An assembled sound insulation and shock absorption composite floor

Abstract

The application relates to the field of assembly building technology and discloses an assembled sound insulation and shock absorption laminated floor slab, which comprises a pouring plate, the outer part of the pouring plate is provided with a cladding structure, the cladding structure comprises a main frame, a side stop, an upper stop rod and a connecting groove, the two upper stop rods are fixedly installed on the side stop, the upper stop rod can be detachably connected with the main frame and forms a box body structure to cladding the pouring plate, a connecting groove is arranged on one side of the main frame, and a protrusion is fixedly arranged on the other side of the main frame; and a cushion block assembly, the pouring plate is assembled with the main frame, the side stop and the upper stop rod at a construction site after being prefabricated in a factory, the modular design makes the components separable for transportation, the size and weight of a transportation unit are greatly reduced, the transportation cost and hoisting difficulty are reduced, the on-site assembly is flexible, the size deviation of the actual installation position can be fine-tuned, and the adaptability is high.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, specifically, it relates to a prefabricated sound-insulating and vibration-damping composite floor slab. Background Technology

[0002] Prefabricated composite floor slabs are an important component of industrialized construction and are widely used in high-rise residential buildings, office buildings, and public buildings. As users' demands for living quality continue to rise, the sound insulation and vibration damping performance of floor slabs have become key indicators for evaluating building quality.

[0003] According to the prior art, a composite floor system with built-in sound insulation and heat insulation is disclosed (announcement number: CN215167020U), which includes a bottom plate, a heat insulation and sound insulation layer and a top plate connected from bottom to top. The top plate is provided with a shock-absorbing pad, and several cavities are provided between the bottom plate and the heat insulation and sound insulation layer.

[0004] The aforementioned composite floor system still has the following technical defects:

[0005] Precast concrete slabs present challenges in transportation and installation, and exhibit poor on-site adaptability. Currently, most composite floor slabs are precast structures with fixed dimensions. On-site adjustments are frequently necessary due to beam / column position deviations and wall dimensional errors. However, precast slabs are difficult to dimensionally correct, often requiring re-precasting or on-site cutting, which impacts construction timelines and increases costs. Furthermore, the weight and difficulty of transporting precast slabs place higher demands on hoisting operations in high-rise buildings.

[0006] The existing floor slab systems rely primarily on damping pads to provide vertical cushioning, lacking effective damping structures for horizontal vibrations (such as lateral swaying caused by wind loads and seismic forces). Under strong winds or earthquakes, significant horizontal displacement can easily occur at the connection points between the floor slab and beams / columns, affecting the overall structural stability.

[0007] In view of this, the present invention is proposed. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0009] A prefabricated sound-insulating and vibration-damping composite floor slab includes;

[0010] The casting slab has an external covering structure, which includes a main frame, side rails, upper rails and connecting grooves. The side rails are fixedly installed with two upper rails, which can be detachably connected to the main frame to form a box structure to cover the casting slab. A connecting groove is opened on one side of the main frame, and a protrusion is fixedly provided on the other side of the main frame. The protrusion can be inserted into the connecting groove of another main frame.

[0011] Pad components are placed at the bottom of the main frame for cushioning.

[0012] In a preferred embodiment of the present invention, the side wall of the side guard is provided with two parallel upper guard rods, the upper guard rods are integrally formed with the side guard, the upper guard rods are provided with a plurality of mounting holes, bolts are provided in the mounting holes, and the bolts are threadedly connected to the main frame.

[0013] In a preferred embodiment of the present invention, the top and side walls of the main frame are open, the bottom of the main frame is provided with a window, and the casting plate is placed inside the cavity of the main frame.

[0014] In a preferred embodiment of the present invention, the side baffle is a rectangular plate and the upper baffle is a rectangular rod. The side baffle can block one side of the main frame, and the upper baffle can form a retaining edge above the main frame for limiting the casting plate.

[0015] In a preferred embodiment of the present invention, the connecting groove is a rectangular groove, and the protrusion forms a rectangular block that fits the gap between the connecting groove and the protrusion is integrally formed with the main frame.

