A crack-resistant floating floor slab and its construction method

Abstract

This application provides a crack-resistant floating floor slab and its construction method, belonging to the field of prefabricated buildings. The floating floor slab includes a structural floor slab layer, a thermally insulated rigid base layer, a sound-insulating rigid surface layer, and a fine aggregate concrete layer. The thermally insulated rigid base layer includes an insulation board and a first crack-resistant board, the first crack-resistant board being connected to the structural floor slab layer via a first cooperating structure. The sound-insulating rigid surface layer includes a sound-insulating pad layer and a second crack-resistant board, the second crack-resistant board being connected to the thermally insulated rigid base layer via a second cooperating structure. The material stiffness of the first and second crack-resistant boards is greater than that of the insulation board but less than that of the fine aggregate concrete layer, and the second crack-resistant board and the fine aggregate concrete layer share the load through a third cooperating structure. This invention, by setting up a double-layer crack-resistant board and establishing multiple cooperating load-bearing mechanisms, significantly improves the overall flexural stiffness and crack resistance of the floating floor slab, and is mainly used for floor insulation and sound insulation systems in newly built or renovated buildings.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated buildings, and in particular relates to a crack-resistant floating floor slab and its construction method. Background Technology

[0002] With the introduction of national mandatory standards such as the "Residential Building Code" GB 55038-2025 regarding the impact sound insulation performance of residential floors, and the increasing energy-saving requirements of green buildings, floating floor insulation and sound insulation systems have been widely used in newly constructed residential buildings. For example... Figure 1 As shown, this system constructs a "mass-spring-mass" vibration isolation system by laying an elastic thermal insulation and soundproofing layer (b+c) on the structural floor layer (a), then pouring a fine stone concrete protective layer (d), and installing vertical sound insulation sheets between the protective layer and the surrounding walls. This achieves both effective isolation of impact noise and thermal insulation of the floor slab. In floating floors, the building panel layer and the structural floor slab layer are completely separated by the thermal insulation and soundproofing layer, much like a ship floating on water, hence the name floating floor. However, in practical engineering applications, floating floors commonly suffer from quality problems such as cracking and arching of the building panel layer, seriously affecting the building's functionality and durability. Analysis revealed that the main cause was that the insulation board (c), sound insulation layer (b), and fine aggregate concrete protective layer (d) of the sandwich structure were tightly bonded together. Due to the mismatch in properties of the three materials and the lack of interfacial constraints, coupled with the low crack resistance of the fine aggregate concrete protective layer (d), stress concentration occurred under temperature changes or loads, leading to cracking. Therefore, this invention was developed.

[0003] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] One objective of this invention is to provide a crack-resistant floating floor slab; The second objective of this invention is to propose a construction method for a crack-resistant floating floor slab.

[0005] To achieve one of the above objectives, the present invention first provides a crack-resistant floating floor slab, comprising: Structural floor slab; A thermally insulated rigid base layer is laid on the structural floor slab. The thermally insulated rigid base layer includes an insulation board and a first crack-resistant board. The insulation board is located between the structural floor slab and the first crack-resistant board. The first crack-resistant board is connected to the structural floor slab through a first cooperative structure. A sound-insulating rigid surface layer is laid on the thermal insulation rigid base layer. The sound-insulating rigid surface layer includes a sound-insulating pad layer and a second crack-resistant plate. The sound-insulating pad layer is located between the first crack-resistant plate and the second crack-resistant plate. The second crack-resistant plate is connected to the thermal insulation rigid base layer in cooperation with the sound-insulating pad layer through a second cooperative structure. A fine aggregate concrete layer, which is cast in place on the second crack-resistant slab; The thermal insulation rigid base layer and the sound insulation rigid surface layer are configured such that the material stiffness of the first crack-resistant board and the second crack-resistant board is greater than that of the thermal insulation board but less than that of the fine stone concrete layer; the second crack-resistant board and the fine stone concrete layer share the load through a third cooperative structure.

[0006] Preferably, the first collaborative structure is an interleaved collaborative structure.

[0007] Preferably, the second cooperative structure is configured as the adhesive surface between the sound insulation pad and the first crack-resistant plate, and between the sound insulation pad and the second crack-resistant plate.

