A type steel Y type lower support cantilever formwork disc buckle scaffold system

Abstract

The utility model provides a kind of profile steel Y type under bracing cantilever formwork disc buckle scaffold system, including cantilever girder, for anchoring in main structure and as main horizontal load-bearing component;Y type under bracing component, be set in the below of the cantilever girder, its upper end is connected with the cantilever girder, lower end anchoring in lower layer main structure, for load transmission to lower structure;I-beam, be set in the above of the cantilever girder, and adjacent cantilever girder is connected into whole;Disc buckle type scaffold, erect in the cantilever girder and / or I-beam, for supporting formwork system.The utility model constitutes a kind of cantilever formwork bracing system with high bearing capacity, small deformation, outstanding stability and efficient construction, especially applicable to high-altitude, large-span cantilever structure construction.

Description

Technical Field

[0001] This utility model relates to a steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system. Background Technology

[0002] In modern high-rise and large-span building construction, steel cantilever formwork support systems are widely used. Currently, the commonly used I-beam or steel pipe cantilever support systems have problems such as insufficient lateral stiffness, large deflection at the cantilever end, and poor overall stability, especially under large span (≥3m) and high load conditions, where safety risks are particularly prominent.

[0003] To address the aforementioned issues, composite steel cantilever systems incorporating diagonally downward-stretching components have emerged. However, existing support systems often employ single diagonal braces, resulting in large calculated lengths, poor slenderness ratios, limited stability of the compression members, and suboptimal force transmission paths, making it difficult to meet the stringent requirements of long cantilevered structures with high ceilings. Therefore, a novel cantilever formwork support system with a more rational structure, clearer force transmission, and higher stability is urgently needed. Utility Model Content

[0004] This utility model provides a steel Y-shaped under-braced cantilevered formwork disc-lock scaffolding system, which can effectively solve the above problems.

[0005] This utility model is implemented as follows: A steel Y-shaped under-braced cantilevered formwork disc-lock scaffolding system, including The cantilevered main beam is used to anchor to the main structure and serves as the main horizontal load-bearing component. The Y-shaped lower support component is located below the cantilever main beam. Its upper end is connected to the cantilever main beam, and its lower end is anchored to the lower main structure. It is used to transfer the load to the lower structure. I-beam connecting beams are installed on the cantilever main beams and connect adjacent cantilever main beams into a whole; The disc-lock scaffolding is erected on the cantilevered main beam and / or I-beam connecting beam to support the formwork system.

[0006] The beneficial effects of this utility model are: (1) This utility model effectively decomposes the load at the cantilever end and directly transfers it to the lower main structure by setting the Y-shaped support component below the cantilever main beam, which significantly reduces the bending moment and deflection at the root of the cantilever. At the same time, the adjacent cantilever main beams are connected into an integral spatial frame by using the I-beam connecting beam, which greatly enhances the lateral stiffness and overall stability of the system. Combined with modular and high-rigidity disc-lock scaffolding, it forms a cantilever formwork support system with high load-bearing capacity, small deformation, excellent stability and high construction efficiency, which is particularly suitable for high-altitude and large-span cantilever structure construction. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0008] Figure 1 This is a cross-sectional view of the present invention.

[0009] Figure 2 This is a structural schematic diagram of the Y-shaped lower support component of this utility model.

[0010] Explanation of icon numbers: 10. Y-shaped lower support component; 100. Diagonal brace; 102. Support rod; 104. Anchor plate; 106. Connecting plate; 20. Cantilever main beam; 30. I-beam connecting beam; 40. Disc buckle upright; 50. Coupler; 60. Vertical diagonal tie rod; 70. Horizontal scissor brace; 80. Triangular disc buckle frame; 90. Perforated mesh; 110. Stamped steel scaffold board. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0012] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0013] Reference Figure 1-2 As shown, a steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system includes... The cantilever main beam 20 is used to anchor to the main structure and serve as the main horizontal load-bearing component. The cantilever main beam 20 is double-anchored by U-bolts and pressure plates. The bottom of the disc-lock uprights 40 of the disc-lock scaffold is connected to the cantilever main beam 20 by positioning steel bar heads.

[0014] Y-shaped lower support member 10 is disposed below the cantilever main beam 20. Its upper end is connected to the cantilever main beam 20, and its lower end is anchored to the lower main structure. It is used to transfer the load to the lower structure. The Y-shaped lower support member 10 includes a lower support main rod 100 and two support rods 102 that are forked at the top of the lower support main rod 100, forming a Y-shaped branch structure. The bottom of the Y-shaped lower support member 10 is provided with an anchor plate 104 for anchoring to the lower main structure. The lower support main rod 100 and the support rods 102 are fixedly connected by a connecting plate 106.