[0016] In a preferred embodiment of the present invention, the pad assembly includes a support block, a deformation block, and wings. The support block is fixed to the bottom of the main frame by bolts, and a buffer cavity is formed at the bottom of the support block. The deformation block is located in the buffer cavity and is fixedly connected to the support block. Several wings for supporting the deformation block are provided around the deformation block.

[0017] In a preferred embodiment of the present invention, the deformable block is a rectangular column, the size of the deformable block is smaller than the size of the buffer cavity, the wing and the support block are integrally formed, and the end of the wing abuts against the side wall of the deformable block to form support.

[0018] In a preferred embodiment of the present invention, heat insulation boards are fixedly provided on both the top and bottom surfaces of the casting slab;

[0019] The end of the cast slab is provided with a sound insulation cavity along its length. Multiple sound insulation columns are arranged at intervals along the length of the sound insulation cavity. The sound insulation columns are composed of alternating layers of damping material and elastic material.

[0020] In a preferred embodiment of the present invention, the heat insulation board is an extruded polystyrene board or a rock wool board, which is fixed to the cast slab by an adhesive layer. The heat insulation board on the top surface can effectively prevent the heat from the upper layer from being transferred downwards, and the heat insulation board on the bottom surface can prevent cold bridging in the lower part of the floor slab. The bidirectional heat insulation improves the overall thermal performance of the floor slab. The sound insulation cavity has a semi-circular cross-section, and the outer diameter of the sound insulation column is adapted to the inner diameter of the sound insulation cavity.

[0021] In a preferred embodiment of the present invention, the soundproof column is formed by alternating layers of rubber and polyurethane foam, with its two ends abutting against the two ends of the soundproof cavity. In this embodiment, the soundproof column is formed by alternating layers of rubber and polyurethane foam, creating a composite structure of 3 to 5 layers. The outer diameter of the soundproof column matches the inner diameter of the soundproof cavity; the spacing between adjacent soundproof columns is 50 to 150 mm. When the floor slab is impacted or vibrated, this alternating multi-layered composite structure helps the soundproof column to undergo compression and shear deformation, consuming vibration energy. At the same time, the interfaces of multiple layers with different acoustic impedances cause sound waves to be continuously reflected and refracted, thereby achieving the purpose of sound insulation and vibration reduction.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. Achieving modular assembly for convenient transportation and installation: This invention features a detachable covering structure consisting of a main frame, side rails, and top rails. After the cast-in-place slab is prefabricated in the factory, it is assembled with the main frame, side rails, and top rails on the construction site. This modular design allows for the separate transportation of each component, significantly reducing the size and weight of the transportation unit, lowering transportation costs and hoisting difficulty. At the same time, on-site assembly is flexible and can be fine-tuned according to the dimensional deviations of the actual installation location, making it highly adaptable.

[0024] 2. The covering structure also serves as a buffer and protection, protecting the edges and corners of the cast slab. After the main frame, side rails, and upper rails are assembled, they form a box structure that completely covers the cast slab. On the one hand, it provides physical protection for the edges and corners of the cast slab during transportation and hoisting, effectively preventing bumps and damage. On the other hand, the covering structure, made of elastic materials (such as engineering rubber), has a certain buffering capacity and can absorb the impact energy during transportation.

[0025] 3. The protrusion and connecting groove are interlocked to achieve rapid assembly. The present invention has a connecting groove on one side of the main frame and a protrusion on the other side. When splicing multiple stacked floor slabs, the protrusions of adjacent floor slabs can be inserted into the connecting groove to complete the positioning and preliminary connection. There is no need for on-site formwork and concrete pouring, which greatly improves construction efficiency and ensures the quality and consistency of the connection nodes. This interlocking structure also restricts the relative horizontal displacement between floor slabs and enhances the integrity of the floor slab system.

[0026] 4. Multi-dimensional shock-absorbing pad, combining vertical buffering and lateral restraint: This invention sets a pad assembly at the bottom of the main frame, and a deformation block is set in the bottom buffer cavity of the support block. The deformation block is smaller than the buffer cavity, and the wings provide lateral support around it. When the floor slab is subjected to vertical load, the deformation block is compressed, providing vertical buffering and shock absorption; when the floor slab is subjected to horizontal vibration, the deformation block contacts the side wall of the buffer cavity, and the wings provide lateral elastic support, playing a dual role of horizontal restraint and buffering, thus achieving a multi-dimensional shock absorption effect.

