Support-free prefabricated concrete rib closely-spliced laminated slab and building

Abstract

The utility model belongs to the technical field of laminated slabs, and particularly relates to a support-free prefabricated concrete rib closely-spliced laminated slab and a building, the support-free prefabricated concrete rib closely-spliced laminated slab comprises a bottom plate and a rib plate, the rib plate is fixed on the upper surface of the bottom plate, an auxiliary connecting unit is arranged in the rib plate, and at least part of the auxiliary connecting unit is located in the bottom plate. The utility model has the advantages of strong integrality, good crack resistance, high bearing capacity and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of laminated plates, and particularly relates to a precast concrete rib closely assembled laminated plate without support and a building. Background Technique

[0002] As an advanced floor slab system, precast laminated plates are widely used in the field of construction engineering. This technology combines the advantages of precast components and in-situ casting, and usually consists of a bottom slab precast in the factory and a concrete layer cast on-site. Precast laminated plates can significantly improve construction efficiency, reduce on-site work volume, and ensure construction quality.

[0003] However, there are still some limitations in the existing precast laminated plates. Firstly, the connection strength between the precast bottom slab and the cast-in-place layer is often insufficient, which may affect the performance of the overall structure. Secondly, the insulation performance of traditional precast laminated plates is poor, making it difficult to meet the increasingly strict building energy-saving requirements. In addition, during transportation and installation, the precast bottom slab is prone to damage, increasing project costs and construction risks.

[0004] To solve the above technical problems, Chinese Utility Model Patent CN218714201U discloses a new type of assembled high-ductility concrete laminated floor slab. The floor slab includes a first combination body and a second combination body, wherein the first combination body is composed of a PVA fiber concrete bottom slab, plate ribs, perforations, and reinforcing steel belts. Although this design improves the performance of the laminated floor slab to a certain extent, there are still deficiencies. Its PVA fiber concrete bottom slab and rib plate are an integrally cast structure, with poor integrity, low crack resistance, and insufficient bearing capacity. These defects limit its application in high-demand buildings.

[0005] Therefore, there is an urgent need for an improved precast laminated plate to solve the above technical problems, improve the overall performance of the structure, enhance the insulation effect, and improve the safety during transportation and installation. The present invention aims to overcome the deficiencies of the prior art and provide a more optimized and efficient precast laminated plate solution for construction engineering to meet the high standards of modern buildings for structural performance, energy-saving requirements, and construction safety. Content of the Utility Model

[0006] Aiming at the problems existing in the background technique, the purpose of the present utility model is to provide a precast concrete rib closely assembled laminated plate without support and a building, which have the advantages of strong integrity, good crack resistance, high bearing capacity, etc.

[0007] To achieve the above purpose, the present utility model discloses a precast concrete rib closely assembled laminated plate without support, including a bottom slab and rib plates. The rib plates are fixed on the upper surface of the bottom slab, and an auxiliary connection unit is arranged inside the rib plates, and at least part of the auxiliary connection unit is located inside the bottom slab.

[0008] In a preferred embodiment of the present utility model, the auxiliary connection unit is a plurality of U-shaped steel bars, and the plurality of U-shaped steel bars are arranged at intervals along the length direction of the rib plate.

[0009] In a preferred embodiment of the present utility model, a plurality of rectangular holes are arranged at intervals along the length direction of the rib plate, and the rectangular holes do not intersect with the U-shaped steel bars.

[0010] In a preferred embodiment of the present utility model, the bottom plate includes a lower plate body part and an upper plate body part. The width of the lower plate body part is greater than the width of the upper plate body part. A plurality of horizontally distributed steel bars are arranged in the lower plate body part, and a plurality of longitudinally stressed steel bars are arranged in the upper plate body part. The horizontally distributed steel bars and the longitudinally stressed steel bars are arranged perpendicular to each other.

[0011] In a preferred embodiment of the present utility model, the length of the horizontally distributed steel bars is greater than the width of the upper plate body part and less than the width of the lower plate body part. The horizontally distributed steel bars include exposed parts that extend out of the upper plate body part and are located on the surface of the lower plate body part.

[0012] In a preferred embodiment of the present utility model, it further includes a spliced longitudinal auxiliary steel bar 8, and the longitudinal auxiliary steel bar 8 is used for connecting the exposed parts of the horizontally distributed steel bars 5 between two adjacent upper plate body parts 12 of two precast concrete rib closely spliced and laminated plates.

[0013] In a preferred embodiment of the present utility model, the central symmetry axes of the lower plate body part and the upper plate body part are coaxially arranged.

[0014] In a preferred embodiment of the present utility model, the thickness of the lower plate body part corresponds to the thickness of the upper plate body part.

[0015] In a preferred embodiment of the present utility model, the length of the lower plate body part is not less than the length of the upper plate body part.

