Basement outer wall single-side formwork supporting main keel reinforcing piece structure
By combining a fixed truss, main keel, locking shaft, and reinforcing bracket, the problem of reinforcing the main keel in single-sided formwork of basement exterior walls is solved, achieving efficient and economical reinforcement and improving construction safety and efficiency.
Patent Information
- Application Number
- CN202423202368.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In deep foundation pit projects located near rivers or in complex geological conditions, the reinforcement requirements for the main keel are high during the construction of single-sided formwork for the exterior walls of basements. Existing reinforcement measures are not ideal, have high construction complexity, consume a lot of materials, and pose safety risks.
The system adopts a combination structure of fixed truss, main keel, locking shaft, fixed pad and reinforcing plate. The main keel is fixed to the fixed truss by locking shaft and the bottom of the main keel is supported by reinforcing plate to improve stability and load-bearing capacity.
It significantly improves the stability and load-bearing capacity of single-sided formwork construction, reduces construction complexity, safety risks and material consumption, improves construction efficiency and reduces costs.
Smart Images

Figure CN223838580U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of exterior wall structure construction, specifically a single-sided formwork main keel reinforcement structure for basement exterior walls. Background Technology
[0002] In deep foundation pit projects located near rivers or in other complex geological conditions, the construction of basement exterior walls is often constrained by various factors, especially the presence of internal support structures, which poses a significant challenge to the erection and reinforcement of exterior wall formwork. Traditional construction methods often employ double-sided formwork reinforcement, but this method is difficult to implement in confined spaces (such as areas adjacent to internal supports), and it is also costly and time-consuming.
[0003] To overcome these challenges, the single-sided formwork construction technique emerged. Single-sided formwork involves erecting formwork on only one side of the exterior wall and employing specific reinforcement measures to ensure its stability and load-bearing capacity. However, the single-sided formwork system places extremely high demands on the reinforcement of the main joists, because instability in the main joists will directly affect the construction quality of the exterior wall, increase the risk of water seepage, and may even lead to safety accidents.
[0004] In current single-sided formwork construction, although some reinforcement measures exist, they often suffer from unsatisfactory reinforcement effects, high construction complexity, and large material consumption. Therefore, it is necessary to develop an efficient and economical main keel reinforcement structure for single-sided formwork of basement exterior walls to meet the needs of single-sided formwork construction. Utility Model Content
[0005] In view of this, the present invention provides a single-sided formwork main keel reinforcement structure for basement exterior walls, including a fixed truss, a main keel, a locking shaft, a fixed pad, and a reinforcement support plate.
[0006] The locking shaft passes through the fixed truss, the fixed pad and the reinforcing support plate are located on both sides of the fixed truss, and one end of the locking shaft presses the fixed pad onto the fixed truss;
[0007] The reinforcing support plate includes a clamping plate and a bottom support plate, wherein the bottom support plate is vertically connected to the bottom of the clamping plate;
[0008] The main keel is located between the clamping plate and the fixed truss. The end of the locking shaft away from the fixed pad presses the main keel onto the fixed truss. The bottom support plate supports the bottom of the main keel.
[0009] Furthermore, the main keel includes an upper keel plate and a lower keel plate, which are located above and below the locking shaft, respectively.
[0010] Furthermore, both the upper and lower keel plates are square steel pipes.
[0011] Furthermore, both the upper keel plate and the lower keel plate have rectangular cross-sections.
[0012] Furthermore, the bottom support bears and supports the lower surface of the lower keel plate.
[0013] Furthermore, the locking shaft is a fastening bolt, one end of the locking shaft is provided with a fastening nut, and the locking shaft is threadedly connected to a fastening nut. The two ends of the locking shaft pass through the pressure plate and the fixing pad respectively. The fastening nut presses against the fixing pad, and the fastening nut presses against the pressure plate.
[0014] Furthermore, the fixed truss is a double-channel steel.
[0015] Furthermore, the upper keel plate and the lower keel plate are parallel, and the keel plate and the lower keel plate are symmetrically arranged relative to the locking axis.
[0016] Furthermore, the clamping plate and the bottom plate of the reinforcing support plate are an integrated structure.
[0017] Furthermore, the reinforcing support plate is formed by bending at the connection between the pressure plate and the bottom support plate.
