Structure and method for improving air sound insulation performance of light wall for fabricated building

Abstract

The present application belongs to the technical field of sound insulation of fabricated buildings, and specifically relates to a structure and method for improving the air sound insulation performance of a lightweight wall for a fabricated building, and specifically comprises: adding an elastic damping cushion layer, a sound insulation damping rubber layer or a metal damping keel on both sides of a lightweight wall framework; applying double-layer wall panels; filling glass wool or rock wool inside; treating the butt joint of the wall panels; applying a window with a sound insulation amount greater than 75% of the sound insulation amount of the wall; and setting an elastic damping rubber cushion layer around the window. The air sound insulation performance of the wall is tested and the sound insulation grade is evaluated. By not changing the conventional structure of the lightweight wall framework, the air sound insulation performance of the conventional lightweight wall is improved in the full frequency band, and measures for improving the sound insulation performance of the wall containing the window are proposed in view of the conventional window in the wall as a whole sound insulation short board. The present application ensures the advantages of high assembly efficiency, convenient and fast prefabrication, simple construction and low cost of the lightweight wall, and significantly improves the air sound insulation performance of the lightweight wall.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of prefabricated building sound insulation, and specifically relates to a light wall air sound insulation performance improvement structure and method for prefabricated buildings. BACKGROUND

[0002] A building industry carbon emission report released by the China Building Energy Efficiency Association (CABEE) in December 2022 shows that the total carbon emissions of the building and construction industry in China in 2020 reached 508 million tons, accounting for 50.9% of the country's carbon emissions, of which the production of traditional building materials such as steel and cement emitted 270 million tons. Traditional building materials are all derived from non-renewable resources, have high energy consumption and heavy pollution, exacerbating energy and resource consumption and environmental pollution, hindering the sustainable development of China's economy and society, and limiting the effective implementation of the dual-carbon strategy goal of "carbon peak and carbon neutrality". In recent years, the General Office of the State Council has successively issued a series of documents such as "Guiding Opinions on Vigorously Developing Prefabricated Buildings" (Guofa

[2016] No. 71) and "Opinions on Promoting the Sustainable and Healthy Development of the Construction Industry" (Guofa

[2017] No. 19), encouraging various regions to develop prefabricated buildings in accordance with local conditions. Prefabricated buildings are buildings that are assembled and connected on the construction site using parts and components produced in factories, mainly including prefabricated concrete, steel structure and modern wood structure buildings. In addition to the advantages of significantly reducing energy resource consumption during construction, reducing environmental pollution during construction, improving labor productivity and quality and safety levels, and promoting the formation of new industries, prefabricated buildings also have the advantages of environmental protection, energy saving, sustainability, good seismic performance, flexible design, and easy modification. Therefore, vigorously developing and scaling the application of prefabricated buildings is an important path for the high-quality development of the construction industry and the realization of China's dual-carbon strategy goal.

[0003] Prefabricated buildings generally require lightweight and high-strength parts and components, but the light-weight walls commonly used in prefabricated buildings have the industry-wide technical problem of insufficient air sound insulation performance, which makes it difficult to meet the functional requirements of people's work and life for environmental comfort. The poor air sound insulation performance of light-weight walls is a key technical bottleneck that limits the high-quality development and application of prefabricated buildings in China. Prefabricated buildings form a partition between spaces in the horizontal direction with wall structures, therefore, the air sound insulation performance of the walls is the key to the privacy of prefabricated buildings. According to the current national standard "Design Specification for Sound Insulation of Civil Buildings" (GB 50118-2010), the basic sound insulation requirements of most building walls need to meet a sound insulation value of ≥45 dB, while the air sound insulation value of conventional light-weight walls is generally <40 dB.

[0004] With the rapid development of China's economy and society and the continuous improvement of people's living standards, people have put forward more stringent requirements for the comfort of building living and use, especially the requirements for the sound environment. Noise, as one of the three major pollutions, long-term noise pollution will adversely affect people's physical and mental health, and even cause irreversible damage to the body. The current national standard "Design Code for Sound Insulation of Civil Buildings" (GB 50118-2010) makes clear provisions for the air sound insulation performance requirements of the external walls and partition walls in different building types including residential buildings, hospitals, hotels, etc. as shown in Table 1.

[0005] Table 1 Sound insulation performance standards of walls in different building types

[0006]

[0007]

[0008] The foundation structure of the light wall commonly used in the current fabricated building engineering is mostly double-layer light wallboard structure, which is wall panel / wall skeleton / wall panel. The wall skeleton is single-layer dimensional lumber designed side by side, and the cavity inside the wall skeleton is filled with thermal insulation material to achieve wall thermal insulation and sound insulation. However, the light wall structure of this structure has obvious insufficient sound insulation performance in actual use, resulting in low spatial privacy of building users. There are two obvious sound insulation valleys in the air sound insulation spectrum measurement curve of the conventional structure light wall, and three obvious sound insulation defects such as resonance effect, matching effect and sound bridge are the main factors of the air sound insulation performance of the light wall. In the sound transmission process, when the incident frequency of the sound wave is consistent with the natural frequency of the wall, resonance of the wall will occur, which will cause a large amount of sound energy transmission and reduce the sound insulation performance of the wall. This process is resonance effect. When the sound wave is incident at an angle, the wall panel will produce forced bending vibration under the excitation of oblique incident sound wave. When the forced bending wave propagation speed of the wall panel is consistent with the free bending wave propagation speed of the wall panel, the matching effect will occur, which will also cause a large amount of sound energy transmission and reduce the sound insulation performance of the wall. Although resonance effect and matching effect are both caused by wall vibration, which causes a large amount of sound energy transmission and greatly reduces sound insulation, there are substantial differences between the two. First, the frequency affected by the two is different. The frequency affected by matching effect occurs in the medium and high frequency range and is not unique, while resonance only occurs in the low frequency range. Second, matching effect is independent of the boundary conditions of the wall, but resonance is affected by the boundary conditions. Due to the structural characteristics of the conventional light wood structure wall, the wall panel is directly fixed with the wall skeleton, and the sound propagation speed in the medium is: solid > liquid > gas, so the sound bridge bottleneck of the conventional structure light wall is prominent, which causes a large amount of sound transmission and weakens the elastic effect of the air layer in the cavity of the wall, resulting in the reduction of the overall sound insulation performance of the wall. In addition, the existence of holes in the wall, such as junction boxes, window holes and door holes, will further reduce the sound insulation performance of the wall. At present, the sound insulation performance of the window commonly used in actual building engineering is much lower than that of the overall sound insulation performance of the wall, which becomes the short board of the sound insulation performance of the wall. At the same time, in order to shorten the construction period, there are problems such as poor construction quality and incomplete material filling in the installation of the window in most buildings, which reduces the thermal insulation performance, air tightness, waterproof performance and sound insulation performance of the building.

[0009] The sound insulation performance of lightweight wall can be improved by increasing the wall thickness, using high sound insulation wall panels, introducing sound absorption or insulation super materials or structures, changing the internal filling material of the wall, etc. These measures are commonly used in current prefabricated building engineering and most researches. However, these measures have some shortcomings in practical engineering applications. First, increasing the wall thickness or using high sound insulation wall panels will significantly increase the cost per unit area of the wall and reduce the actual usable area of the building. At the same time, the high sound insulation wall panels on the market are "sandwich" layered organic materials with high-density damping materials inside. They have large thickness, high density, weak fire resistance, and using a large amount of them will significantly increase the weight of the wall and increase the fire safety hazard. The use of sound absorption or insulation super materials or structures will increase the material cost and complicate the structure, making it difficult to achieve factory prefabrication and large-scale application. The inorganic filling material in the internal cavity of the wall is replaced by polyurethane foam and other organic materials, but this material is flammable and reduces the fire resistance of the wall, increasing the fire safety hazard and not meeting the current national standard for non-combustible filling materials in the wall.

[0010] The patent "A sound and heat insulation wood-plastic integrated frame shear wood wall" with application number 201810138311.2 reports that multiple wood-plastic wall columns with a spacing of 600 mm are fixed in a glued wood frame. The wood-plastic wall column is PE wood-plastic with a cross-sectional size of 40x90 mm and a wall thickness greater than 7 mm. The glued wood frame is filled with glass fiber cotton with a thickness greater than 20 mm between the wood-plastic wall columns. The outside of the wood-plastic wall column is sequentially a directional structure shaving board with a thickness of ≥12 mm, a 25 mm thick sound-absorbing cotton strip, a breathing paper, and an outer hanging board. The inside is sequentially a moisture-proof film, a gypsum board, and an inner wall board. The outer hanging board is a 20 mm thick wood-plastic board, and the inner wall board is a 5 mm thick wood-plastic board. The total thickness of the wall is 197 mm, and the air sound insulation performance of the wall is greater than 29 decibels. According to the current national standard "Design Specification for Sound Insulation of Civil Buildings" (GB 50118-2010), the air sound insulation level of this structure wall is lower than the second level, which cannot meet the minimum sound insulation requirements of the current national standard for application scenarios.

