Fully prefabricated assembled floor

Abstract

The present invention discloses a fully prefabricated assembled floor slab, wherein the floor slab is formed by splicing two or more prefabricated floor slabs, wherein the joint of the two prefabricated floor slabs is a tooth-groove structure, and the two prefabricated floor slabs are meshed with each other through the tooth-groove; and more than two connecting fixtures are arranged between the two prefabricated floor slabs. The above-mentioned fully prefabricated assembled floor slab is adopted, wherein the two prefabricated floor slabs are spliced ​​through the tooth-groove structure and connected by a plurality of connecting fixtures, which greatly increases the in-plane shear stiffness and bearing capacity of the floor slab. The fixed connecting fixtures can improve the in-plane bending bearing capacity of the fully assembled floor slab, and ensure the coordination of the out-of-plane deformation of the floor slab, so as to avoid cracking of the floor slab joints to affect the aesthetics of use, and the structure is simple and the on-site construction is relatively convenient.

Description

Technical Field

[0001] The invention relates to the field of construction, and in particular to a fully prefabricated assembled floor slab. Background Art

[0002] The floor slab is one of the important horizontal components of the building structure, and its main functions include two. First, under normal use conditions, it bears vertical loads such as the floor slab's own weight, decoration load, and service load, and transfers them to load-bearing components such as beams and columns; second, when the building is subjected to horizontal loads such as wind loads or earthquake loads, it effectively transfers the horizontal load of the floor to the lateral force resistance system of the building structure through its own in-plane stiffness and bearing capacity.

[0003] The existing floor forms mainly include cast-in-place floor, steel truss floor slab, composite floor slab, etc. Among them, cast-in-place floor requires a lot of on-site formwork and concrete pouring wet work, which does not meet the requirements of rapid industrialized construction and green environmental protection concepts. Steel truss floor slab and composite floor slab are both forms of prefabricated assembled floor slabs, and several problems have been found in their applications in the past few years. Steel truss floor slabs are relatively successful in public buildings, but they are greatly restricted in residential buildings because the bottom film galvanized steel plate affects the appearance of use. Although the composite floor slab has good aesthetics and mechanical properties, in order to ensure the integrity of the composite slab, the thickness of the floor slab is generally greater than 150mm, so it is not suitable for residential buildings where the floor slab thickness is generally 100-120mm. Steel truss floor slabs and composite floor slabs have the advantages of rapid industrialized construction to a certain extent, but the amount of on-site concrete wet work is still large.

[0004] Based on the above situation, the present invention proposes a fully prefabricated assembled floor structure suitable for steel structure or steel-concrete composite structure housing. The fully prefabricated assembled floor can be fully factory-produced and assembled on-site, with extremely high installation speed and environmental protection. For the convenience of transportation, the width of the floor will be limited to a certain extent, so it is inevitable that joints will be required between the prefabricated floor parts on site.

[0005] The existence of floor joints affects the integrity of the floor, greatly weakening the in-plane shear resistance, bending stiffness and bearing capacity of the floor; and the floor slabs on both sides of the joints may also deform uncoordinatedly when subjected to uneven vertical loads, resulting in cracks in the decoration at the joints, affecting the appearance of use. In order to solve the above problems, the present invention proposes a joint structure of a fully prefabricated assembled floor, which can significantly improve the in-plane shear resistance, bending stiffness and bearing capacity of the fully prefabricated assembled floor, and ensure that the deformation at the joints is coordinated when subjected to vertical loads. Overall, it can achieve performance similar to that of a cast-in-place integral floor. Summary of the invention

[0006] In order to overcome the above-mentioned defects, the object of the present invention is to provide a fully prefabricated assembled floor slab.

[0007] To achieve the above-mentioned purpose, the present invention provides a fully prefabricated assembled floor, wherein the floor is formed by splicing two or more prefabricated floor, wherein the joint between two adjacent prefabricated floor is a tooth-groove structure, and the two adjacent prefabricated floor are meshed with each other through the tooth grooves; and a plurality of connecting fixings are arranged between the two adjacent prefabricated floor.

