Building post-cast strip independent supporting structure and construction method thereof

Abstract

The invention discloses a building post-cast strip independent supporting structure and a construction method thereof. The building post-cast strip independent supporting structure comprises a constructional column. The multiple constructional columns are distributed on the two sides of the post-cast strip. The lower ends of the constructional columns are supported on a bottom plate, and the upper ends of the constructional columns are anchored to the beam bottom, close to one end of the post-cast strip, of the frame beam perpendicularly intersected with the post-cast strip. A post-cast strip supporting system is changed into a concrete constructional column independent supporting system from a traditional frame body formwork supporting system, the renting cost of the pipe buckle frame can be reduced, the steel consumption is reduced, meanwhile, the post-cast strip and a top plate can be subjected to formwork removal at the same time, the construction efficiency is improved, the constructional columns are used for independently supporting the frame beams, the indoor space can be widened, and the construction cost is reduced. And material transfer and effective proceeding of subsequent construction are facilitated.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, and more specifically to an independent support structure for post-cast strips in buildings and its construction method. Background Technology

[0002] In the field of modern construction engineering, with the continuous expansion of building scale and the increasing complexity of structural forms, post-cast strips, as a key technical means to control concrete shrinkage deformation and adjust structural settlement differences, are widely used in the construction of high-rise, super high-rise buildings and large-span structures. Post-cast strips are temporary construction joints reserved during the construction process to prevent harmful cracks from being generated in cast-in-place reinforced concrete structures due to their own shrinkage, temperature changes or uneven settlement of the foundation. After the main structure is completed and the concrete shrinkage is basically stable, high-grade concrete is used to seal and pour the joint.

[0003] According to relevant specifications, the formwork and supports at the post-cast strip must be set up independently and must not be connected to the main structure's formwork support system. Furthermore, the post-cast strip supports must not be removed when the main structure's formwork is dismantled, as the post-cast strip transforms the complete beam and slab structure into a "cantilever component." If the post-cast strip supports are connected to the surrounding system, when the formwork on both sides is removed, the "cantilever" structure at the post-cast strip will sag, crack, or even be destroyed under its own weight and construction loads.

[0004] Existing technologies typically involve erecting double rows of independent supports on both sides of the post-cast strip, completely separating it from the full-span scaffolding, or using steel profiles to create temporary independent supports. These independent supports can only be removed after the post-cast strip concrete has cured for 28 days and reached the required strength. This increases material rental costs, occupies indoor space, and is inconvenient for the transportation of subsequent construction materials and the coordination of construction procedures.

[0005] Therefore, how to provide a low-cost, high-efficiency independent support structure for post-cast strips and its construction method is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides an independent support structure for post-cast strips of buildings and its construction method, which solves the problems of long construction period, large steel consumption, high rental cost, large amount of installation and dismantling work, and low construction efficiency caused by the impact on indoor space of existing independent support frames for post-cast strips.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An independent support structure for post-cast strips in buildings, including structural columns; The structural columns are multiple and distributed on both sides of the post-cast strip; the lower end of the structural columns is supported on the base plate, and the upper end is anchored to the bottom of the frame beam that intersects the post-cast strip perpendicularly.

[0009] The beneficial effects of the technical solution of this invention are that by replacing the traditional post-pouring strip frame formwork support system with structural columns, and using structural columns for independent support, the drawbacks of the workload of frame installation and dismantling are avoided, and no rental costs are incurred. By setting up structural columns, the post-pouring strip and the top slab can be demolded at the same time, which improves construction efficiency and opens up the indoor space, which facilitates the subsequent construction and material transportation, thus greatly improving construction efficiency.

[0010] Preferably, the structural column is a circular column, and the distance between the center of the circular column and the side end face of the corresponding frame beam near the post-cast strip is 300-500mm. Due to the presence of the post-cast strip, the frame beam or slab forms a cantilever structure, and structural columns can be set at the edge of the cantilever structure to avoid problems such as sinking, cracking, and deformation of the cantilever structure under its own weight.

[0011] Preferably, the structural column contains an internal reinforcing cage, the upper end of which is welded or tied to the reinforcing bars in the frame beam. By installing the reinforcing cage, the compressive strength of the structural column can be improved, ensuring effective support for the frame beam.

