Precast concrete thermal insulation and soundproof floor slabs

Abstract

This invention discloses a prefabricated concrete thermal insulation and sound insulation floor slab, relating to the field of prefabricated floor slab technology. The prefabricated concrete thermal insulation and sound insulation floor slab includes a prefabricated base slab, one surface of which is provided with an insulation layer. A first thermal insulation and sound insulation board is provided on the insulation layer, arranged with open areas, the non-open areas of which are used for thermal insulation and sound insulation. A panel layer is cast onto the side of the prefabricated base slab near the first thermal insulation and sound insulation board, and the panel layer can fill the open areas. By contacting the insulation layer after casting, the contact area between the layers is increased, thereby improving the contact strength between the layers and forming a sandwich structure. This structure improves upon the traditional direct-coverage installation of insulation boards, not only increasing the connection strength between structures but also utilizing the low thermal conductivity of the first thermal insulation and sound insulation board to block the thermal bridging effect, thus significantly improving the thermal insulation and sound insulation effects.

Description

Technical Field

[0001] This invention relates to the field of precast floor slab technology, specifically to precast concrete thermal insulation and soundproof floor slabs. Background Technology

[0002] Prefabricated construction refers to the transfer of a large amount of on-site work from traditional construction methods to factories. Building components and accessories (such as floor slabs, wall panels, stairs, balconies, etc.) are prefabricated in factories, transported to the construction site, and assembled on-site using reliable connection methods. Due to its advantages such as standardized manufacturing, ease of large-scale production, and convenient construction, prefabricated construction has experienced rapid development in recent years. Prefabricated floor slabs, as a part of prefabricated construction, have also seen rapid development. Precast concrete floor slabs are widely used in prefabricated construction, reducing the use of formwork and improving construction efficiency.

[0003] Chinese patent CN114457950A discloses a prefabricated concrete floor slab and its production method. By fixing installation sleeves to the steel mesh, after the prefabricated base slab is poured, installation holes are reserved on the prefabricated base slab at the positions corresponding to the installation sleeves. Thus, the truss steel bars are separated from the installation sleeves during the transportation of the prefabricated base slab. When multiple prefabricated base slabs need to be spliced, or when the support steel bars are connected to the installation sleeves after splicing, the truss steel bars are promptly embedded in the cast-in-place layer, reducing the rusting phenomenon caused by the exposure of the truss steel bars to the external environment.

[0004] However, existing precast thermal insulation and soundproof floor slabs still have certain shortcomings in use. For example, the existing precast thermal insulation and soundproof floor slabs have obvious structural layers, usually concrete-insulation board-concrete structure. Although this structure has good thermal insulation and soundproof effect, after the concrete is poured, the contact surface between the concrete slab layers is small and the connection strength is poor, which leads to a decrease in the floor load. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides prefabricated concrete thermal insulation and soundproof floor slabs, which solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a precast concrete thermal insulation and soundproof floor slab, comprising a precast base slab, an insulation layer slab on one surface of the precast base slab, a first thermal insulation and soundproof board slab on the insulation layer slab, the first thermal insulation and soundproof board slab being arranged in a state with open areas, and the non-open areas of the first thermal insulation and soundproof board slab being used for thermal insulation and sound insulation; a panel layer, the panel layer being cast on the side of the precast base slab near the first thermal insulation and soundproof board slab, and the panel layer being able to fill the open areas.

[0007] Furthermore, the first thermal insulation and sound insulation board is provided in multiple sets, with multiple sets of the first thermal insulation and sound insulation board arranged side by side, and the first thermal insulation and sound insulation board and the precast base plate having an angle between them. There is an empty area between two adjacent sets of the first thermal insulation and sound insulation board, and two adjacent sets of the first thermal insulation and sound insulation board have an overlapping area in the orthographic projection direction of the precast base plate.