[0011] “Wooden Structure Wall Construction Details Influence on Its Sound Insulation Performance” in Journal of Beijing Forestry University, Vol. 29, No. 3, 2007, pp. 159-163, used different constructions to improve the air sound insulation performance of light wood walls. It used II class SFP profiles and 400 mm spacing to form a wood frame, and 12 mm thick gypsum board and oriented strand board on the inside and outside of the wood frame, respectively. The wood frame was filled with glass wool with a density of 12 kg / m3. When the wood column width in the wood frame was 89 mm and the spacing was 400 mm, the wall thickness was 113 mm, and the wall sound insulation performance was 41 dB. When the wood column width in the wood frame was 140 mm and the spacing was 400 mm, the wall thickness was 164 mm, and the wall sound insulation performance was 44 dB. According to the current national standard “Design Standard for Sound Insulation of Civil Buildings” (GB 50118-2010), the air sound insulation level of this structure wall is below the first level, and it is difficult to meet the requirements of most residential buildings that require wall sound insulation performance ≥ 45 dB.

[0012] “Experimental Study on Sound Insulation Performance of Green Building Double-leaf Lightweight Wall Structure” in Acoustical Technology, Vol. 40, No. 5, October 2021, pp. 657-662, conducted air sound insulation laboratory measurements on light steel keel composite walls. The two sides used single-layer 12 mm paper-faced gypsum board, and the middle frame was composed of 50×100 mm light steel keel. The lightweight wall was filled with 90 mm thick glass wool with a density of 10.5 kg / m3 in the cavity, and the wall thickness was 124 mm. The weighted sound insulation quantity was 45 dB, and after considering the pink noise spectrum correction coefficient, the wall air sound insulation quantity was difficult to reach 45 dB. According to the current national standard “Design Standard for Sound Insulation of Civil Buildings” (GB 50118-2010), the air sound insulation level of this structure wall is below the first level, and it is difficult to meet the requirements of most residential buildings that require wall sound insulation performance ≥ 45 dB.

[0013] “Experiment and Design Review of Sound Insulation of Light Steel Keel Thin Plate Partition Wall” in Noise and Vibration Control, Vol. 38, No. 1, February 2018, pp. 1-8, 15, describes a light steel keel composite wall with single-layer 16 mm thick paper-faced gypsum board on both sides, a light steel keel frame in the middle, a keel width of 92 mm, a thickness of 0.5 mm, and a spacing of 406 mm. The frame cavity was filled with 12 kg / m3 glass wool, and the wall thickness was 124 mm. The weighted sound insulation quantity was 44 dB, and after considering the pink noise spectrum correction coefficient, the sound insulation quantity was less than 45 dB. According to the current national standard “Design Standard for Sound Insulation of Civil Buildings” (GB 50118-2010), the air sound insulation level of this structure wall is below the first level, and it is difficult to meet the requirements of most residential buildings that require wall sound insulation performance ≥ 45 dB.

[0014] The article "Influence of elastic horizontal grooves and sound insulation felt on sound insulation performance of light wood structure wall" (Forestry Science, 2017, 42(6): 47-51) reported a wall with a wall skeleton composed of 12 mm single-layer gypsum board on both sides and 38×140 mm SPF lumber inside, with a spacing of 406 mm, and filled with 139 mm thick glass wool with a density of 12 kg / m3. The total thickness of the wall is 164 mm, and the weighted sound insulation is 40 dB. According to the current national standard "Design Standard for Sound Insulation of Civil Buildings" (GB 50118-2010), the air sound insulation level of this structural wall is lower than the second level, and it is difficult to meet the requirements of most residential buildings that the wall sound insulation performance should be ≥45 dB.

[0015] The article "Experimental study on sound insulation performance of wood-plastic building wall" (Wood Industry, 2018, 45(12): 16-21, 28) reported a wall with a wall skeleton composed of 38×89 mm SPF lumber, with 9.5 mm PVC wood-plastic board and 50 mm PE wood-plastic board on both sides, and filled with 50 mm thick glass wool in the cavity. The total thickness of the wall is 148.5 mm, and the weighted sound insulation is 30 dB. According to the current national standard "Design Standard for Sound Insulation of Civil Buildings" (GB 50118-2010), the air sound insulation level of this structural wall is lower than the second level, and it is difficult to meet the requirements of most residential buildings that the wall sound insulation performance should be ≥45 dB.

[0016] The patent "Adjustable double Helmholtz resonance light wood wall" (Application No. 201922240285.7) reported a light wood structure wall: a double Helmholtz resonance structure is introduced on one side to realize the regulation and absorption of low-frequency sound waves, thereby increasing the sound absorption and noise reduction measures of the wall. The structure is a wall panel with several cavity bodies on one side, with an opening on one side and a closed side. The opening end is connected to a perforated plate, and the center of the through hole of the perforated plate must be located on the center axis of the cavity body. This structure improves the low-frequency sound insulation capacity of the wall to some extent, but its structure is slightly complex, making it difficult to achieve rapid prefabrication in the factory, and the installation accuracy of the resonance cavity body and the perforated plate is relatively high, which hinders rapid prefabrication and construction.

[0017] The patent "Light wood structure wall" (Application No. 201922240285.7) reported a light wood structure wall, which consists of a basic wall frame composed of three panels and two skeletons. The skeletons are respectively provided with sound insulation felt and sound insulation foam and wave plates to play the role of sound insulation and sound absorption. The wall is relatively complex in structure, and the prefabrication and construction procedures are complicated. Moreover, multiple sound insulation and absorption materials are used, increasing the production cost of the wall, and the materials used are organic materials, increasing the fire hazard of the wall.

[0018] The patent with application number 201721746761.7 "A light fireproof sound insulation wall" reports a light wall, the wall skeleton is light steel keel, both sides are composite sound insulation board, the cavity is filled with polyester fiber sound absorbing cotton; the composite sound insulation board is composed of inner and outer fireproof glass magnesium board and middle sandwich damping sound insulation felt, the wall panel used in the wall is a sandwich structure, the use cost is high, and the internal sound insulation felt is a high-density rubber product, which has fire hazard, the composite sound insulation board has high bulk density, which increases the weight of the wall as a whole; the wall is filled with polyester fiber sound absorbing cotton, which does not comply with the relevant provisions of the current standard that the wall is filled with non-combustible materials.

[0019] The present application aims at the following three problems:

[0020] (1) The light wall with conventional structure in the actual project is difficult to meet the use requirement of the sound insulation performance of the wall ≥45dB in most application scenarios required by the current national standard "Code for Design of Civil Buildings" (GB 50118-2018).

[0021] (2) The light wall with conventional structure has three major sound insulation defects in the actual application of air sound insulation: low-frequency resonance effect, kiss effect and sound bridge, and the sound insulation loss caused by the difficulty in guaranteeing the construction quality of the building window body, the existence of the five defects greatly weakens the sound insulation performance of the light wall. The measures taken in the existing research or engineering do not fully solve the problem.

[0022] (3) The existing sound insulation performance improvement measures of most light walls have high construction cost, excessive wall thickness, difficulty in realizing factory prefabrication and engineering application, or increase fire hazard and other costs, and are difficult to meet the application requirements of high sound insulation grade in actual engineering, therefore, it is urgent to develop a light wall air sound insulation performance improvement structure and method for prefabricated buildings to solve the above problems. SUMMARY

[0023] According to the above three main technical problems existing in the light wall, the purpose of the present application is to provide a light wall air sound insulation performance improvement structure and method for fabricated buildings, which starts from the basic structure of two kinds of walls, adds sound insulation improvement measures on the surface of the wall skeleton without changing the basic structure, changes the solid sound bridge form of the wall panel / wall column / wall panel existing in the conventional light wall into an elastic connection sound bridge with damping and shock absorption effect, and greatly reduces the area of the point sound bridge form of the rigid sound bridge; and further changes the original resonance system of the wall to form a new "mass-air-mass" resonance system, moves the low-frequency "resonance sound insulation valley" to a lower frequency, and suppresses the existence of the fitting effect; on the basis of the original components of the conventional wall, the higher standard use is carried out, and the details of the original components are processed, so that the air sound insulation performance of the wall is improved in the full frequency band, and the original sound insulation short board is supplemented.

[0024] In order to achieve the above purpose, the present application provides the following technical scheme:

[0025] The light steel connecting structure of the light steel keel skeleton, the light steel keel skeleton is provided with metal damping keel, compressed glass wool strip, inner layer covering panel and outer layer covering panel on both sides of the light steel keel skeleton;

[0026] The light steel keel skeleton cavity is filled with glass wool or rock wool;

[0027] The metal damping keel is installed on the right side of the light steel keel skeleton along the light steel keel from top to bottom in equal intervals, and the covering panel on the right side of the metal damping keel is connected with the metal damping keel by means of galvanized self-tapping screw;

[0028] The thickness of the compressed glass wool strip or rock wool strip is 10mm, and it is arranged only at the cross section of the light steel keel on the left side of the light steel keel frame, and the inner layer covering panel and the outer layer covering panel on the left side of the compressed glass wool strip or rock wool strip are connected with the light steel keel skeleton by means of galvanized self-tapping screw penetrating the compressed glass wool strip or rock wool strip.