[0027] 5. Good sound insulation effect: A sound insulation cavity is set at the end of the cast slab, and sound insulation columns made of a composite of damping material and elastic material are arranged at intervals in the cavity. When the sound wave propagates to the sound insulation cavity, the multi-layer composite structure generates an interface with different impedances. The sound energy is reflected, refracted and absorbed multiple times at the interface. At the same time, the elastic deformation of the sound insulation column can consume vibration energy, significantly reducing the transmission of impact sound and airborne sound.

[0028] 6. Excellent shock absorption performance: The elastic material layer of the sound insulation column (such as rubber and polyurethane foam) can effectively absorb and buffer the impact force from above the floor slab, reduce vibration transmission, and improve the comfort of the floor slab.

[0029] 7. Excellent thermal insulation performance: Insulation boards (extruded polystyrene boards or rock wool boards) are installed on both the top and bottom surfaces of the cast slab, forming a double-sided insulation layer, which effectively blocks the thermal bridge effect, improves the overall thermal resistance of the floor slab, and meets the building energy conservation requirements.

[0030] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0031] In the attached diagram:

[0032] Figure 1 This is one of the overall perspective views of the present invention;

[0033] Figure 2 This is the second overall perspective view of the present invention;

[0034] Figure 3 This is an exploded view of the covering structure of the present invention;

[0035] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0036] Figure 5 This is a perspective view of the pad assembly of the present invention;

[0037] Figure 6 Assembly drawing of insulation board and cast slab;

[0038] Figure 7 This is a radial section view of the soundproof column.

[0039] In the diagram: 10. Cast-in-place slab; 11. Insulation board; 20. Main frame; 21. Side baffle; 22. Upper baffle; 23. Connecting groove; 30. Support block; 31. Deformation block; 32. Wing; 40. Sound insulation column; 41. Rubber layer; 42. Polyurethane foam layer. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0041] like Figures 1 to 5 As shown, the present invention provides a prefabricated sound insulation and vibration reduction composite floor slab, including a cast-in-place slab 10, a covering structure, and a pad assembly.

[0042] Slab 10 structure:

[0043] The cast-in-place slab 10 is a precast concrete component, cast in a factory using molds. The cast-in-place slab 10 has an internal steel reinforcement skeleton to ensure sufficient structural strength. Several sound-insulating cavities are provided through the ends of the cast-in-place slab 10 (both ends along its length). These cavities are circular or rectangular channels extending along the length of the cast-in-place slab 10. The cavities are filled with sound-insulating foam (such as polyurethane foam or phenolic foam), which has a porous structure and can effectively absorb sound wave energy. The upper and lower surfaces of the cast-in-place slab 10 can be roughened or have shear keyways according to design requirements to enhance the bonding force with the encasing structure.

[0044] Encapsulation structure:

[0045] The covering structure is installed on the outside of the cast-in-place slab 10 to cover and protect the cast-in-place slab 10, while also enabling quick connection between floor slabs. The covering structure includes a main frame 20, side rails 21, upper rails 22, and connecting grooves 23.

[0046] The main frame 20 is a rectangular frame structure, made of engineering rubber or high-strength steel. Engineering rubber is preferred to utilize its good elasticity and damping characteristics for vibration reduction and noise reduction. The top and one side wall of the main frame 20 are open to facilitate the placement of the casting slab 10. A window is provided at the bottom of the main frame 20 for connection with the pad assembly. The internal dimensions of the main frame 20 are slightly larger than the external dimensions of the casting slab 10 (with a single-sided gap of 2-5 mm) to ensure smooth placement of the casting slab 10.

[0047] A connecting groove 23 is provided on one side of the main frame 20 (opposite to the open side). The connecting groove 23 is a rectangular groove that extends along the height direction of the main frame 20. A protrusion (not shown in the figure) is fixedly provided on the other side of the main frame 20 (the open side). The protrusion is a rectangular block that fits into the connecting groove 23 with a clearance, and the protrusion is integrally formed with the main frame 20. The size of the protrusion is slightly smaller than the size of the connecting groove 23 (0.5-1mm clearance on one side) to facilitate insertion. When multiple composite floor slabs are spliced, the protrusion of one floor slab is inserted into the connecting groove 23 of the adjacent floor slab to complete the positioning and initial connection. After insertion, construction adhesive can be applied between the protrusion and the connecting groove 23 to enhance the strength and sealing of the connection.

