Recyclable external scaffold and tying method thereof

Abstract

The invention belongs to the technical field of external scaffold construction, and particularly relates to a recyclable external scaffold and a tying method thereof.The recyclable external scaffold comprises a structural formwork and a structural floor formed above the structural formwork in a post-casting mode; the external scaffold further comprises an external scaffold body and a pulling assembly, the external scaffold body comprises external scaffold vertical rods and longitudinal and transverse horizontal rods, and the external scaffold vertical rods are detachably connected with the longitudinal and transverse horizontal rods through first connecting fasteners; the tying assembly comprises a wall connecting piece vertical rod, a sleeve, a T-shaped embedded part, a nut and a wall connecting piece horizontal steel pipe, the wall connecting piece vertical rod is fixedly connected with the sleeve, the sleeve is provided with a threaded hole, the T-shaped embedded part is threaded and is in threaded connection with the sleeve, and the wall connecting piece horizontal steel pipe is obliquely connected with the wall connecting piece vertical rod and the external scaffold vertical rod through a second connecting fastener. It is ensured that the free end of the external scaffold does not exceed 4 m required by the specification, and meanwhile recycling of the embedded part is achieved.

Description

Technical Field

[0001] This invention relates to the field of external scaffolding construction technology, specifically to a reusable external scaffolding and its tying method. Background Technology

[0002] In construction engineering, cantilevered scaffolding is a commonly used high-altitude work support equipment, and the setting of tie points directly affects the construction safety and compliance with construction specifications. Currently, in many construction projects, the setting of tie points for cantilevered scaffolding often does not meet the requirements of construction specifications, posing significant safety hazards.

[0003] The standard floor height of existing residential buildings is typically around 3 meters, with an external scaffolding step distance of 1.8 meters. According to the "General Specification for Construction Scaffolding" (GB 55023-2022), the height of a single scaffolding erection should not exceed two step distances from the top wall tie, and should not exceed 4 meters, to ensure construction safety. However, using the traditional tie-point method, the cantilever length above the tie point can easily exceed 4 meters before the completion of the upper floor structure, failing to meet the specification requirements and posing a significant safety risk. Furthermore, traditional external scaffolding tie points are often directly embedded in the main structural beams or shear walls, making them impossible to remove and recycle after construction, resulting in significant material waste and increased construction costs. Summary of the Invention

[0004] The present invention addresses the problems mentioned above by designing a reusable external scaffold and its tying method to overcome the deficiencies of the prior art.

[0005] To achieve the above objectives, the present invention provides a reusable external scaffolding, including a structural template and a structural floor slab cast in post-formed on top of the structural template. It also includes an external scaffolding body and a tie-in assembly. The external scaffolding body includes external scaffolding uprights and longitudinal and transverse horizontal bars, which are detachably connected to the longitudinal and transverse horizontal bars via a connecting fastener. The tie-in assembly includes a wall tie upright, a sleeve, a T-shaped embedded part, a nut, and a wall tie horizontal steel pipe. The wall tie upright is fixedly connected to the sleeve, and the sleeve has a threaded hole. The T-shaped embedded part is threaded and threadedly connected to the sleeve. The wall tie horizontal steel pipe is obliquely connected to the wall tie upright and the external scaffolding upright respectively via a connecting fastener.

[0006] Furthermore, the T-shaped embedded part is covered with a T-shaped plastic protective sleeve, which is fixedly connected to the structural template by iron nails.

[0007] Furthermore, the threaded end of the T-shaped embedded part is wrapped with a plastic film to prevent contamination of the threaded end during the concrete pouring of the structural floor slab.

[0008] Furthermore, the T-shaped embedded part is threaded with a nut to press the structural floor slab tightly.

[0009] The present invention also includes a method for tying up reusable external scaffolding, comprising the following steps: Step 1: Protective treatment of T-shaped embedded parts. Insert the T-shaped embedded parts into the T-shaped plastic protective sleeve, and then wrap the threaded end of the T-shaped embedded parts with plastic film and tape to prevent the threaded end from being contaminated by concrete. Step 2: Fixing the T-shaped embedded parts. Before pouring the concrete for the structural floor slab, fix the T-shaped plastic protective sleeves, which are fitted over the T-shaped embedded parts, to the preset points of the structural formwork with nails. Step 3: Pour the structural floor slab above the structural formwork. After the concrete of the structural floor slab has been poured and reached the preset strength, remove the plastic film and tighten the nuts and T-shaped embedded parts with the threaded ends. Step 4: Tighten the welded parts of the wall tie rod and sleeve onto the T-shaped embedded part; Step 5: Connect the main body of the external scaffold. Connect the horizontal steel pipe of the wall tie to the wall tie upright and the external scaffold upright respectively through the connecting coupler 2 to complete the tie and fixation of the external scaffold. Step 6: Component recycling. After the concrete strength of the structural floor slab reaches the required level, remove the structural formwork, take out the T-shaped embedded parts, clean them, and set them aside for later use.

