Construction method of post-cast strip independent supporting system

Abstract

The invention discloses a construction method of a post-cast strip independent supporting system, which comprises the following steps of: firstly, erecting a character-shaped disc buckle supporting rigid frame along with other top plate formwork supporting frames, and symmetrically supporting the character-shaped disc buckle supporting rigid frame under top plate formworks and wood braces on two sides of a post-cast strip; before the top plate formwork is removed, the top plate formwork and a wood square column at the formwork supporting frame, away from the post-cast strip side, of the plate buckle supporting rigid frame shaped like the Chinese character'ji 'are disconnected, and an independent supporting system based on the plate buckle supporting rigid frame shaped like the Chinese character'ji' is formed; when the top plate structure reaches the form removal condition, all the peripheral forms are removed, and the independent supporting system is independently reserved; and finally, after the post-cast strip sealing condition is met, a formwork and a formwork support at the post-cast strip are erected, and concrete is poured to seal the post-cast strip. The advantages of the combined disc buckle supporting rigid frame are utilized, the construction structure and process design of the post-cast strip independent supporting system are matched, the supporting quality and safety performance of the post-cast strip part are comprehensively improved, and the construction measure cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of post-cast strip construction of buildings, in particular to a construction method of a post-cast strip independent support system. Background Art

[0002] The independent support of the post-cast strip is an indispensable part of the construction process of the building project. Its construction quality is directly related to the stability and safety of the basement roof. The formwork of the post-cast strip is required to be disconnected from the formwork of other parts and needs to be supported independently. The traditional method is generally to use steel pipe frames to build formwork frames or set structural columns for support.

[0003] The use of steel pipe racks has the problems of serious backlog of steel pipe fastener materials on site, high costs, and difficult on-site management. It is easy to be dismantled together with the internal support frame, and a large number of formwork frames make it difficult to pass through the basement, affecting subsequent construction. Setting up structural column support will waste concrete, fail to achieve material turnover, make on-site construction difficult (concrete needs to be poured in advance), need to be chiseled out later, high transportation costs, and high labor costs for labor projects. Therefore, it is urgent to find an independent support method that is both economical and safe.

[0004] At present, there are some support frames that serve as independent support systems for post-cast strips to support the post-cast strips, which can realize multiple turnover of consumables and save rental costs. However, how to design and construct the independent support system for post-cast strips and minimize the cost is still a major problem that needs to be solved. Summary of the invention

[0005] In view of the above-mentioned defects in the prior art, the present invention provides a construction method for an independent support system for a post-cast strip, which utilizes the advantages of a modular disc-type support frame and cooperates with the construction structure and process design of the independent support system for the post-cast strip to comprehensively improve the quality and safety performance of the support at the post-cast strip location, reduce the input of steel pipe materials, and greatly reduce the cost of construction measures.

[0006] To achieve the above object, the present invention provides a construction method of an independent support system for a post-cast belt, which is characterized by comprising the following steps:

[0007] Step S1, prefabricate a plurality of U-shaped buckle support frames;

[0008] Step S2, the U-shaped buckle support frame is set up together with other roof formwork frames, and is symmetrically supported on the roof formwork and wooden beams on both sides of the post-casting strip, with a spacing of no more than 1 / 2 of the span of the post-casting strip and no more than 4m; the U-shaped buckle support frame is simultaneously arranged at the bottom of the beam and the corner plate;

[0009] Step S3, before removing the top plate formwork, disconnect the top plate formwork and the wooden beam at the formwork frame away from the post-casting strip side of the U-shaped disc buckle support frame to form an independent support system based on the U-shaped disc buckle support frame;

[0010] Step S4: When the roof structure reaches the demoulding condition, all surrounding templates are removed, and the independent support system is left alone;

[0011] Step S5, when the conditions for closing the post-casting strip are met, set up the formwork and formwork support at the post-casting strip, and pour concrete to close the post-casting strip; when the concrete in the post-casting strip reaches the conditions for demolding, remove the independent support system and the newly set up bottom formwork frame of the post-casting strip together.