[0008] Furthermore, the first thermal insulation and sound insulation board includes a through groove, which is formed on the thermal insulation layer, and the area where the through groove is located is an empty area one; the third thermal insulation and sound insulation board is a block-shaped structure, and the third thermal insulation and sound insulation board is arranged on the side of the through groove near the panel layer, the third thermal insulation and sound insulation board does not contact the through groove, and the third thermal insulation and sound insulation boards are connected by a third longitudinal rib, and the area where the third longitudinal rib is located is an empty area two.

[0009] Furthermore, the size of the third thermal insulation and sound insulation board is larger than the size of the through groove, so that the non-empty area between the third thermal insulation and sound insulation board and the thermal insulation layer board has an overlapping part in the orthographic projection direction.

[0010] Furthermore, a shear-resistant steel reinforcement layer is provided between the precast base slab and the insulation layer. The shear-resistant steel reinforcement layer includes a first longitudinal bar, which is uniformly arranged within the precast base slab; a second longitudinal bar, which is uniformly arranged within the insulation layer, and the orthographic projections of the second longitudinal bar and the first longitudinal bar in the vertical direction are staggered; a transverse bar, which is arranged within the precast base slab and intersects with the first longitudinal bar, so that the first longitudinal bar and the transverse bar combine to form a mesh structure, and the two ends of the transverse bar are bent away from the precast base slab to form connecting bars; and a support bar, the lower end of which is located at the intersection, and the upper end of which is connected to the second longitudinal bar, forming a regular tetrahedral structure with each square of the mesh structure as its base.

[0011] Furthermore, a slab is provided at the bottom of one side of the precast base plate, and a toothed plate is provided in the middle section of the other side of the precast base plate. The slab and the toothed plate overlap between two adjacent precast base plates to form a second cast-in-place trench. A second thermal insulation and sound insulation board is installed above the second cast-in-place trench, and a gap is left between the second thermal insulation and sound insulation board and the second cast-in-place trench for the injection of cast-in-place concrete to strengthen the connection between two adjacent precast base plates.

[0012] Furthermore, a connector is installed inside the second cast-in-place trench. The connector includes a connecting frame fixed to the lower surface of the second thermal insulation and sound insulation board. Buffer sleeves are fixed at both ends of the lower surface of the connecting frame. The buffer sleeves are sleeved with connecting steel bars on two adjacent shear steel bar layers, and the gap between the buffer sleeves and the connecting steel bars is filled with paraffin-based material.

[0013] Furthermore, the precast base plate is provided with load-bearing beams at both ends, the load-bearing beams are provided with internal reinforcing steel bars, and the load-bearing beams are provided with stepped grooves, which overlap with the base plate; a first cast-in-place groove is formed between the two precast base plates on the same side and the load-bearing beams, the first cast-in-place groove is used for cast-in-place concrete injection to strengthen the connection between the precast base plate and the load-bearing beams.

[0014] Furthermore, both the insulation layer and the panel layer are made of lightweight aggregate concrete, and low thermal conductivity materials such as polystyrene particles or rubber particles are uniformly mixed in during the casting process.

[0015] Furthermore, a protective frame is detachably installed on the outside of the panel layer, which is used to protect the corners of the panel layer during transportation.

[0016] The present invention has the following beneficial effects:

[0017] (1) The prefabricated concrete thermal insulation and sound insulation floor slab is made into contact with the insulation layer after the panel layer is poured, thereby increasing the contact area between the layers, improving the contact strength between the layers and forming a sandwich structure. This structure improves the traditional direct covering installation of the insulation board, not only improving the connection strength between the structures, but also using the low thermal conductivity of the first thermal insulation and sound insulation board to block the thermal bridge effect, thereby greatly improving the thermal insulation and sound insulation effect.