[0012] Preferably, the outer diameter of the structural column is not less than 300 mm.

[0013] Preferably, the structural column includes a plastic sleeve and column concrete poured inside the plastic sleeve. By using the plastic sleeve as a pouring template for the structural column, the construction cost of the structural column can be reduced.

[0014] Preferably, the plastic sleeve consists of two identical tubes that interlock and enclose a casting cavity; each tube has outwardly extending flanges at its edge; each flange has multiple bolt holes; the flanges on the two tubes abut against each other, and fastening bolts pass through the bolt holes to secure the two tubes together. The plastic sleeve is connected by bolts between the two tubes, facilitating installation and removal, and allowing for easy relocation of the plastic sleeve after the structural column is cast.

[0015] Preferably, the compressive strength of the column concrete is not less than 30 MPa.

[0016] This invention also provides a construction method for an independent support structure for post-cast strips in buildings, comprising the following steps: S1. Measurement and Positioning: Measure and lay out the lines on the base plate to determine the location of the structural columns; S2. Formwork erection: The formwork for the structural columns and the supports for the frame beams are erected simultaneously, and the formwork for the frame columns is installed. S3. Concrete pouring: Concrete is poured for both structural columns and frame columns at the same time. The frame beams are poured after the concrete strength reaches 1.2 MPa. S4. Top slab construction: Erect scaffolding, with the scaffolding area covering the post-pouring strip; install the top slab formwork and pour the top slab concrete; S5. Construction of post-pouring strip: Pour the post-pouring strip concrete. After the post-pouring strip concrete reaches the design strength, remove the support and simultaneously remove the bottom formwork of the top slab and the post-pouring strip. S6. Manually remove structural columns.

[0017] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an independent support structure for post-pouring strips and its construction method. The post-pouring strip support system is changed from the traditional scaffold formwork support system to an independent support system of concrete structural columns, which can reduce the rental cost of pipe clamps and reduce the amount of steel used. At the same time, it can allow the post-pouring strip and the top slab to be demolded at the same time, improving construction efficiency. Furthermore, the use of structural columns to independently support the frame beams can open up the indoor space, facilitate material transportation, and facilitate the effective implementation of subsequent construction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A cross-sectional view of the independent support structure provided by the present invention; Figure 2 This is a schematic diagram of the structural column arrangement provided by the present invention; Figure 3 The front view of the plastic sleeve provided by the present invention.

[0020] Among them, 1-post-cast strip; 2-structural column; 21-reinforcing cage; 22-plastic sleeve; 23-wing plate; 24-bolt hole; 3-frame beam; 4-frame column; 5-base plate; 6-support. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Participate in the attached Figure 1 To be continued Figure 3This invention discloses an independent support structure for post-cast strips in buildings, which uses concrete columns to replace the traditional scaffolding formwork system, reducing production costs and improving construction efficiency. The structure includes structural columns 2; there are multiple structural columns 2 distributed on both sides of the post-cast strip 1; the lower end of the structural columns 2 is supported on the base plate 5, and the upper end is anchored to the bottom of the frame beam 3 that intersects the post-cast strip 1 perpendicularly.

[0023] In this embodiment, the structural column 2 is a circular column, and the distance between the center of the circular column and the side end face of the corresponding frame beam 3 near the post-cast strip 1 is 300~500mm.

[0024] To further optimize the above technical solution, the outer diameter of the structural column 2 is not less than 300mm. The structural column 2 has an internally anchored steel reinforcement cage 21, and the upper end of the steel reinforcement cage 21 is welded or tied to the steel reinforcement in the frame beam 3.

[0025] The steel cage has four longitudinal bars, which are connected by stirrups arranged at intervals above and below to form the steel cage.

[0026] To further optimize the above technical solution, the structural column 2 includes a plastic sleeve 22 and column concrete poured inside the plastic sleeve 22. To facilitate demolding, the inner wall of the plastic sleeve 22 is coated with a release agent.

[0027] In other specific embodiments, to facilitate the installation and transportation of the plastic sleeve, the plastic sleeve 22 is formed by two tubes of the same size interlocking and enclosing each other to form a casting cavity; the edges of the tubes extend outward with wing plates 23; multiple bolt holes 24 are provided on the wing plates 23; the wing plates 23 on the two tubes abut against each other, and fastening bolts pass through the bolt holes 24 to fasten the two tubes.