[0010] Furthermore, in step two, the preset points are determined based on the step distance, upright spacing and construction specifications of the main body of the external scaffold, to ensure that the free end length of the main body of the external scaffold does not exceed 4m after the connection.

[0011] Furthermore, in step three, the preset strength is that the strength of the structural floor slab concrete reaches more than 75% of the design strength.

[0012] Furthermore, in step five, at the connection between the horizontal steel pipe of the wall tie and the vertical pole of the wall tie and the vertical pole of the external scaffold, the connecting fastener two must be tightened without loosening to ensure the stability of the tie structure.

[0013] In summary, the present invention has the following advantages and beneficial technical effects: 1. This invention forms a stable tie structure through the threaded connection between the T-shaped embedded part and the sleeve, and the oblique support of the horizontal steel pipe of the wall tie, which effectively limits the horizontal displacement and vertical sway of the external scaffold body.

[0014] 2. This invention, through the design of detachable tie components, allows T-shaped embedded parts, wall tie uprights, sleeves, nuts, and horizontal steel pipes connecting the wall to be removed, cleaned, and reused after construction. This eliminates the drawbacks of traditional tie points being directly embedded and unable to be recycled, significantly reducing material waste and lowering construction costs.

[0015] 3. This invention, through the oblique connection design of the horizontal steel pipe of the wall tie and the reasonable layout of the embedded parts, ensures that the length of the free end above the top tie point of the external scaffold does not exceed 4m when the upper layer structure is not completed, which strictly meets the requirements of the construction specifications, effectively eliminates the safety hazards caused by the excessive height of the free end, and improves the safety of high-altitude operations.

[0016] 4. In this invention, a T-shaped plastic protective sleeve is fitted over the outside of the T-shaped embedded part to isolate the concrete from direct contact with the embedded part; a plastic film is used to wrap the threaded end of the T-shaped embedded part to prevent concrete mortar from contaminating the threaded end and affecting the threaded connection with the sleeve; and iron nails are used to fix the T-shaped plastic protective sleeve together with the T-shaped embedded part to the structural formwork to ensure that the position of the embedded part does not shift during the pouring of the floor slab concrete. Attached Figure Description

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partially enlarged schematic diagram of the present invention.

[0018] The reference numerals in the attached figures are: 1. Wall tie uprights; 2. Sleeves; 3. T-shaped embedded parts; 4. T-shaped plastic protective sleeves; 5. Nails; 6. Nuts; 7. Horizontal steel pipes for wall ties; 8. Longitudinal and transverse horizontal bars; 9. External scaffold uprights; 10. Connecting fasteners; 11. Plastic film; 12. Structural formwork; 13. Structural floor slabs; 14. Upper structural floor slabs; 15. Upper structural beams. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings: The following is in conjunction with the appendix Figures 1-2 The present invention will be further described in detail below: Example 1 like Figures 1-2 As shown, this embodiment discloses a reusable external scaffold, including a structural template 12 and a structural floor slab 13 cast on top of the structural template 12. It also includes an external scaffold body and a tie assembly. The external scaffold body includes external scaffold uprights 9 and longitudinal and transverse horizontal bars 8. The external scaffold uprights 9 and longitudinal and transverse horizontal bars 8 are detachably connected by a connecting fastener. The tie assembly includes a wall tie upright 1, a sleeve 2, a T-shaped embedded part 3, a nut 6, and a wall tie horizontal steel pipe 7. The wall tie upright 1 is welded to the sleeve 2. The sleeve 2 is provided with a threaded hole. The T-shaped embedded part 3 is threaded and threadedly connected to the sleeve 2. The wall tie horizontal steel pipe 7 is obliquely connected to the wall tie upright 1 and the external scaffold upright 9 by a connecting fastener 10.

[0020] like Figure 2 As shown, the T-shaped embedded part 3 is covered with a T-shaped plastic protective sleeve 4, which is fixedly connected to the structural formwork 12 by nails 5. The threaded end of the T-shaped embedded part 3 is wrapped with a plastic film 11 to prevent the thread from being contaminated during the concrete pouring of the structural floor slab 13. The T-shaped embedded part 3 is threaded with a nut 6 to tighten the structural floor slab 13.

[0021] Example 2 The present invention provides a method for tying up reusable external scaffolding as follows: Step 1: Protective treatment of T-shaped embedded part 3. Insert the T-shaped embedded part 3 into the T-shaped plastic protective sleeve 4, and then wrap the threaded end of the T-shaped embedded part 3 with plastic film 11 and tape to prevent the threaded end from being contaminated by concrete.