[0029] The light wall air sound insulation performance improvement structure method for fabricated buildings, specifically comprising the following steps:

[0030] A1, elastic damping and damping pad, sound insulation damping and damping rubber layer or metal damping keel are added on both sides of the wall skeleton of the conventional light wood structure shear wall or light steel keel composite wall; the elastic damping and damping pad specifically includes elastic damping and damping rubber pad and compressed glass wool strip or rock wool strip, and the thickness is 10mm; the elastic damping and damping rubber pad is a flame-retardant grade B1 industrial grade elastic rubber plate, which is applied between the covering structure plate of the light wood structure shear wall and the wall skeleton, and is arranged only at the section of the wall skeleton profiled material, and the width is equal to the section width of the wall column;

[0031] A2, the sound insulation damping rubber layer is laid on the surface of the wall skeleton, the thickness range is 5mm-10mm, and temporary fixation is performed by shooting nails. The shooting nails require that the structure plate, the sound insulation damping rubber layer and the wall skeleton are structurally connected by penetrating the sound insulation damping rubber layer through the nail nodes.

[0032] A3, the compressed glass wool or rock wool is applied between the light steel keel type composite wall covering panel and the wall skeleton, and is arranged only at the wall skeleton section, with a width of 2 times the height of the light steel keel section. The wall panel, the compressed glass wool or rock wool and the wall skeleton are structurally connected by penetrating the compressed glass wool or rock wool through the nail nodes.

[0033] A4, the butt joint gap width of the wall panel ranges from 3mm to 6mm, and the butt joint gaps of the double-layer wall panel are staggered. The butt joint gap of the wood-based structural panel is filled, compacted and smoothed by using special structural glue.

[0034] A5, a system window whose own air sound metering sound insulation quantity is greater than 75% of the weighted sound insulation quantity of the wall to be installed is used. When the window hole is installed in the reserved wall, an elastic rubber pad is used to seal the four sides of the window.

[0035] Preferably, in A1, the shooting nail length ranges from 30mm to 50mm, the maximum length is less than the sum of the thickness of the elastic rubber pad and the width of the wall column, the nail head section should be lower than or sunk into the surface of the elastic rubber pad, and the structure plate, the elastic damping rubber pad and the wall skeleton are structurally connected by penetrating the elastic damping rubber pad through the nail nodes.

[0036] Preferably, in A1, the metal damping keel is pressed from stainless steel sheets with a thickness of 0.6-1mm, and includes a horizontal short edge, a vertical short edge, an oblique long edge, a vertical long edge and an oblique short edge, and the edges are sequentially connected.

[0037] Preferably, in A1, after the wall skeleton, the metal damping keel and the wall panel are connected, an air gap is formed in the plane where the metal damping keel is located. The air gap is sealed by fire-resistant plaster strips (12) at the edge column or edge keel of the wall skeleton. After sealing, the gap around the wall is filled with a flame-retardant material with a flame-retardant level of ≥B1.

[0038] Preferably, the thickness of the fire-resistant plaster strip is less than the vertical distance between the vertical short edge and the vertical long edge of the metal damping keel, the width is equal to the width of the edge column or edge keel, and the length is equal to the distance between the two metal damping keels. The fire-resistant plaster strip is connected to the edge column or edge keel by galvanized self-tapping screws.

[0039] Preferably, in A1, the internal cavity is filled with glass wool with a surface density of ≥32kg / m2 Or fill rock wool, density ≥ 100 kg / m 3 No gap.

[0040] Preferably, the butt joint of the gypsum board in A4 is filled and smoothed in three steps using caulking paste and caulking air-permeable paper:

[0041] First, apply caulking paste with a width of ≥ 100 mm centered on the butt joint;

[0042] Second, cover the surface of the caulking paste with a caulking air-permeable paper strip with a width of ≥ 100 mm centered on the butt joint;

[0043] Third, apply caulking paste with a width of ≥ 200 mm centered on the butt joint on the surface of the caulking air-permeable paper.

[0044] Preferably, the system window frame is a broken bridge aluminum plastic profile, and the opening mode is a flat opening.

[0045] Preferably, an elastic damping rubber pad layer with a thickness range of 5-10 mm is pre-laid on the surface of the wall window opening, and then the window is installed and fixed using the matching hardware kit of the system window. After installation, the joints are filled with foaming material or cement mortar.

[0046] Compared with the prior art, the beneficial effects of the present application are:

[0047] The technical solution proposed in the present application does not change the basic structure of the conventional construction light wood and light steel wall, only adds a sound insulation improvement assembly on the surface of the basic wall skeleton, improves the application standard of the original assembly based on the original assembly of the two walls, and provides a solution for the details that affect the sound insulation performance of the wall. The designed technical content does not change the assembly type and functional integration of the wall, and all installation processes of the wall can be completed in the factory, has a very high assembly efficiency, and the material cost of the improved wall does not increase more than 10% of the conventional construction light wall. On the basis of the original light wall production line, it can be completed without changing the production line, and has very high engineering application value. The metal damping keel and the elastic pad layer are all commercially available engineering products, which are easy to obtain and manufacture. The installation of these materials in the wall does not have complex and delicate requirements, which is convenient for actual operation and meets the actual situation of engineering application. And the technical solution for applying the window to the wall has a constructive effect on the window-containing wall meeting the design sound insulation requirements. The improved light wall has improved air sound insulation in all frequency bands, and the comprehensive sound insulation performance meets the use requirements of most building walls in the current national standard "Sound Insulation Design Specification for Civil Buildings" (GB 50118-2018). BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0049] Figure 1 It is a schematic diagram of a light steel keel type composite wall structure.

[0050] Figure 2 It is a schematic diagram of a light steel keel type composite wall local plan view.

[0051] Figure 3 It is a schematic diagram of a light steel keel type composite wall local left view.

[0052] Figure 4 It is a schematic diagram of a metal damping keel section.

[0053] Figure 5 It is a schematic diagram of a light steel keel type composite wall. Figure 3 It is a schematic diagram of a light steel keel type composite wall.

[0054] Figure 6 It is a schematic diagram of a light wood structure shear wall local structure.

[0055] Figure 7 It is a schematic diagram of a light wood structure shear wall wall skeleton.

[0056] In the figure: 1-light steel keel skeleton, 2-metal damping keel, 3-compressed glass wool strip, 4-inner covering panel, 5-outer covering panel, 6-glass wool, 7-metal damping keel transverse short side, 8-metal damping keel vertical short side, 9-metal damping keel oblique long side, 10-metal damping keel vertical long side, 11-metal damping keel oblique short side, 12-fire-resistant gypsum board strip, 13-light wood wall skeleton, 14-structural panel, 15-elastic damping cushion layer, 16-system window. DETAILED DESCRIPTION

[0057] In order to make those skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0058] Taking a light steel keel type composite wall as an example, the light wood structure shear wall implementation process is the same as that of the light steel keel type composite wall. Please refer to Figures 1-5 The technical solution provided by the present application: the air sound insulation performance improvement structure of the light wall for fabricated buildings, specifically comprises:

[0059] The light steel keel connection constitutes a light steel keel framework 1, both sides of the light steel keel framework 1 are respectively provided with a metal damping keel 2, a compressed glass wool strip 3, an inner layer covering panel 4 and an outer layer covering panel 5, and the cavity of the light steel keel framework 1 is filled with glass wool 6; the metal damping keel 2 is installed at the right side of the light steel keel framework 1 in equal intervals from top to bottom along the light steel keel, and the covering panel at the right side of the metal damping keel 2 is connected with the metal damping keel 2 by means of galvanized self-tapping screws; the compressed glass wool strip 3 has a thickness of 10 mm and is arranged only at the cross section of the light steel keel at the left side of the light steel keel framework 1, and the inner layer covering panel 4 and the outer layer covering panel 5 at the left side of the compressed glass wool strip 3 are connected with the light steel keel framework 1 by penetrating the compressed glass wool strip 3 with galvanized self-tapping screws.

