Composite floor slab connecting structure

Abstract

The utility model discloses a composite floor slab connecting structure which comprises composite slabs, water stop rubber strips and cast-in-place sections, horizontal pressing grooves are formed in the two ends of the composite slabs, the water stop rubber strips are installed in the horizontal pressing grooves, the cast-in-place sections are poured to the elevation from the positions between the adjacent composite slabs, and concrete expansive agents are added to the cast-in-place sections. By the adoption of the composite floor slab connecting structure, firstly, two adjacent prefabricated composite slabs are connected through the cast-in-place sections; meanwhile, the water stop rubber strip is used for blocking a pouring cold seam between the laminated slab and the cast-in-place section so as to reduce the situations of water seepage and the like; in addition, by adding the concrete expansive agent, the compactness of the cast-in-place section structure can be improved, and the concrete expansive agent plays a positive role in overall integrity and leakage resistance. Therefore, compared with the existing laminated slab construction process, the laminated slab connecting structure provided by the utility model has obvious technical advantages.

Description

Technical Field

[0001] The utility model relates to the technical field of composite slab construction, in particular to a composite floor slab connection structure. Background Art

[0002] Composite floor slabs are composed of prefabricated composite slabs and cast-in-place reinforced concrete layers. Currently, the prefabricated integral floor slabs in the construction industry are divided into two parts: one is a prefabricated composite slab and the other is a cast-in-place concrete layer. The floor is assembled by the composite slabs and then poured with a layer of concrete. It is suitable for high-rise buildings and large-span buildings with high requirements for overall rigidity.

[0003] However, since the bottom layer of the composite floor is a prefabricated composite slab structure, it needs to be spliced ​​on site, and gaps appear during the splicing process. In order to solve the gaps in the splicing process, the existing technology is to cast concrete in it, but in the long-term use process, not only the cast-in-place section itself is prone to cracks, but also the joint surface between the cast-in-place section and the composite slab is prone to cracks, which becomes a common quality problem of the cast-in-place section of the composite slab. To this end, the utility model aims to provide a composite floor connection structure to solve the technical problems of excessive joints and leakage at the joints of the composite slabs, so as to ensure the safe and reliable use of the building. Summary of the invention

[0004] In order to overcome the technical problems described in the prior art, the purpose of the utility model is to provide a composite floor slab connection structure.

[0005] The utility model discloses a composite floor connection structure, comprising:

[0006] A composite plate, with horizontal pressing grooves arranged at both ends of the composite plate;

[0007] A water-stop rubber strip installed in the horizontal pressure groove;

[0008] A cast-in-place section, wherein the cast-in-place section is cast from between adjacent composite slabs to the elevation;

[0009] Wherein, the cast-in-place section is added with concrete expansion agent.

[0010] As a preferred technical solution, a first transverse steel bar and a first longitudinal steel bar which are perpendicular to each other are provided inside the composite plate.

[0011] As a preferred technical solution, the first transverse steel bar extends out from both ends of the composite plate to form an extension portion, and the end of the extension portion is folded upward to form a hook shape.

[0012] As a preferred technical solution, adjacent composite plates are arranged with a spacing of 250 mm to 300 mm.

[0013] As a preferred technical solution, both ends of the composite plate are inclined surfaces, and the inclined surfaces form an acute angle with the bottom surface of the composite plate.

[0014] As a preferred technical solution, the horizontal pressing grooves are arranged at 2 / 3 of the height at both ends of the composite plate.

[0015] As a preferred technical solution, a third transverse steel bar and a second longitudinal steel bar which are perpendicular to each other are provided inside the cast-in-place section.

[0016] As a preferred technical solution, the waterproof rubber strip is a water-absorbing and swelling waterproof rubber strip.

[0017] In summary, the utility model has the following technical effects:

[0018] The utility model provides a composite floor slab connection structure, which includes a composite board, a waterproof strip and a cast-in-place section, wherein horizontal grooves are provided at both ends of the composite board, the waterproof strip is installed in the horizontal grooves, the cast-in-place section is cast between adjacent composite boards, and a concrete expansion agent is added to the cast-in-place section. With the above composite floor slab connection structure, the connection between two adjacent prefabricated composite boards is first achieved through the cast-in-place section; at the same time, the waterproof strip is used to seal the casting cold joint between the composite board and the cast-in-place section to reduce the occurrence of water seepage and the like; in addition, the addition of the concrete expansion agent can improve the compactness of the cast-in-place section structure, and play a positive role in the overall integrity and anti-leakage. Therefore, compared with the existing composite board construction process, the composite floor slab connection structure provided by the utility model has obvious technical advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a partial front view schematic diagram of a composite floor slab connection structure provided by some embodiments;