[0018] (2) The prefabricated concrete thermal insulation and sound insulation floor slab increases the contact area between the floor slab and the cast-in-place concrete by setting the first thermal insulation and sound insulation board, and expands the thermal insulation and sound insulation range. The first thermal insulation and sound insulation board also serves as a skeleton, providing skeleton support for the panel layer and the insulation layer, thereby improving the structural strength of the floor slab. By setting the shear reinforcement layer, the connection strength between the panel layer, the insulation layer and the prefabricated base plate is strengthened, and the structural strength reduction caused by the layer of the slab is greatly reduced.

[0019] (3) The prefabricated concrete thermal insulation and sound insulation floor slab forms a three-dimensional skeleton between the reinforcing steel bars in the beam and the first longitudinal bar and the second longitudinal bar, providing a structural foundation for the cast-in-place concrete inside the first cast-in-place trench. By connecting the reinforcing steel bars and connecting frames, a longitudinal and transverse structure is formed, thereby providing a skeleton support for the cast-in-place concrete inside the second cast-in-place trench. This greatly reduces on-site concrete operations, improves environmental protection requirements, reduces the use of formwork and on-site supports, and further improves construction efficiency.

[0020] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0022] Figure 2This is an exploded view of Embodiment 1 of the present invention;

[0023] Figure 3 In this invention Figure 1 The main view;

[0024] Figure 4 This is a schematic diagram of the installation structure according to Embodiment 1 of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure during the installation process of Embodiment 1 of the present invention;

[0026] Figure 6 In this invention Figure 5 Side view;

[0027] Figure 7 In this invention Figure 4 Top view;

[0028] Figure 8 This is a schematic diagram of the connection structure between two adjacent prefabricated base plates in Embodiment 1 of the present invention;

[0029] Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle;

[0030] Figure 10 In Embodiment 1 of the present invention Figure 8 A partial side view;

[0031] Figure 11 This is a diagram showing the positional relationship between the second thermal insulation and soundproofing board and the connecting frame in Embodiment 1 of the present invention;

[0032] Figure 12 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0033] Figure 13 This is an exploded view of Embodiment 2 of the present invention;

[0034] Figure 14 For the present invention Figure 13 Another perspective view;

[0035] Figure 15 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention.

[0036] In the diagram, 1. Precast base slab; 2. Lap slab; 3. Toothed slab; 4. Insulation layer; 5. Shear reinforcement layer; 51. First longitudinal reinforcement; 52. Second longitudinal reinforcement; 53. Transverse reinforcement; 54. Support leg reinforcement; 55. Connecting reinforcement; 6. Panel layer; 7. First thermal insulation and soundproofing board; 8. Protective frame; 9. Load-bearing beam; 10. Step groove; 11. First cast-in-place trench; 12. Second cast-in-place trench; 13. Second thermal insulation and soundproofing board; 14. Reinforcing reinforcement inside the beam; 15. Buffer sleeve; 16. Connecting frame; 71. Through groove; 72. Third thermal insulation and soundproofing board; 73. Third longitudinal reinforcement. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The following reference Figure 1 - Figure 15 This invention describes the prefabricated concrete thermal insulation and soundproof floor slab provided by the present invention.

[0039] Example 1

[0040] Please see Figure 1 - Figure 12 This invention provides a technical solution: a precast concrete thermal insulation and soundproof floor slab, including a precast base slab 1, an insulation layer 4 on one side of the precast base slab 1, a first thermal insulation and soundproof board 7 on the insulation layer 4, the first thermal insulation and soundproof boards 7 being arranged side by side and spaced apart, arranged in a state with empty areas, and the non-empty areas of the first thermal insulation and soundproof boards 7 being used for thermal insulation and sound insulation, and also including a panel layer 6, the panel layer 6 being cast on the side of the precast base slab 1 near the first thermal insulation and soundproof board 7, and the panel layer 6 being able to fill the empty areas, preferably the first thermal insulation and soundproof board 7 being a polyurethane board. It should be noted that the precast base slab 1, the insulation layer 4 and the panel layer 6 involved in this solution are all precast structures, which are integral structures when they leave the factory, and are named in this solution because of their different materials and layers.

