Reinforcing structure of prefabricated floor slab

Abstract

The utility model provides a reinforcing structure of a prefabricated floor slab, which is used for reinforcing the intersection position of the prefabricated floor slab and an original lintel, and relates to the technical field of building construction, the reinforcing structure of the prefabricated floor slab at least comprises two first connecting pieces, a second connecting piece and two concrete brackets, the two first connecting pieces are located on the two sides of the original lintel correspondingly and vertically penetrate to the position below the prefabricated floor slab correspondingly, the two ends of the second connecting piece transversely penetrate through the original lintel and extend out of the side wall of the original lintel, and the two concrete brackets are located on the two sides of the original lintel correspondingly. And the concrete bracket is integrally connected with the bottom surface of the prefabricated floor slab, the side wall surface of the original lintel, the first connecting piece and the second connecting piece. The reinforcing structure of the prefabricated floor slab can effectively improve the structural strength and the anti-seismic ductility of the prefabricated floor slab.

Description

Technical Field

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

[0002] After a construction project is completed for a period of time, in order to ensure the normal use of the existing structure and extend the service life of the structure, the project structure needs to be reinforced and renovated. Prefabricated panels are widely used in existing buildings. Due to the long construction time, many houses face the problem of reinforcement and maintenance; in addition, when an earthquake occurs, the prefabricated panels will have horizontal displacement, causing the prefabricated panels to detach, and then the wall will collapse, endangering the safety of life and property.

[0003] An existing reinforcement construction plan for prefabricated panels is to inject glue to fill the holes of the prefabricated panels within a range of 1000mm at the ends of the left and right prefabricated panels placed on the upper part of the load-bearing wall, install four full-length angle steels in reverse at the upper and lower inner corners where the wall panels meet, and then use through bolts to anchor the four angle steels in pairs. However, due to the lack of theoretical calculation basis, the angle steels are prone to instability and damage when subjected to force, and the connection method of the prefabricated panels located at the side spans is not solved. Grouting in the floor slab is likely to increase the load on the floor slab and reduce the safety margin of the floor slab; the large cavity in the middle of the prefabricated floor slab makes it difficult to ensure dense grouting and construction quality. The use of grouting glue to fill the prefabricated panels reduces the plastic deformation capacity of the corners of the prefabricated panels, limiting the full use of their deformation performance.

[0004] Another existing reinforcement construction scheme for prefabricated panels is that fixed plates are provided on both sides of the prefabricated panels, a plurality of first slots are provided on the top and bottom of the fixed plates, a fixed frame is provided on the top and bottom of the fixed plates, a plurality of first slides are provided on the top of the fixed frame, a first magnetic ring is fixedly connected in the first slide, a first iron rod is movably connected in the first magnetic ring, and the first iron rod passes through the fixed frame and is plugged into the first slot, and a plurality of second slots are provided on both sides of the fixed frame. This method proposes to set fixed plates on both sides of the prefabricated panels, which increases the safety of the prefabricated panels during construction, but cannot guarantee the integrity of the structure, and its seismic performance is poor. In addition, since this implementation method adopts magnetic blocks and iron rods for connection, the construction method and implementation process are immature, difficult to popularize, have high requirements for related components, and the quality of on-site construction is difficult to guarantee. The current more mature and theoretically based construction methods such as rebar embedding are not adopted.

[0005] In view of this, the inventor has designed a reinforcement structure for prefabricated floor slabs based on many years of production design experience in this field and related fields and after repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content

[0006] The utility model aims to provide a reinforcement structure of a prefabricated floor slab, which can effectively improve the structural strength and seismic ductility of the prefabricated floor slab.

[0007] To achieve the above-mentioned purpose, the utility model proposes a reinforcement structure of a prefabricated floor slab, which is used to reinforce the intersection of the prefabricated floor slab and the original lintel, wherein the reinforcement structure comprises at least two first connecting members, a second connecting member and two concrete corbels, the two first connecting members are respectively located on both sides of the original lintel and vertically penetrate to the bottom of the prefabricated floor slab, the two ends of the second connecting member transversely penetrate the original lintel and extend out of the side wall of the original lintel, the two concrete corbels are respectively located on both sides of the original lintel, and the concrete corbels are connected as a whole with the bottom surface of the prefabricated floor slab, the side wall surface of the original lintel, the first connecting member and the second connecting member.