[0048] The side baffle 21 is a rectangular plate made of the same material as the main frame 20. The side baffle 21 is used to close the lateral opening of the main frame 20. Two parallel upper baffle rods 22 are fixedly installed on one side of the side baffle 21. The upper baffle rods 22 are rectangular rods integrally formed with the side baffle 21. Several mounting holes (usually 2-4) are provided on the top surface of the upper baffle rods 22, and bolts are installed in these holes. During installation, the side baffle 21 is placed against the opening side of the main frame 20, so that the upper baffle rods 22 rest on top of the main frame 20. The upper baffle rods 22 are then threadedly connected and locked to the top of the main frame 20 using bolts. After assembly, the main frame 20, the side baffle 21, and the upper baffle rods 22 together form a box structure with a partially open top, enclosing the cast-in-place plate 10.

[0049] The upper stop bar 22 forms a stop above the main frame 20, which limits the edge of the upper surface of the casting slab 10 and prevents the casting slab 10 from shifting during transportation and use.

[0050] Pad assembly:

[0051] The padding block assembly is located at the bottom of the main frame 20 to provide vertical and horizontal cushioning and shock absorption. The padding block assembly includes support blocks 30, deformation blocks 31, and wings 32. Multiple padding block assemblies are evenly arranged along the bottom of the main frame 20 (typically 4-6, located at the four corners and the center).

[0052] The support block 30 is a rectangular block made of engineering rubber and is fixed to the bottom of the main frame 20 by bolts. The bottom of the support block 30 is recessed inward to form a buffer cavity, which is a rectangular cavity and its size is larger than that of the deformation block 31.

[0053] The deformation block 31 is a rectangular column made of highly elastic rubber. It is located inside the buffer cavity and fixedly connected to the support block 30 (by vulcanization). The size of the deformation block 31 is smaller than the size of the buffer cavity (3-8mm gap on one side), reserving space for the lateral deformation of the deformation block 31. When the floor slab bears a vertical load, the deformation block 31 is compressed, providing vertical buffering and shock absorption.

[0054] The wing 32 is a triangular or trapezoidal thin plate, integrally formed (vulcanized) with the support block 30, and evenly distributed around the deformation block 31 (usually four, located on the four sides). The ends of the wing 32 abut against the sidewalls of the deformation block 31, providing lateral support. When the floor slab is subjected to horizontal vibration, the deformation block 31 undergoes lateral displacement, and the wing 32 provides a reaction force through elastic deformation, playing a role in horizontal limiting and buffering. The thickness and number of wings 32 can be adjusted according to the required horizontal stiffness; the thicker and more numerous the wings, the greater the horizontal stiffness.

[0055] like Figure 6 and Figure 7As shown, heat insulation plates 11 are fixedly installed on both the top and bottom surfaces of the casting plate 10;

[0056] The end of the casting slab 10 is provided with a sound insulation cavity along its length direction. Multiple sound insulation columns 40 are arranged at intervals along the length direction in the sound insulation cavity. The sound insulation columns 40 are composed of alternating layers of damping material and elastic material.

[0057] The heat insulation board 11 is an extruded polystyrene board or a rock wool board, which is fixed to the casting board 10 by an adhesive layer; the sound insulation cavity has a semi-circular cross section, and the outer diameter of the sound insulation column 40 is adapted to the inner diameter of the sound insulation cavity.

[0058] The soundproof column 40 is formed by alternating layers of rubber layer 41 and polyurethane foam layer 42, with its two ends abutting against the two ends of the soundproof cavity; the spacing between adjacent soundproof columns 40 is 50-150mm.