[0041] In this process, after the panel layer 6 is poured, it comes into contact with the insulation layer 4, thereby increasing the contact area between the layers to improve the contact strength and form a sandwich structure. This structure improves upon the traditional direct-coverage installation of insulation boards, not only increasing the connection strength between structures but also altering the heat flow path between the panel layer 6 and the insulation layer 4 by utilizing the low thermal conductivity of the first insulation and sound insulation board 7. This extends the heat flow path and maintains the temperature of the floor slab at the overall level, thus significantly improving the insulation and sound insulation effects. Furthermore, it should be noted that both the insulation layer 4 and the panel layer 6 are made of lightweight aggregate concrete, or foamed concrete. During the pouring process, polystyrene particles or rubber particles with low thermal conductivity are uniformly mixed in. This type of concrete is a common technical solution and is widely used in existing technologies, thus providing insulation and sound insulation effects. The insulation layer 4, the panel layer 6, and the first insulation and sound insulation board 7 work together to form a stable thermal insulation layer, balancing structural strength and thermal insulation requirements.

[0042] like Figure 2 As shown, the first thermal insulation and sound insulation board 7 provided in this embodiment is provided in multiple sets, which are arranged side by side, and there is an angle between the first thermal insulation and sound insulation board 7 and the precast base plate 1. There is an empty area between two adjacent sets of first thermal insulation and sound insulation boards 7, and there is an overlapping area between two adjacent sets of first thermal insulation and sound insulation boards 7 in the orthographic projection direction of the precast base plate 1. Preferably, reinforcing steel bars are provided inside the first thermal insulation and sound insulation board 7, and the reinforcing steel bars are arranged along the axial direction of the first thermal insulation and sound insulation board 7. It should be noted that the reinforcing steel bars are wrapped inside the first thermal insulation and sound insulation board 7, and the heat insulation of its outer surface can be improved by adding a heat insulation coating. To prevent heat loss, the structural strength of the first thermal insulation and sound insulation board 7 is improved by reinforcing steel bars, giving it a certain supporting effect and thus improving the overall structural strength of the floor slab. In addition, the two adjacent sets of first thermal insulation and sound insulation boards 7 have overlapping areas in the orthographic projection direction of the precast base slab 1, thereby achieving full coverage in the orthographic projection direction of the floor slab and improving the thermal insulation and sound insulation effect. Of course, sound and heat can also be conducted through the voids, but due to the thermal insulation and sound insulation capabilities of the insulation layer 4 and the panel layer 6, the heat and sound diffusion effect will be further reduced, thereby assisting the voids in thermal insulation and sound insulation.

[0043] like Figure 2 , Figure 4 and Figure 7 As shown, in order to improve the connection strength between the precast base plate 1 and the insulation layer 4, a shear-resistant steel reinforcement layer 5 is provided between the precast base plate 1 and the insulation layer 4.

[0044] The shear reinforcement layer 5 includes a first longitudinal reinforcement 51, a second longitudinal reinforcement 52, a transverse reinforcement 53, and a support reinforcement 54. The first longitudinal reinforcement 51 is evenly arranged in the precast base slab 1, and the second longitudinal reinforcement 52 is evenly arranged in the insulation layer 4. The second longitudinal reinforcement 52 and the first longitudinal reinforcement 51 are staggered in the vertical direction, that is, the second longitudinal reinforcement 52 is located between two adjacent first longitudinal reinforcements 51.

[0045] In addition, the horizontal reinforcement 53 is provided in the precast base slab 1, and the horizontal reinforcement 53 intersects with the first longitudinal reinforcement 51, so that the first longitudinal reinforcement 51 and the horizontal reinforcement 53 are combined to form a mesh structure. The two ends of the horizontal reinforcement 53 are bent away from the precast base slab 1 to form connecting reinforcement 55. The lower end of the support reinforcement 54 is provided at the intersection, and the upper end of the support reinforcement 54 is connected to the second longitudinal reinforcement 52, forming a regular tetrahedral structure with each square of the mesh structure as the bottom surface, thereby forming a stable steel cage structure. The entire shear reinforcement layer 5 penetrates the precast base slab 1 and the insulation layer 4, thereby improving the connection strength between the insulation layer 4 and the precast base slab 1, so as to avoid the decrease in connection strength due to different materials.