[0012] The construction method adopts a U-shaped disc-shaped support frame independent support plate, and disconnects the template at the independent support system of the post-casting strip when the surrounding template is removed, retaining the independent support system. This allows the technical solution to save a lot of materials, maintain smooth traffic in the building, and facilitate the deployment of the next construction process. It is an economical and safe independent support technology.

[0013] Furthermore, the U-shaped disc-buckle support frame includes four columns with top supports and adjustable bases distributed in a square shape; a number of disc-buckles are provided on the columns; a number of horizontal cross bars and diagonal braces are connected to adjacent columns through the disc-buckles and pins to form the U-shaped disc-buckle support frame.

[0014] Furthermore, in step S2, for a floor with beams, the U-shaped buckle support frame is supported under the beam so that the supporting force under the beam is strengthened to ensure that the structural beam has no deflection.

[0015] Furthermore, in step S2, the U-shaped buckle support frame is supported at a distance of 10 to 30 cm from the edge of the post-cast strip to ensure the rigidity of the top plate structure around the post-cast strip and reduce deformation of the top plate structure.

[0016] Furthermore, in step S2, when the top plate formwork is erected, a single layer of dense-hole wire mesh is respectively set up on both sides of the post-cast strip and fixed securely, the wire mesh is firmly tied to the bottom plate reinforcement and fixed with vertical reinforcement, and the upper steel bars on both sides of the post-cast strip are tied with steel wire and fixed with wooden strips to prevent concrete on both sides of the post-cast strip from flowing into the strip.

[0017] Furthermore, the overlapping length of the wire mesh is not less than 50 mm to ensure a firm overlap.

[0018] Furthermore, the 㗊-shaped disc support frame removed in step S4 is used for bottom reinforcement of the load-bearing part of the basement, thereby improving the reuse rate of materials.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention utilizes the advantages of the combined disc support frame and cooperates with the construction structure and process design of the post-casting zone independent support system to comprehensively improve the quality and safety performance of the post-casting zone support, reduce the input of steel pipe materials, and greatly reduce the cost of construction measures.

[0021] (2) The present invention disconnects the template at the independent support system of the post-cast strip when the surrounding templates are removed, and retains the independent support system, which can save a lot of materials and keep the traffic in the building unobstructed. When pouring the post-cast strip, there is no problem of a large amount of garbage on the bottom template that is difficult to clean up as in the traditional situation, which facilitates the deployment of the next construction process.

[0022] (3) The U-shaped disc support frame of the present invention can be transferred to other construction sites for use, and can also be used for bottom reinforcement of the load-bearing part of the basement, with a high recycling rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn completely to scale, and emphasis is placed on illustrating the subject matter of the present invention.

[0024] Figure 1 It is a schematic front view of a U-shaped buckle support frame in one embodiment of the present invention;

[0025] Figure 2 It is a top view schematic diagram of a U-shaped disc buckle support frame in one embodiment of the present invention;

[0026] Figure 3 It is a planar structural diagram of the construction step S2 of the post-casting belt independent support system in one embodiment of the present invention;

[0027] Figure 4 It is a structural elevation diagram of the construction step S2 of the post-cast belt independent support system in one embodiment of the present invention;

[0028] Figure 5 It is a structural elevation diagram of the construction step S4 of the post-cast belt independent support system in one embodiment of the present invention;

[0029] Figure 6 It is a planar structural diagram of the post-casting strip template erection in one embodiment of the present invention;

[0030] Among them, 1. U-shaped disc support frame; 2. Top plate formwork; 3. Wooden beam; 4. Formwork support; 5. Post-cast strip; 6. Steel pipe; 11. Top support; 12. Adjustable base; 13. Column; 14. Disc buckle; 15. Horizontal cross bar; 16. Diagonal brace; 17. Pin. DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be understood that all of these exemplary embodiments described are only partial embodiments and examples of the present invention, rather than all of them. On the contrary, these exemplary embodiments are provided so that those skilled in the art can more thoroughly understand the present disclosure and can more completely convey the technical content of the present disclosure to those skilled in the art.