[0059] The cast-in-place slab 10 is a precast reinforced concrete slab, cast in a factory using C30 or higher grade concrete. Multiple prestressed steel bars are embedded along the length of the slab 10. These prestressed steel bars are low-relaxation steel strands or high-strength threaded steel bars, and prestress is applied using pre-tensioning or post-tensioning methods to improve the slab's flexural strength and crack resistance. Multiple shear connectors, which are studs or bent-up bars, are embedded at intervals (typically 300–500 mm) along the slab's length. These connectors form a shear connection with the cast-in-place concrete layer, ensuring the composite surface works collaboratively. The embedded prestressed steel bars enhance the slab's flexural strength and crack resistance; the embedded shear connectors at the top facilitate a reliable integral connection with the cast-in-place layer, improving the collaborative performance of the composite slab.

[0060] Insulation panels 20 are fixedly installed on the top and bottom surfaces of the cast-in-place slab 10. The insulation panels 20 are made of extruded polystyrene (XPS) or rock wool, with a thickness of 20–50 mm. The insulation panels 20 are fixed to the cast-in-place slab 10 via an adhesive layer, which may be polymer cement mortar or a special structural adhesive. The top insulation panel 20 effectively prevents heat transfer from the upper layer downwards, while the bottom insulation panel 20 prevents cold bridging at the bottom of the floor slab. This two-way insulation improves the overall thermal performance of the floor slab.

[0061] The sound insulation cavity is located at the ends of the cast slab 10 (both ends along the length direction). The sound insulation cavity is a strip-shaped cavity that runs through the length of the slab and has a circular cross-section. The size of the sound insulation cavity can be determined according to the thickness of the slab.

[0062] Soundproof columns 40 are spaced apart along the length of the soundproof cavity, with a spacing of 50-150mm between adjacent columns. Each soundproof column 40 is composed of alternating layers of damping material and elastic material. Specifically, in this embodiment, the soundproof column 40 is formed by alternating layers of rubber 41 and polyurethane foam 42, creating a composite structure of 3-5 layers. The outer diameter of the soundproof column 40 matches the inner diameter of the soundproof cavity. When the floor slab is impacted or vibrated, the soundproof column 40 undergoes compression and shear deformation, consuming vibration energy. Simultaneously, the interfaces of multiple layers with different acoustic impedances cause sound waves to continuously reflect and refract, thereby achieving sound insulation and vibration reduction. The soundproof columns 40 can be placed into the soundproof cavity after the cast-in-place slab 10 is formed, and then the two ends of the soundproof cavity can be sealed with cement, or other methods can be used to seal the soundproof cavity.

[0063] When prefabricating the cast-in-place slab 10 in the factory, the reinforcing cage (including prestressed steel bars and shear connectors) is first tied, and a mold for the sound insulation cavity is placed (either by core-pulling method or pre-embedded hollow tube method). Then, concrete is poured and cured to the design strength. Prefabricated sound insulation columns 40 are placed in the end sound insulation cavities (the rubber layer 41 and polyurethane foam layer 42 can be pre-combined in the factory by hot pressing or adhesive bonding). Finally, an adhesive layer is applied to the top and bottom surfaces of the cast-in-place slab 10, the heat insulation board 20 is attached, and pressure is applied for curing to obtain the finished product. This process results in a high degree of assembly and convenient construction: the floor slab is prefabricated in the factory, and only hoisting is required on site. It is then combined with the cast-in-place layer through shear connectors, resulting in fast construction speed and easy quality assurance.

[0064] Working principle:

[0065] Factory prefabrication

[0066] Inside the factory, molds for the casting slab 10 are made according to the design requirements. After the steel reinforcement skeleton is tied, concrete is poured. Sound insulation cavities are reserved at the ends of the casting slab 10. After the concrete has cured to the design strength, the molds are removed, and sound insulation foam is injected into the sound insulation cavities. The foam is then left to solidify and ready for use.

[0067] Meanwhile, the main frame 20, side rails 21, upper stop bar 22 and pad assembly are manufactured using rubber vulcanization or steel component welding processes.

[0068] On-site assembly

[0069] After the cast-in-place slab 10 is transported to the construction site, it is placed inside the cavity of the main frame 20. The side baffle 21 is placed against the opening side of the main frame 20, and the upper baffle 22 is placed on top of the main frame 20. The upper baffle 22 is then bolted to the main frame 20. The main frame 20, the side baffle 21, and the upper baffle 22 together form a box structure that covers and secures the cast-in-place slab 10.