[0046] like Figure 3 , Figure 8 , Figure 9 and Figure 10 As shown in the figure, the precast base slab 1 provided in this embodiment has a bottom plate 2 on one side and a toothed plate 3 in the middle section of the other side. The bottom plate 2 and the toothed plate 3 between two adjacent precast base slabs 1 overlap to form a second cast-in-place groove 12. Preferably, the side of the bottom plate 2 facing the toothed plate 3 is a sloping structure, so that the cast-in-place concrete can penetrate into the space between the bottom plate 2 and the toothed plate 3 to improve the connection stability between the bottom plate 2 and the toothed plate 3. In addition, the maximum width of the toothed plate 3 is smaller than the width of the bottom plate 2 to increase the contact area between the cast-in-place concrete and the outside after injection, thereby improving the connection strength between two adjacent floor slabs.

[0047] To prevent significant heat loss at the second cast-in-place trench 12, a second thermal insulation and soundproofing board 13 is installed above the second cast-in-place trench 12. This avoids severe heat loss at the floor slab connection. A gap is left between the second thermal insulation and soundproofing board 13 and the second cast-in-place trench 12 for the injection of cast-in-place concrete to strengthen the connection between the two adjacent precast base slabs 1. After the cast-in-place concrete is injected, the gap can be filled with adhesive to improve the sealing of the floor slab connection.

[0048] like Figure 8 - Figure 11As shown, to further improve the connection strength between two adjacent floor slabs, a connector is installed inside the second cast-in-place trench 12 provided in this embodiment. The connector includes a connecting frame 16 fixed to the lower surface of the second thermal insulation and soundproofing board 13. Buffer sleeves 15 are fixed at both ends of the lower surface of the connecting frame 16. The buffer sleeves 15 are sleeved with the connecting steel bars 55 on the two adjacent shear reinforcement layers 5, and the gap between the buffer sleeves 15 and the connecting steel bars 55 is filled with paraffin-based material. In this scheme, the buffer sleeves 15 are flexible structures, and their inner diameter is twice the outer diameter of the connecting steel bars 55. The phase change heat absorption of paraffin-based materials reduces thermal stress and enhances interface density. The longitudinal and transverse structure is formed by connecting steel bars 55 and connecting frame 16, thereby providing skeletal support for cast-in-place concrete. In addition, in this scheme, the width of the first thermal insulation and sound insulation board 7 is preferably greater than the width of the panel layer 6 and the thermal insulation layer 4, so that both ends of the first thermal insulation and sound insulation board 7 extend into the interior of the second cast-in-place trench 12. Furthermore, the ends of multiple sets of first thermal insulation and sound insulation boards 7 form a toothed structure, which can increase the contact area with cast-in-place concrete and expand the thermal insulation and sound insulation range.

[0049] like Figure 4 - Figure 7 As shown, the precast base slab 1 provided in this embodiment is provided with load-bearing beams 9 at both ends. The load-bearing beams 9 are provided with internal reinforcing bars 14, and the load-bearing beams 9 are provided with stepped grooves 10. The stepped grooves 10 overlap with the precast base slab 1, thereby realizing the connection between the floor slab and the load-bearing beams 9. The first longitudinal bar 51 and the second longitudinal bar 52 extend to the load-bearing beams 9 at both ends and are connected to the internal reinforcing bars 14 through external steel wires and other connectors, so that the internal reinforcing bars 14 and the first longitudinal bar 51 and the second longitudinal bar 52 form a three-dimensional skeleton, providing a structural foundation for the subsequent cast-in-place concrete.