[0015] Specifically, the core function of the Y-shaped lower support member 10 is to provide an efficient secondary force transmission path for the cantilever system, directly transferring the load to the lower structure, thereby significantly reducing the bending moment at the root of the cantilever. Structurally, the member consists of a lower support main rod 100 and two support rods 102 branched at its top, forming a stable Y-shaped branch system. This decomposes the concentrated load of a traditional single diagonal brace into two support points, effectively shortening the calculated length of the diagonal brace and greatly improving the stability of the compression member. To achieve reliable force transmission, the lower support main rod 100 and the support rods 102 are fixedly connected by a rigid connecting plate 106, while an anchor plate 104 is provided at the bottom of the member, which is firmly connected to the lower building structure through an anchoring device. Finally, a complete and efficient load-bearing and force transmission system is formed from "branch force" to "main rod convergence" and then to "bottom anchoring".

[0016] The angle of the diagonal brace of support rod 102 is 45°. It should be noted that, according to the parallelogram law of forces, when a vertical force needs to be borne by a diagonal brace, the angle of the brace determines the magnitude of its internal force. At a 45° angle, the pressure on the diagonal brace is approximately 1.414 times (√2 ​​times) the required vertical force. This angle achieves equality between the vertical and horizontal components of the force, meaning that the support rod can effectively support the vertical load, and the horizontal thrust it generates is also at a level comparable to the vertical force. If the angle is steeper (e.g., 60°), the internal force of the rod decreases, but the horizontal thrust increases significantly, requiring stronger anchorage. If the angle is gentler (e.g., 30°), the horizontal thrust decreases, but the internal force of the rod increases sharply, requiring thicker rods and resulting in poor economic efficiency. 45° strikes an ideal balance between these two extremes.

[0017] The I-beam connecting beam 30 is set on the cantilever main beam 20 and connects the adjacent cantilever main beams 20 into a whole; the I-beam connecting beam 30 is fixedly connected to the cantilever main beam 20 by U-shaped clamps.

[0018] Specifically, the I-beam connecting beam 30 is a horizontal secondary beam erected on the adjacent cantilever main beam 20, thereby connecting the originally independent cantilever main beams 20 into a cooperating overall frame. When the load is uneven, the I-beam connecting beam 30 coordinates the deformation between the cantilever main beams 20, preventing "lone wolf" operation and avoiding local instability caused by excessive deformation of a single main beam. It can also redistribute the load transmitted by the disc-lock uprights 40 more evenly to the adjacent cantilever main beams 20, optimizing the force distribution. It also provides more and more flexible erection support points for the uprights of the disc-lock scaffolding. The uprights can be erected on the cantilever main beams or the connecting beams, enhancing the stability of the upper structure.

[0019] The disc-lock scaffolding is erected on the cantilever main beam 20 and / or the I-beam connecting beam 30 to support the formwork system. The disc-lock scaffolding includes multiple disc-lock uprights 40 and horizontal bars fixed to the disc-lock uprights 40 by fasteners 50, forming a stable grid structure. The disc-lock scaffolding also includes vertical diagonal bracing 60 set on its outer side, and horizontal scissor bracing 70 set at the bottom and / or top of the scaffolding.

[0020] Specifically, the disc-lock scaffolding serves as the modular support core of the entire system. Its basic structure consists of disc-lock uprights 40 and horizontal bars connected by efficient fasteners 50, forming a stable and reliable three-dimensional grid load-bearing structure that directly bears the upper formwork system and construction loads. To significantly enhance the overall stability of this core structure, vertical diagonal braces 60 are specially installed on the outside of the scaffold. These braces effectively distribute and transfer the force on the outermost row of uprights to the inner scaffold through diagonal tension and compression, thereby greatly improving the overall anti-overturning capacity and out-of-plane stability of the scaffold. At the same time, horizontal scissor braces 70 are continuously arranged at the bottom and top of the scaffold. By forming a cross truss structure in the horizontal plane, they provide strong horizontal stiffness to the system, effectively resisting horizontal forces such as wind loads and construction dynamic loads, and preventing the scaffold from torsional deformation or instability.

[0021] It also includes a triangular disc-lock scaffold 80, which is installed on the outside of the disc-lock scaffold and rigidly connected to the main structure. Utilizing the principle of triangle stability, the cantilevered scaffold provides a sturdy "base," effectively reducing the calculated length of the cantilever section. It also serves as the foundation for the first layer of protective scaffolding and provides a reliable rigid connection point between the scaffold and the main building structure, directly transferring the horizontal load of the scaffold to the main structure and further ensuring safety.