[0008] Preferably, the connecting fixture is connected in the following manner:

[0009] A connecting hole is provided at a corresponding position of each prefabricated floor slab joint;

[0010] An open groove is provided at the position corresponding to the connecting hole at each prefabricated floor slab joint, and the other end of the connecting hole is located in the open groove;

[0011] A connecting piece passes through the connecting hole to connect the two prefabricated floor slabs; a grouting joint is provided between the outer wall of the connecting piece and the inner wall of the connecting hole;

[0012] The two ends of the connecting piece are located in the opening grooves of the two prefabricated floor slabs;

[0013] High-strength grouting material connected to the connecting piece is poured into each open groove.

[0014] Preferably, the connecting member is a connecting rod, and fixing members are provided at both ends of the connecting rod.

[0015] Preferably, the connecting rod is a connecting bolt, a nut is threaded on the connecting bolt, and the fixing piece is fixed on the connecting bolt through the nut;

[0016] Or the connecting rod is provided with a connecting buckle, and the fixing piece is fixed on the connecting rod through the buckle fixing piece

[0017] Or the connecting rod is a steel cable, and the fixing piece is fixed on the steel cable through a buckle fixing piece.

[0018] Preferably, the connecting fixings are provided with corresponding tooth grooves.

[0019] Preferably, the tooth groove structure is a dovetail tooth groove structure.

[0020] Preferably, a U-shaped steel bar may be arranged in the tooth groove to increase the bearing capacity of the tooth groove.

[0021] The above-mentioned fully prefabricated assembled floor slab is adopted, and two prefabricated floor slabs are spliced ​​by the tooth groove structure. The tooth groove structure significantly improves the in-plane shear bearing capacity and rigidity; it is connected by multiple connecting fixings, so that the bending rigidity and bearing capacity of the fully prefabricated joint floor slab are significantly improved, and at the same time, it can coordinate the vertical deformation of the fully prefabricated assembled floor slabs on both sides of the joint, avoiding the inconsistent deflection of the two floor slabs, resulting in cracking of the decoration and affecting the appearance of use. The tooth groove structure and fixed connecting parts greatly increase the in-plane shear and bending bearing capacity of the fully prefabricated floor slab and can ensure the coordination of out-of-plane deformation, which can achieve the use effect similar to that of cast-in-place integral floor slabs, and the structure is simple and the on-site construction is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of another embodiment of the present invention.

[0024] Figure 3 It is a structural schematic diagram of another embodiment of the present invention.

[0025] Figure 4 for Figure 1 A partial cross-sectional enlarged view of the tooth groove part.

[0026] Figure 5 for Figure 3 A partial enlarged cross-sectional view of the tooth groove part. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] The fully prefabricated assembled floor slab of the present invention is mainly used in steel structures or steel-concrete composite structures, such as Figures 1 to 3 As shown, the fully prefabricated assembled floor slab has steel beams 4 around its sides. The fully prefabricated assembled floor slab is formed by splicing two or more prefabricated floor slabs. The number of prefabricated floor slabs can be selected according to needs, generally 2-8. Among them, the joint between two adjacent prefabricated floor slabs is a tooth groove structure, and the two adjacent prefabricated floor slabs are meshed together through the tooth groove; wherein the shape of the tooth groove can be rectangular, such as Figure 1 and Figure 2 As shown; or dovetail-shaped (i.e., trapezoidal), such as Figure 3 As shown; a plurality of connecting fixings are arranged between two adjacent prefabricated floor slabs, and the number of connecting fixings is set according to the size of the tooth groove and the design requirements. When the tooth groove is large, multiple connecting fixings can be arranged in one tooth groove; when the tooth groove is small, one connecting fixing can be arranged in 2-4 tooth grooves.

[0029] Example 1

[0030] like Figure 1 and Figure 4 As shown, the fully prefabricated assembled floor slab in this embodiment is formed by splicing two prefabricated floor slabs 1, wherein the splicing portion of the two prefabricated floor slabs is a rectangular tooth groove structure, and the two prefabricated floor slabs are meshed with each other through the tooth grooves; three connecting fixings 2 are arranged between the two prefabricated floor slabs, and the connecting fixings are connected in the following manner:

[0031] A communication hole is provided at a corresponding position of each prefabricated floor slab fixing connector;

[0032] An open slot is provided at the position corresponding to the connecting hole at each prefabricated floor fixing connector, and the other end of the connecting hole is located in the open slot; Figure 1 As shown, the shape of the opening slot is trapezoidal.

