Laminated slab post-pouring slab strip suspended formwork supporting structure

Abstract

The utility model provides a laminated slab post-pouring slab strip suspended formwork supporting structure which comprises a first prefabricated laminated slab and a second prefabricated laminated slab, and suspended formwork supporting steel bars and bamboo plywood are arranged between the first prefabricated laminated slab and the second prefabricated laminated slab. The two ends of the suspended formwork supporting steel bars are arranged above the end of the first prefabricated laminated slab and above the end of the second prefabricated laminated slab respectively, the two ends of the bamboo plywood are arranged below the end of the first prefabricated laminated slab and below the end of the second prefabricated laminated slab respectively, and reinforcing screws are arranged in the middles of the suspended formwork supporting steel bars. The reinforcing screws extend downwards to penetrate through the bamboo plywood, a concrete post-cast strip is arranged above the bamboo plywood, the two ends of the concrete post-cast strip are arranged above the end of the first prefabricated laminated slab and the end of the second prefabricated laminated slab respectively, and the formwork hanging supporting steel bars are embedded in the concrete post-cast strip. The structure reduces the situation that the post-cast strip is not firmly connected with the laminated slab, and is good in stability and high in forming quality.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering, and particularly relates to a suspension formwork support structure for a cast-in-place strip of a composite slab. Background Technique

[0002] The abbreviation of the precast concrete structure is a concrete structure mainly composed of precast components assembled or connected. The precast reinforced concrete structure is one of the important development directions of the building structure industry, which is conducive to the development of building industrialization, improves production efficiency, saves energy, develops green and environmental protection buildings, and is conducive to improving and ensuring the quality of building engineering.

[0003] In the precast concrete structure, the joint structure of the precast composite slab is divided into a separated joint and an integral joint. When a two-way composite slab is adopted, an integral joint is adopted on the side of the composite slab, and the joint adopts a post-cast strip form. According to engineering construction practice, it is found that the support frame usually adopted under the integral post-cast strip is connected to the lower parts of the two-side composite slabs, and there is a situation of inconsistent structural stiffness, which may cause the connection between the formwork and the composite slab to be uneven, resulting in slurry leakage and affecting the structural forming quality of the post-cast strip part. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a suspension formwork support structure for a cast-in-place strip of a composite slab, which reduces the unreliable connection between the post-cast strip and the composite slab, has good stability and high forming quality.

[0005] To achieve the above object, the suspension formwork support structure for a cast-in-place strip of a composite slab of the utility model includes a first precast composite slab and a second precast composite slab. The first precast composite slab and the second precast composite slab are symmetrically arranged with respect to the plumb line. A gap is left between the end of the first precast composite slab and the end of the second precast composite slab. A suspension formwork support steel bar and a bamboo plywood are arranged between the first precast composite slab and the second precast composite slab. The two ends of the suspension formwork support steel bar are respectively arranged above the end of the first precast composite slab and above the end of the second precast composite slab. The two ends of the bamboo plywood are respectively arranged below the end of the first precast composite slab and below the end of the second precast composite slab. A reinforcing screw rod is arranged in the middle of the suspension formwork support steel bar. The reinforcing screw rod extends downward through the bamboo plywood. A concrete post-cast strip is arranged above the bamboo plywood. The two ends of the concrete post-cast strip are respectively arranged above the end of the first precast composite slab and above the end of the second precast composite slab. The suspension formwork support steel bar is buried in the concrete post-cast strip.

[0006] Furthermore, the top end of the reinforcing screw rod is welded to the suspension formwork support steel bar. A rubber cone nut is arranged on the top surface of the bamboo plywood. The tip of the rubber cone nut faces upward. The rubber cone nut is sleeved on the reinforcing screw rod.

[0007] Further, a reinforcing steel pipe is provided below the bamboo plywood formwork. A number of wooden beams are provided between the reinforcing steel pipe and the bamboo plywood formwork. The reinforcing screw rod extends downward through the reinforcing steel pipe. A butterfly buckle is provided below the reinforcing steel pipe, and the butterfly buckle is sleeved on the reinforcing steel pipe.

[0008] Further, a first reserved steel bar is provided in the first precast composite slab. The first reserved steel bar penetrates the end of the first precast composite slab close to the second precast composite slab, and the first reserved steel bar is buried in the concrete post-cast strip. A second reserved steel bar is provided in the second precast composite slab. The second reserved steel bar penetrates the end of the second precast composite slab close to the first precast composite slab, and the second reserved steel bar is buried in the concrete post-cast strip.