[0008] Preferably, the third cooperative structure is a rough interlocking surface formed on the second crack-resistant plate; or, the third cooperative structure is a cooperative tie member that connects the second crack-resistant plate and the fine aggregate concrete layer.

[0009] Preferably, the sound-insulating rigid surface layer is formed by assembling multiple sound-insulating rigid modules; each sound-insulating rigid module includes a second crack-resistant plate and a sound-insulating pad, the sound-insulating pads of adjacent sound-insulating rigid modules are spliced ​​and bonded together, and a post-cast groove is formed between the second crack-resistant plates of adjacent sound-insulating rigid modules.

[0010] Preferably, the post-casting groove is provided with a post-casting structural component, and the fine aggregate concrete layer fills the post-casting groove.

[0011] Preferably, the first crack-resistant plate and the second crack-resistant plate are configured to satisfy at least one of the following performance parameters: Density: 400~600 kg / m³ 3 ; Compressive strength perpendicular to the plate surface: ≥0.1MPa; Flexural tensile strength: ≥0.8MPa; Flexural modulus: ≥250MPa; Mohs hardness: 2~3; Combustion performance: Grade A.

[0012] The technical effects of the above-mentioned technical solutions of the present invention arise from one or more of the following combinations: In floating floors, the fine aggregate concrete layer experiences tension at the top and compression at the bottom when facing arching deformation. In this application, on one hand, the thermal insulation rigid base layer, the sound insulation rigid surface layer, and the fine aggregate concrete layer work together through a synergistic structure to share the load, ensuring that the first and second crack-resistant boards have sufficient compressive strength and work in conjunction with the fine aggregate concrete layer under tension, compression, and bending to improve crack resistance. On the other hand, the thermal insulation board and sound insulation pad are arranged in layers to avoid inconsistent deformation caused by different material temperature stresses, further preventing cracking. Furthermore, the effective mechanical thickness of the floating structure in this solution, including the thermal insulation rigid base layer, the sound insulation rigid surface layer, and the fine aggregate concrete layer, is also greater than that of traditional floating floors.

[0013] Furthermore, when the first collaborative structure is an interpenetrating collaborative structure inserted into the structural floor slab, the effective mechanical thickness of the floating structural collaborative structure in this scheme also includes the insertion depth of the interpenetrating collaborative structure into the structural floor slab.

[0014] The thermal insulation rigid base layer and the sound insulation rigid surface layer can be laid as a whole or assembled in sections to form a standardized or modular process.

[0015] Low-modulus adhesives, such as butyl damping adhesives, are used. After curing, the adhesive layer itself is compressible and has a very low modulus. When bonding and adhering to sound insulation rigid modules, it forms a rigid solid vibration transmission channel, but it does not constitute a harmful sound bridge.

[0016] To achieve the above two objectives, the present invention provides a method for constructing a crack-resistant floating floor slab, comprising the following steps: The thermal insulation rigid base layer is laid on the structural floor slab, and the first crack-resistant plate of the thermal insulation rigid base layer is connected to the structural floor slab through a first cooperative structure; The sound-insulating rigid surface layer is laid on the thermal insulation rigid base layer, and the second crack-resistant plate of the sound-insulating rigid surface layer is connected to the thermal insulation rigid base layer in conjunction with the sound-insulating pad layer through a second cooperative structure. A fine aggregate concrete layer is cast in place on the second crack-resistant slab.

[0017] Preferably, in the step of laying the sound-insulating rigid surface layer on the thermal insulation rigid base layer, the second crack-resistant board and the sound-insulating pad layer are assembled into a sound-insulating rigid module according to standard dimensions, and adjacent sound-insulating rigid modules are connected by adhesive to form the sound-insulating rigid surface layer.

[0018] Preferably, adjacent sound-insulating rigid modules are bonded together with adhesive, the adhesive being configured to meet at least one of the following performance parameters: Elastic modulus: 0.15~0.3 MPa; After curing, Shore A hardness: 12-22; Elongation at break: ≥500%; Tensile strength: 0.35~0.60 MPa.

[0019] Preferably, in the step of laying the sound-insulating rigid surface layer on the thermal insulation rigid base layer, the second crack-resistant plate and the sound-insulating pad layer are assembled to form a sound-insulating rigid module according to standard dimensions, the sound-insulating pad layers of adjacent sound-insulating rigid modules are spliced ​​and bonded, and a post-pouring groove is formed between the second crack-resistant plates of adjacent sound-insulating rigid modules.