[0050] In this design, a first cast-in-place trench 11 is formed between the two precast base slabs 1 on the same side and the load-bearing beam 9. The first cast-in-place trench 11 is used for the injection of cast-in-place concrete to strengthen the connection between the precast base slab 1 and the load-bearing beam 9. Under this structure, the cast-in-place concrete only needs to be processed by wet methods in the first cast-in-place trench 11 and the second cast-in-place trench 12, which greatly reduces the on-site concrete preparation scenario, thereby improving the environmental protection effect and accelerating the construction cycle. In this scheme, the length of the panel layer 6 and the insulation layer 4 can be greater than the length of the precast base slab 1, so that one end of the panel layer 6 and the insulation layer 4 can extend into the interior of the first cast-in-place trench 11, thereby increasing the contact area between the cast-in-place concrete and the panel layer 6 and the insulation layer 4, realizing a stepped contact, and improving the contact stability.

[0051] like Figure 2 , Figure 4 and Figure 7As shown, a protective frame 8 is detachably installed on the outside of the panel layer 6. The protective frame 8 is used to protect the corners of the panel layer 6 during transportation. After the protective frame 8 is removed, the length and width of the panel layer 6 will be slightly smaller than the length and width of the insulation board 4. This results in gaps between the panel layer 6 and the first cast-in-place trench 11 and the second cast-in-place trench 12 after removal, so that concrete or glue can be injected and the connection effect at the first cast-in-place trench 11 and the second cast-in-place trench 12 can be improved.

[0052] During use (operation), after the floor slab is positioned, the lap plate 2 between two adjacent precast base slabs 1 is overlapped with the toothed plate 3. The connection between two adjacent connecting steel bars 55 is achieved through connectors. The second thermal insulation and sound insulation board 13 is installed at the second cast-in-place trench 12. Then, cast-in-place concrete is injected into the first cast-in-place trench 11 and the second cast-in-place trench 12 to achieve the connection between floor slabs and between floor slabs and load-bearing beams 9. A three-dimensional skeleton is formed between the reinforcing steel bars 14 in the beam and the first longitudinal bar 51 and the second longitudinal bar 52, providing a structural foundation for the cast-in-place concrete inside the first cast-in-place trench 11. The longitudinal and transverse structures are formed through the connecting steel bars 55 and the connecting frame 16, thereby providing skeletal support for the cast-in-place concrete inside the second cast-in-place trench 12, thereby significantly reducing on-site concrete work and improving environmental protection requirements.

[0053] After the panel layer 6 is poured, it comes into contact with the insulation layer 4, thereby increasing the contact area between the layers, improving the contact strength between the layers and forming a sandwich structure. This structure improves the traditional direct covering installation of insulation boards, not only improving the connection strength between structures, but also using the low thermal conductivity of the first insulation and sound insulation board 7 to block the thermal bridge effect, thereby greatly improving the insulation and sound insulation effect.

[0054] Example 2

[0055] Please see Figure 12 - Figure 15 This invention provides a technical solution that differs from Embodiment 1 in that:

[0056] like Figure 12 - Figure 15 As shown, the first thermal insulation and sound insulation board 7 provided in this embodiment includes a through groove 71, which is opened on the thermal insulation board 4, and the area where the through groove 71 is located is an empty area.