[0009] Further, a first composite slab truss is provided above the first precast composite slab. The first composite slab truss is buried in the concrete post-cast strip, and the end of the first composite slab truss extends to cover the end of the formwork support steel bar for suspended formwork. A second composite slab truss is provided above the second precast composite slab. The end of the second composite slab truss extends to cover the end of the formwork support steel bar for suspended formwork.

[0010] Further, a first truss steel bar is provided above the first composite slab truss. The first truss steel bar is buried in the concrete post-cast strip, and the end of the first truss steel bar extends to cover the end of the formwork support steel bar for suspended formwork. A second truss steel bar is provided above the second composite slab truss. The second truss steel bar is buried in the concrete post-cast strip, and the end of the second truss steel bar extends to cover the end of the formwork support steel bar for suspended formwork.

[0011] Further, sponge strips are respectively provided between the end of the first precast composite slab and the concrete post-cast strip, and between the end of the second precast composite slab and the concrete post-cast strip.

[0012] Through the above technical solutions, the formwork support steel bars for suspended formwork provided on the upper parts of the precast composite slabs on both sides of the concrete post-cast strip serve as the upper support for the suspended formwork of the post-cast strip, and the bamboo plywood formwork provided below the concrete post-cast strip serves as the lower support for the suspended formwork of the post-cast strip. The upper and lower supports are connected into a whole through the reinforcing screw rod as the tension tie rod. The upper part of the reinforcing screw rod is connected into a whole with the upper support of the suspended formwork by welding. A reinforcement system is formed with the reinforcing steel pipe and the butterfly clip and the lower support of the suspended formwork. The overall stability of the suspended formwork system has been significantly improved. Without affecting the reinforcement, it is separated from the supports of the precast composite slabs on both sides, making the mechanical transmission of each more linear and clear. On this basis, sponge strips are provided at the joint between the concrete post-cast strip and the precast composite slab for reinforcement, ensuring the forming quality of the concrete pouring of the post-cast strip. At the same time, rubber cone nuts are provided at the lower part of the reinforcing screw rod to facilitate the removal of the later reinforcement system.

[0013] While realizing the stability of the formwork support for the post-cast strip of the composite slab, the formwork support structure for the post-cast strip of the composite slab of the present utility model can also effectively improve the problems of slurry leakage and offset during the concrete pouring process of the post-cast strip, and has a remarkable effect on improving the concrete forming quality of the post-cast strip structure of the composite slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described and elaborated below in conjunction with the drawings.

[0015] Figure 1 It is a cross-sectional view of the formwork support structure for the post-cast strip of the composite slab of the preferred embodiment of the present utility model.

[0016] Reference numerals: 1, the first precast composite slab; 11, the first reserved steel bar; 12, the first composite slab truss; 13, the first truss steel bar; 2, the second precast composite slab; 21, the second reserved steel bar; 22, the second composite slab truss; 23, the second truss steel bar; 3, the formwork support steel bar; 4, the bamboo plywood; 5, the reinforcement screw; 51, the rubber cone nut; 52, the butterfly buckle; 6, the concrete post-cast strip; 7, the wooden square; 8, the reinforcement steel pipe; 9, the sponge strip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solution of the present utility model will be more clearly and completely elaborated below in conjunction with the drawings and through the description of the preferred embodiments of the present utility model.

[0018] As Figure 1 shown, the formwork support structure for the post-cast strip of the composite slab of the preferred embodiment of the present utility model includes the first precast composite slab 1, the second precast composite slab 2 and the concrete post-cast strip 6. The first precast composite slab 1 and the second precast composite slab 2 are symmetrically arranged with the plumb line as the axis, and the two are mirror images of each other. A gap is left between the end of the first precast composite slab 1 and the end of the second precast composite slab 2. The ends of the first precast composite slab 1 and the second precast composite slab 2 are respectively buried in the concrete post-cast strip 6. Sponge strips 9 are respectively provided between the end of the first precast composite slab 1 and the concrete post-cast strip 6 and between the end of the second precast composite slab 2 and the concrete post-cast strip 6.

[0019] Above the first precast composite slab 1, there are a first composite slab truss 12 and a first truss steel bar 13. The ends of the first truss steel bar 13 and the first composite slab truss 12 are flush. The first precast composite slab 1 is provided with a first reserved steel bar 11 inside. The depth of the end of the first reserved steel bar 11 buried in the concrete post-cast strip 6 exceeds the depth of the end of the first precast composite slab 1 buried in the concrete post-cast strip 6. The depth of the end of the first precast composite slab 1 buried in the concrete post-cast strip 6 exceeds the depth of the ends of the first truss steel bar 13 and the first composite slab truss 12 buried in the concrete post-cast strip 6.