[0016] The present utility model also discloses a building, including at least one unsupported precast concrete rib closely spliced and laminated plate.

[0017] In a preferred embodiment of the present utility model, the lower plate body parts of two adjacent precast concrete rib closely spliced and laminated plates are mutually attached along the width direction. The horizontally distributed steel bars of two adjacent precast concrete rib closely spliced and laminated plates are arranged in one-to-one correspondence. Two horizontally distributed steel bars located on the same axis are welded and connected through a transverse auxiliary steel bar. Two adjacent horizontally distributed steel bars on each precast concrete rib closely spliced and laminated plate are welded and connected through a longitudinal auxiliary steel bar. Two adjacent longitudinal auxiliary steel bars on two precast concrete rib closely spliced and laminated plates are arranged in a staggered manner.

[0018] The beneficial effects of the present utility model are as follows: The improved precast composite slab provided by the present invention successfully solves many problems existing in the prior art, demonstrating remarkable technical effects and comprehensive advantages. In terms of structural performance, through optimized design, the present invention realizes the effective combination of the bottom slab, rib slab and cast-in-place layer, greatly improving the overall structural stability and integration degree. By adopting advanced material formulations and innovative structural designs, not only the crack resistance of the precast composite slab is effectively improved, preventing the generation and expansion of cracks, but also its bearing capacity is significantly enhanced, enabling it to adapt to more complex and stringent building requirements and providing more reliable support for high-rise buildings and long-span structures.

[0019] In terms of construction efficiency, the precast composite slab of the present invention has achieved a qualitative leap. Its unique design allows for less or no support construction, greatly reducing on-site support work and accelerating the construction progress. There are no steel bars protruding from the edges of the precast slab around its perimeter. This feature simplifies the precast process, making the precast formwork design simpler and reusable, effectively reducing material waste. In addition, the precast composite slab of the present invention is convenient for hoisting and transportation, greatly reducing the damage risk during transportation. After arriving at the construction site, its design features make the installation process extremely simple. The on-site workers only need to perform close splicing, which not only reduces the construction time but also lowers the labor intensity.

[0020] The present invention has also made remarkable progress in terms of economy and sustainability. By optimizing the material composition and structural design, the heat insulation effect of the precast composite slab has been greatly improved, effectively increasing the thermal resistance value and meeting the increasingly stringent energy-saving requirements of modern buildings. At the same time, by simplifying the construction process, reducing material waste and improving construction efficiency, the present invention effectively controls the overall project cost. More importantly, its excellent crack resistance and integrity significantly improve the long-term durability of the building structure and extend the service life of the building.

[0021] In terms of safety and adaptability, the present invention also performs outstandingly. Through structural optimization, the anti-damage ability of the precast composite slab is significantly enhanced, greatly reducing the risks during transportation and installation. Its excellent performance and high bearing capacity enable it to be applicable to various complex building structures and environmental conditions, demonstrating extremely strong adaptability.

[0022] Finally, the present invention also has outstanding performance in terms of production and construction flexibility. The simple precast formwork design supports large-scale and high-efficiency standardized production, and its less or no support feature enables it to adapt to various construction conditions, providing more choices and flexibility for builders.

[0023] In summary, the precast composite slab of the present invention has achieved comprehensive improvement and optimization in terms of structural performance, construction efficiency, economy, safety, adaptability, and production and construction flexibility. It has not only successfully solved many problems existing in traditional precast composite slabs, but also provided a comprehensively optimized, efficient and reliable solution for modern construction projects, fully meeting the strict requirements of contemporary buildings for high performance, high efficiency and sustainability, and injecting new vitality into the development of the construction industry. Brief Description of the Drawings

[0024] Figure 1 is a schematic diagram of the present utility model;

[0025] Figure 2 is a top view of the present utility model;

[0026] Figure 3 is a bottom view of the present utility model;

[0027] Figure 4 is a side view of the present utility model;

[0028] Figure 5 is a schematic diagram of the U-shaped steel bar structure of the present utility model;

[0029] Figure 6 is a front view of the U-shaped steel bar of the present utility model;

[0030] Figure 7 is an axonometric view of the U-shaped steel bar of the present utility model;

[0031] Figure 8 is a schematic diagram of the transverse distribution steel bar + longitudinal distribution steel bar structure of the present utility model;

[0032] Figure 9 is a schematic diagram of the installation position of the longitudinal auxiliary steel bar of the present utility model;

[0033] Figure 10 is a schematic diagram of the longitudinal auxiliary steel bar of the present utility model;

[0034] Figure 11 is a schematic diagram of the longitudinal auxiliary steel bar of the present utility model. Detailed Description of the Preferred Embodiments

[0035] The technical solutions (including the preferred technical solutions) of the present utility model will be further described in detail below by way of the accompanying drawings and by listing some alternative embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.