[0028] To further optimize the above technical solution, the compressive strength of the column concrete should not be less than 30 MPa.

[0029] This embodiment also provides a construction method for an independent support structure for post-cast strips in buildings, including the following steps: S1. Measurement and positioning: Measure and lay out the lines on the base plate 5 to determine the position of the structural column 2. Position the structural column 2 300-500mm from the cantilever end of the frame beam 3. S2. Formwork erection: The formwork for structural column 2 and the support for frame beam 3 are erected simultaneously, and the formwork for frame column 4 is installed. S3. Concrete pouring: Concrete is poured for structural column 2 and frame column 4 at the same time. After the concrete strength reaches 1.2 MPa, the laitance, garbage and other debris on the top of structural column 2 are removed, and then frame beam 3 is poured. S4. Top slab construction: Erect scaffolding 6, the erection range of scaffolding 6 covering the post-pouring strip 1; install the top slab formwork and pour the top slab concrete; S5. Construction of post-pouring strip: Pour the post-pouring strip concrete. After the post-pouring strip concrete reaches the design strength, remove the support 6 and at the same time remove the bottom formwork of the top slab and post-pouring strip 1. S6. Structural column 2 shall be removed manually. The structural column 2 shall not be pushed down as a whole to avoid damaging the base plate 5.

[0030] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An independent support structure for post-cast strips in buildings, characterized in that, Including structural columns (2); The number of structural columns (2) is multiple and they are distributed on both sides of the post-cast strip (1); the lower end of the structural column (2) is supported on the base plate (5), and the upper end is anchored to the bottom of the frame beam (3) that intersects the post-cast strip (1) at one end of the post-cast strip (1).

2. The independent support structure for post-cast strips in buildings according to claim 1, characterized in that, The structural column (2) is a circular column, and the distance between the center of the circular column and the side end face of the corresponding frame beam (3) near the post-cast strip (1) is 300 ~ 500 mm.

3. The independent support structure for post-cast strips in buildings according to claim 2, characterized in that, The structural column (2) is anchored with an inherent steel reinforcement cage (21), and the upper end of the steel reinforcement cage (21) is welded or tied to the steel reinforcement in the frame beam (3).

4. The independent support structure for post-cast strips in buildings according to claim 2, characterized in that, The outer diameter of the structural column (2) is not less than 300 mm.

5. The independent support structure for post-cast strips in buildings according to claim 1, characterized in that, The structural column (2) includes a plastic sleeve (22) and column concrete poured inside the plastic sleeve (22).

6. The independent support structure for post-cast strips in buildings according to claim 5, characterized in that, The plastic sleeve (22) consists of two tubes of the same size that are interlocked and enclosed to form a casting cavity; the edges of the tubes extend outward with wing plates (23); multiple bolt holes (24) are provided on the wing plates (23); the wing plates (23) on the two tubes abut against each other, and fastening bolts pass through the bolt holes (24) to fasten the two tubes.

7. The independent support structure for post-cast strips in buildings according to claim 6, characterized in that, The compressive strength of the column concrete is not less than 30 MPa.

8. A construction method for an independently supported structure with post-cast strips in a building according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Measurement and positioning: Measure and lay out the lines on the base plate (5) to determine the position of the structural column (2); S2, Formwork erection: The formwork of the structural column (2) and the support of the frame beam (3) are erected at the same time, and the formwork of the frame column (4) is installed. S3. Concrete pouring: Concrete is poured for the structural column (2) and frame column (4) at the same time. After the concrete strength reaches 1.2 MPa, the frame beam (3) is poured. S4. Top slab construction: Erect scaffolding (6), the erection range of scaffolding (6) covers the post-pouring strip (1); install the top slab formwork and pour the top slab concrete; S5. Construction of post-pouring strip: Pour the post-pouring strip concrete. After the post-pouring strip concrete reaches the design strength, remove the support (6) and at the same time remove the bottom formwork of the top plate and the post-pouring strip (1). S6. Manually remove the structural column (2).

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