[0008] In the reinforcement structure of the prefabricated floor slab as described above, the concrete corbel completely wraps the portion of the first connecting member protruding from the bottom surface of the prefabricated floor slab.

[0009] In the reinforcement structure of the prefabricated floor slab as described above, the first connecting member is a hollow steel pipe.

[0010] The reinforcement structure of the prefabricated floor slab as described above, wherein a wall is supported below the original lintel, the end of the second connecting member is bent downward and implanted into the wall, and the portion of the second connecting member protruding from the wall is completely wrapped in the concrete corbel.

[0011] In the reinforcement structure of the prefabricated floor slab as described above, the second connecting member is a steel bar.

[0012] In the reinforcement structure of the prefabricated floor slab as described above, a third connecting member is further provided in the concrete corbel, and the third connecting member is arranged along the length direction of the original lintel.

[0013] In the reinforcement structure of the prefabricated floor slab as described above, a plurality of the first connecting members and a plurality of the second connecting members are arranged along the length direction of the original lintel.

[0014] In the reinforcement structure of the prefabricated floor slab as described above, a plurality of the concrete corbels are arranged along the length direction of the original lintel, and each of the concrete corbels is aligned with the first connecting member.

[0015] In the reinforcement structure of the prefabricated floor slab as described above, one concrete corbel is provided on each side of the original lintel, and a plurality of the first connecting members are all wrapped in the concrete corbel on the same side.

[0016] The reinforcement structure of the prefabricated floor slab as described above, wherein the length of the concrete corbel is the same as the length of the original lintel.

[0017] Compared with the prior art, the utility model has the following characteristics and advantages:

[0018] The reinforcement device for the prefabricated floor slab proposed by the utility model can be widely used in reinforcement, maintenance and reconstruction projects of the floor slab as a prefabricated slab structure. Concrete corbels are added under the prefabricated floor slab, which on the one hand ensures the safety of the prefabricated floor slab, and on the other hand connects the prefabricated floor slab with the original lintel to increase its seismic ductility, thereby achieving better seismic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0020] Figure 1 This is a structural schematic diagram of the prefabricated floor reinforcement device proposed by the utility model;

[0021] Figure 2 It is a schematic diagram of the layout of the prefabricated floor reinforcement device in the utility model.

[0022] Description of Reference Numerals

[0023] 10. Strengthen the structure; 1. Original wall;

[0024] 2. Existing lintels; 3. Prefabricated floor slabs;

[0025] 4. First connecting piece; 5. Second connecting piece;

[0026] 6. Concrete corbel; 7. The third connecting piece. DETAILED DESCRIPTION

[0027] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0028] like Figure 1 , Figure 2As shown, the utility model proposes a reinforcement structure 10 of a prefabricated floor slab, which is used to reinforce the intersection of the prefabricated floor slab 3 and the original lintel 2. The reinforcement structure 10 includes at least two first connecting members 4, a second connecting member 5 and two concrete corbels 6. The two first connecting members 4 are respectively located on both sides of the original lintel 2 and respectively penetrate longitudinally to the bottom of the prefabricated floor slab 3. Both ends of the second connecting member 5 penetrate transversely through the original lintel 2 and extend out of the side wall of the original lintel 2. The two concrete corbels 6 are respectively located on both sides of the original lintel 2, and the concrete corbels 6 are connected to the bottom surface of the prefabricated floor slab 3, the side wall surface of the original lintel 2, the first connecting member 4 and the second connecting member 5 as a whole.

[0029] The reinforcement structure of the precast floor slab proposed by the utility model is that a concrete corbel 6 is added at the intersection of the precast floor slab 3 and the original lintel 2 to support the precast floor slab 3, the concrete corbel 6 is connected to the original component of the precast floor slab 3 through a first connecting piece 4, and the concrete corbel 6 is connected to the original lintel 2 through a second connecting piece 5, and then the precast floor slab 3 and the original lintel 2 are formed into a whole through the concrete corbel 6, thereby improving the seismic ductility and bearing capacity of the precast floor slab 3, thereby avoiding the problem of easy falling off of the precast floor slab during an earthquake to cause personal injury.