[0060] The method for improving the air sound insulation performance of a light wall body for a fabricated building, and the improvement structure specifically comprises the following steps:

[0061] A1. Adding an elastic damping damping pad layer, a sound insulation damping damping rubber layer or a metal damping keel on both sides of a light wood structure shear wall or a light steel keel type composite wall body wall body framework in a conventional structure; the elastic damping damping pad layer specifically includes an elastic damping damping rubber pad layer and a compressed glass wool strip, both having a thickness of 10 mm, the elastic damping damping rubber pad layer is a flame-retardant grade B1 industrial grade elastic rubber plate, is applied between a light wood structure shear wall covering structure plate and a wall body framework, is arranged only at a wall body framework dimensional material cross section, has a width equal to the cross section width of a wall column, and is internally filled with glass wool or rock wool;

[0062] A2. The sound insulation damping damping rubber layer is laid flat on the surface of the wall body framework, has a thickness in the range of 5mm to 10mm, is temporarily fixed by shooting nails, the shooting nails require that the nails penetrate the sound insulation damping damping rubber layer to form a structural connection of the structure plate, the sound insulation damping damping rubber layer and the wall body framework;

[0063] A3. The compressed glass wool strip is applied between a light steel keel type composite wall body covering panel and a wall body framework, is arranged only at a wall body framework cross section, has a width of 2 times the cross section height of the light steel keel, and forms a structural connection of the wall panel, the compressed glass wool strip and the wall body framework by penetrating the compressed glass wool strip with a nail node;

[0064] A4. The wall panel butt joint seam has a width in the range of 3mm to 6mm, and the butt joint seams of double-layer wall panels are arranged alternately, wherein the butt joint seam of a wood-based structure plate is filled, compacted and smoothed with a special structural adhesive;

[0065] A5. A system window with an air sound metering sound insulation greater than 75% of the sound insulation of a wall body to be installed is applied; an elastic rubber pad layer is used to seal the four sides of the window body when the window body is installed in a reserved wall body installation window opening.

[0066] Preferably, the metal damping keel is pressed from stainless steel sheet with thickness of 0.6-1mm, comprising a horizontal short edge 7, a vertical short edge 8, an oblique long edge 9, a vertical long edge 10 and an oblique short edge 11, which are connected in sequence, with length ratio of 1:2:2:3:1, and the angle between the two oblique edges and the vertical edges is 120°, and the oblique long edge and the oblique short edge are opposite; the arrangement interval of the metal damping keel is not more than 600mm; the metal damping keels 2 on the top and bottom of the light steel keel framework 1 are arranged oppositely, the horizontal short edge 7 is flush with the top and bottom of the light steel keel framework 1, the vertical short edge 8 is connected with the light steel keel framework 1 by special dovetail self-tapping screws, the interval of the connecting screws is the interval of the vertical keels, and the connecting screws around the wall framework are densely arranged; the vertical long edge 10 is connected with the inner and outer cover panels 4 and 5 by galvanized self-tapping screws, and the interval of the connecting screws is 200mm and 150mm respectively.

[0067] Preferably, after the light steel keel framework 1, the metal damping keel 2 and the inner cover panel 4 are connected, the plane where the metal damping keel 2 is located will form an air gap, the air gap is blocked by fire-resistant plaster strips 12 at the edge keel of the framework, and the gaps around the wall after blocking are filled with flame-retardant foam material with a flame-retardant level of ≥B1.

[0068] Preferably, the thickness of the fire-resistant plaster strip 12 is less than the vertical distance between the vertical short edge 8 and the vertical long edge 10 of the metal damping keel, the width is equal to the width of the edge keel column or edge keel, and the length is equal to the interval between the two metal damping keels 2. The fire-resistant plaster strip 12 is connected with the edge keel by galvanized self-tapping screws.

[0069] Preferably, the width of the compressed glass wool strip 3 is twice the height of the light steel keel section.

[0070] Preferably, the surface density of the glass wool filled in the cavity is ≥32kg / m 2 , or rock wool is filled, with a density of

[0071] ≥100kg / m 3 .

[0072] Preferably, the width of the cover panel butt joint is in the range of 3mm-6mm, and the butt joints of the inner and outer cover panels are staggered; the cover panel butt joint is filled and smoothed in three steps by using caulking paste and caulking breathable paper tape:

[0073] First step, apply caulking paste with a width of ≥100mm centered on the butt joint;

[0074] Second step, cover the caulking breathable paper tape on the surface of the caulking paste in the first step, with a width of ≥100mm centered on the butt joint;

[0075] Third step, apply caulking paste with a width of ≥200mm on the surface of the caulking breathable paper tape centered on the butt joint.

[0076] The specific implementation method is described by taking a light steel keel type composite wall with a size of 2400x2400mm (widthxheight) as an example. The light steel keel type composite wall is composed of light steel keel framework, glass wool, metal damping keel, compressed glass wool strip, fire-resistant gypsum board and other components, and the installation process is as follows: wall frame assembly, compressed glass wool strip arrangement, left side fire-resistant gypsum board installation, wall cavity filling with glass wool, metal damping keel installation, fire-resistant gypsum board strip plugging, right side fire-resistant gypsum board installation.

[0077] The light steel keel type composite wall uses U-shaped and C-shaped light steel keels with a cross-sectional size of 40x75x0.6mm (heightxwidthxthickness) for assembly, with the U-shaped light steel keel as the top and bottom keels, and the C-shaped light steel keel as the side column and vertical keel, with a center distance of 600mm between the vertical keels to form an integrated framework of the assembled integrated light wall, and the screws are flat head lightning self-tapping screws from Shanghai Meigu brand with a diameter of 4.2mm and a length of 16mm.

[0078] The compressed glass wool strip with a thickness of 10mm and a width of 80mm is laid flat on the left side of the light steel keel cross section.

[0079] The fire-resistant gypsum board on both sides of the wall framework is 12mm thick, and the left side of the compressed glass wool strip is installed with fire-resistant gypsum board: the inner layer of fire-resistant gypsum board is composed of three fire-resistant gypsum boards, and the assembly sequence from one side of the wall is 600x2400mm (widthxheight), 1200x2400mm (widthxheight), and 600x2400mm (widthxheight), with a 3mm joint gap between each fire-resistant gypsum board, which is filled and smoothed in three steps using jointing paste and jointing breathable paper tape:

[0080] First, apply jointing paste with a width of ≥100mm centered on the joint;

[0081] Second, cover the jointing breathable paper tape with a width of ≥100mm centered on the jointing paste surface in the previous step;

[0082] Thirdly, the caulking paste with a width of more than 200 mm is applied to the surface of the embedded joint, the compressed glass wool is connected with the wall skeleton by using the drywall nails with a size of 3.5 mm*35 mm, and the connection interval is 200 mm at the four sides of the wall and 400 mm at the middle of the wall; the outer layer of the fire-resistant gypsum board is composed of two fire-resistant gypsum boards with a size of 1200 mm*2400 mm, and a 3 mm joint is left between the two fire-resistant gypsum boards, the joint is filled in the above-mentioned manner, the compressed glass wool is connected with the wall skeleton by using the drywall nails with a size of 3.5 mm*50 mm, and the connection interval is 150 mm at the four sides of the wall and 300 mm at the middle of the wall.

[0083] The cavity of the wall skeleton is filled with the glass wool with a thickness of 75 mm and a surface density of 32 kg / m 2 , or the rock wool with a density of more than 100 kg / m 3 .

[0084] The metal damping batten is made of the galvanized iron sheet with a thickness of 1 mm, is arranged horizontally at the right side of the wall skeleton with a spacing of 600 mm, is connected with the wall skeleton by using the drywall nails with a size of 3.5 mm*25 mm in the vertical short side, and the nail interval is 600 mm, the joint at the edge column is connected by using two drywall nails, the joint at the other internal wall columns is connected by using one drywall nail, the metal damping battens at the top and the bottom of the wall skeleton are arranged oppositely, the transverse short side is flush with the top and the bottom of the wall skeleton, and the connection screws are dense.

[0085] Before the fire-resistant gypsum board is installed on the side of the metal damping batten, the gap formed by the metal damping batten at the edge column is sealed, the sealing is performed by using the fire-resistant gypsum board strip with a size of 12 mm*40 mm (thickness* width), the fire-resistant gypsum board strip is fixed on the edge batten by using the drywall nails with a size of 3.5 mm*25 mm, and the gap at the four sides of the wall is sealed by using the polyurethane foam material after the sealing.

[0086] The vertical long side of the metal damping batten is connected with the fire-resistant gypsum board, the specifications of the inner and outer layers of the fire-resistant gypsum board and the filling manner of the joint are as described above, the metal damping batten is connected with the inner layer of the fire-resistant gypsum board by using the drywall nails with a size of 3.5 mm*25 mm, the connection interval is 200 mm, and the metal damping batten is connected with the outer layer of the fire-resistant gypsum board by using the drywall nails with a size of 3.5 mm*35 mm, the connection interval is 150 mm.

[0087] The application will be described in detail below by combining the control examples and the embodiments.

[0088] Control example:

[0089] A comparative example of the structure and method for improving the airborne sound insulation performance of lightweight walls in prefabricated buildings is a conventional lightweight wood wall structure used in prefabricated wood structure construction projects. It employs SPF lumber of grade II, with dimensions of 38mm × 89mm (thickness × width), connected by nail joints to form a wood frame. The top beams and side ribs of the wood frame are double-layered, while the bottom beams and internal wall ribs are single-layered, with a rib spacing of 400mm. The cavity of the wall frame is filled with glass wool with a surface density of 32kg / m³. Both sides of the wall frame are covered with a single layer of oriented strand board (OSB) and a single layer of fire-resistant gypsum board, each 12mm thick. The wall assembly requirements fully comply with the current national standard "Standard for Design of Timber Structures" (GB).