[0020] The technical effects of the above-mentioned technical solutions of the present invention arise from one or more of the following combinations: By prefabricating the second crack-resistant plate and the sound insulation pad into a standard sound insulation rigid module, only assembly and gluing are required on site, which greatly simplifies the process, shortens the construction period, and reduces the construction difficulty.

[0021] A post-cast groove is formed between the second crack-resistant plates of adjacent sound insulation rigid modules. When fine stone concrete is poured in place, it automatically fills the groove to form reinforcing ribs, so that the floor slab forms a grid-like reinforced structure, which further improves crack resistance and integrity.

[0022] The joints of the first crack-resistant plate and the second crack-resistant plate can be staggered to prevent cracks from running through the entire structure, effectively improving the crack resistance of the system.

[0023] Through the triple protection of the first coordinating structure (nail), the second coordinating structure (adhesive surface), and the third coordinating structure (rough interlocking surface or tie rod), a strong overlapping effect is ensured between each layer, fundamentally solving the cracking and arching problem caused by interface separation in traditional floating floor slabs.

[0024] Low-modulus butyl damping adhesive is used for bonding between modules. The adhesive layer itself is compressible and has a low modulus, forming a rigid solid vibration transmission channel that does not constitute a harmful sound bridge, thus balancing structural integrity and sound insulation performance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a floating floor slab in the prior art.

[0026] Figure 2 This is a schematic diagram of the structure of the crack-resistant floating floor slab of the present invention.

[0027] Figure 3 This is a schematic diagram of the staggered joint assembly structure of the anti-cracking floating floor slab of the present invention.

[0028] Figure 4 This is a schematic diagram of the collaborative structure in the anti-cracking floating floor slab of the present invention.

[0029] Figure 5 This is a schematic diagram of the installation of post-cast structural components in the anti-cracking floating floor slab of the present invention.

[0030] Figure 6 This is a schematic diagram of the installation of the crack-resistant floating floor slab of the present invention.

[0031] Figure 7 This is a structural comparison diagram of the crack-resistant floating floor slab of this invention and the existing floating floor slab.

[0032] Figure 8 This is a comparison diagram of the anti-cracking effect of the floating floor slab of this invention and the existing floating floor slab.

[0033] Figure 9 This is a three-dimensional view of the modular assembly of the crack-resistant floating floor slab of the present invention.

[0034] Figure 10 This is a diagram illustrating the post-casting structure of the post-casting groove in the anti-cracking floating floor slab of the present invention.

[0035] The components are as follows: 1. Thermal insulation rigid base layer; 11. Thermal insulation board; 12. First crack-resistant board; 120. Joint between the first crack-resistant boards; 13. First coordinating structure; 2. Sound insulation rigid surface layer; 20. Sound insulation rigid module; 21. Second crack-resistant board; 210. Joint between the second crack-resistant boards; 211. Post-cast groove; 212. Post-cast structural component; 22. Sound insulation pad layer; 23. Second coordinating structure; 24. Third coordinating structure; 3. Fine stone concrete layer; 30. Reinforcing rib; 31. Steel mesh; 4. Structural floor slab layer; 5. Wall. Detailed Implementation

[0036] The following description is provided to enable those skilled in the art to implement and use the invention and adapt it to specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0037] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that practice of the invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without being depicted in detail to avoid obscuring the invention.

[0038] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0039] Note that, where used, the markings vertical, horizontal, left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are used merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between the various parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0043] "And / or" in parallel: means "both A and B"; "or" in alternative: means "either A or B"; "and / or" in combination: means "both A and B, and either A or B".

[0044] Structural Example: Please combine Figures 1-10This embodiment provides a crack-resistant floating floor slab, which consists of a structural floor slab layer 4, a thermal insulation rigid base layer 1, a sound insulation rigid surface layer 2, and a fine stone concrete layer 3 arranged sequentially from bottom to top. Structural floor slab 4 serves as the floor slab of the building, and it can be implemented as a composite slab, a fully precast slab, a cast-in-place slab, etc., without any restrictions.