[0057] The first thermal insulation and sound insulation board 7 provided in this embodiment also includes a third thermal insulation and sound insulation board 72. The third thermal insulation and sound insulation board 72 has a block-shaped structure and is arranged on the side of the through groove 71 near the panel layer 6. The third thermal insulation and sound insulation board 72 does not contact the through groove 71, and the third thermal insulation and sound insulation boards 72 are connected by a third longitudinal rib 73. The area where the third longitudinal rib 73 is located is an empty area two. Preferably, a fourth thermal insulation and sound insulation board corresponding to the third thermal insulation and sound insulation board 72 is provided on the thermal insulation layer 4 so that the third thermal insulation and sound insulation board 72 and the fourth thermal insulation and sound insulation board can completely cover the thermal insulation layer 4, thereby improving the thermal insulation and sound insulation effect. As a result, the shape of the through groove 71 corresponds to the shape of the third thermal insulation and sound insulation board 72, but it is not limited to a square structure. It can also be a circular, elliptical, polygonal, or other structures. Preferably, the surface of the third longitudinal reinforcement 73 is treated with a heat insulation coating to reduce heat loss. It should be noted that the third longitudinal reinforcement 73 does not contact the shear reinforcement layer 5. Its significance lies in the fact that the third longitudinal reinforcement 73 can increase the layer height of the third thermal insulation and sound insulation board 72, leaving a gap between the third thermal insulation and sound insulation board 72 and the through groove 71, so that concrete can flow into the through groove 71 through the gap when it is poured. In addition, the third longitudinal reinforcement 73 can enhance the overall structural strength of the panel layer 6.

[0058] In this design, during the pouring of panel layer 6, concrete flows into and fills the voids in voids two and one, thereby increasing the contact area between panel layer 6 and insulation board 4. Additionally, concrete in one void may come into contact with the shear reinforcement layer 5, further stabilizing the connection between panel layer 6, insulation board 4, and precast base slab 1. It should be noted that because panel layer 6 and insulation board 4 themselves possess insulation properties, their thermal conductivity is relatively low after contact with the shear reinforcement layer 5, preventing thermal runaway. To address heat loss, a further solution is to spray a heat-insulating coating on the contact area between the outer surface of the shear reinforcement layer 5 and the panel layer 6 and insulation board 4 to enhance the insulation effect. In addition, by cooperating with the third and fourth heat-insulating and sound-insulating boards, the insulation board 4 can be fully covered by its vertical projection to improve the heat insulation and sound insulation effect. Finally, the setting of the third longitudinal reinforcement 73 can not only connect the third heat-insulating and sound-insulating board 72, but also improve the structural strength of the entire floor slab, thereby improving the load-bearing capacity of the floor slab.

[0059] like Figure 13 As shown, in order to further improve the thermal insulation and sound insulation effect, the size of the third thermal insulation and sound insulation board 72 provided in this embodiment is larger than the size of the through groove 71, so that the non-empty area between the third thermal insulation and sound insulation board 72 and the thermal insulation layer board 4 has an overlapping part in the orthographic projection direction. In addition, in this solution, it is preferred that the two ends of the third longitudinal rib 73 are connected to the protective frame 8, and the connection method is clearance fit, so as to facilitate the later disassembly of the protective frame 8.

[0060] During use (operation), when the panel layer 6 is poured, the concrete flows into and fills the voids 2 and 1, thereby increasing the contact area between the panel layer 6 and the insulation board 4. In addition, the concrete in one void may come into contact with the shear reinforcement layer 5, which can make the connection between the panel layer 6, the insulation board 4 and the precast base slab 1 more stable. Furthermore, by cooperating with the third and fourth thermal insulation and sound insulation boards, the insulation board 4 is fully covered by its vertical projection, thereby improving the thermal insulation and sound insulation effect. Finally, the setting of the third longitudinal reinforcement 73 can not only connect the third thermal insulation and sound insulation board 72, but also improve the structural strength of the entire floor slab, thereby improving the load-bearing capacity of the floor slab.

