Assembled integral type hollow floor system based on prestressed hollow slabs

Abstract

The prefabricated prestressed hollow slabs are mutually spliced to form the floor system, the prefabricated prestressed hollow slabs are provided with transverse penetrating reinforcing steel bars, and the adjacent prefabricated prestressed hollow slabs are horizontally connected through the transverse penetrating reinforcing steel bars. Abutted seam connecting pieces are arranged at the butt joint ends of the prefabricated prestressed hollow slabs, and after the abutted seam connecting pieces are in butt joint in abutted seams formed by the prefabricated prestressed hollow slabs, concrete is cast in place to connect the prestressed hollow slabs into a whole; prefabricated prestressed hollow slabs are adopted as the floor system, the flat hollow floor system with the large span can be formed, the sound insulation and heat insulation performance of a building can be improved, flexible arrangement of internal partition walls is achieved, and the prefabricated prestressed hollow slab floor system has the advantages of being simple in structure, rapid to construct, low in cost, safe and reliable; and environmental protection and reduction of carbon emission are facilitated.

Description

Technical Field

[0001] The invention relates to a concrete hollow floor slab, in particular to an assembled integral hollow floor slab based on a prestressed hollow slab. Background Art

[0002] In the large number of residential, apartment, hotel and office buildings, as the requirements for acoustic and thermal performance become increasingly stringent, the task of improving the quality of floor structure design has been placed before structural design engineers. At the same time, the functional transformation of various buildings has put forward the demand for flexible division of building space. The requirement of transforming small-sized residential buildings into larger ones has gradually become prominent in urban renewal practice. For this reason, the floor structure needs to have the ability to flexibly install various types of walls. For the above requirements, ordinary beam-slab floor is difficult to adapt to, and it has the following problems: increasing the thickness of the floor to solve the problems of sound insulation and heat insulation will greatly increase the amount of concrete used and increase the deadweight of the structure, which will not only increase the cost, but also reduce the seismic performance of the structure; changing the position of the wall arrangement will expose the floor beams originally in the wall position, seriously damaging the aesthetic value of the building space and making the decoration project difficult.

[0003] Therefore, a floor structure that can span a large span and has a flat bottom surface is needed. After overcoming the shortcomings of the cast-in-place beam-slab system, such as rigid layout and difficulty in adapting to the flexible arrangement of partition walls, it can achieve the construction of large-span flat floor with simple structure, fast construction, low cost, safety and reliability. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an assembled integral hollow floor based on prestressed hollow slabs, which has a large span and a flat bottom surface of the floor, and completely avoids the use of vertical supports and consumable formwork within the span of the floor, which is beneficial to environmental protection and reducing carbon emissions, and has the characteristics of simple structure, quick construction, low cost, safety and reliability.

[0005] The assembled integral hollow floor slab based on the prestressed hollow slab of the present invention comprises prefabricated prestressed hollow slabs spliced ​​together to form the floor slab, the prefabricated prestressed hollow slabs are provided with transverse penetrating steel bars, adjacent prefabricated prestressed hollow slabs are horizontally connected by the transverse penetrating steel bars, the butt ends of the prefabricated prestressed hollow slabs are provided with joint connectors, the joint connectors are butt-jointed in the joints formed by the prefabricated prestressed hollow slabs, and then cast-in-place concrete is used to connect the prestressed hollow slabs into a whole;

[0006] Further, the joint connector is an L-shaped structure in cross section and is arranged at the bottom of the butt joint end of the prefabricated prestressed hollow slab, the vertical side of the L-shaped structure is located inside the prefabricated prestressed hollow slab, and the horizontal side extends to the joint joint;

[0007] Furthermore, the horizontal edge of the joint connector is arranged flush with the bottom edge of the prestressed hollow slab;

[0008] Furthermore, the transverse through-steel bars are respectively arranged at the lower edge and the upper edge of the prefabricated prestressed hollow slab;

[0009] Further, when a laminated layer is provided on the prefabricated prestressed hollow slab, the transverse through-steel bar is provided at the lower edge of the prefabricated prestressed hollow slab and butted to the upper part of the joint connector;

[0010] Furthermore, the corners of the seam connector are rounded;

[0011] Further, the joint connector is made of cement material;

[0012] Furthermore, the prefabricated prestressed hollow slab is provided with longitudinal prestressed steel bars at the lower part and longitudinal steel bars or prestressed steel bars at the upper part.

