A high-rise external scaffolding triangular truss wall-connecting reinforcement structure

Abstract

This utility model discloses a triangular truss wall-connecting reinforcement structure for high-rise external scaffolding. The external scaffolding is fixedly connected to diagonal steel pipes at the upper end of a standard floor via swivel couplers. At the lower end of the standard floor along the building's outer edge, wall-connecting steel pipes are installed and fixedly connected to the external scaffolding via right-angle couplers. The diagonal steel pipes are fixedly connected to pre-embedded steel pipes in the already constructed floors via swivel couplers. The upper end of the diagonal bracing steel pipe is fixedly connected to the diagonal steel pipe via swivel couplers, and the lower end of the diagonal bracing steel pipe is fixedly connected to the wall-connecting steel pipe via swivel couplers, thus forming a stable triangular structure. This utility model is easy to operate, highly stable, simple in structure, highly efficient in construction, and uses readily available materials. The steel pipes can be reused. It is particularly suitable for non-standard floor construction scenarios with a floor height ≥ 5m and a span ≥ 8m, and can improve the wind pressure resistance and load-bearing capacity of the scaffolding.

Description

Technical Field

[0001] This utility model belongs to the field of scaffolding technology in construction engineering, and specifically relates to a triangular truss wall-connecting reinforcement structure for external scaffolding of high-rise buildings. Background Technology

[0002] In the construction of high-rise buildings (floor height > 5m) and large-span public buildings (span > 10m), traditional scaffolding wall ties are arranged according to the "two-step three-span" or "three-step three-span" rule. The design standard for covering an area of ​​≤40㎡ is only applicable to conventional standard floors. When the main structure cannot provide the wall tie attachment points required by the specifications, the calculated length coefficient μ of the uprights will significantly exceed the range of 1.5-2.0 specified in JGJ130-2011, leading to the risk of instability with a slenderness ratio exceeding 250.

[0003] Existing technical solutions have significant drawbacks: the pre-embedded steel pipe method requires cutting and sealing the pipe openings after concrete pouring, increasing construction steps and generating construction waste; the diagonal bracing method uses long diagonal braces >6m, requiring segmented welding, which is not only inefficient but also severely interferes with the erection of formwork support frames; the rigid column reinforcement method reduces column spacing by adding structural columns, but the cost increases by about 30% and is not economically viable. None of these solutions effectively address the special working conditions required for non-standard floors.

[0004] Industry practice shows that traditional rigid connection methods cannot adapt to high-rise and high-deformation structures. Actual measurements show that the tensile deviation rate of wall ties reaches as high as 40% when the span is greater than 5m. Meanwhile, the low reuse rate of embedded parts leads to a 25% wastage rate, resulting in resource waste. A more prominent problem is that horizontal diagonal bracing occupies working space, directly delaying subsequent processes such as curtain wall installation and wall construction. Existing technical solutions present irreconcilable contradictions in terms of functionality, economy, and construction efficiency, urgently requiring a breakthrough solution. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a high-rise external scaffolding triangular truss wall-connecting reinforcement structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A triangular truss wall-connected reinforcement structure for high-rise external scaffolding includes external scaffolding, wall-connecting steel pipes, diagonal tie steel pipes, diagonal bracing steel pipes, and embedded steel pipes. Specifically: the external scaffolding is fixedly connected to the diagonal tie steel pipes at the upper end of a standard floor via swivel couplers; wall-connecting steel pipes are installed at the outer edge of the building at the lower end of a standard floor, and are fixedly connected to the external scaffolding via right-angle couplers; the diagonal tie steel pipes are fixedly connected to the embedded steel pipes in the constructed floors via swivel couplers; the upper end of the diagonal bracing steel pipes is fixedly connected to the diagonal tie steel pipes via swivel couplers, and the lower end of the diagonal bracing steel pipes is fixedly connected to the wall-connecting steel pipes via swivel couplers; thus forming a stable triangular structure.

[0008] As a preferred technical solution of this utility model, the end of the wall-connecting steel pipe is provided with an anti-slip fastener.

[0009] As a preferred technical solution of this utility model, anti-slip fasteners are provided at both ends of the inclined steel pipe.