[0090] The measurements were conducted in accordance with the provisions of GB / T 19889.3-2005. Based on the current national standard "Acoustic Measurement of Building and Building Components - Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Components" (GB / T 19889.3-2005), the airborne sound insulation of the wall structure was measured in a laboratory. The test data were processed according to the current national standard "Standard for Evaluation of Building Sound Insulation" (GB / T50121-2005). The results show that the weighted sound insulation of the conventionally constructed balsa wood wall is 37 dB, and the airborne sound insulation after pink noise spectrum correction is 32 dB. This wall does not meet the usage requirements for most building walls in the current national standard "Code for Sound Insulation Design of Civil Buildings" (GB 50118-2010).

[0091] Example 1:

[0092] A structure and method for improving the airborne sound insulation performance of lightweight walls in prefabricated buildings are disclosed. The lightweight wall structure uses SPF (Surface Mount Fire) lumber of Grade II, measuring 38mm × 89mm (thickness × width), assembled into a wall frame using nails. The top beams and side columns of the frame are double-layered, while the bottom beams and internal wall columns are single-layered. The spacing between the wall columns is 406mm. The inner and outer sides of the wall frame are covered with a single layer of 12mm thick fire-resistant gypsum board and oriented strand board (OSB). A 10mm elastic damping rubber pad is placed between the OSB and the wall frame. The density of the filler material within the frame is 32kg / m³. 2 The glass wool is used to form a lightweight prefabricated building wall with dimensions of 2400mm×2400mm×123mm (width×height×thickness).

[0093] According to the provisions of the current national standard "Acoustics - Measurement of the sound insulation properties of buildings and of building elements - Part 3: Laboratory measurement of airborne sound insulation of buildings elements" (GB / T 19889.3-2005), the air sound insulation laboratory determination of the light wall structure is carried out, the obtained determination data is processed according to the method specified in the current national standard "Evaluation standard for sound insulation of buildings" (GB / T 50121-2005), and then the sound insulation grade of the light wall structure is evaluated according to the provisions of the current national standard "Code for design of sound insulation of civil buildings" (GB 50118-2010).

[0094] From the test results, the air-borne sound transmission loss of the lightweight wall in this embodiment is 45 dB, and the air-borne sound transmission loss after pink noise spectrum correction is 40 dB. According to the current national standard "Design Code for Sound Insulation of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of this structural wall is lower than the second level. Compared with the commonly used reference example wall in prefabricated buildings, the air-borne sound transmission loss of the lightweight wall in this embodiment is increased by 8 dB; compared with the 197mm thick wall in the patent technology of application number 201810138311.2 "Sound insulation and heat insulation wood-plastic integrated frame shear wood wall", the sound transmission loss of the product in this embodiment is increased by 16 dB; compared with the 164mm thick wall with the highest sound insulation performance (44dB) reported in "Influence of Wood Structure Wall Building Details on Its Sound Insulation Performance" in Journal of Beijing Forestry University, Vol. 29, No. 3, 159-163, 2007, the sound transmission loss of the product in this embodiment is increased by 1 dB. Compared with the 124mm thick lightweight wall reported in "Experimental Study on Sound Insulation Performance of Green Building Double-leaf Structure Lightweight Wall" in Acoustical Technology, Vol. 40, No. 5, 657-662, October 2021, the sound transmission loss of the product in this embodiment is increased by 0 dB. Compared with the 124mm thick lightweight steel keel composite wall described in "Experiment and Design Review of Sound Insulation between Lightweight Steel Keel Thin Plates" in Noise and Vibration Control, Vol. 38, No. 1, 1-8, 15, February 2018, the sound transmission loss of the product in this embodiment is increased by 1 dB. Compared with the 164mm thick lightweight wood wall reported in "Influence of Elastic Cross Groove and Soundproofing Felt on Sound Insulation Performance of Lightweight Wood Structure Wall" in Forestry Science and Technology, Vol. 42, No. 6, 47-51, 2017, the sound transmission loss of the product in this embodiment is increased by 5 dB. Compared with the 148.5mm thick wall reported in "Experimental Study on Sound Insulation Performance of Wood-Plastic Building Wall" in Forest Products Industry, Vol. 45, No. 12, 16-21, 28, 2018, the sound transmission loss of the product in this embodiment is increased by 15 dB. Compared with the patent technologies of application number 201922240285.7 "Adjustable Double-Helmholtz Resonance Lightweight Wood Wall", application number 201922240285.7 "Lightweight Wood Structure Wall", and application number 201721746761.7 "Lightweight Fireproof Soundproof Wall", the structure of this embodiment is simple, has modular wall components, and can achieve rapid transformation. The product can be produced on existing lightweight wall assembly production lines, and the wall production and installation do not require fine operation. It is suitable for the characteristics of rapid construction of prefabricated buildings; the materials used are low-cost and easily available; the wall filling material meets the relevant provisions of the current national standard.According to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010), the wall body of the example meets the air sound insulation performance requirements of the residential building for the indoor bedroom wall (≥35 dB), the indoor other compartment wall (≥30 dB), the partition wall between guest rooms in the hotel building (second level, ≥40 dB), and the partition wall between the guest room and the corridor (special level, ≥40 dB).

[0095] Example 2:

[0096] The structure and method for improving the air sound insulation performance of the light wall body for fabricated buildings. The structure of the light wall body uses SPF lumber with a size of 38 mm x 89 mm (thickness x width) and a grade of II to assemble the wall body framework by nailing. The top beam plate and the edge bone column in the framework are double-layer, the bottom beam plate and the internal wall bone column are single-layer, the wall bone column spacing is 406 mm, the inside and outside of the wall body framework are respectively covered with a single layer of fire-resistant gypsum board with a thickness of 12 mm and oriented strand board, a 10 mm elastic damping rubber pad layer is arranged between the oriented strand board and the wall body framework, a metal damping keel is installed between the fire-resistant gypsum board and the wall body framework with a spacing of 600 mm, and the framework cavity is filled with glass wool with a surface density of 32 kg / m 2 The final size of the light wall body for fabricated buildings is 2400 mm x 2400 mm x 138 mm (width x height x thickness).

[0097] According to the current national standard "Measurement of Sound Insulation of Buildings and Building Elements Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Elements" (GB / T 19889.3-2005), the air sound insulation laboratory determination of the structure of the light wall body is carried out, the obtained determination data is processed according to the method specified in the current national standard "Evaluation Standard for Building Sound Insulation" (GB / T 50121-2005), and then the sound insulation level of the structure of the light wall body is evaluated according to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010).

[0098] From the test results, the air-borne sound transmission loss of the lightweight wall in this embodiment is 46 dB, and the air-borne sound transmission loss after pink noise spectrum correction is 42 dB. According to the current national standard "Design Code for Sound Insulation of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of this structural wall is rated as level two. Compared with the commonly used reference example wall in prefabricated buildings, the air-borne sound transmission loss of the lightweight wall in this embodiment is improved by 9 dB; compared with the 197mm thick wall in the patent technology of application number 201810138311.2 "Sound and heat insulation wood-plastic integrated frame shear wood wall", the air-borne sound transmission loss of the product in this embodiment is improved by 17 dB; compared with the 164mm thick wall with the highest sound insulation performance (44dB) reported in "Influence of Wood Structure Wall Building Details on Its Sound Insulation Performance" in Journal of Beijing Forestry University, Vol. 29, No. 3, 159-163, 2007, the air-borne sound transmission loss of the product in this embodiment is improved by 2dB. Compared with the 124mm thick lightweight wall reported in "Experimental Study on Sound Insulation Performance of Green Building Double-leaf Structure Lightweight Wall" in Acoustics Technology, Vol. 40, No. 5, 657-662, October 2021, the air-borne sound transmission loss of the product in this embodiment is improved by 1dB. Compared with the 124mm thick lightweight steel keel composite wall described in "Experiment and Design Review of Sound Insulation between Lightweight Steel Keel Thin Plates" in Noise and Vibration Control, Vol. 38, No. 1, 1-8, 15, February 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 2dB. Compared with the 164mm thick lightweight wood wall reported in "Influence of Elastic Cross Groove and Soundproofing Felt on Sound Insulation Performance of Lightweight Wood Structure Wall" in Forestry Science and Technology, Vol. 42, No. 6, 47-51, 2017, the air-borne sound transmission loss of the product in this embodiment is improved by 6dB. Compared with the 148.5mm thick wall reported in "Experimental Study on Sound Insulation Performance of Wood-Plastic Building Wall" in Forest Products Industry, Vol. 45, No. 12, 16-21, 28, 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 16dB. Compared with the patent technologies of application number 201922240285.7 "Adjustable Double-Helmholtz Resonance Lightweight Wood Wall", application number 201922240285.7 "Lightweight Wood Structure Wall", and application number 201721746761.7 "Lightweight Fireproof Soundproof Wall", the structure of this embodiment is simple, has modular wall components, can realize rapid transformation, and can be produced on existing lightweight wall assembly production lines. The production and installation of the wall do not require fine operation, and are suitable for the characteristics of rapid construction of prefabricated buildings; the materials used are low in cost and easy to obtain; the wall filling material meets the relevant provisions of the current national standard.According to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010), the wall body of the example meets the air sound insulation performance requirements of the residential building for the indoor bedroom wall (≥ 35 dB), the indoor other compartment wall (≥ 30 dB), the partition wall between guest rooms in the hotel building (≥ 40 dB), and the partition wall between the guest room and the corridor (≥ 40 dB).