[0021] Figure 2 is a partial side view schematic diagram of a composite floor slab connection structure provided by some embodiments;

[0022] The meanings of the reference numerals are as follows:

[0023] 1- Composite plate;

[0024] 2-Waterproof strip;

[0025] 3- cast-in-place section;

[0026] 4-first transverse reinforcement, 41-extension portion;

[0027] 5- first longitudinal reinforcement;

[0028] 6- second transverse reinforcement;

[0029] 7- Second longitudinal reinforcement. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. The embodiment described in this article is only for illustrative purposes, and is not intended to limit the scope of protection of the utility model. Therefore, it should be understood that various modifications and changes can be made to this embodiment without departing from the scope of protection of the utility model.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the term "and / or" includes any and all combinations of one or more associated listed items. Unless otherwise specified or explained, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Further, in the description of the present utility model, it should be understood that the directional words described in the present embodiment are described at the angles shown in the accompanying drawings and should not be understood as limiting the present embodiment. It should also be understood that in the context, when it is mentioned that an element or feature is connected to another element (one or more), it can not only be directly connected to the other (one or more) elements, but also indirectly connected to the other (one or more) elements through an intermediate element.

[0033] Before introducing the technical solution of the utility model, it is necessary to explain the creation background of the invention of the utility model. It is common that in the related technology, the composite floor slabs are spliced ​​on site and concrete is cast in the joints. However, during long-term use, not only are cracks in the cast-in-place sections themselves prone to cracks, but also cracks are easily generated at the interface between the cast-in-place sections and the composite slabs, which becomes a common quality problem of the cast-in-place sections of the composite slabs. To this end, the utility model aims to provide a composite floor slab connection structure to solve the technical problems of excessive joints and leakage at the joints of the composite slabs.

[0034] Based on the above problems, the exemplary embodiment of the present utility model is shown in FIG. Figure 1 and Figure 2, a composite floor connection structure is provided, including a composite board 1, a waterproof strip 2 and a cast-in-place section 3. Horizontal grooves are set at both ends of the composite board 1, the waterproof strip 2 is installed in the horizontal grooves, the cast-in-place section 3 is cast from between adjacent composite boards 1 to the elevation, and the cast-in-place section 3 is added with a concrete expansion agent. With the above-mentioned composite floor connection structure, the connection between two adjacent prefabricated composite boards 1 is first achieved through the cast-in-place section 3; at the same time, the waterproof strip 2 is used to seal the casting cold joint between the composite board 1 and the cast-in-place section 3 to reduce the occurrence of water seepage and the like; in addition, the addition of the concrete expansion agent can improve the compactness of the cast-in-place section 3 structure, which plays a positive role in the overall integrity and anti-leakage.

[0035] In some embodiments, see Figure 1 and Figure 2 , the first transverse reinforcement 4 and the first longitudinal reinforcement 5 are provided perpendicular to each other inside the composite plate 1. By adopting such a structure, i.e., pre-embedding the first transverse reinforcement 4 and the first longitudinal reinforcement 5 perpendicular to each other in the composite plate 1, the rigidity of the composite plate 1 is improved, thereby improving the crack resistance of the composite plate 1, and effectively preventing the occurrence of cracking and deformation by constraining the strain and deformation of the composite plate 1 when the composite plate 1 is subjected to force. Preferably, the first transverse reinforcement 4 extends out of the two ends of the composite plate 1 to form an extension 41, and the end of the extension 41 is folded upward to form a hook shape. By adopting such a structure, when casting the cast-in-place section 3, the hook-shaped reinforcement of the extension 41 between adjacent composite plates 1 plays the role of anchoring reinforcement to strengthen the connection strength between the composite plate 1 and the cast-in-place section 3. At the same time, it can also work in coordination with the concrete layer to improve the bending and shear strength of the composite floor slab, making the composite floor slab more solid as a whole. Further, considering the effect of steel bar anchoring, in some embodiments, adjacent composite plates 1 are arranged at intervals of 250mm to 300mm.