[0022] Step 2: Fixing the T-shaped embedded part 3. Before pouring the concrete of the structural floor slab 13, fix the T-shaped plastic protective sleeve 4, which is fitted outside the T-shaped embedded part 3, to the preset point of the structural formwork 12 with iron nails 5. The preset point is determined according to the step distance of the main body of the external scaffold, the spacing of the external scaffold uprights 9 and the requirements of the construction specifications, to ensure that the length of the free end of the main body of the external scaffold does not exceed 4m after the tie.

[0023] Step 3: Pour the structural floor slab 13 on top of the structural formwork 12. After the concrete of the structural floor slab 13 is poured and reaches the preset strength (the preset strength is more than 75% of the design strength) to meet the subsequent construction load requirements, remove the plastic film 11 and tighten the nut 6 with the threaded end of the T-shaped embedded part 3.

[0024] Step 4: Tighten the welded parts of the wall tie rod 1 and sleeve 2 onto the T-shaped embedded part 3.

[0025] Step 5: Connecting the main body of the external scaffolding. Connect the horizontal steel pipe 7 of the wall tie to the wall tie upright 1 and the external scaffold upright 9 diagonally using connecting couplers 2 10, thus completing the tying and fixing of the main body of the external scaffolding. Connecting couplers 2 10 must be tightened securely to ensure the stability of the tying structure. The horizontal steel pipe 7 of the wall tie is set diagonally to reduce the impact on the construction of the upper structural floor slab 14 and upper structural beam 15.

[0026] Step 6: Component recycling. After the concrete strength of the structural floor slab 13 reaches the required level, the structural formwork 12 is removed, the T-shaped embedded parts 3 are taken out, cleaned and put into use, so as to realize the recycling of components.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reusable external scaffolding, comprising structural formwork and a structural floor slab cast in post-formed formwork above the structural formwork, characterized in that: It also includes the main body of the external scaffold and the tie assembly. The main body of the external scaffold includes external scaffold uprights and longitudinal and transverse horizontal bars. The external scaffold uprights and longitudinal and transverse horizontal bars are detachably connected by a connecting fastener. The tie assembly includes a wall tie upright, a sleeve, a T-shaped embedded part, a nut, and a wall tie horizontal steel pipe. The wall tie upright is fixedly connected to the sleeve. The sleeve has a threaded hole. The T-shaped embedded part is threaded and threadedly connected to the sleeve. The wall tie horizontal steel pipe is obliquely connected to the wall tie upright and the external scaffold upright respectively by a connecting fastener.

2. The reusable external scaffolding according to claim 1, characterized in that: The T-shaped embedded part is covered with a T-shaped plastic protective sleeve, which is fixed to the structural template by iron nails.

3. The reusable external scaffolding according to claim 1, characterized in that: The threaded end of the T-shaped embedded part is wrapped with a plastic film to prevent the thread from being contaminated during the concrete pouring of the structural floor slab.

4. A reusable external scaffolding according to claim 3, characterized in that: The T-shaped embedded part is threaded with a nut to tighten the structural floor slab.

5. A method for tying up reusable external scaffolding, characterized in that: The method for tying up reusable external scaffolding as described in claim 1 includes the following steps: Step 1: Protective treatment of T-shaped embedded parts. Insert the T-shaped embedded parts into the T-shaped plastic protective sleeve, and then wrap the threaded end of the T-shaped embedded parts with plastic film and tape to prevent the threaded end from being contaminated by concrete. Step 2: Fixing the T-shaped embedded parts. Before pouring the concrete for the structural floor slab, fix the T-shaped plastic protective sleeves, which are fitted over the T-shaped embedded parts, to the preset points of the structural formwork with nails. Step 3: Pour the structural floor slab above the structural formwork. After the concrete of the structural floor slab has been poured and reached the preset strength, remove the plastic film and tighten the nuts and T-shaped embedded parts with the threaded ends. Step 4: Tighten the welded parts of the wall tie rod and sleeve onto the T-shaped embedded part; Step 5: Connect the main body of the external scaffold. Connect the horizontal steel pipe of the wall tie to the wall tie upright and the external scaffold upright respectively through the connecting coupler 2 to complete the tie and fixation of the main body of the external scaffold. Step 6: Component recycling. After the concrete strength of the structural floor slab reaches the required level, remove the structural formwork, take out the T-shaped embedded parts, clean them, and set them aside for later use.

6. The method for tying up reusable external scaffolding according to claim 5, characterized in that: In step two, the preset points are determined based on the step distance, upright spacing and construction specifications of the main body of the external scaffold, to ensure that the free end length of the main body of the external scaffold does not exceed 4m after the connection.

7. The method for tying up reusable external scaffolding according to claim 5, characterized in that: In step three, the preset strength is that the strength of the structural floor slab concrete reaches more than 75% of the design strength.

8. A method for tying up reusable external scaffolding according to claim 5, characterized in that: In step five, at the connection between the horizontal steel pipe of the wall tie and the vertical pole of the wall tie and the vertical pole of the external scaffold, the connecting fastener two must be tightened without loosening to ensure the stability of the tie structure.

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