[0033] A connecting piece 21 passes through the connecting hole to connect the two prefabricated floor slabs, and two round or square connecting plates 23 are fixed at both ends of the connecting bolts by nuts 22. A grouting joint is provided between the outer wall of the connecting piece and the inner wall of the connecting hole;

[0034] The two ends of the connecting piece are located in the opening grooves of the two prefabricated floor slabs;

[0035] High-strength grouting material 3 is poured into each open groove and connecting hole; it can also be ECC concrete or UHPC concrete material.

[0036] Example 2

[0037] like Figure 3 and Figure 5 As shown, the fully prefabricated assembled floor slab in this embodiment is formed by splicing three prefabricated floor slabs 1, wherein the splicing place of the three prefabricated floor slabs is a dovetail tooth groove structure, and two adjacent prefabricated floor slabs are meshed with each other through the dovetail tooth grooves; four connecting fixing members 2 are arranged between two adjacent prefabricated floor slabs, and the connecting fixing members are connected in the following manner:

[0038] A communication hole is provided at a corresponding position of each prefabricated floor slab fixing connector;

[0039] An open slot is arranged at a position corresponding to the connecting hole at each prefabricated floor fixing connector, and the other end of the connecting hole is located in the open slot; the open slot is rectangular.

[0040] A connecting bolt 21 passes through the connecting hole to connect the two prefabricated floor slabs; nuts 22 are screwed on both ends of the connecting bolt, and the nuts 22 fix two round or square connecting plates 23 on both ends of the connecting bolt.

[0041] The two ends of the connecting piece are located in the opening grooves of the two prefabricated floor slabs; wherein a grouting joint is provided between the outer wall of the connecting piece and the inner wall of the communicating hole;

[0042] Each open groove is filled with ECC concrete 3 connected thereto.

[0043] Example 3

[0044] The construction method of the floor slab of embodiment 1 or 2 is as follows:

[0045] 1) Connect each floor slab into the steel beam by tooth-groove engagement;

[0046] 2) Pass the connector through the connecting hole so that both ends of the connector are located in the two open slots. The connector can be a rigid connector or a flexible connector. The flexible connector should be able to resist tension (not compression) and be easily bent, similar to steel strands or hinges. When selecting a rigid connector, the open slot should be long enough.

[0047] 3) Secure the fixture with a nut in each open slot.

[0048] 4) Pour high-strength grouting material into one open groove until the high-strength grouting material passes through the grouting joint and fills the grouting material in both grooves.

Claims

1. A fully prefabricated assembled floor, characterized in that: The floor slab is formed by splicing two or more prefabricated floor slabs, wherein the splicing place of two adjacent prefabricated floor slabs is a tooth groove structure, and the two adjacent prefabricated floor slabs are meshed with each other through the tooth grooves; a plurality of connecting fixings are arranged between the two adjacent prefabricated floor slabs; The connecting fixture is connected in the following manner: A connecting hole is provided at a corresponding position of each prefabricated floor slab joint; An open groove is provided at the position corresponding to the connecting hole at each prefabricated floor slab joint, and the other end of the connecting hole is located in the open groove; A connecting piece passes through the connecting hole to connect the two prefabricated floor slabs; a grouting joint is provided between the outer wall of the connecting piece and the inner wall of the connecting hole; The two ends of the connecting piece are located in the opening grooves of the two prefabricated floor slabs; High-strength grouting material connected to the connector is poured into each open groove, which may also be ECC concrete or UHPC concrete material; The connecting piece is a connecting rod; The connecting rod is a connecting bolt, a nut is screwed on the connecting bolt, and two round or square connecting plates are fixed at both ends of the connecting bolt by the nut; there is a gap between the nut and the connecting plate and the inner wall of the opening groove respectively; The corresponding tooth groove arrangement of the connecting fixing member; The tooth groove structure is a dovetail tooth groove structure; The tooth groove is provided with a U-shaped steel bar for increasing the bearing capacity of the tooth groove.

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