[0045] Specifically, a rigid thermal insulation base layer 1 is laid on the structural floor slab 4. The rigid thermal insulation base layer 1 includes an insulation board 11 and a first crack-resistant board 12. The insulation board 11 is located between the structural floor slab 4 and the first crack-resistant board 12. The first crack-resistant board 12 is connected to the structural floor slab 4 through a first cooperating structure 13. A rigid sound insulation surface layer 2 is laid on the rigid thermal insulation base layer 1. The rigid sound insulation surface layer 2 includes a sound insulation pad 22 and a second crack-resistant board 21. The sound insulation pad 22 is located between the first crack-resistant board 12 and the second crack-resistant board 21. The second crack-resistant board 21 is connected to the rigid thermal insulation base layer 1 through a second cooperating structure 23 in conjunction with the sound insulation pad 22. A fine aggregate concrete layer 3 is cast-in-place on the second crack-resistant board 21, thereby forming a floating structure with the second crack-resistant board 21.

[0046] Furthermore, the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2 are configured such that the material stiffness of the first crack-resistant plate 12 and the second crack-resistant plate 21 is greater than that of the thermal insulation plate but less than that of the fine stone concrete layer 3; the second crack-resistant plate 21 and the fine stone concrete layer 3 share the load through the third cooperative structure 24.

[0047] In this embodiment, the first crack-resistant plate 12 and the second crack-resistant plate 21, with their own stiffness, work together with the fine aggregate concrete layer 3 to form a tensile, compressive, and bending resistance, thereby improving crack resistance. As a preferred embodiment, the first crack-resistant plate 12 and the second crack-resistant plate 21 are configured to meet at least one of the following performance parameters: Density: 400~600 kg / m³ 3 ; Compressive strength perpendicular to the plate surface: ≥0.1MPa; Flexural tensile strength: ≥0.8MPa; Flexural modulus: ≥250MPa; Mohs hardness: 2~3; Combustion performance: A.

[0048] In the specific selection and implementation of the board material, this embodiment preferably uses wood wool cement board or bamboo wool cement board, and this embodiment takes wood wool cement board as an example for specific implementation. It should be noted that this embodiment is not limited to wood wool cement board or bamboo wool cement board, and can meet at least one of the above-mentioned structural parameters in addition to the functional parameter of combustion performance. This embodiment will not provide examples of each parameter.

[0049] The first crack-resistant plate 12, the second crack-resistant plate 21, and the fine aggregate concrete layer 3 share the load through a cooperative structure. Specifically, the first cooperative structure 13 is an interlocking cooperative structure, preferably a nail gun. The second cooperative structure 23 is configured as the adhesive surface between the sound insulation pad 22 and the first crack-resistant plate 12, and between the sound insulation pad 22 and the second crack-resistant plate 21. It is preferable to use engineering adhesives, such as geotextiles, for bonding.

[0050] The third cooperative structure 24 is formed on the rough interlocking surface of the second crack-resistant plate 21; or, the third cooperative structure 24 is a cooperative tie member connecting the second crack-resistant plate 21 and the fine aggregate concrete layer 3. Furthermore, the rough interlocking surface can form an overlapping effect with the fine aggregate concrete layer 3, thereby achieving a cooperative force-bearing effect. However, as the preferred embodiment, the second crack-resistant plate 21 and the fine aggregate concrete layer 3 are connected by the cooperative tie member. Preferably, the cooperative tie member can be a standard part such as a nail or screw, or a non-standard part with a bolted end and an insertion tip. The bolted end is bolted to the fine aggregate concrete layer 3, and the insertion tip is inserted into the core crack-resistant layer.

[0051] Furthermore, the insulation board is bonded to the first crack-resistant board 12 and the second crack-resistant board 21 using engineering adhesive. Alternatively, the connection structure is configured as an interlocking connector that integrally inserts the first crack-resistant board 12, the insulation board, and the second crack-resistant board 21. The contact interfaces between the first crack-resistant board 12 and the insulation board, and between the insulation board and the second crack-resistant board 21, are formed into adhesive surfaces using engineering adhesive. Alternatively, the first crack-resistant board 12, the insulation board, and the second crack-resistant board 21 are integrally inserted and fixed using the interlocking connector.

[0052] Preferably, the interlocking connector includes multiple interlocking nails, and the first crack-resistant plate 12, the insulation board, and the second crack-resistant plate 21 are integrally connected by the interlocking nails in a staggered manner. This step is prefabricated in the factory, thereby reducing the construction difficulty for on-site workers.