[0070] The pad assembly is bolted to the bottom of the main frame 20.

[0071] Floor slab assembly

[0072] The assembled composite floor slabs are hoisted to the designed position. When splicing two adjacent composite floor slabs, the protrusion of one slab is inserted into the connecting groove 23 of the other slab to complete the positioning and connection. Construction adhesive can be applied to the interlocking gap as needed to enhance the strength and sealing of the connection. The interlocking structure restricts the relative horizontal displacement between adjacent floor slabs, enhancing the overall integrity of the floor system.

[0073] Shock absorption and cushioning

[0074] When the floor slab is subjected to a vertical load, the deformation block 31 is compressed, providing vertical buffering and vibration reduction, while the support block 30 deforms as a whole to absorb vibration energy. When the floor slab is subjected to horizontal vibrations (such as wind loads or seismic forces), the deformation block 31 generates lateral displacement, and the wing 32 provides a reaction force through elastic deformation, limiting the horizontal sway of the floor slab. The synergistic effect of the support block 30 and the deformation block 31 achieves multi-dimensional vibration reduction.

[0075] Sound insulation and noise reduction

[0076] When impact sounds or airborne sounds between floors travel to the floor slab, some of the sound energy is absorbed and dissipated by the sound insulation columns, while the other part of the sound energy undergoes multiple reflections and refractions as it passes through the sound insulation cavity, gradually attenuating the sound energy. This effectively reduces the amount of sound transmitted through the floor slab and improves its sound insulation performance.

[0077] The main frame 20, side rails 21, and upper stop bar 22 are preferably made of ethylene propylene diene monomer (EPDM) rubber or neoprene rubber (CR), which have good elasticity, aging resistance, and damping characteristics. EPDM rubber has a damping coefficient of 0.1-0.3, which can effectively absorb vibration energy. The support block 30 and deformation block 31 are made of natural rubber or nitrile rubber. The deformation block 31 has a Shore A hardness of 40-60, and the support block 30 has a Shore A hardness of 60-80. The wing 32 is integrally vulcanized with the support block 30. The thickness of the wing is 3-8mm, and the number can be set to 4-8 according to the load-bearing requirements. The cast-in-place slab 10 is made of C30-C50 concrete and internally reinforced with HRB400 grade steel bars.

[0078] The diameter of the sound insulation cavity is 30-60mm, and the spacing between adjacent sound insulation cavities is 80-120mm. After the sound insulation foam is filled, the cavity opening is sealed with polyurethane sealant to prevent moisture from entering.

[0079] The depth of the connecting groove 23 is 20-40mm, and the width is 30-50mm. The size of the protrusion is slightly smaller than that of the connecting groove 23 (0.5-1mm gap on one side). After insertion, epoxy resin structural adhesive can be injected into the gap to enhance the connection strength. The end of the protrusion can be chamfered (C2-C5) for easy insertion.

[0080] The number of support block assemblies is determined based on the floor slab dimensions and design load. For a standard-sized floor slab (3m × 6m), it is recommended to install one support block assembly at each of the four corners and the center, for a total of five. Spring washers should be installed on the bolt connections between the support block 30 and the main frame 20 to prevent loosening. Anti-slip textures can be provided on the bottom of the support block 30 to increase friction with the substructure.

[0081] If the main frame 20, side rails 21, and upper stop bar 22 are made of steel, they should be hot-dip galvanized or epoxy coated, with a zinc coating thickness ≥85μm and a coating thickness ≥150μm. Rubber-coated structures should have anti-aging agents and UV protectants added to extend their service life.

[0082] Before installation, the flatness of the main frame 20 should be checked, and the deviation should not exceed 2mm / m. Before the cast-in-place slab 10 is placed into the main frame 20, an interface agent should be applied to the inner wall of the main frame 20 to enhance the bonding force. The bolt connection between the upper stop bar 22 and the main frame 20 should be tightened according to the torque requirements (M10 bolt torque is 20-30 N·m). When assembling the floor slab, after the protrusion is inserted into the connecting groove 23, the flatness of the joint should be checked, and the deviation should not exceed 3mm.