[0020] Similarly, a second laminated slab truss 22 and second truss steel bars 23 are provided above the second precast laminated slab 2. The ends of the second truss steel bars 23 and the second laminated slab truss 22 are flush. Second reserved steel bars 21 are provided in the second precast laminated slab 2. The depth at which the ends of the second reserved steel bars 21 are embedded in the concrete post-cast strip 6 exceeds the depth at which the ends of the second precast laminated slab 2 are embedded in the concrete post-cast strip 6. The depth at which the ends of the second precast laminated slab 2 are embedded in the concrete post-cast strip 6 exceeds the depth at which the ends of the second truss steel bars 23 and the second laminated slab truss 22 are embedded in the concrete post-cast strip 6.

[0021] In addition, rough surfaces are reserved on the surfaces of the first precast laminated slab 1 and the second precast laminated slab 2 to facilitate the adhesion of the concrete post-cast strip 6.

[0022] Hanging form support steel bars 3 and bamboo plywood 4 are provided between the first precast laminated slab 1 and the second precast laminated slab 2. The two ends of the hanging form support steel bars 3 are respectively arranged above the ends of the first precast laminated slab 1 and above the ends of the second precast laminated slab 2, and the two ends of the hanging form support steel bars 3 respectively extend into the ends of the first laminated slab truss 12 and the second laminated slab truss 22.

[0023] The two ends of the bamboo plywood 4 are respectively arranged below the ends of the first precast laminated slab 1 and below the ends of the second precast laminated slab 2, and the two ends of the bamboo plywood 4 can cover the ends of the first precast laminated slab 1 and the second precast laminated slab 2. The concrete post-cast strip 6 is poured above the bamboo plywood 4, filling the gap between the first precast laminated slab 1 and the second precast laminated slab 2 and forming a block structure above the hanging form support steel bars 3, and the hanging form support steel bars 3 are buried in the concrete post-cast strip 6.

[0024] A reinforcement screw rod 5 is provided in the middle of the hanging form support steel bars 3, and the reinforcement screw rod 5 extends downward through the bamboo plywood 4. The top end of the reinforcement screw rod 5 is welded to the hanging form support steel bars 3. A rubber cone nut 51 is provided on the top surface of the bamboo plywood 4, with the tip of the rubber cone nut 51 facing upward, and the rubber cone nut 51 is sleeved on the reinforcement screw rod 5. A reinforcement steel pipe 8 is provided below the bamboo plywood 4. A number of wooden squares 7 are provided between the reinforcement steel pipe 8 and the bamboo plywood 4. The reinforcement screw rod 5 extends downward through the reinforcement steel pipe 8. A butterfly buckle 52 is provided below the reinforcement steel pipe 8, and the butterfly buckle 52 is sleeved on the reinforcement steel pipe 8.

[0025] Specific implementation process:

[0026] 1. Structural composition and connection method: The first reserved steel bar 11, the first composite slab truss 12 and the first truss steel bar 13 are precast in the first precast composite slab 1, leaving the end and rough surface of the first reserved steel bar 11. The formwork support steel bar 3 is tied and connected to the reserved steel bar of the first composite slab. Similarly, the second reserved steel bar 21, the second composite slab truss 22 and the second truss steel bar 23 are precast in the second precast composite slab 2, leaving the end and rough surface of the second reserved steel bar 21. The formwork support steel bar 3 is tied and connected to the reserved steel bar of the second composite slab. At the same time, a concrete post-cast strip 6 is formed by concrete pouring, combining the first precast composite slab 1 and the second precast composite slab 2 into a whole.

[0027] 2. Formwork support method: The concrete post-cast strip 6 plays a lower support role through the first precast composite slab 1 and the second precast composite slab 2 assembled on both sides of the bamboo plywood formwork 4. The formwork support steel bar 3 supported on the upper parts of the first precast composite slab 1 and the second precast composite slab 2 on both sides serves as the upper support of the formwork. The upper and lower supports are connected by the reinforcement screw rod 5.

[0028] 3. Reinforcement method: The connection method with the upper support is on-site welding, and the connection method with the lower support is that the butterfly buckle 52 clamps the reinforcement steel pipe 8. The upper part of the reinforcement steel pipe 8 is reinforced with the upper part of the wooden square 7 used to support the formwork of the formwork support, making the whole reinforcement system form a whole.

[0029] The formwork support structure of the post-cast strip of the composite slab of the present utility model is separated from the lower support frame of the precast composite slab. As an independent reinforcement system, it is only connected inside the post-cast strip, avoiding the drawback that the connection between the uncast post-cast strip and the cast concrete support frame of the precast composite slab is not reliable. And through the reinforcing sponge strip, the leakage of mortar and the offset at the joint of the post-cast strip structure can be effectively improved, and the self-stability of the post-cast strip reinforcement system is improved. The overall stability of the post-cast strip construction is significantly improved, making the formed quality of the post-cast strip concrete structure better.