[0053] In a preferred embodiment of this invention, the insulation board is bonded to the first crack-resistant board 12 and the second crack-resistant board 21 with engineering adhesive, which can break the sound bridge and achieve a better sound insulation effect.

[0054] Specifically, during the installation of the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2, the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2 can be installed as a whole, and they should be disconnected from the wall 5 during installation to avoid sound bridges.

[0055] Alternatively, the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2 can be modularly assembled to achieve standardized manufacturing and construction. Taking the sound insulation rigid surface layer 2 as an example, the sound insulation rigid surface layer 2 is implemented as a block assembly of multiple sound insulation rigid modules 20. The sound insulation rigid module 20 includes a second crack-resistant plate 21 and a sound insulation pad 22. The sound insulation pads 22 of adjacent sound insulation rigid modules 20 are spliced ​​and bonded together, and a post-pouring groove 211 is formed between the second crack-resistant plates 21 of adjacent sound insulation rigid modules 20.

[0056] Furthermore, post-cast structural components 212, such as U-shaped reinforcing bars or other structural components adapted to the post-cast groove 211, are added to the post-cast groove 211. Examples of other structural components include wire mesh. The post-cast groove 211 is filled during the in-situ casting of the fine aggregate concrete layer 3. This helps to form reinforcing ribs 30 in the fine aggregate concrete layer 3, further enhancing its crack resistance.

[0057] Alternatively, adjacent rigid sound insulation modules 20 may be bonded together using adhesive, which is configured to meet at least one of the following performance parameters: Elastic modulus: 0.15~0.3 MPa; After curing, Shore A hardness: 12-22; Elongation at break: ≥500%; Tensile strength: 0.35~0.60 MPa.

[0058] To meet the specific requirements of this adhesive, this embodiment uses low-modulus butyl damping adhesive.

[0059] Similarly, the thermal insulation rigid base layer 1 is implemented as a multi-module thermal insulation rigid layer assembled from multiple modules. Each thermal insulation rigid layer includes a first crack-resistant plate 12 and a thermal insulation plate 11. The thermal insulation plates 11 of adjacent thermal insulation rigid layers are spliced ​​and bonded together, and the first crack-resistant plates 12 of adjacent thermal insulation rigid layers are sealed and bonded together using the aforementioned low-modulus butyl damping adhesive.

[0060] As shown above, when assembling multiple thermal insulation rigid modules and sound insulation rigid modules 20, the joints 120 between the first crack-resistant plates and the joints 210 between the second crack-resistant plates can be aligned or staggered. Figure 3 As shown, the joint 120 between the first crack-resistant plates and the joint 210 between the second crack-resistant plates are staggered on the horizontal projection plane to avoid the cracks running vertically through each other.

[0061] Staggered joints further enhance the ability to prevent arching.

[0062] Furthermore, in this embodiment, the materials used for the insulation board and the sound insulation layer 22 are common techniques in floor slabs and will not be elaborated upon here. Generally, the insulation board is made of materials such as extruded polystyrene board. The sound insulation layer 22 is made of materials such as rubber pads. The fine aggregate concrete layer 3 may also include a reinforcing mesh 31 or a wire mesh.

[0063] Method Implementation Examples: This embodiment provides a construction method for a crack-resistant floating floor slab, mainly including the following steps: S1 is used to lay a rigid thermal insulation base layer 1 on the structural floor slab layer 4. Specifically, structural floor slab 4, as the floor slab of the building, can be implemented as a composite slab, a fully precast slab, a cast-in-place slab, etc., without limitation. The material selection for insulation board and sound insulation layer 22 is a common technique in floor slabs, and will not be elaborated here. Generally, insulation board uses materials such as extruded polystyrene board.

[0064] Specifically, the rigid thermal insulation base layer 1 is laid on the structural floor slab 4. The rigid thermal insulation base layer 1 includes an insulation board 11 and a first crack-resistant board 12. The insulation board 11 is located between the structural floor slab 4 and the first crack-resistant board 12. The first crack-resistant board 12 is connected to the structural floor slab 4 through a first cooperating structure 13. Furthermore, the first cooperating structure 13 is an interlocking cooperating structure, preferably a nail gun.