[0099] Example 3:

[0100] The structure and method for improving the air sound insulation performance of the light wall body for fabricated buildings, the light wall body adopts SPF specification material with a grade of II and a size of 38 mm x 89 mm (thickness x width) to be connected and assembled into a wall body framework by nailing, the top beam plate and the edge bone column in the framework are double-layer, the bottom beam plate and the internal wall bone column are single-layer, the wall bone column spacing is 406 mm, the inside of the wall body framework is covered with double-layer fire-resistant gypsum board with a thickness of 12 mm, the outside is covered with single-layer oriented strand board with a thickness of 12 mm, 10 mm elastic damping rubber pad layers are arranged between the oriented strand board and the wall body framework, metal damping keels are installed between the fire-resistant gypsum board and the wall body framework with a spacing of 600 mm, the framework cavity is filled with glass wool with a surface density of 32 kg / m 2 , and finally a light wall body for fabricated buildings with a size of 2400 mm x 2400 mm x 150 mm (width x height x thickness) is formed.

[0101] According to the current national standard "Measurement of Sound Insulation of Buildings and Building Elements Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Elements" (GB / T 19889.3-2005), the air sound insulation laboratory determination of the light wall body with the structure is carried out, the obtained determination data is processed according to the method specified in the current national standard "Evaluation Standard for Building Sound Insulation" (GB / T 50121-2005), and then the sound insulation grade of the light wall body with the structure is evaluated according to the provisions of the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010).

[0102] From the test results, the air-borne sound transmission loss of the lightweight wall in this embodiment is 51 dB, and the air-borne sound transmission loss after pink noise spectrum correction is 49 dB. According to the current national standard "Code for Sound Insulation Design of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of this structural wall is classified as first-class. Compared with the commonly used reference example wall in prefabricated buildings, the air-borne sound transmission loss of the lightweight wall in this embodiment is improved by 14 dB; compared with the 197mm thick wall in the patent technology of application number 201810138311.2 "Sound insulation and heat insulation wood-plastic integrated frame shear wood wall", the air-borne sound transmission loss of the product in this embodiment is improved by 22 dB; compared with the 164mm thick wall with the highest sound insulation performance (44dB) reported in "Influence of Wood Structure Wall Building Details on Its Sound Insulation Performance" in Journal of Beijing Forestry University, Vol. 29, No. 3, 159-163, 2007, the air-borne sound transmission loss of the product in this embodiment is improved by 7dB. Compared with the 124mm thick lightweight wall reported in "Experimental Study on Sound Insulation Performance of Green Building Double-leaf Structure Lightweight Wall" in Acoustical Technology, Vol. 40, No. 5, 657-662, October 2021, the air-borne sound transmission loss of the product in this embodiment is improved by 6dB. Compared with the 124mm thick lightweight steel keel composite wall described in "Experiment and Design Review of Sound Insulation between Lightweight Steel Keel Thin Plates" in Noise and Vibration Control, Vol. 38, No. 1, 1-8, 15, February 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 7dB. Compared with the 164mm thick lightweight wood wall reported in "Influence of Elastic Cross Groove and Soundproofing Felt on Sound Insulation Performance of Lightweight Wood Structure Wall" in Forestry Science and Technology, Vol. 42, No. 6, 47-51, 2017, the air-borne sound transmission loss of the product in this embodiment is improved by 11dB. Compared with the 148.5mm thick wall reported in "Experimental Study on Sound Insulation Performance of Wood-Plastic Building Wall" in Forest Products Industry, Vol. 45, No. 12, 16-21, 28, 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 21dB. Compared with the patent technologies of application number 201922240285.7 "Adjustable Double-Helmholtz Resonance Lightweight Wood Wall", application number 201922240285.7 "Lightweight Wood Structure Wall", and application number 201721746761.7 "Lightweight Fireproof Soundproof Wall", the structure of this embodiment is simple, has modular wall components, can realize rapid transformation, and can be produced on existing lightweight wall assembly production lines. The production and installation of the wall do not require fine operation, and are suitable for the characteristics of rapid construction of prefabricated buildings; the materials used are low-cost and easy to obtain; the wall filling material meets the relevant provisions of the current national standard.According to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010), the wall body of the embodiment meets the air sound insulation performance requirements of the following: residential buildings for separating walls (> 45dB), indoor bedroom walls (≥ 35dB), indoor other separating walls (≥ 30dB), ordinary classrooms in school buildings (> 45dB), separating walls between music classrooms and piano rooms (> 45dB), separating walls between operating rooms and noise generating rooms in hospital buildings (> 45dB), separating walls between patient rooms and between patient rooms and operating rooms (> 45dB), separating walls between examination rooms (> 40dB), separating walls between guest rooms in hotel buildings (first class > 45dB), separating walls between guest rooms and corridors (special class > 45dB), separating walls between offices, conference rooms and noise generating rooms in office buildings (low requirement standard > 45dB), and separating walls between offices, conference rooms and ordinary rooms (low requirement standard > 45dB).

[0103] Embodiment 4:

[0104] The structure and method for improving the air sound insulation performance of a light wall body for fabricated buildings. The light wall body is constructed by using SPF lumber with a size of 38mm x 89mm (thickness x width) and a grade of II to assemble a wall skeleton by nailing connection. The top beam plate and the edge skeleton column in the skeleton are double-layered, the bottom beam plate and the internal wall skeleton column are single-layered, the distance between the wall skeleton columns is 406mm, the inner side and the outer side of the wall skeleton are respectively covered with a single layer of fire-resistant gypsum board and oriented strand board with a thickness of 12mm, the skeleton is filled with glass wool with a surface density of 32kg / m 2 A system window with a width of 600mm and a height of 1000mm is provided in the middle of the wall body. The window is a two-glass hollow, broken bridge aluminum casement window with a weighted sound insulation of 33dB. The window frame is sealed with a polyurethane foaming agent. Finally, a light wall body for fabricated buildings with a size of 2400mm x 2400mm x

[0105] 113mm (width x height x thickness) is formed.

[0106] According to the current national standard "Acoustics - Measurement of the sound insulation properties of buildings and of building elements - Part 3: Laboratory measurement of airborne sound insulation of building elements" (GB / T 19889.3-2005), the air sound insulation laboratory of the light wall body is determined. The measured data is processed according to the method specified in the current national standard "Evaluation Standard for Building Sound Insulation" (GB / T 50121-2005), and the sound insulation grade of the light wall body is evaluated according to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010).

[0107] From the test results, the air-borne sound count-weighted sound insulation quantity of the lightweight wall in this embodiment is 39 dB, and the air-borne sound insulation quantity after pink noise spectrum correction is 36 dB. According to the provisions of the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of the wall is classified as first class. Compared with the commonly used reference wall in the prefabricated building with a complete wall surface, the air-borne sound count-weighted sound insulation quantity of the lightweight wall in this embodiment is improved by 2 dB. From the comparison, it can be concluded that the window with a count-weighted sound insulation quantity greater than 75% of the wall count-weighted sound insulation quantity is used in the wall, and the window is no longer a weak link in the sound insulation performance of the wall, and will not greatly reduce the sound insulation performance of the wall.

[0108] Embodiment 5:

[0109] The prefabricated building lightweight wall air-borne sound insulation performance improvement structure and method, the SPF size material with a level of II and a size of 38 mm x 89 mm (thickness x width) is used to assemble the wall framework by nailing, the top beam plate and the edge bone column in the framework are double-layer, the bottom beam plate and the internal wall bone column are single-layer, the wall bone column spacing is 406 mm, the inside of the wall framework is covered with double-layer fire-resistant gypsum board with a thickness of 12 mm, the outside is covered with single-layer oriented strand board with a thickness of 12 mm, a 10 mm elastic damping rubber pad layer is arranged between the oriented strand board and the wall framework, a metal damping batten is installed between the fire-resistant gypsum board and the wall framework with a spacing of 600 mm, the framework cavity is filled with glass wool with a surface density of 32 kg / m 2 A system window is installed in the middle of the wall, the window has a width of 600 mm and a height of 1000 mm, the window type is two-glass hollow and broken bridge aluminum casement window, the count-weighted sound insulation quantity of the window is 33 dB, a 5 mm thick elastic damping pad layer is arranged between the window frame and the hole, the width of the pad layer is the thickness of the window, and the window frame is finally filled with polyurethane foaming agent to form a prefabricated building lightweight wall with a size of 2400 mm x 2400 mm x 150 mm (width x height x thickness).