[0032] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that well-known steps are not shown in detail to avoid obscuring the subject matter of the present invention. For example, for those of ordinary skill in the art, the specific meaning of the terms "erecting", "removing" formwork or formwork support in this application can be understood according to the specific circumstances.

[0033] Example

[0034] Taking the requirement that the width of the post-casting strip of the top plate of the beam-slab structure is 0.8 m as an example, this embodiment provides a construction method for an independent support system of the post-casting strip, including the following steps:

[0035] Step S1, prefabricate a plurality of 㗊-shaped buckle support frames 1. More specifically, see Figure 1 and Figure 2 , the 㗊-shaped disc buckle support frame 1 includes four columns 13 with top supports 11 and adjustable bases 12 distributed in a square; a number of disc buckles 14 are arranged on the columns 13; a number of horizontal cross bars 15 and diagonal braces 16 are connected to adjacent columns 13 through disc buckles 14 and pins 17 to form a 㗊-shaped disc buckle support frame 1. Calculated according to the length of 3200mm and the wall thickness of 3mm, the ultimate compressive bearing capacity of a single column is 40KN. In order to ensure the safety reserve of the independent support of the post-casting strip, the compressive bearing capacity of a single column is calculated as 20KN, and the compressive bearing capacity of a group of independent support combinations is at least 20×4=80KN, and the 㗊-shaped combination has better stability than a single one. According to the actual load, the specifications of the rods can also be customized, the pipe diameter, wall thickness and other parameters can be changed, the bearing capacity can be increased, and the requirements for independent support of the post-casting strip can be met.

[0036] Step S2, see Figure 3 and Figure 4, the U-shaped buckle support frame 1 is erected together with other top plate formwork frames, and the steel pipe 6 is used to symmetrically support the top plate formwork 2 and the wooden beam 3 on both sides of the post-casting strip 5, with a spacing of no more than 1 / 2 of the span of the post-casting strip; the U-shaped buckle support frame 1 is arranged at the bottom of the beam and the corner plate at the same time. During the process of erecting the top plate formwork frame, a single layer of dense mesh wire mesh with an aperture of 5mm is erected on both sides of the post-casting strip 5 and fixed firmly, and the lap length shall not be less than 50mm. The wire mesh and the bottom plate reinforcement shall be firmly tied and fixed with vertical reinforcement φ14@200. The upper steel bars on both sides of the post-casting strip 5 shall be tied with steel wire to fix the wooden strips to prevent the concrete on both sides of the post-casting strip from flowing into the strip. Preferably, the spacing of the U-shaped buckle support frame 1 on each side is no more than 4mm. For a floor with beams, the U-shaped buckle support frame 1 is supported under the beam to strengthen the support force under the beam and ensure that the structural beam has no deflection. The 㗊-shaped buckle support frame 1 is supported at a distance of 10 to 30 cm from the edge of the post-cast strip to ensure the rigidity of the top plate structure around the post-cast strip and reduce the deformation of the top plate structure.

[0037] Step S3, before removing the top plate formwork, disconnect the top plate formwork 2 and the wooden beam 3 at the formwork frame away from the post-casting strip side of the U-shaped disc buckle support frame to form an independent support system based on the U-shaped disc buckle support frame;

[0038] Step S4, see Figure 5 , when the roof structure reaches the demoulding condition, all surrounding templates are removed, and the independent support system is left alone;

[0039] Step S5, see Figure 6 , when the conditions for closing the post-casting strip are met, the formwork and formwork support at the post-casting strip are set up, and concrete is poured to close the post-casting strip. The post-casting strip support and the formwork support are separate and independent supports. When the post-casting strip concrete reaches the conditions for demolding, the independent support system and the newly set up post-casting strip bottom formwork frame are removed together. The removed 㗊-shaped disc buckle support frame can be used for the bottom top reinforcement of the basement load-bearing part, and can also be used in other construction sites to improve the reuse rate of materials.