[0065] S2 is laid on the thermal insulation rigid base layer 1 with the sound insulation rigid surface layer 2: The sound-insulating rigid surface layer 2 is laid on the thermal insulation rigid base layer 1. The sound-insulating rigid surface layer 2 includes a sound-insulating pad 22 and a second crack-resistant plate 21. The sound-insulating pad 22 is located between the first crack-resistant plate 12 and the second crack-resistant plate 21. The second crack-resistant plate 21 is connected to the thermal insulation rigid base layer 1 in conjunction with the sound-insulating pad 22 through a second cooperative structure 23.

[0066] Furthermore, the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2 are configured such that the material stiffness of the first crack-resistant plate 12 and the second crack-resistant plate 21 is greater than that of the thermal insulation plate but less than that of the fine stone concrete layer 3; the second crack-resistant plate 21 and the fine stone concrete layer 3 share the load through the third cooperative structure 24.

[0067] In this embodiment, the first crack-resistant plate 12 and the second crack-resistant plate 21, with their own stiffness, work together with the fine aggregate concrete layer 3 to form a tensile, compressive, and bending resistance, thereby improving crack resistance. As a preferred embodiment, the first crack-resistant plate 12 and the second crack-resistant plate 21 are configured to meet at least one of the following performance parameters: Density: 400~550 kg / m³ 3 ; Compressive strength perpendicular to the plate surface: ≥0.1MPa; Flexural tensile strength: ≥0.8MPa; Flexural modulus: ≥250MPa; Mohs hardness: 2~3; Combustion performance: B1 grade.

[0068] In the specific selection and implementation of the board material, this embodiment preferably uses wood wool cement board or bamboo wool cement board, and this embodiment takes wood wool cement board as an example for specific implementation. It should be noted that this embodiment is not limited to wood wool cement board or bamboo wool cement board, and can meet at least one of the above-mentioned structural parameters in addition to the functional parameter of combustion performance. This embodiment will not provide examples of each parameter.

[0069] The second cooperating structure 23 is configured as the adhesive surface between the sound insulation pad 22 and the first crack-resistant plate 12, and between the sound insulation pad 22 and the second crack-resistant plate 21. Preferably, it can be bonded using engineering adhesives, such as geotextiles.

[0070] The third cooperative structure 24 is formed on the rough interlocking surface of the second crack-resistant plate 21; or, the third cooperative structure 24 is a cooperative tie member connecting the second crack-resistant plate 21 and the fine aggregate concrete layer 3. Furthermore, the rough interlocking surface can form an overlapping effect with the fine aggregate concrete layer 3, thereby achieving a cooperative force-bearing effect. However, as the preferred embodiment, the second crack-resistant plate 21 and the fine aggregate concrete layer 3 are connected by the cooperative tie member. Preferably, the cooperative tie member can be a standard part such as a nail or screw, or a non-standard part with a bolted end and an insertion tip. The bolted end is bolted to the fine aggregate concrete layer 3, and the insertion tip is inserted into the core crack-resistant layer.

[0071] Furthermore, the insulation board is bonded to the first crack-resistant board 12 and the second crack-resistant board 21 using engineering adhesive. Alternatively, the connection structure is configured as an interlocking connector that integrally inserts the first crack-resistant board 12, the insulation board, and the second crack-resistant board 21. The contact interface between the first crack-resistant board 12, the insulation board, and the second crack-resistant board 21 is further bonded with engineering adhesive to form an adhesive surface. Alternatively, the first crack-resistant board 12, the insulation board, and the second crack-resistant board 21 are integrally inserted and fixed using the interlocking connector.

[0072] Preferably, the interlocking connector includes multiple interlocking nails, and the first crack-resistant plate 12, the insulation board, and the second crack-resistant plate 21 are integrally connected by the interlocking nails in a staggered manner. This step is prefabricated in the factory, thereby reducing the construction difficulty for on-site workers.

[0073] In a preferred embodiment of this invention, the insulation board is bonded to the first crack-resistant board 12 and the second crack-resistant board 21 with engineering adhesive, which can break the sound bridge and achieve a better sound insulation effect.

[0074] Specifically, during the installation of the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2, the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2 can be installed as a whole, and they should be disconnected from the wall 5 during installation to avoid sound bridges.