[0110] According to the provisions of the current national standard "Acoustics - Measurement of the sound insulation properties of buildings and of building elements - Part 3: Laboratory measurement of air-borne sound insulation of building elements" (GB / T 19889.3-2005), the air-borne sound insulation laboratory determination of the lightweight wall is carried out, the measured data is processed according to the method specified in the current national standard "Building sound insulation evaluation standard" (GB / T 50121-2005), and the sound insulation level of the lightweight wall is evaluated according to the provisions of the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010).

[0111] From the test results, the air-borne sound count-weighted sound insulation of the lightweight wall in this embodiment is 48dB, and the air-borne sound insulation after pink noise spectrum correction is 46dB. According to the provisions of the current national standard "Design Standard for Sound Insulation of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of this structural wall is classified as first class. Compared with the commonly used reference example wall in the prefabricated building with complete wall surface, the air-borne sound count-weighted sound insulation of the lightweight wall in this embodiment is improved by 11dB; compared with embodiment 3, the air-borne sound count-weighted sound insulation of the lightweight wall in this embodiment is only reduced by 3dB; from the above comparison, it can be concluded that the technical solution proposed in this patent can effectively improve the air-borne sound insulation performance of the wall.

[0112] Embodiment 6:

[0113] The lightweight wall for prefabricated buildings improves the air-borne sound insulation performance, which uses C-shaped light steel keel with a size of 75mm x 40mm x 0.6mm (width x height x thickness) as vertical keel and edge keel, uses U-shaped light steel keel with a size of 75mm x 40mm x 0.6mm (width x height x thickness) as top keel and bottom keel, the vertical keel spacing is 406mm, and the lightweight steel keel wall framework is formed by nailing connection. The wall framework is covered with double-layer fire-resistant gypsum board with a thickness of 12mm on both sides, the wall framework is filled with glass wool with a surface density of 32kg / m 2 , and finally a lightweight wall for prefabricated buildings with a size of 2400mm x 2400mm x 123mm (width x height x thickness) is formed.

[0114] According to the provisions of the current national standard "Measurement of Sound Insulation of Buildings and Building Elements Part 3: Laboratory Measurement of Air-borne Sound Insulation of Building Elements" (GB / T 19889.3-2005), the air-borne sound insulation of the lightweight wall is determined in the laboratory, the measured data is processed according to the method specified in the current national standard "Evaluation Standard for Building Sound Insulation" (GB / T 50121-2005), and then the sound insulation level of the lightweight wall is evaluated according to the provisions of the current national standard "Design Standard for Sound Insulation of Civil Buildings" (GB 50118-2010).

[0115] From the test results, the air-borne sound transmission loss of the lightweight wall in this embodiment is 50 dB, and the air-borne sound transmission loss after pink noise spectrum correction is 47 dB. According to the classification evaluation in the current national standard "Code for Sound Insulation Design of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of the structural wall is special. Compared with the commonly used reference example wall in prefabricated buildings, the air-borne sound transmission loss of the lightweight wall in this embodiment is improved by 13 dB; compared with the 197mm thick wall in the patent technology of application number 201810138311.2 "Sound insulation and heat insulation wood-plastic integrated frame shear wood wall", the sound transmission loss of the product in this embodiment is improved by 21 dB; compared with the 164mm thick wall with the highest sound insulation performance (44dB) reported in "Influence of Wood Structure Wall Building Details on Its Sound Insulation Performance" in Journal of Beijing Forestry University, Vol. 29, No. 3, 159-163, 2007, the sound transmission loss of the product in this embodiment is improved by 6dB. Compared with the 124mm thick lightweight wall reported in "Experimental Study on Sound Insulation Performance of Green Building Double-leaf Structure Lightweight Wall" in Acoustical Technology, Vol. 40, No. 5, 657-662, October 2021, the sound transmission loss of the product in this embodiment is improved by 5dB. Compared with the 124mm thick lightweight steel keel composite wall described in "Experiment and Design Review of Sound Insulation between Lightweight Steel Keel Thin Plates" in Noise and Vibration Control, Vol. 38, No. 1, 1-8, 15, February 2018, the sound transmission loss of the product in this embodiment is improved by 6dB. Compared with the 164mm thick lightweight wood wall reported in "Influence of Elastic Cross Groove and Soundproofing Felt on Sound Insulation Performance of Lightweight Wood Structure Wall" in Forestry Science and Technology, Vol. 42, No. 6, 47-51, 2017, the sound transmission loss of the product in this embodiment is improved by 10dB. Compared with the 148.5mm thick wall reported in "Experimental Study on Sound Insulation Performance of Wood-Plastic Building Wall" in Wood Industry, Vol. 45, No. 12, 16-21, 28, 2018, the sound transmission loss of the product in this embodiment is improved by 20dB. Compared with the patent technologies of application number 201922240285.7 "Adjustable Double-Helmholtz Resonance Lightweight Wood Wall", application number 201922240285.7 "Lightweight Wood Structure Wall", and application number 201721746761.7 "Lightweight Fireproof Soundproof Wall", the structure of this embodiment is simple, has modular wall components, can realize rapid transformation, and can be produced on existing lightweight wall assembly production lines. The production and installation of the wall do not require fine operation, and are suitable for the characteristics of rapid construction of prefabricated buildings; the materials used are low in cost and easy to obtain; the wall filling material meets the relevant provisions of the current national standard.According to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010), the wall body of the embodiment meets the air sound insulation performance requirements of residential buildings for separating walls (> 45dB), indoor bedroom walls (≥35dB), indoor other separating walls (≥30dB), separating walls between ordinary classrooms in school buildings (> 45dB), separating walls between music classrooms and piano rooms (> 45dB), separating walls between operating rooms and noise generating rooms in hospital buildings (> 45dB), separating walls between wards and between wards and operating rooms and ordinary rooms (> 45dB), separating walls between examination rooms (> 40dB), separating walls between guest rooms in hotel buildings (first class > 45dB), separating walls between guest rooms and corridors (special class > 45dB), separating walls between offices, conference rooms and noise generating rooms in office buildings (low requirement standard > 45dB), and separating walls between offices, conference rooms and ordinary rooms (low requirement standard > 45dB).

[0116] Example 7:

[0117] The structure and method for improving the air sound insulation performance of the light wall body for fabricated buildings. The structure of the light wall body uses C-shaped light steel keel with a size of 75mm x 40mm x 0.6mm (width x height x thickness) as vertical keel and edge keel, and uses U-shaped light steel keel with a size of 75mm x 40mm x 0.6mm (width x height x thickness) as top keel and bottom keel. The vertical keel spacing is 406mm, and the light steel keel wall body framework is formed by nailing connection. The wall body framework is covered with double-layer fire-resistant gypsum boards with a thickness of 12mm on both sides. A compressed glass wool strip with a thickness of 10mm and a width of 80mm is arranged between the fire-resistant gypsum board on one side and the wall body framework. The wall body framework is filled with glass wool with a surface density of 32kg / m 2 The final size of the light wall body for fabricated buildings is 2400mm x 2400mm x 133mm (width x height x thickness).

[0118] According to the current national standard "Acoustics - Measurement of the sound insulation properties of buildings and of building elements - Part 3: Laboratory measurement of airborne sound insulation of building elements" (GB / T 19889.3-2005), the air sound insulation laboratory determination of the structure of the light wall body is carried out. The measured data obtained is processed according to the method specified in the current national standard "Evaluation Standard for Building Sound Insulation" (GB / T 50121-2005), and the sound insulation grade of the structure of the light wall body is evaluated according to the provisions of the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010).