[0036] As Figures 1-5 shown, the precast concrete ribbed closely assembled composite slab of the present invention mainly consists of a bottom plate 1 and rib plates 3. The rib plates 3 are firmly fixed on the upper surface of the bottom plate 1 to form an integral structure. In order to enhance the stability and load-bearing capacity of the overall structure, auxiliary connection units are provided inside the rib plates 3, and the design of these auxiliary connection units enables at least part of them to be located inside the bottom plate 1, thereby achieving an effective connection between the bottom plate and the rib plates.

[0037] In a preferred embodiment, a plurality of U-shaped steel bars 7 are adopted as the auxiliary connection units. These U-shaped steel bars 7 are arranged at intervals along the length direction of the rib plates 3, which not only enhances the strength of the rib plates but also improves the connection strength between the rib plates and the bottom plate. The design of the U-shaped steel bars ingeniously solves the problem of insufficient connection between the bottom plate and the rib plates in traditional precast composite slabs.

[0038] To further optimize the structural performance, a plurality of rectangular holes 4 are provided on the rib plates 3. These rectangular holes are arranged at intervals along the length direction of the rib plates, and their positions are carefully designed to ensure that they do not intersect with the U-shaped steel bars 7. This design not only reduces the structural weight but also provides good bonding conditions for the subsequent on-site casting of concrete, further enhancing the integrity of the overall structure.

[0039] The design of the bottom plate 1 also reflects the innovation of the present invention. The bottom plate 1 includes a lower plate body part 11 and an upper plate body part 12, wherein the width of the lower plate body part 11 is greater than the width of the upper plate body part 12. This design not only increases the stability of the bottom plate but also facilitates the connection of adjacent plates. A plurality of horizontally distributed steel bars 5 are provided inside the lower plate body part 11, while a plurality of longitudinally stressed steel bars 6 are provided on the upper plate body part 12. The horizontally distributed steel bars 5 and the longitudinally stressed steel bars 6 are arranged perpendicular to each other to form a strong steel bar grid structure, significantly improving the load-bearing capacity and crack resistance of the bottom plate.

[0040] It should be noted that the length of the horizontally distributed steel bars 5 is carefully designed to be greater than the width of the upper plate body part 12 but less than the width of the lower plate body part 11. The horizontally distributed steel bars 5 include exposed parts, and the exposed parts extend out of the upper plate body part 12 and are located on the surface of the lower plate body part 11. This design not only ensures the effective coverage of the entire upper plate body part by the steel bars but also avoids the exposure of the steel bars, facilitating prefabrication and transportation.

[0041] To ensure the symmetry and stability of the structure, the central symmetry axes of the lower plate body part 11 and the upper plate body part 12 are arranged coaxially. At the same time, the thickness of the lower plate body part 11 corresponds to the thickness of the upper plate body part 12, ensuring the coordination of the overall structure. In addition, the length of the lower plate body part 11 is not less than the length of the upper plate body part 12, and this design provides greater flexibility for the connection of adjacent plates.

[0042] The present invention also discloses a building structure using the above-mentioned precast concrete ribbed closely-fitted composite slab. In this structure, the lower plate bodies 11 of two adjacent precast concrete ribbed closely-fitted composite slabs are mutually fitted along the width direction to form a seamless connection. The transverse distribution steel bars 5 of adjacent slabs are arranged in one-to-one correspondence, and two transverse distribution steel bars 5 located on the same axis are welded and connected through transverse auxiliary steel bars, ensuring the integrity of the structure.

[0043] As Figures 8-11 shown, in order to further enhance the structural strength, spliced longitudinal auxiliary steel bars 8 are also provided. The longitudinal auxiliary steel bars 8 are used to connect the exposed parts of the transverse distribution steel bars 5 between two adjacent upper plate bodies 12 between two precast concrete ribbed closely-fitted composite slabs. Two adjacent transverse distribution steel bars 5 on each precast concrete ribbed closely-fitted composite slab are welded and connected through longitudinal auxiliary steel bars 8. It should be noted that two adjacent longitudinal auxiliary steel bars 8 on two precast concrete ribbed closely-fitted composite slabs are arranged in a staggered manner. This ingenious design not only enhances the integrity of the structure but also improves the shear resistance. In some embodiments, the structure after the installation of the longitudinal auxiliary steel bars 8 is as Figure 10 shown, the longitudinal auxiliary steel bars 8 and the transverse distribution steel bars 5 form a continuous bent shape; in some other embodiments, the structure of the longitudinal auxiliary steel bars is as Figure 11 shown. In terms of part numbers, Figure 11 the serial number of the longitudinal auxiliary steel bar is 9 in order to distinguish it from the structure of the longitudinal auxiliary steel bar 8 different from that in the previous embodiment. The longitudinal auxiliary steel bar is a continuous H shape. Whether it is the structural form of the longitudinal auxiliary steel bar with serial number 9 or the structure of serial number 8, their connection with the exposed parts of the transverse distribution steel bars 5 can adopt a binding connection or a welded structure.