[0030] The utility model also relates to a reinforcement method for a prefabricated floor slab, which is used to reinforce the intersection of a prefabricated floor slab 3 and an existing lintel 2. The reinforcement method for the prefabricated floor slab comprises:

[0031] At least two first connecting members 4 are arranged on the prefabricated floor 3, so that the two first connecting members 4 are respectively located on both sides of the original lintel 2 and respectively penetrate longitudinally to the bottom of the prefabricated floor 3;

[0032] At least one second connecting member 5 is arranged on the original lintel 2, so that both ends of the second connecting member 5 transversely penetrate the original lintel 2 and extend out of the side wall of the original lintel 2;

[0033] A concrete corbel 6 is cast at the intersection of the bottom surface of the precast floor slab 3 and the side wall surface of the original lintel 2, so that the concrete corbel 6 is connected to the bottom surface of the precast floor slab 3, the side wall surface of the original lintel 2, the first connecting member 4 and the second connecting member 5 as a whole.

[0034] In an optional embodiment of the present invention, the size of the cross section of the concrete corbel 6 is calculated according to the actual stress conditions of the precast floor slab 3 and the original lintel 2. In this embodiment, the size of the cross section of the concrete corbel 6 is calculated according to the actual stress conditions of the precast floor slab 3 and the original lintel 2, which ensures that the concrete corbel 6 can meet the stress requirements and avoids the concrete corbel 6 being too heavy.

[0035] In an optional example of this embodiment, in order to ensure the stress condition of the concrete corbel 6, its cross-sectional height is generally not less than 350 mm, and the cross-sectional width is not less than 200 mm.

[0036] In an optional example of this embodiment, the size of the second connecting member 5 is calculated according to the cross-sectional area of ​​the concrete corbel 6, so as to further ensure that the reinforcement conditions in the concrete corbel 6 also conform to the actual stress conditions.

[0037] In an optional embodiment of the present invention, the wall 1 is supported below the original lintel 2, so that the end of the second connecting member 5 is bent downward and implanted into the wall 1, and the concrete corbel 6 completely wraps the portion of the second connecting member 5 protruding from the wall 1. In this embodiment, the original lintel 2, the original wall 1 and the concrete corbel are connected as a whole through the second connecting member 5, further improving the connection strength of the prefabricated floor slab 3 and the supporting structure below it.

[0038] In an optional example of this embodiment, the second connecting member 5 is implanted into the wall 1 to a depth of not less than 12d, wherein d is the diameter of the steel bars implanted into the wall.

[0039] In an optional example, the second connecting member 5 is a steel bar. Preferably, the second connecting member 5 is made of HRB400 grade steel bars, the diameter of which is not less than 8 mm, and in order to ensure the construction quality, the diameter of the steel bars is generally not greater than 16 mm.

[0040] During the construction process, the second connecting member 5 can be in the form of two or more sections, and the multiple sections are connected by on-site welding, and the single-sided welding length is not less than 5d.

[0041] In an optional embodiment of the present invention, the concrete corbel 6 completely wraps the portion of the first connecting member 4 protruding from the bottom surface of the prefabricated floor slab 3 to ensure that the concrete corbel 6 and the prefabricated floor slab 3 form an integral structure.

[0042] In an optional embodiment of the utility model, before pouring the concrete corbel 6, the bottom surface of the precast floor slab 3 and the side wall of the original lintel 2 are roughened and moistened respectively, so that the concrete corbel 6 formed after pouring can form a whole with the precast floor slab 3 and the original lintel 2.

[0043] In an optional embodiment of the present invention, the first connecting member 4 is a hollow steel pipe, and the concrete corbel 6 is cast using grouting material. The grouting material is injected through the first connecting member 4 as a casting hole to complete the casting of the concrete corbel 6.

[0044] In an optional embodiment of the present invention, a third connecting member 7 is further provided on the second connecting member 5 , and the third connecting member 7 is provided along the length direction of the original lintel 2 to further enhance the overall strength of the concrete corbel 6 .

[0045] In an optional embodiment of the utility model, a plurality of first connecting members 4 are arranged along the length direction of the original lintel 2, and a plurality of second connecting members 5 and concrete corbels 6 are arranged in position to further improve the connection strength between the original lintel 2 and the prefabricated floor slab 3.

[0046] In an optional example of this embodiment, a plurality of concrete corbels 6 are independently provided.