[0083] After the pad assembly is installed, a load test should be conducted to verify whether the deformation in the vertical and horizontal directions meets the design requirements. After the sound insulation cavity is filled, random sampling should be performed to check the density of the foam filling. After assembly, an overall inspection of the floor slab should be conducted to ensure that all connection nodes are firm and reliable.

[0084] During use, the aging condition of the covering structure and padding components should be checked regularly. The rubber parts generally have a service life of 15-20 years and should be replaced promptly after that. The sound absorption performance of the sound insulation foam will decrease after it gets damp, so the bottom of the floor slab should be kept ventilated and dry.

[0085] Through the above structure and working principle, this invention solves the technical problems of inconvenient transportation and installation of existing prefabricated composite floor slabs, single shock absorption structure, and complex connection nodes. It achieves the beneficial effects of modular assembly, multi-dimensional shock absorption, and rapid assembly, and has good engineering application value.

[0086] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A prefabricated sound-insulating and vibration-damping composite floor slab, characterized in that, include; The casting slab (10) has an outer covering structure, which includes a main frame (20), side bars (21), upper bars (22) and connecting grooves (23). The side bars (21) are fixedly installed with two upper bars (22). The upper bars (22) can be detachably connected to the main frame (20) to form a box structure to cover the casting slab (10). A connecting groove (23) is opened on one side of the main frame (20), and a protrusion is fixedly provided on the other side of the main frame (20). The protrusion can be inserted into the connecting groove (23) of another main frame (20). A padding component is set at the bottom of the main frame (20) for cushioning.

2. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 1, characterized in that, The side wall of the side guard (21) is provided with two parallel upper guard rods (22). The upper guard rods (22) are integrally formed with the side guard (21). The upper guard rods (22) have several mounting holes, and bolts are provided in the mounting holes. The bolts are threadedly connected to the main frame (20).

3. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 1, characterized in that, The top and side walls of the main frame (20) are open, and the bottom of the main frame (20) is provided with a window. The casting plate (10) is placed inside the cavity of the main frame (20).

4. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 1, characterized in that, The side guard (21) is a rectangular plate and the upper guard rod (22) is a rectangular rod. The side guard (21) can block one side of the main frame (20), and the upper guard rod (22) can form a guard edge above the main frame (20) to limit the casting plate (10).

5. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 1, characterized in that, The connecting groove (23) is a rectangular groove, and the protrusion forms a rectangular block that fits the connecting groove (23) with a gap. The protrusion is integrally formed with the main frame (20).

6. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 1, characterized in that, The pad assembly includes a support block (30), a deformation block (31), and wings (32). The support block (30) is fixed to the bottom of the main frame (20) by bolts. The bottom of the support block (30) forms a buffer cavity. The deformation block (31) is located in the buffer cavity and is fixedly connected to the support block (30). Several wings (32) for supporting the deformation block (31) are provided around the deformation block (31).

7. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 6, characterized in that, The deformation block (31) is a rectangular column. The size of the deformation block (31) is smaller than the size of the buffer cavity. The wing (32) and the support block (30) are integrally formed. The end of the wing (32) abuts against the side wall of the deformation block (31) to form support.

8. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 1, characterized in that, Insulation plates (11) are fixedly installed on the top and bottom surfaces of the casting slab (10). The end of the casting slab (10) is provided with a sound insulation cavity along its length direction. Multiple sound insulation columns (40) are arranged at intervals along the length direction in the sound insulation cavity. The sound insulation columns (40) are composed of alternating layers of damping material and elastic material.

9. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 8, characterized in that, The heat insulation board (11) is an extruded polystyrene board or a rock wool board, which is fixed to the casting board (10) by an adhesive layer; the cross-section of the sound insulation cavity is semi-circular, and the outer diameter of the sound insulation column (40) is adapted to the inner diameter of the sound insulation cavity.

10. The prefabricated sound-insulating and vibration-damping composite floor slab according to claim 8, characterized in that, The soundproof column (40) is formed by alternating layers of rubber (41) and polyurethane foam (42), with its two ends abutting against the two ends of the soundproof cavity respectively; the distance between adjacent soundproof columns (40) is 50-150mm.

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