[0010] As a preferred technical solution of this utility model, the structure has reinforcing ribs in the constructed layer, and the reinforcing ribs are welded to the pre-embedded steel pipes. When dismantling, the pre-embedded steel pipes are cut along the wall edge.

[0011] As a preferred technical solution of this utility model, the wall-connecting steel pipe is connected to a steel plate in the wall of the constructed layer of the structure by welding. The embedded iron parts on the steel plate are firmly tied to the main reinforcement in the constructed layer of the structure, and are poured into a whole with concrete with a strength ≥ C25. When dismantling, the steel pipe can be cut off and there are no residual holes on the wall surface.

[0012] As a preferred technical solution of this utility model, a longitudinal connecting steel pipe is set at the intersection of the inclined steel pipe and the inclined bracing steel pipe to limit the lateral displacement of the truss to ≤3mm.

[0013] As a preferred technical solution of this utility model, the tightening torque of each fastener should be controlled within the range of 40 to 65 N·m, and the fasteners include right-angle fasteners and swivel fasteners.

[0014] As a preferred technical solution of this utility model, a triangular stabilizing structure is provided every two spans longitudinally.

[0015] The present invention has the following advantages:

[0016] 1. Spatial adaptability: It adopts pre-embedded steel pipes (embedding depth ≥100mm) and adjustable inclined steel pipes and inclined bracing steel pipes to adapt to the needs of non-standard floors with a floor height of 5-10m and a span of 8-15m;

[0017] 2. Dual constraint mechanism: The inclined steel pipe and the inclined bracing steel pipe form a "tension-compression composite force", which greatly improves the tensile bearing capacity and increases the overturning resistance of the external scaffold by 50% compared with the traditional scheme;

[0018] 3. Standardized installation: The inclined steel pipes and inclined bracing steel pipes are quickly assembled using fasteners, which improves construction efficiency by 50%, and the steel pipes can be reused.

[0019] 4. The deformation of the external scaffolding using this technology meets the requirements of the "Safety Technical Standard for Socket-type Disc-lock Steel Pipe Scaffolding in Building Construction" JGJ / T231-2021, providing reliable protection for the construction of high-rise buildings. Attached Figure Description

[0020] Figure 1 This is a layout plan of a high-rise external scaffolding triangular truss wall-connecting reinforcement structure.

[0021] Figure 2 A schematic cross-sectional view of a triangular truss wall-connecting reinforcement structure for high-rise external scaffolding;

[0022] Figure 3 Detailed drawing of embedded steel pipes for a triangular truss wall-connecting reinforcement structure of a high-rise external scaffolding;

[0023] Figure 4 This is a detailed drawing of the welding of steel pipes for a wall-connecting reinforcement structure of a triangular truss for high-rise external scaffolding.

[0024] In the diagram: 1. External scaffolding; 2. Wall ties; 3. Anti-slip couplers; 4. Right-angle couplers; 5. Swivel couplers; 6. Embedded iron parts; 7. Reinforcing ribs; 8. Embedded steel pipes; 9. Diagonal tie steel pipes; 10. Diagonal bracing steel pipes; 11. Longitudinal connecting steel pipes; 12. Formwork support frame; 13. Building outer edge; 14. Steel plate; 15. Existing structural floors. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In one embodiment, see Figures 1-4 The high-rise external scaffolding triangular truss wall-connecting reinforcement structure in this embodiment includes external scaffolding 1, wall-connecting steel pipe 2, diagonal steel pipe 9, diagonal bracing steel pipe 10, and pre-embedded steel pipe 8.

[0027] The external scaffolding 1 is fixedly connected to the inclined steel pipe 9 at the upper end of a standard floor by a swivel coupler 5; at the outer edge 13 of the building at the lower end of a standard floor, the external scaffolding 1 is fixedly connected to the wall-connecting steel pipe 2 by a right-angle coupler 4; the inclined steel pipe 9 is fixedly connected to the pre-embedded steel pipe 8 in the structurally constructed floor 15 by a swivel coupler 5; the upper end of the inclined bracing steel pipe 10 is fixedly connected to the inclined steel pipe 9 by a swivel coupler 5, and the lower end is fixedly connected to the wall-connecting steel pipe 2 by a swivel coupler 5; thus forming a triangular stable structure.