[0047] In another optional embodiment of the utility model, a plurality of first connecting members 4 are arranged along the length direction of the original lintel 2, and a plurality of second connecting members 5 are arranged in position, a concrete corbel is arranged on both sides of the original lintel 2 respectively, and the plurality of first connecting members 4 are all wrapped in the concrete corbel 6 on the same side thereof, so as to further improve the connection strength between the original lintel 2 and the prefabricated floor slab 3.

[0048] Furthermore, the length of the concrete corbel 6 is the same as the length of the original lintel 2 .

[0049] Furthermore, a steel bar is arranged inside the plurality of concrete corbels 6 along the length direction of the original lintel 2 to form a third connecting member 7 , thereby further enhancing the overall strength of the concrete corbels 6 .

[0050] In an optional example of this embodiment, the spacing between the plurality of first connecting members 4 can be determined comprehensively according to the grouting material process, and generally, one first connecting member 4 should be provided for each prefabricated floor slab 3 .

[0051] Further, the number of the first connecting members 4 on each side of the original lintel 2 is not less than 2. Preferably, the two first connecting members 4 are both hollow steel pipes, and one hollow steel pipe is used as a casting hole, and the other hollow steel pipe is used as a venting hole.

[0052] The reinforcement method and reinforcement structure 10 of the prefabricated floor proposed in the utility model can be widely used in the reinforcement, maintenance and reconstruction engineering of the floor as a prefabricated floor structure. Concrete corbels 6 are added under the prefabricated floor 3, which on the one hand ensure the safety of the prefabricated floor 3, and on the other hand connect the prefabricated floor 3 with the original lintel (ring beam) to increase its ductility, thereby achieving better earthquake resistance.

[0053] The reinforcement method and reinforcement structure 10 of the prefabricated floor slab provided by the utility model can carry out reinforcement work under the prefabricated floor slab while the upper floors are in normal use, without affecting the normal use of the building.

[0054] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.

Claims

1. A reinforcement structure for a prefabricated floor slab, used to reinforce the intersection of a prefabricated floor slab and an existing lintel, characterized in that: The reinforcement structure includes at least two first connecting members, a second connecting member and two concrete corbels. The two first connecting members are respectively located on both sides of the original lintel and vertically penetrate to the bottom of the prefabricated floor slab respectively. Both ends of the second connecting member transversely penetrate the original lintel and extend out of the side wall of the original lintel. The two concrete corbels are respectively located on both sides of the original lintel, and the concrete corbels are connected as a whole with the bottom surface of the prefabricated floor slab, the side wall surface of the original lintel, the first connecting member and the second connecting member.

2. The reinforcement structure of the prefabricated floor slab according to claim 1, characterized in that: The concrete corbel completely wraps the portion of the first connecting member protruding from the bottom surface of the prefabricated floor slab.

3. The reinforcement structure of the prefabricated floor slab according to claim 1, characterized in that: The first connecting member is a hollow steel pipe.

4. The reinforcement structure of the prefabricated floor slab according to claim 1, characterized in that: A wall is supported below the original lintel, and an end portion of the second connecting member is bent downward and implanted into the wall, and a portion of the second connecting member protruding from the wall is completely wrapped in the concrete corbel.

5. The reinforcement structure of the prefabricated floor slab according to claim 1, characterized in that: The second connecting member is a steel bar.

6. The reinforcement structure of the prefabricated floor slab according to claim 1, characterized in that: A third connecting piece is also provided in the concrete corbel, and the third connecting piece is arranged along the length direction of the original lintel.

7. The reinforcement structure of the prefabricated floor slab according to claim 1, characterized in that: A plurality of first connecting members and a plurality of second connecting members are arranged along the length direction of the original lintel.

8. The reinforcement structure of the prefabricated floor slab according to claim 7, characterized in that: A plurality of concrete corbels are arranged along the length direction of the original lintel, and each of the concrete corbels is aligned with the first connecting member.

9. The reinforcement structure of the prefabricated floor slab according to claim 7, characterized in that: A concrete corbel is provided on both sides of the original lintel, and a plurality of the first connecting members are wrapped in the concrete corbel on the same side.

10. The reinforcement structure of the prefabricated floor slab according to claim 9, characterized in that: The length of the concrete corbel is the same as the length of the original lintel.

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