[0075] Alternatively, the thermal insulation rigid base layer 1 and the sound insulation rigid surface layer 2 can be modularly assembled to achieve standardized manufacturing and construction. Taking the sound insulation rigid surface layer 2 as an example, the sound insulation rigid surface layer 2 is implemented as a block assembly of multiple sound insulation rigid modules 20. The sound insulation rigid module 20 includes a second crack-resistant plate 21 and a sound insulation pad 22. The sound insulation pads 22 of adjacent sound insulation rigid modules 20 are spliced ​​and bonded together, and a post-pouring groove 211 is formed between the second crack-resistant plates 21 of adjacent sound insulation rigid modules 20.

[0076] Furthermore, post-cast structural components 212, such as U-shaped reinforcing bars or other structural components adapted to the post-cast groove 211, are added to the post-cast groove 211. Examples of other structural components include wire mesh. The post-cast groove 211 is filled during the in-situ casting of the fine aggregate concrete layer 3. This helps to form reinforcing ribs 30 in the fine aggregate concrete layer 3, further enhancing its crack resistance.

[0077] Alternatively, adjacent rigid sound insulation modules 20 may be bonded together using adhesive, which is configured to meet at least one of the following performance parameters: Elastic modulus: 0.15~0.3 MPa; After curing, Shore A hardness: 12-22; Elongation at break: ≥500%; Tensile strength: 0.35~0.60 MPa.

[0078] To meet the specific requirements of this adhesive, this embodiment uses low-modulus butyl damping adhesive.

[0079] Similarly, the thermal insulation rigid base layer 1 is implemented as a multi-module thermal insulation rigid layer assembled from multiple modules. Each thermal insulation rigid layer includes a first crack-resistant plate 12 and a thermal insulation plate 11. The thermal insulation plates 11 of adjacent thermal insulation rigid layers are spliced ​​and bonded together, and the first crack-resistant plates 12 of adjacent thermal insulation rigid layers are sealed and bonded together using the aforementioned low-modulus butyl damping adhesive.

[0080] As shown above, when assembling multiple thermal insulation rigid modules and sound insulation rigid modules 20, the joints 120 between the first crack-resistant plates and the joints 210 between the second crack-resistant plates can be aligned or staggered. Staggered joints further improve the anti-arching capability.

[0081] S3 is a fine aggregate concrete layer 3 cast in place on the second crack-resistant plate 21: The fine aggregate concrete layer 3 is cast in place on the second crack-resistant plate 21, thereby forming a floating structure together with the second crack-resistant plate 21. Specifically, the fine aggregate concrete layer 3 may also include a reinforcing mesh 31 or a wire mesh.

[0082] Comparative Example: Please see Figure 1 , Figure 9 and Figure 10This embodiment compares the existing floating floor slab technology with the technical solution of this application. In the technical solution of the application, the thickness of the sound insulation layer 221 is t1; the thickness of the first crack-resistant plate 1221 is t2; the thickness of the insulation board 22 is t3; the thickness of the second crack-resistant plate 2123 is t4; and the thickness of the fine stone concrete layer 3 is t5.

[0083] In the prior art, the thickness of the sound insulation layer 221 is t1a; the thickness of the insulation board 22 is t3a; and the thickness of the fine stone concrete layer 3 is t5a.

[0084]

[0085] "Effective thickness" refers to the thickness that participates in bending resistance. In the prior art, only the fine aggregate concrete layer (40mm) is considered as the effective thickness h1, because the sound insulation layer and the thermal insulation board do not contribute to bending stiffness. However, in this application, the co-structure will share the stress from t1 to t6, forming the effective thickness h2.

[0086] The bending resistance of a floating floor slab (floating section) is measured based on its moment of inertia. The stiffness ratio between the two is: (h²) 3 / (h1) 3 =(100) 3 / (40) 3 =15.625. Therefore Figure 10 The hollow deformation degree (almost no deformation) of this application is much smaller than the hollow deformation degree y1 of existing floating floor slabs.