[0013] The beneficial effects of the present invention are as follows: the assembled integral hollow floor based on prestressed hollow slabs of the present invention adopts prefabricated prestressed hollow slabs as floor slabs, can form a flat hollow floor slab with a larger span, improve the sound insulation and heat insulation performance of the building, and realize the flexible arrangement of the internal partition walls. It has the characteristics of simple structure, fast construction, low cost, safety and reliability, and there is no need to use vertical supports and consumable formwork within the span of the floor slab, which is beneficial to environmental protection and reducing carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is the cross-section and side elevation of the prefabricated prestressed hollow slab, where a is the edge slab (without overlapping layer), b is the standard slab (without overlapping layer), and c is the side elevation of the hollow slab;

[0016] Figure 2 This is the floor plan structure layout diagram;

[0017] Figure 3 It is an integral connection structure of prestressed hollow slabs without overlapping layers;

[0018] Figure 4 It is an integral connection structure of prestressed hollow slabs under the superimposed layer. DETAILED DESCRIPTION

[0019] The assembled integral hollow floor based on the prestressed hollow slab of the present embodiment comprises prefabricated prestressed hollow slabs 1 spliced ​​together to form the floor, the prefabricated prestressed hollow slabs 1 are provided with transversely penetrating steel bars 3, adjacent prefabricated prestressed hollow slabs 1 are horizontally connected by the transversely penetrating steel bars 3, the butt ends of the prefabricated prestressed hollow slabs 1 are provided with joint connectors 2, the joint connectors 2 are butt-jointed in the joints formed by the prefabricated prestressed hollow slabs 1, and then cast-in-place concrete is used to connect the prestressed hollow slabs into a whole; a plurality of prefabricated prestressed hollow slabs 1 are horizontally spliced ​​to form the floor, The precast prestressed hollow slab 1 is provided with transversely penetrating steel bars extending out of the slab. The penetrating steel bars extending out of the slab are used to connect adjacent precast prestressed hollow slabs 1. Each precast prestressed hollow slab 1 is also provided with a joint connector 2. The joint connector 2 is used to butt two adjacent precast prestressed hollow slabs 1 in the joint 6. Then, cast-in-place concrete is poured to form the precast prestressed hollow slab 1 into a whole. At the same time, the joint connector 2 serves as the bottom formwork of the cast-in-place concrete and remains in the joint after casting and forming, and is permanently retained in the main structure concrete as a steel bar protective layer. The precast prestressed hollow slab 1 is divided into a side plate 101 and a standard plate 102. Since only one side of the side plate 101 is a butt end, only one end needs to be provided with a joint connector 2, such as Figure 1 (a), and since both sides of the standard plate 102 need to be butted against the adjacent prefabricated prestressed hollow plate 1, it is necessary to provide joint connectors 2 on both sides. Figure 1 (b).

[0020] In this embodiment, the joint connector 2 is an L-shaped structure in cross section and is arranged at the bottom of the butt joint end of the prefabricated prestressed hollow slab 1. The vertical edge of the L-shaped structure is located inside the prefabricated prestressed hollow slab 1, and the horizontal edge extends to the joint 6 for butt joint; the joint connector 2 forms an angular frame on the prefabricated prestressed hollow slab 1, and its horizontal edge extends into the joint to butt joint with the horizontal edge of the joint connector 2 of another prefabricated prestressed hollow slab 1.

[0021] In this embodiment, the horizontal edge of the joint connector 2 is arranged flush with the bottom edge of the prestressed hollow slab, which can ensure the flatness of the hollow floor.

[0022] In this embodiment, the transverse through-steel bars 3 are respectively arranged at the lower edge or upper edge of the precast prestressed hollow slab 1; when the integral superposition layer is not arranged, the transverse through-steel bars are arranged at both the lower edge and the upper edge of the precast prestressed hollow slab 1, and the steel bars extend outward. When the precast prestressed hollow slab 1 is installed, the horizontal side seams of the L-shaped structure are combined, and the transverse steel bars extending from the prestressed hollow slab on both sides intersect with each other, and then concrete is poured in the range of the seam connector 2 to form an integral connection seam. The integral connection seam is formed by anchoring the transverse outwardly extending steel bars of the precast prestressed hollow slab 1 to form an integral connection seam. Figure 3 shown.