[0028] In one embodiment, anti-slip fasteners 3 are provided at the ends of the wall-connecting steel pipe 2. Anti-slip fasteners 3 are also provided at both ends of the inclined steel pipe 9. The anti-slip fasteners 3 at the ends can effectively prevent the connection from slipping, increasing safety.

[0029] In one aspect of this embodiment, combined with Figure 2 and Figure 4 As shown, the embedded steel pipe 8 is connected to the reinforcing rib 7 in the constructed layer 15 by welding. During dismantling, the steel pipe can be directly cut along the wall edge without removing the embedded structure. The wall-connecting steel pipe 2 is connected to the steel plate 14 by welding. The embedded iron parts 6 on the steel plate are firmly tied to the main reinforcing ribs in the constructed layer 15. The steel plate is located within the wall and fixed with concrete of strength ≥ C25. Both the wall-connecting steel pipe 2 and the steel plate 14 are completely embedded in the wall and compacted with concrete of C25 or higher. During dismantling, after cutting along the wall edge, both the end of the steel pipe and the steel plate are below the concrete surface, and the wall surface is flat without exposed holes.

[0030] In one embodiment, a longitudinal connecting steel pipe 11 is provided at the intersection of the diagonal tie steel pipe 9 and the diagonal brace steel pipe 10 to limit the lateral displacement of the truss to ≤3mm, thereby further enhancing stability.

[0031] In one embodiment, the tightening torque of each right-angle fastener or swivel fastener should be controlled within the range of 40 to 65 N·m to ensure the anti-slip force between the fastener and the steel pipe and to prevent the bolts from loosening or breaking due to over-tightening.

[0032] In one embodiment, a triangular stabilizing structure is installed every two spans longitudinally. After the external scaffolding 1 is erected and secured to the required standard along the floor height, the formwork support frame 12 is erected, and then the construction of the next floor is carried out in sequence.

[0033] The specific construction steps include:

[0034] 1) Process Flow

[0035] Positioning and layout → Processing wall-connecting steel pipes and pre-embedded steel pipes → Fixing pre-embedded steel pipes and steel plates → Welding wall-connecting steel pipes and pre-embedded steel pipes → Erecting external scaffolding → Erecting diagonal tie steel pipes and diagonal bracing steel pipes to form a triangular stable structure → Continue erecting external scaffolding → Construction of the upper structure → Repeat the above operations on the external scaffolding until the structure is completed.

[0036] 2) Key Process Points

[0037] Step 1: Positioning and layout: Before pouring concrete on the floor, position and layout the pre-embedded steel pipes 8, reinforcing bars 7, pre-embedded iron parts 6, and steel plates 14 according to the plan.

[0038] Step 2: Processing the wall-connecting steel pipe 2 and the pre-embedded steel pipe 8: Before welding, the surface oil and rust must be cleaned to ensure good fusion.

[0039] Step 3: Fixing the embedded steel pipe 8 and steel plate 14: After the positioning and layout are completed, position the steel plate 14 and the embedded iron parts 6 on the outer edge line 13 of the building and fix them by welding. Then, weld the embedded steel pipe 8 to the floor slab. The weld should be uniform and full, with a weld leg height ≥0.5d (HPB235) or 0.6d (HRB335 / HRB400), and the length of the double-sided fillet weld should be ≥5d. The weld surface should be smooth and free from defects such as porosity, slag inclusion, undercut (depth ≤0.5mm), and cracks. During concrete pouring, be careful not to touch the embedded parts during vibration. If any deviation occurs, adjust and restore it in time.

[0040] Step 4: Welding the wall tie steel pipe 2 and the embedded steel pipe 8: After the beam side formwork is removed, clean the surface of the steel plate 14, and weld the 500mm long wall tie steel pipe 2. Fully weld around the perimeter, with a weld height of not less than 5mm. The wall tie steel pipe 2 should be perpendicular to the scaffold facade and the wall. Wall ties on the same floor should be on the same plane, with a horizontal spacing of 2 spans. The wall tie steel pipe 2 should be installed close to the main node, and the distance from the main node should not exceed 300mm. The wall ties should be securely connected to the uprights of the external scaffold 1 using right-angle couplers 4, and anti-slip couplers 3 should be installed.