[0040] From the above construction process, it can be seen that the construction method of the present invention adopts the U-shaped disc buckle support frame independent support plate, and disconnects the template at the independent support system of the post-casting strip when the surrounding template is removed, and retains the independent support system. This allows the technical solution to save a lot of materials and keep the traffic in the building unobstructed, making it easy to deploy the next construction process. It is an economical and safe independent support technology.

[0041] In summary, the present invention provides a construction method for an independent support system for a post-cast strip, firstly, a U-shaped disc buckle support frame is erected together with other roof formwork frames, and symmetrically supported under the roof formwork and wooden beams on both sides of the post-cast strip; before the roof formwork is removed, the U-shaped disc buckle support frame is disconnected from the roof formwork and wooden beams at the formwork frame away from the post-cast strip side, forming an independent support system based on the U-shaped disc buckle support frame; when the roof structure reaches the demoulding conditions, all the surrounding formworks are removed, and the independent support system is left alone; finally, when the conditions for closing the post-cast strip are reached, the formwork and formwork support at the post-cast strip are erected, and concrete is poured to close the post-cast strip. The present invention utilizes the advantages of the combined disc buckle support frame, cooperates with the construction structure and process design of the independent support system for the post-cast strip, comprehensively improves the quality and safety performance of the support at the post-cast strip position, and greatly reduces the cost of construction measures.

[0042] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A construction method for an independent support system of a post-cast belt, characterized in that: The following steps are involved: Step S1, prefabricate a plurality of U-shaped buckle support frames (1); Step S2, the U-shaped buckle support frame is set up together with other top plate formwork frames, and is symmetrically supported under the top plate formwork (2) and wooden beams (3) on both sides of the post-casting strip, with a spacing of no more than 1 / 2 of the span of the post-casting strip and no more than 4m; the U-shaped buckle support frame is simultaneously arranged at the bottom of the beam and the corner plate; Step S3, before removing the top plate formwork, disconnect the top plate formwork (2) and the wooden beam (3) at the formwork frame away from the post-casting strip side of the U-shaped disc buckle support frame to form an independent support system based on the U-shaped disc buckle support frame; Step S4: When the roof structure reaches the demoulding condition, all surrounding templates are removed, and the independent support system is left alone; Step S5: when the conditions for closing the post-casting strip are met, the formwork and formwork support (4) at the post-casting strip are set up, and concrete is poured to close the post-casting strip; when the concrete in the post-casting strip reaches the conditions for demoulding, the independent support system and the newly set up bottom formwork frame of the post-casting strip are removed together.

2. The construction method of the post-casting belt independent support system according to claim 1 is characterized in that: The U-shaped disc buckle support frame (1) comprises four columns (13) with top supports (11) and adjustable bases (12) arranged in a square pattern; a plurality of disc buckles (14) are provided on the columns (13); a plurality of horizontal cross bars (15) and diagonal braces (16) are connected to adjacent columns (13) via the disc buckles (14) and latches (17), thereby forming the U-shaped disc buckle support frame (1).

3. The construction method of the post-casting belt independent support system according to claim 1 is characterized in that: In the step S2, for a floor with beams, the U-shaped buckle support frame (1) is supported under the beams.

4. The construction method of a post-cast strip independent support system according to claim 1 or 3, characterized in that: In the step S2, the U-shaped buckle support frame (1) is supported at a distance of 10 to 30 cm from the edge of the post-cast strip.

5. The construction method of a post-cast strip independent support system according to claim 1 or 3, characterized in that: In step S2, when the top plate formwork is erected, a single layer of dense mesh wire mesh is respectively set up on both sides of the post-cast strip and fixed securely, the wire mesh is firmly tied to the bottom plate reinforcement and fixed with vertical reinforcement, and the upper steel bars on both sides of the post-cast strip are tied with steel wire to fix wooden strips.

6. The construction method of the post-casting belt independent support system according to claim 5 is characterized in that: The overlapping length of the wire mesh is not less than 50 mm.

7. The construction method of the post-casting belt independent support system according to claim 1 is characterized in that: The U-shaped disc buckle support frame removed in step S4 is used for bottom top reinforcement at the load-bearing part of the basement.

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