[0061] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A precast concrete thermal insulation and soundproof floor slab, characterized in that, include: A precast base plate (1) is provided with a thermal insulation layer (4) on one surface of the precast base plate (1). A first thermal insulation and sound insulation board (7) is provided on the thermal insulation layer (4). The first thermal insulation and sound insulation board (7) is arranged in a state with empty areas, and the non-empty areas of the first thermal insulation and sound insulation board (7) are used for thermal insulation and sound insulation. Panel layer (6), which is cast on the side of the precast base plate (1) near the first thermal insulation and sound insulation board (7), and the panel layer (6) can fill the void area; Through groove (71), the through groove (71) is opened on the insulation layer plate (4), and the area where the through groove (71) is located is an empty area; The third thermal insulation and sound insulation board (72) is a block-shaped structure, and the third thermal insulation and sound insulation board (72) is arranged on the side of the through groove (71) near the panel layer (6). The third thermal insulation and sound insulation board (72) does not contact the through groove (71), and the third thermal insulation and sound insulation boards (72) are connected by the third longitudinal rib (73). The area where the third longitudinal rib (73) is located is the second empty area.

2. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 1, characterized in that: The size of the third thermal insulation and sound insulation board (72) is larger than the size of the through groove (71), so that the non-empty area between the third thermal insulation and sound insulation board (72) and the thermal insulation layer board (4) has an overlapping part in the orthographic projection direction.

3. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 2, characterized in that, It also includes a shear reinforcement layer (5), which includes: The first longitudinal reinforcement (51) is evenly distributed within the precast base plate (1); The second longitudinal rib (52) is evenly arranged in the insulation board (4), and the second longitudinal rib (52) and the first longitudinal rib (51) are staggered in the vertical direction. The horizontal reinforcement (53) is provided in the precast base plate (1), and the horizontal reinforcement (53) and the first longitudinal reinforcement (51) have an intersection point so that the first longitudinal reinforcement (51) and the horizontal reinforcement (53) are combined to form a mesh structure. The two ends of the horizontal reinforcement (53) are bent in the direction away from the precast base plate (1) to form connecting reinforcement (55). The lower end of the support leg steel bar (54) is located at the intersection, and the upper end of the support leg steel bar (54) is connected to the second longitudinal bar (52) to form a regular tetrahedral structure with each square of the mesh structure as the bottom surface.

4. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 3, characterized in that: The precast base plate (1) has a bottom plate (2) on one side and a toothed plate (3) in the middle section of the other side. The bottom plate (2) between two adjacent precast base plates (1) overlaps with the toothed plate (3) to form a second cast-in-place trench (12). A second thermal insulation and sound insulation board (13) is installed above the second cast-in-place trench (12), and a gap is left between the second thermal insulation and sound insulation board (13) and the second cast-in-place trench (12) for the injection of cast-in-place concrete to strengthen the connection between the two adjacent precast base plates (1).

5. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 4, characterized in that: The second cast-in-place trench (12) is equipped with a connector, which includes a connecting frame (16) fixed to the lower surface of the second thermal insulation and sound insulation board (13). Both ends of the lower surface of the connecting frame (16) are fixed with buffer sleeves (15). The buffer sleeves (15) are sleeved with the connecting steel bars (55) on the two adjacent shear steel bar layers (5), and the gap between the buffer sleeves (15) and the connecting steel bars (55) is filled with paraffin-based material.

6. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 5, characterized in that: The precast base plate (1) is provided with load-bearing beams (9) at both ends. The load-bearing beams (9) are provided with internal reinforcing steel bars (14), and the load-bearing beams (9) are provided with step grooves (10). The step grooves (10) overlap with the base plate (1). A first cast-in-place groove (11) is formed between the two precast base plates (1) on the same side and the load-bearing beam (9). The first cast-in-place groove (11) is used for the injection of cast-in-place concrete to strengthen the connection between the precast base plate (1) and the load-bearing beam (9).

7. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 6, characterized in that: Both the insulation layer (4) and the panel layer (6) are made of lightweight aggregate concrete and are uniformly mixed with low thermal conductivity materials such as polystyrene particles or rubber particles during the pouring process.

8. The prefabricated concrete thermal insulation and soundproof floor slab according to claim 7, characterized in that: A protective frame (8) is detachably installed on the outside of the panel layer (6), and the protective frame (8) is used to protect the corners of the panel layer (6) during transportation.

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