[0041] Step 5: Erecting the external scaffolding 1: The first-floor uprights should be arranged in a staggered pattern with varying lengths, with a vertical spacing of no less than 500mm. The uprights should be connected via connecting sleeves. Along the longitudinal direction of the outer side of the scaffolding, one vertical diagonal brace should be installed every three spans per floor, arranged in a figure-eight pattern. A vertical diagonal brace should also be installed horizontally on each floor of the end spans, continuously from bottom to top. All diagonal braces should be reinforced using self-locking disc braces. The height of each erection should not exceed two steps beyond the required wall ties.

[0042] Step 6: Erecting the diagonal bracing steel pipes 9 and 10 to form a triangular stable structure: After the scaffolding has been erected for two steps, the diagonal bracing steel pipes 9 are installed and connected to the pre-embedded steel pipes 8. At the same time, the 10 diagonal bracing steel pipes 10 are installed in the middle of the diagonal bracing steel pipes 9 and connected to the wall-connecting steel pipes 2 to form a triangular stable structure. Adjacent triangular stable structures are connected by longitudinal connecting steel pipes 11. Each layer of triangular stable structure should be inspected and accepted after installation. Only after passing the inspection can the external scaffolding 1 be erected upwards.

[0043] Step 7: Continue to erect the external scaffolding: The height of the external scaffolding should be at least 1.5m above the working level to ensure the safety of construction workers.

[0044] Step 8: Construction of the superstructure

[0045] Step 9: Repeat the above operations for external scaffolding 1 until the structure is completed.

[0046] External scaffolding should be erected, inspected, and used in sections, and can only be used after passing the inspection.

[0047] The embodiments described above are for illustrative purposes only and are not intended to limit the scope of this utility model. All equivalent changes and modifications made to this utility model by those skilled in the art should fall within the scope of the appended claims.

Claims

1. A triangular truss wall-connecting reinforcement structure for high-rise external scaffolding, characterized in that, This includes external scaffolding, wall ties, diagonal tie steel pipes, diagonal bracing steel pipes, and embedded steel pipes; among which: The external scaffolding is fixedly connected to the inclined steel pipe at the upper end of a standard floor by a swivel coupler; At the outer edge of the building at the lower end of a standard floor, a wall-connecting steel pipe is installed, and the wall-connecting steel pipe is fixedly connected to the external scaffolding by right-angle couplers; The inclined steel pipe is fixedly connected to the pre-embedded steel pipe in the already constructed layer of the structure through the swivel fastener; The upper end of the diagonal bracing steel pipe is fixedly connected to the diagonal tie steel pipe through the swivel fastener, and the lower end of the diagonal bracing steel pipe is fixedly connected to the wall-connecting steel pipe through the swivel fastener. This forms a stable triangular structure.

2. The high-rise external scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that, The end of the wall-connecting steel pipe is equipped with an anti-slip fastener.

3. The high-rise external scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that, Anti-slip fasteners are installed at both ends of the inclined steel pipe.

4. The high-rise external scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that, The structure has reinforcing ribs installed in the constructed layer. The reinforcing ribs are welded to the embedded steel pipes. When dismantling, the embedded steel pipes are cut along the wall edge.

5. A high-rise, high-rise scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that, The wall-connecting steel pipe is connected to a steel plate in the wall of the constructed layer of the structure by welding. The embedded iron parts on the steel plate are firmly tied to the main reinforcement in the constructed layer of the structure and are poured into a whole with concrete with a strength ≥ C25. When dismantling, the steel pipe can be cut off and there are no residual holes on the wall surface.

6. The high-rise external scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that: A longitudinal connecting steel pipe is provided at the intersection of the inclined tie steel pipe and the inclined brace steel pipe to limit the lateral displacement of the truss to ≤3mm.

7. The high-rise external scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that: The tightening torque of each fastener should be controlled within the range of 40 to 65 N·m, and the fasteners include the right-angle fastener and the swivel fastener.

8. A high-rise external scaffolding triangular truss wall-connecting reinforcement structure according to claim 1, characterized in that, The triangular stabilizing structure is set every two spans longitudinally.

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