[0087] It can be seen that, with the total thickness remaining basically unchanged, this application increases the effective bending thickness of the floating floor slab by 150% and raises the cross-sectional bending stiffness to 15.625 times that of the traditional structure by separating the insulation board and the sound insulation pad and introducing the crack-resistant board. Furthermore, the present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A crack-resistant floating floor slab, characterized in that, include: Structural floor slab; A thermally insulated rigid base layer is laid on the structural floor slab. The thermally insulated rigid base layer includes an insulation board and a first crack-resistant board. The insulation board is located between the structural floor slab and the first crack-resistant board. The first crack-resistant board is connected to the structural floor slab through a first cooperative structure. A sound-insulating rigid surface layer is laid on the thermal insulation rigid base layer. The sound-insulating rigid surface layer includes a sound-insulating pad layer and a second crack-resistant plate. The sound-insulating pad layer is located between the first crack-resistant plate and the second crack-resistant plate. The second crack-resistant plate is connected to the thermal insulation rigid base layer in cooperation with the sound-insulating pad layer through a second cooperative structure. A fine aggregate concrete layer, which is cast in place on the second crack-resistant slab; The thermal insulation rigid base layer and the sound insulation rigid surface layer are configured such that the material stiffness of the first crack-resistant board and the second crack-resistant board is greater than that of the thermal insulation board but less than that of the fine stone concrete layer; the second crack-resistant board and the fine stone concrete layer share the load through a third cooperative structure.

2. The floating floor slab as described in claim 1, characterized in that: The first collaborative structure is an interleaved collaborative structure.

3. The floating floor slab as described in claim 1, characterized in that: The second collaborative structure is configured as the adhesive surface between the sound insulation pad and the first crack-resistant plate, and between the sound insulation pad and the second crack-resistant plate.

4. The floating floor slab as described in claim 1, characterized in that: The third collaborative structure is formed on the rough interlocking surface of the second crack-resistant plate; or, the third collaborative structure is a collaborative tie member that connects the second crack-resistant plate and the fine stone concrete layer.

5. The floating floor slab as described in claim 1, characterized in that: The sound-insulating rigid surface layer is formed by assembling multiple sound-insulating rigid modules; each sound-insulating rigid module includes a second crack-resistant plate and a sound-insulating pad layer, the sound-insulating pad layers of adjacent sound-insulating rigid modules are spliced ​​and bonded together, and a post-cast groove is formed between the second crack-resistant plates of adjacent sound-insulating rigid modules.

6. The floating floor slab as described in claim 5, characterized in that: The post-casting groove is equipped with post-casting structural components, and the fine aggregate concrete layer fills the post-casting groove.

7. The floating floor slab as described in claim 1, characterized in that: The first crack-resistant plate and the second crack-resistant plate are configured to satisfy at least one of the following performance parameters: Density: 400~600 kg / m³ 3 ; Compressive strength perpendicular to the plate surface: ≥0.1MPa; Flexural tensile strength: ≥0.8MPa; Flexural modulus: ≥250MPa; Mohs hardness: 2~3; Combustion performance: Grade A.

8. A construction method for a crack-resistant floating floor slab as described in any one of claims 1-7, characterized in that, Includes the following steps: The thermal insulation rigid base layer is laid on the structural floor slab, and the first crack-resistant plate of the thermal insulation rigid base layer is connected to the structural floor slab through a first cooperative structure; The sound-insulating rigid surface layer is laid on the thermal insulation rigid base layer, and the second crack-resistant plate of the sound-insulating rigid surface layer is connected to the thermal insulation rigid base layer in conjunction with the sound-insulating pad layer through a second cooperative structure. A fine aggregate concrete layer is cast in place on the second crack-resistant slab.

9. The construction method as described in claim 8, characterized in that, In the step of laying the sound insulation rigid surface layer on the thermal insulation rigid base layer, the second crack-resistant board and the sound insulation pad layer are assembled into a sound insulation rigid module according to standard dimensions, and adjacent sound insulation rigid modules are connected by adhesive to form the sound insulation rigid surface layer.

10. The construction method as described in claim 9, characterized in that: Adjacent sound-insulating rigid modules are bonded together with adhesive, which is configured to meet at least one of the following performance parameters: Elastic modulus: 0.15~0.3 MPa; After curing, Shore A hardness: 12-22; Elongation at break: ≥500%; Tensile strength: 0.35~0.60 MPa.

11. The construction method as described in claim 9, characterized in that, In the step of laying the sound-insulating rigid surface layer on the thermal insulation rigid base layer, the second crack-resistant plate and the sound-insulating pad layer are assembled into a sound-insulating rigid module according to standard dimensions, the sound-insulating pad layers of adjacent sound-insulating rigid modules are spliced ​​and bonded, and a post-pouring groove is formed between the second crack-resistant plates of adjacent sound-insulating rigid modules.

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