[0030] The above specific implementation manners only describe the preferred implementation manners of the present utility model, rather than limiting the protection scope of the present utility model. Without departing from the design concept and spirit scope of the present utility model, various deformations, substitutions and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model according to the text description and drawings provided by the present utility model shall all belong to the protection scope of the present utility model. The protection scope of the present utility model is determined by the claims.

Claims

1. A composite slab post-cast slab with hanging formwork support structure, characterized in that: The invention comprises a first prefabricated composite board (1) and a second prefabricated composite board (2), wherein the first prefabricated composite board (1) and the second prefabricated composite board (2) are symmetrically arranged with a plumb line as an axis, a gap is left between the end of the first prefabricated composite board (1) and the end of the second prefabricated composite board (2), a hanging formwork support steel bar (3) and a bamboo plywood (4) are arranged between the first prefabricated composite board (1) and the second prefabricated composite board (2), and the two ends of the hanging formwork support steel bar (3) are respectively arranged above the end of the first prefabricated composite board (1) and above the end of the second prefabricated composite board (2), and the The two ends of the bamboo plywood (4) are respectively arranged below the end of the first prefabricated composite board (1) and below the end of the second prefabricated composite board (2); a reinforcing screw (5) is provided in the middle of the hanging formwork supporting steel bar (3); the reinforcing screw (5) extends downward through the bamboo plywood (4); a concrete post-casting strip (6) is provided above the bamboo plywood (4); the two ends of the concrete post-casting strip (6) are respectively arranged above the end of the first prefabricated composite board (1) and above the end of the second prefabricated composite board (2); the hanging formwork supporting steel bar (3) is embedded in the concrete post-casting strip (6).

2. The composite slab post-cast slab with hanging formwork support structure according to claim 1, characterized in that: The top end of the reinforcing screw rod (5) is welded to the supporting steel bar (3) of the hanging formwork, and a rubber cone nut (51) is provided on the top surface of the bamboo plywood (4), the tip of the rubber cone nut (51) faces upward, and the rubber cone nut (51) is sleeved on the reinforcing screw rod (5).

3. The composite slab post-cast slab with hanging formwork support structure according to claim 2, characterized in that: A reinforcing steel pipe (8) is provided below the bamboo plywood (4), a plurality of wooden squares (7) are provided between the reinforcing steel pipe (8) and the bamboo plywood (4), the reinforcing screw rod (5) extends downward through the reinforcing steel pipe (8), a butterfly buckle (52) is provided below the reinforcing steel pipe (8), and the butterfly buckle (52) is sleeved on the reinforcing steel pipe (8).

4. The composite slab post-cast slab with hanging formwork support structure according to claim 3, characterized in that: The first prefabricated composite plate (1) is provided with a first reserved steel bar (11), the first reserved steel bar (11) penetrates the end of the first prefabricated composite plate (1) close to one end of the second prefabricated composite plate (2), and the first reserved steel bar (11) is embedded in the concrete post-cast strip (6); the second prefabricated composite plate (2) is provided with a second reserved steel bar (21), the second reserved steel bar (21) penetrates the end of the second prefabricated composite plate (2) close to one end of the first prefabricated composite plate (1), and the second reserved steel bar (21) is embedded in the concrete post-cast strip (6).

5. The composite slab post-cast slab with hanging formwork support structure according to claim 4, characterized in that: A first composite plate truss (12) is provided above the first prefabricated composite plate (1), the first composite plate truss (12) is embedded in a concrete post-casting strip (6), and the end of the first composite plate truss (12) extends to cover the end of a hanging formwork supporting steel bar (3); a second composite plate truss (22) is provided above the second prefabricated composite plate (2), and the end of the second composite plate truss (22) extends to cover the end of a hanging formwork supporting steel bar (3).

6. The composite slab post-cast slab with hanging formwork support structure according to claim 5, characterized in that: A first truss steel bar (13) is provided above the first composite plate truss (12), the first truss steel bar (13) is embedded in the concrete post-casting strip (6), and the end of the first truss steel bar (13) extends to cover the end of the formwork support steel bar (3); a second truss steel bar (23) is provided above the second composite plate truss (22), the second truss steel bar (23) is embedded in the concrete post-casting strip (6), and the end of the second truss steel bar (23) extends to cover the end of the formwork support steel bar (3).

7. The composite slab post-cast slab with hanging formwork support structure according to claim 1, characterized in that: Sponge strips (9) are respectively provided between the end of the first prefabricated composite board (1) and the concrete post-cast strip (6), and between the end of the second prefabricated composite board (2) and the concrete post-cast strip (6).

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