[0044] In a preferred embodiment, the edge of the concrete floor slab has a stepped structure. To make the edge of the concrete floor slab into a stepped shape, the ultra-high performance concrete rib with rectangular holes is an ultra-high performance concrete reinforced rib, and the concrete rib has rectangular holes of the same size. The U-shaped steel bar is a steel bar with a special shape after processing, and its function is to be placed at the concrete rib, and its lower steel bar extends into the concrete floor slab. Each concrete rib is evenly arranged with U-shaped steel bars, and no U-shaped steel bars need to be arranged at the holes of the concrete rib.

[0045] In a preferred embodiment, the soil rib is an ultra-high performance concrete rib, which is made of ultra-high performance concrete, and longitudinal steel bars and U-shaped steel bars are arranged inside. The U-shaped steel bars need to be placed in the ultra-high performance concrete rib 3 and the concrete floor slab to connect the two together.

[0046] In a preferred embodiment, the thickness of the bottom slab 1 made of concrete is not less than 40 mm. The thickness of the stepped structure at the edge of the concrete floor slab is reduced according to the thickness of the concrete floor slab, and half of the thickness of the concrete floor slab is taken.

[0047] Through the above design, the precast concrete ribbed closely assembled composite slab of the present invention achieves high strength, high stability, easy installation and good overall performance. It not only solves the problems existing in traditional precast composite slabs, but also provides an innovative and efficient solution for modern construction projects.

[0048] It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present utility model and does not limit the present utility model. Any modifications, combinations, substitutions, improvements, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims

1. A support-free prefabricated concrete rib-jointed composite slab, comprising a base plate (1) and a rib plate (3), wherein the rib plate (3) is fixed to the upper surface of the base plate (1), characterized in that: An auxiliary connection unit is provided in the rib plate (3), and the auxiliary connection unit is at least partially located in the bottom plate (1); the auxiliary connection unit is a plurality of "X"-shaped steel bars (7), and the plurality of "X"-shaped steel bars (7) are arranged at intervals along the length direction of the rib plate (3); the rib plate (3) is provided with a plurality of rectangular holes (4) arranged at intervals along the length direction thereof, and the rectangular holes (4) do not intersect with the "X"-shaped steel bars (7); the bottom plate (1) comprises a lower plate body (11) and an upper plate body (12), and the width of the lower plate body (11) is greater than that of the upper plate body The lower plate body (11) is provided with a plurality of transverse distribution steel bars (5), and the upper plate body (12) is provided with a plurality of longitudinal force-bearing steel bars (6), and the transverse distribution steel bars (5) and the longitudinal force-bearing steel bars (6) are arranged perpendicular to each other; the length of the transverse distribution steel bars (5) is greater than the width of the upper plate body (12), the length of the transverse distribution steel bars (5) is less than the width of the lower plate body (11), and the transverse distribution steel bars (5) include an exposed portion, and the exposed portion extends out of the upper plate body (12) and is located on the surface of the lower plate body (11).

2. The support-free prefabricated concrete rib-closed composite slab according to claim 1 is characterized in that: The central symmetry axis of the lower plate body (11) and the central symmetry axis of the upper plate body (12) are coaxially arranged.

3. The support-free prefabricated concrete rib-closed composite slab according to claim 1 is characterized in that: It also includes spliced ​​longitudinal auxiliary steel bars (8), which are used to connect the exposed parts of the transverse distribution steel bars (5) between two adjacent upper plate bodies (12) between two prefabricated concrete rib densely spliced ​​composite plates.

4. The support-free prefabricated concrete rib-closed composite slab according to claim 1 is characterized in that: The length of the lower plate body (11) is not less than the length of the upper plate body (12).

5. A building, characterized in that: It comprises at least one support-free prefabricated concrete rib densely spliced ​​composite slab as described in any one of claims 1 to 4.

6. The building according to claim 5, characterized in that: The lower plate bodies (11) of two adjacent precast concrete rib-closed composite plates are fitted together in the width direction, the transverse distribution steel bars (5) of the two adjacent precast concrete rib-closed composite plates are arranged in a one-to-one correspondence, the two transverse distribution steel bars (5) located on the same axis are welded and connected via transverse auxiliary steel bars, the two adjacent transverse distribution steel bars (5) on each precast concrete rib-closed composite plate are welded and connected via longitudinal auxiliary steel bars (8), and the two adjacent longitudinal auxiliary steel bars (8) on the two precast concrete rib-closed composite plates are arranged in a staggered manner.

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