall, firstly, holes are opened on the concrete structural wall 1 and the multi-layer sound insulation structure, and the annular shock-absorbing rubber pad 22 is inserted into the inner wall of the pipe hole, and then the pipe sleeves 25 at both ends are installed, that is, one pipe sleeve 25 is fixedly connected to the side of the concrete structural wall 1 away from the multi-layer sound insulation structure by the expansion screw 26, and the other pipe sleeve 25 is fixedly connected to the outermost structure of the multi-layer sound insulation structure by the fourth self-tapping screw 27, and then the gap between the pipe sleeve 25 and the annular shock-absorbing rubber pad 22 is filled with the third sound-absorbing material 24, and finally the wall-penetrating pipe 23 is installed; the installation of the annular shock-absorbing rubber pad 22 can prevent the wall-penetrating pipe 23 from directly contacting the pipe sleeve 25 or leaving a gap, thereby preventing the sound insulation performance from being affected by vibration at the position where the pipe passes through the wall.

[0033] At the corner of the wall, a strip shock-absorbing rubber pad 28 is installed between the concrete structural wall 1 and the multi-layer sound insulation structure to avoid direct collision between the first C-shaped light steel secondary keel 3, the C-shaped light steel bottom extension keel 21 and the end of the panel and the concrete structural wall 1, and to prevent pores from being retained due to errors caused by processing accuracy, thereby affecting the sound insulation effect.

[0034] In summary, the utility model adopts the setting of double-layer keel frame and double-layer sound insulation panel, which greatly improves the sound insulation effect, and the shock-absorbing hanging code 18 arranged between the outer frame and the inner panel can ensure the shock-absorbing performance of the outermost wall after the decoration surface construction is completed, and avoid the weakening of the sound insulation effect due to vibration; the utility model can avoid the direct contact or gap between the wall-penetrating pipe 23 and the pipe sleeve 25 through the installation of the annular shock-absorbing rubber pad 22, thereby avoiding the sound insulation performance being affected by vibration at the position where the pipe passes through the wall; the utility model can avoid the direct collision between the first C-shaped light steel secondary keel 3, the C-shaped light steel bottom extension keel 21 and the end of the panel and the concrete structure wall 1 through the installation of the strip shock-absorbing rubber pad 28, and can maintain the pores without retaining the error caused by the processing precision, which affects the sound insulation effect.

[0035] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the utility model to achieve the purpose of the utility model.

Claims

1. A multi-layer sound insulation wall, characterized in that: include: A concrete structural wall (1), wherein one side of the concrete structural wall (1) is provided with a plurality of sound insulation structures, wherein the plurality of sound insulation structures comprises a plurality of first C-shaped light steel main keels (2) distributed vertically and equidistantly, wherein the first C-shaped light steel main keels (2) are all fixedly connected to the concrete structural wall (1), a plurality of first C-shaped light steel secondary keels (3) distributed laterally and equidistantly are fixedly connected between two adjacent first C-shaped light steel main keels (2), a first sound absorbing material (4) is filled in the gap between two adjacent first C-shaped light steel secondary keels (3), a first gypsum board layer (5) is laid on one side of the plurality of first C-shaped light steel main keels (2) away from the concrete structural wall (1), a first sound insulation felt (6) is laid on one side of the first gypsum board layer (5) away from the first C-shaped light steel secondary keel (3), a second gypsum board layer (7) is laid on one side of the first sound insulation felt (6) away from the first gypsum board layer (5), and the second gypsum board layer (7) is laid on one side of the second sound insulation felt (6) away from the first gypsum board layer (5). One side of the felt (6) is connected to a plurality of second C-shaped light steel main keels (8) that are vertically equidistantly distributed, a plurality of second C-shaped light steel secondary keels (9) that are laterally equidistantly arranged are fixedly connected between two adjacent second C-shaped light steel main keels (8), a second sound absorbing material (10) is filled between two adjacent second C-shaped light steel secondary keels (9), and a third gypsum board layer (11) is laid on one side of the plurality of second C-shaped light steel main keels (8) that is away from the second gypsum board layer (7). A second sound insulation felt (12) is laid on a side of the third gypsum board layer (11) away from the second C-shaped light steel main keel (8), a fourth gypsum board layer (13) is laid on a side of the second sound insulation felt (12) away from the third gypsum board layer (11), a third sound insulation felt (14) is laid on a side of the fourth gypsum board layer (13) away from the second sound insulation felt (12), and a fifth gypsum board layer (15) is laid on a side of the third sound insulation felt (14) away from the fourth gypsum board layer (13).

2. A multi-layer sound insulation wall according to claim 1, characterized in that: The concrete structural wall (1) is provided with a pipe through-hole, the pipe through-hole penetrates multiple sound insulation structures, an annular shock-absorbing rubber pad (22) is inserted into the inner wall of the pipe through-hole, a wall-penetrating pipe (23) is sleeved inside the annular shock-absorbing rubber pad (22), a third sound-absorbing material (24) is filled in the gap between the wall-penetrating pipe (23) and the annular shock-absorbing rubber pad (22), and pipe sleeves (25) are symmetrically sleeved on the outer side of the wall-penetrating pipe (23) at both ends of the annular shock-absorbing rubber pad (22).

3. A multi-layer sound insulation wall according to claim 2, characterized in that: One of the pipe sleeves (25) is fixedly connected to a side of the concrete structure wall (1) away from the multiple sound insulation structure via an expansion screw (26), and the other of the pipe sleeves (25) is fixedly connected to the fifth gypsum board layer (15), the third sound insulation felt (14), the fourth gypsum board layer (13), the second sound insulation felt (12), the third gypsum board layer (11), and the second C-shaped light steel main keel (8) via a fourth self-tapping screw (27).

4. The multi-layer sound insulation wall according to claim 1, characterized in that: A strip-shaped shock-absorbing rubber pad (28) is provided between one end of the multiple sound insulation structure and the inner wall at the inner corner of the concrete structure wall (1).

5. The multi-layer sound insulation wall according to claim 1, characterized in that: A shock-absorbing hanging code (18) is provided between the second C-shaped light steel main keel (8) and the second gypsum board layer (7); a mounting plate of the shock-absorbing hanging code (18) is fixedly connected to the second gypsum board layer (7) via a third self-tapping screw (19); and a shock-absorbing end of the shock-absorbing hanging code (18) is fixedly connected to the second C-shaped light steel main keel (8) via a clamp (20).

6. The multi-layer sound insulation wall according to claim 1, characterized in that: The lower ends of the plurality of first C-shaped light steel main keels (2) and the lower ends of the plurality of second C-shaped light steel main keels (8) are fixedly connected to a C-shaped light steel bottom extension keel (21), and the bottom of the C-shaped light steel bottom extension keel (21) is fixedly connected to the floor structure at the bottom of the concrete structural wall (1).

7. The multi-layer sound insulation wall according to claim 1, characterized in that: The second gypsum board layer (7), the first sound insulation felt (6) and the first gypsum board layer (5) are fixedly connected to the first C-shaped light steel main keel (2) via a first self-tapping screw (16), and the fifth gypsum board layer (15), the third sound insulation felt (14), the fourth gypsum board layer (13), the second sound insulation felt (12) and the third gypsum board layer (11) are fixedly connected to the second C-shaped light steel main keel (8) via a second self-tapping screw (17).