[0022] It also includes perforated metal mesh 90 installed on the construction layer and stamped steel scaffold boards 110 laid on the working layer. Among them, the perforated metal mesh 90 is installed on the edge of the construction layer as a facade protection. Compared with traditional dense mesh safety nets, the perforated metal mesh 90 is a rigid structure with high strength, fire resistance, and good durability, which can more effectively prevent personnel and materials from falling.

[0023] This case also includes the installation and erection steps of the steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system. S1. Precisely embed the bottom wall-mounted embedded part of the Y-shaped lower support component 10 to the side of the outer ring structural beam of the N-1 floor (i.e., the floor below the cantilever floor), ensuring that the precast steel bars of the embedded part are tied or welded to the steel bars of the structural beam to form a tight connection; at the same time, strengthen the bottom reinforcement of the structural beam of the N-1 floor to bear the concentrated load from the lower support, and the bottom formwork support frame of the outer ring beam of the N-1 and N-2 floors should be retained as a safety backfilling measure during construction; S2. Connect the Y-shaped lower support component 10 and the cantilever main beam 20 on the ground to form an integral "L" or "seven" shaped rigid frame. Use tower cranes or other equipment to hoist the assembled rigid frame to the designed position on the Nth floor (cantilever working floor). Then adjust the verticality and horizontal position of the rigid frame and firmly connect the anchor plate 104 at the bottom of the Y-shaped lower support component to the wall attachment component pre-embedded on the N-1 floor (e.g., use high-strength bolts for fastening). S3. Install I-beam connecting beams 30 on the adjacent cantilever main beams 20 on the Nth floor. Use U-shaped steel clamps to fix them to the main beams and diagonally connect them with the adjacent units to form a stable spatial frame. Set positioning piles (or positioning steel bar heads) on the cantilever main beams 20 and I-beam connecting beams 30 as the base of the disc buckle uprights 40 to achieve precise positioning and anti-slip of the uprights. Starting from the positioning point, erect disc buckle scaffolding, install disc buckle uprights 40, horizontal bars and fasteners 50 to form a core support grid. Then, install vertical diagonal braces 60 and horizontal scissor braces 70 simultaneously to enhance the overall stability of the frame. S4. Install a triangular protective frame: On the outside of the cantilever slab of the N+1 floor, erect a triangular disc-buckle frame 80 and rigidly connect it to the main structure. Extend the uprights upward from the triangular frame to form a single row of protective frames for the construction layer, and hang perforated mesh 90 on the outside of the frame. Finally, lay stamped steel scaffold boards 110 on the working layer as the ultimate safety guarantee.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A steel Y-shaped under-braced cantilevered formwork disc-lock scaffolding system, characterized in that, include The cantilevered main beam (20) is used to anchor to the main structure and serve as the main horizontal load-bearing component; Y-shaped lower support member (10) is set below the cantilever main beam (20), with its upper end connected to the cantilever main beam (20) and its lower end anchored to the lower main structure, for transferring the load to the lower structure; I-beam connecting beams (30) are set on the cantilever main beams (20) and connect adjacent cantilever main beams (20) into a whole; The disc-lock scaffolding is erected on the cantilever main beam (20) and / or the I-beam connecting beam (30) to support the formwork system; The Y-shaped lower support component (10) includes a lower support main rod (100) and two support rods (102) that are forked at the top of the lower support main rod (100) to form a Y-shaped branch structure; the angle of the support rod (102) is 45°. The bottom of the Y-shaped lower support member (10) is provided with an anchor plate (104) for anchoring to the lower main structure, and the lower support main rod (100) and the support rod (102) are fixedly connected by a connecting plate (106).

2. The steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system according to claim 1, characterized in that, The cantilever main beam (20) is double-anchored by U-bolts and pressure plates, and the bottom of the disc buckle uprights (40) of the disc buckle scaffold is connected to the cantilever main beam (20) by positioning steel bar heads.

3. The steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system according to claim 1, characterized in that, The I-beam connecting beam (30) is fixedly connected to the cantilever main beam (20) by U-shaped clamps.

4. The steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system according to claim 1, characterized in that, The disc-lock scaffolding includes multiple disc-lock uprights (40) and horizontal bars fixed to the disc-lock uprights (40) by fasteners (50), forming a stable grid structure.

5. The steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system according to claim 1, characterized in that, The disc-lock scaffold also includes vertical diagonal bracing (60) on its outer side, and horizontal scissor bracing (70) on the bottom and / or top of the scaffold.

6. The steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system according to claim 1, characterized in that, It also includes a triangular disc buckle frame (80), which is disposed on the outside of the disc buckle scaffold and rigidly connected to the main structure.

7. The steel Y-shaped under-braced cantilever formwork disc-lock scaffolding system according to claim 1, characterized in that, It also includes perforated mesh (90) installed on the construction layer and stamped steel scaffold boards (110) laid on the working layer.

Images