[0036] In some embodiments, see Figure 1 , both ends of the composite board 1 are inclined surfaces, and the inclined surfaces are at an acute angle to the bottom surface of the composite board 1. The use of such an inclined surface design increases the contact area between the composite board 1 and the cast-in-place section 3, so that the connection range between the composite board 1 and the cast-in-place section 3 is wider, so the connection between the composite board 1 and the cast-in-place section 3 is more firm and reliable, and the probability of an integrally connected gap between the interface of the composite board 1 and the cast-in-place section 3 is greatly reduced. After the cast-in-place section 3 solidifies, this inclined surface prevents the entire filled cast-in-place section 3 from moving vertically and horizontally, so even if it is subjected to strong vibration from external forces, the cast-in-place section 3 filled between two adjacent composite boards 1 will not be misaligned. In addition, this inclined surface design can effectively increase the water vapor leakage path, so that water vapor leakage is blocked, so as to improve the anti-leakage characteristics of the joint between the composite board 1 and the cast-in-place section 3.

[0037] In some embodiments, see Figure 1The horizontal pressing groove (not shown in the figure) is arranged at 2 / 3 of the height of the two ends of the composite board 1 to make the effect of the water-stop rubber strip 2 more complete, that is, a horizontal pressing groove is opened at 2 / 3 of the height of the two ends of the composite board 1, and the water-stop rubber strip 2 is embedded in the horizontal pressing groove after processing. Preferably, the water-stop rubber strip 2 can be wrapped with a plastic film to avoid damage to the water-stop rubber strip 2 during transportation and installation.

[0038] In some embodiments, see Figure 1 and Figure 2 , the cast-in-place section 3 is provided with a second transverse steel bar 6 and a second longitudinal steel bar 7 perpendicular to each other. That is, before casting the cast-in-place section 3, the second transverse steel bars 6 and the second longitudinal steel bars 7 perpendicular to each other are tied to the upper part of the composite plate 1 to form a steel bar truss, so as to improve the rigidity of the cast-in-place section 3, and to constrain the strain and deformation of the cast-in-place section 3 when the cast-in-place section 3 is subjected to force, so as to effectively prevent the occurrence of cracking and deformation of the cast-in-place section 3, and improve the overall stability of the cast-in-place section 3 structure.

[0039] As a preferred technical solution, the waterproof rubber strip 2 is a water-absorbing and swelling waterproof rubber strip 2, which has the special property of swelling when exposed to water and has the sealing and waterproofing effect of an elastic joint waterproof material.

[0040] By adopting the above-mentioned composite floor slab connection structure, a micro-expansion agent is added to the cast-in-place section 3 to increase the density of the concrete, improve its impermeability and crack resistance, and reduce the shrinkage rate of the concrete to avoid cracks caused by concrete shrinkage, thereby reducing the problem of excessive gaps between the composite board 1 and the cast-in-place section 3. Secondly, pre-embedded waterproof strips 2 at the joints between the composite board 1 and the cast-in-place board can effectively fill the gaps between the boards to ensure the building's anti-leakage performance, and the material and performance of the waterproof strips 2 can also be selected according to specific needs to achieve the best leakage effect. Therefore, compared with the existing composite board 1 construction technology, the composite floor slab connection structure provided by the utility model has obvious technical advantages.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A composite floor connection structure, characterized in that: include: A composite plate, with horizontal pressing grooves arranged at both ends of the composite plate; A water-stop rubber strip installed in the horizontal pressure groove; A cast-in-place section, wherein the cast-in-place section is cast from between adjacent composite slabs to the elevation; Wherein, the cast-in-place section is added with concrete expansion agent.

2. The composite floor connection structure according to claim 1, characterized in that: The composite plate is provided with a first transverse steel bar and a first longitudinal steel bar which are perpendicular to each other.

3. The composite floor connection structure according to claim 2, characterized in that: The first transverse reinforcement extends out from both ends of the composite plate to form an extension portion, and the ends of the extension portion are folded upward to form a hook shape.

4. The composite floor connection structure according to claim 1, characterized in that: The adjacent composite plates are arranged at intervals of 250 mm to 300 mm.

5. The composite floor connection structure according to claim 1, characterized in that: Both ends of the stacking plate are inclined surfaces, and the inclined surfaces form an acute angle with the bottom surface of the stacking plate.

6. The composite floor connection structure according to claim 1, characterized in that: The horizontal pressing grooves are arranged at 2 / 3 of the height of both ends of the composite plate.

7. The composite floor connection structure according to claim 1, characterized in that: The cast-in-place section is provided with second transverse reinforcements and second longitudinal reinforcements which are perpendicular to each other.

8. The composite floor connection structure according to claim 1, characterized in that: The waterproof adhesive strip is a water-absorbing and swelling type waterproof adhesive strip.

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