[0119] From the test results, the air-borne sound transmission loss of the lightweight wall in this embodiment is 51 dB, and the air-borne sound transmission loss after pink noise spectrum correction is 49 dB. According to the current national standard "Design Code for Sound Insulation of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of the wall is special. Compared with the commonly used reference example wall in prefabricated buildings, the air-borne sound transmission loss of the lightweight wall in this embodiment is improved by 14 dB; compared with the wall with a thickness of 197 mm in the patent technology with the application number 201810138311.2 "Sound and heat insulation wood-plastic integrated frame shear wood wall", the air-borne sound transmission loss of the product in this embodiment is improved by 22 dB; compared with the wall with a thickness of 164 mm and the highest sound insulation performance (44 dB) reported in "Influence of Wood Structure Wall Building Details on Its Sound Insulation Performance" in Journal of Beijing Forestry University, Vol. 29, No. 3, 159-163, 2007, the air-borne sound transmission loss of the product in this embodiment is improved by 7 dB. Compared with the lightweight wall with a thickness of 124 mm reported in "Experimental Study on Sound Insulation Performance of Green Building Double-leaf Lightweight Wall" in Acoustical Technology, Vol. 40, No. 5, 657-662, October 2021, the air-borne sound transmission loss of the product in this embodiment is improved by 6 dB. Compared with the lightweight steel keel type composite wall with a thickness of 124 mm described in "Experiment and Design Review of Sound Insulation between Light Steel Keel Thin Plates" in Noise and Vibration Control, Vol. 38, No. 1, 1-8, 15, February 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 7 dB. Compared with the lightweight wood wall with a thickness of 164 mm reported in "Research on the Influence of Elastic Cross Groove and Soundproofing Felt on the Sound Insulation Performance of Lightweight Wood Structure Wall" in Forestry Science and Technology, Vol. 42, No. 6, 47-51, 2017, the air-borne sound transmission loss of the product in this embodiment is improved by 11 dB. Compared with the wall with a thickness of 148.5 mm reported in "Experimental Study on Sound Insulation Performance of Wood-Plastic Building Wall" in Forest Products Industry, Vol. 45, No. 12, 16-21, 28, 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 21 dB. Compared with the patent technologies with the application numbers 201922240285.7 "Adjustable Double-Helmholtz Resonance Lightweight Wood Wall", 201922240285.7 "Lightweight Wood Structure Wall", and 201721746761.7 "Lightweight Fireproof Soundproof Wall", the structure of the embodiment is simple, has modular wall components, can realize rapid transformation, and can be produced on existing lightweight wall assembly production lines. The production and installation of the wall do not require fine operation, are suitable for the characteristics of rapid construction of prefabricated buildings, the materials used are low-cost and easy to obtain, and the internal filling material of the wall meets the relevant provisions of the current national standard.According to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010), the wall body of the embodiment meets the air sound insulation performance requirements of residential buildings for separating walls (> 45dB), indoor bedroom walls (≥35dB), indoor other separating walls (≥30dB), separating walls between ordinary classrooms in school buildings (> 45dB), separating walls between music classrooms and piano rooms (> 45dB), separating walls between operating rooms and noise generating rooms in hospital buildings (> 45dB), separating walls between wards and between wards and operating rooms and ordinary rooms (> 45dB), separating walls between examination rooms (> 40dB), separating walls between guest rooms in hotel buildings (first class > 45dB), separating walls between guest rooms and corridors (special class > 45dB), separating walls between offices, conference rooms and noise generating rooms in office buildings (low requirement standard > 45dB), and separating walls between offices, conference rooms and ordinary rooms (low requirement standard > 45dB).

[0120] Example 8:

[0121] The structure and method for improving the air sound insulation performance of the light wall body for fabricated buildings. The structure of the light wall body uses C-shaped light steel keel with a size of 75mm×40mm×0.6mm (width×height×thickness) as vertical keel and edge keel, and uses U-shaped light steel keel with a size of 75mm×40mm×0.6mm (width×height×thickness) as top keel and bottom keel. The vertical keel spacing is 406mm, and the light steel keel wall body framework is formed by nailing connection. The wall body framework is covered with double-layer fire-resistant gypsum boards with a thickness of 12mm on both sides. A compressed glass wool strip with a thickness of 10mm and a width of 80mm is arranged between the fire-resistant gypsum board on one side and the wall body framework. A metal damping keel is installed between the fire-resistant gypsum board on the other side and the wall body framework with a spacing of 600mm. The wall body framework is filled with glass wool with a surface density of 32kg / m 2 , and finally a light wall body for fabricated buildings with a size of 2400mm×2400mm×148mm (width×height×thickness) is formed.

[0122] According to the current national standard "Measurement of Sound Insulation of Buildings and Building Elements Part 3: Laboratory Measurement of Airborne Sound Insulation of Building Elements" (GB / T 19889.3-2005), the air sound insulation laboratory of the light wall body is determined. The measured data is processed according to the method specified in the current national standard "Evaluation Standard for Building Sound Insulation" (GB / T 50121-2005), and the sound insulation level of the light wall body is evaluated according to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010).

[0123] From the test results, the air-borne sound transmission loss of the lightweight wall in this embodiment is 52 dB, and the air-borne sound transmission loss after pink noise spectrum correction is 51 dB. According to the current national standard "Design Code for Sound Insulation of Civil Buildings" (GB50118-2010), the air-borne sound insulation level of the wall is special. Compared with the commonly used reference example wall in prefabricated buildings, the air-borne sound transmission loss of the lightweight wall in this embodiment is improved by 15 dB; compared with the wall with a thickness of 197 mm in the patent technology with the patent number 201810138311.2 "Sound and heat insulation wood-plastic integrated frame and shear wood wall", the air-borne sound transmission loss of the product in this embodiment is improved by 23 dB; compared with the wall with a thickness of 164 mm and the highest sound insulation performance (44 dB) reported in "Influence of Wood Structure Wall Building Details on Its Sound Insulation Performance" in the Journal of Beijing Forestry University, Vol. 29, No. 3, 159-163, 2007, the air-borne sound transmission loss of the product in this embodiment is improved by 8 dB. Compared with the lightweight wall with a thickness of 124 mm reported in "Experimental Study on Sound Insulation Performance of Green Building Double-leaf Lightweight Wall" in Acoustics Technology, Vol. 40, No. 5, 657-662, October 2021, the air-borne sound transmission loss of the product in this embodiment is improved by 7 dB. Compared with the lightweight steel keel type composite wall with a thickness of 124 mm described in "Experiment and Design Review of Sound Insulation between Lightweight Steel Keel Thin Plates" in Noise and Vibration Control, Vol. 38, No. 1, 1-8, 15, February 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 8 dB. Compared with the lightweight wood wall with a thickness of 164 mm reported in "Influence of Elastic Cross Groove and Soundproofing Felt on Sound Insulation Performance of Lightweight Wood Structure Wall" in Forestry Science and Technology, Vol. 42, No. 6, 47-51, 2017, the air-borne sound transmission loss of the product in this embodiment is improved by 12 dB. Compared with the wall with a thickness of 148.5 mm reported in "Experimental Study on Sound Insulation Performance of Wood-Plastic Building Wall" in Forest Products Industry, Vol. 45, No. 12, 16-21, 28, 2018, the air-borne sound transmission loss of the product in this embodiment is improved by 22 dB. Compared with the patent technologies with the patent numbers 201922240285.7 "Adjustable Double-Helmholtz Resonance Lightweight Wood Wall", 201922240285.7 "Lightweight Wood Structure Wall", and 201721746761.7 "Lightweight Fireproof Soundproof Wall", the structure of the embodiment is simple, has modular wall components, can realize rapid transformation, and can be produced on existing lightweight wall assembly production lines. The production and installation of the wall do not require fine operation, are suitable for the characteristics of rapid construction of prefabricated buildings, the materials used are low-cost and easy to obtain, and the internal filling material of the wall meets the relevant provisions of the current national standard.According to the current national standard "Code for Design of Sound Insulation of Civil Buildings" (GB 50118-2010), the wall body of the embodiment meets the sound insulation performance requirements of the following: the partition wall between residential buildings (>45dB), the partition wall between language classrooms and reading rooms in school buildings (>50dB), the partition wall between ordinary classrooms and various noise generating rooms (>50dB), the partition wall between ordinary classrooms (>45dB), the partition wall between music classrooms and piano rooms (>45dB), the partition wall between wards and noise generating rooms in hospital buildings (>50dB), the partition wall between operating rooms and noise generating rooms (>45dB), the partition wall between wards, operating rooms and ordinary rooms (>45dB), the partition wall between examination rooms (>40dB), the partition wall of the hearing test room (>50dB), the partition wall of the extracorporeal shock wave lithotripsy room and the nuclear magnetic resonance room (>50dB), the partition wall between guest rooms in hotel buildings (special class >50dB), the partition wall between guest rooms and corridors (special class >45dB), the outer wall of the guest room (special class >40dB), the partition wall between offices and meeting rooms and noise generating rooms in office buildings (high requirement standard >50dB), the partition wall between offices, meeting rooms and ordinary rooms (high requirement standard >50dB).

[0124] The foregoing merely illustrates some exemplary embodiments of the present application, and it is obvious to those skilled in the art that various modifications can be made to the described embodiments without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature, and should not be construed as limiting the scope of the claims of the present application.

Claims

1. A structure for improving the air sound insulation performance of a lightweight wall for a fabricated building, characterized by, The light steel skeleton framework (1) is composed of light steel connecting structure, both sides of the light steel skeleton framework (1) are respectively provided with metal damping batten (2), compressed glass wool or rock wool strip (3), inner layer covering panel (4) and outer layer covering panel (5); The light steel skeleton framework (1) is filled with glass wool or rock wool (6) in the cavity; The metal damping batten (2) is installed on the right side of the light steel skeleton framework (1) along the light steel from top to bottom in equal intervals, and the covering panel on the right side of the metal damping batten (2) is connected with the metal damping batten (2) by means of galvanized self-tapping screw; The compressed glass wool or rock wool strip (3) is 10mm in thickness and is arranged only at the cross section of the light steel on the left side of the light steel skeleton framework (1), and the inner layer covering panel (4) and the outer layer covering panel (5) on the left side of the compressed glass wool or rock wool strip (3) are connected with the light steel skeleton framework (1) by means of galvanized self-tapping screw penetrating the compressed glass wool or rock wool strip (3).

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