[0023] In this embodiment, when an overlapping layer 7 is provided on the precast prestressed hollow slab 1, the transverse through-steel bars 3 are provided at the lower edge of the precast prestressed hollow slab 1 and connected to the upper portion of the joint connector 2; the overlapping layer is an optional option. When an overlapping layer is provided, no through-steel bars are provided at the upper edge of the hollow slab precast component. In this case, the through-steel bars in the upper portion are provided by the steel bars in the overlapping layer. When an overlapping layer 7 is provided on the precast prestressed hollow slab 1, the concrete of the overlapping layer is cast together with the concrete within the joint connector 2 to form an integral connection seam. The integral connection seam connects the precast prestressed hollow slab 1 as a whole by anchoring the transversely protruding steel bars of the hollow slab. Figure 4 shown.

[0024] In any of the above cases, the joint connector 2 serves as the bottom formwork of the cast-in-place concrete and is permanently retained in the main structure concrete as a steel bar protective layer, realizing zero support and zero formwork technology, and according to actual conditions, a hidden beam can be set within the joint width range where the joint connector 2 is located.

[0025] In this embodiment, the corners of the joint connector 2 are rounded to ensure that the wet joint concrete slurry penetrates the thickness range of the connector.

[0026] In this embodiment, the joint connector 2 is made of cement material; the product is made of high-performance cement material (including suitable fiber material), and its strength and durability are much higher than hollow slab concrete.

[0027] In this embodiment, the prefabricated prestressed hollow slab 1 is provided with longitudinal prestressed steel bars 4 at the bottom and longitudinal steel bars or prestressed steel bars at the top. The prestressed hollow slab is provided with longitudinal prestressed steel bars at the bottom to provide the floor slab with the ability to resist positive bending moment, and the upper part is provided with longitudinal steel bars or / and prestressed steel bars 5 to provide the hollow slab in the prefabrication stage with the tensile stress caused by the prestress, and to provide the floor slab with the ability to resist negative bending moment after the overall structure is formed.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An assembled integral hollow floor based on prestressed hollow slab, characterized in that: It comprises prefabricated prestressed hollow slabs which are spliced ​​together to form a floor slab, wherein the prefabricated prestressed hollow slabs are provided with transverse penetrating steel bars, and adjacent prefabricated prestressed hollow slabs are horizontally connected by the transverse penetrating steel bars, and the butt ends of the prefabricated prestressed hollow slabs are provided with joint connectors, and the joint connectors are butt-jointed in the joints formed by the prefabricated prestressed hollow slabs, and then cast-in-situ concrete is used to connect the prestressed hollow slabs into a whole.

2. The assembled integral hollow floor based on prestressed hollow slab according to claim 1 is characterized in that: The joint connector is an L-shaped structure in cross section and is arranged at the bottom of the butt joint end of the prefabricated prestressed hollow slab. The vertical side of the L-shaped structure is located in the prefabricated prestressed hollow slab, and the horizontal side extends to the joint.

3. The assembled integral hollow floor based on prestressed hollow slab according to claim 2 is characterized in that: The horizontal edge of the joint connector is arranged flush with the bottom edge of the prestressed hollow slab.

4. The assembled integral hollow floor based on prestressed hollow slab according to claim 3 is characterized in that: The transverse penetrating steel bars are respectively arranged at the lower edge and the upper edge of the prefabricated prestressed hollow slab.

5. The assembled integral hollow floor based on prestressed hollow slab according to claim 3 is characterized in that: When the prefabricated prestressed hollow slab is provided with a superimposed layer, the transverse penetrating steel bars are provided at the lower edge of the prefabricated prestressed hollow slab and butted against the upper portion of the joint connector.

6. The assembled integral hollow floor based on prestressed hollow slab according to claim 4 or 5, characterized in that: The corners of the seam connector are rounded.

7. The assembled integral hollow floor based on prestressed hollow slab according to claim 6 is characterized in that: The joint connector is made of cement material.

8. The assembled integral hollow floor based on prestressed hollow slab according to any one of claims 1 to 5, characterized in that: The lower part of the prefabricated prestressed hollow slab is provided with longitudinal prestressed steel bars, and the upper part is provided with longitudinal steel bars or prestressed steel bars.

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