[0018] The beneficial effects of this utility model's single-sided formwork main keel reinforcement structure for basement exterior walls are as follows: This single-sided formwork main keel reinforcement structure includes a fixed truss, a main keel, a locking shaft, a fixed pad, and a reinforcing bracket. The locking shaft passes through the fixed truss, and one end of the locking shaft presses the fixed pad onto the fixed truss. The other end of the locking shaft fixes the main keel to the fixed truss via the reinforcing bracket. The reinforcing bracket includes a pressure plate and a bottom support plate. The bottom support plate supports the bottom of the main keel, effectively preventing the main keel from slipping down, and significantly improving the stability and load-bearing capacity of the main keel. Furthermore, this single-sided formwork main keel reinforcement structure is simple and easy to install. Its reinforcing bracket is made of high-strength steel, which effectively reduces safety risks, construction complexity, and construction costs during construction, reduces material consumption, and improves construction efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the installation structure of a single-sided formwork main keel reinforcement structure for a basement exterior wall according to an embodiment of this utility model.
[0020] In the above diagram: 1-Fixed truss, 2-Main keel, 3-External wall formwork, 4-Fasting bolt, 41-Fasting nut, 42-Fasting nut, 5-Fixed pad, 6-Reinforcing support plate, 61-Pressure plate, 62-Bottom support plate. Detailed Implementation
[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0022] Please refer to Figure 1 The present invention relates to a single-sided formwork main keel reinforcement structure for basement exterior walls, comprising a fixed truss 1, a main keel 2, a locking shaft, a fixed pad 5, and a reinforcement support plate 6.
[0023] In this embodiment, the fixed truss 1 is part of a triangular truss, which serves as the main supporting structure of the single-sided formwork system. The fixed truss 1 is a vertically arranged double-channel steel. Both ends of the locking shaft pass through the fixed truss 1. The fixing pad 5 and the reinforcing support plate 6 are located on both sides of the fixed truss 1, and one end of the locking shaft presses the fixing pad 5 onto the fixed truss 1.
[0024] The reinforcing support plate 6 includes a clamping plate 61 and a bottom support plate 62. The bottom support plate 62 is vertically connected to the bottom of the clamping plate 61, so that the side of the reinforcing support plate 6 is L-shaped.
[0025] The main keel 2 is located between the clamping plate 61 and the fixed truss 1. The end of the locking shaft away from the fixed pad 5 presses the main keel 2 onto the fixed truss 1. This allows the fixed pad 5 and the clamping plate 61 to be clamped and fixed onto the fixed truss 1 from both sides, and the clamping plate 61 uses clamping force to press and fix the main keel 2 onto the fixed truss 1. Furthermore, the bottom support plate 62 supports the bottom of the main keel 2, preventing it from slipping. The bottom support plate 62 significantly improves the stability and load-bearing capacity of the main keel installation. The exterior wall formwork 3 (used for single-sided exterior wall formwork construction) is supported on the main keel 2. This structure ensures the safety and construction quality of single-sided exterior wall formwork construction.
[0026] In a preferred embodiment, the main keel 2 includes an upper keel plate and a lower keel plate, which are located above and below the locking shaft, respectively. Both the upper and lower keel plates are square steel tubes with rectangular cross-sections. The bottom support bears and supports the lower surface of the lower keel plate. The upper and lower keel plates are parallel and symmetrically arranged relative to the locking shaft. The double-keel plate structure of the main keel 2 further improves its load-bearing capacity against the external wall formwork 3 and facilitates the fixing of the external wall formwork 3.
[0027] In a preferred embodiment, the locking shaft is a fastening bolt 4, with a fastening nut 41 at one end and a fastening nut 42 threadedly connected to it. Both ends of the locking shaft pass through a pressure plate 61 and a fixing pad 5, respectively. The fastening nut 41 presses against the fixing pad 5, and the fastening nut 42 presses against the pressure plate 61. This connection structure of the fastening bolt 4 ensures that the fixing pad 5 and the reinforcing support plate 6 are securely and reliably installed, preventing loosening.
[0028] In a preferred embodiment, the clamping plate 61 and the bottom support plate 62 of the reinforcing support plate 6 are an integrated structure. The reinforcing support plate 6 is made of high-strength steel and is formed by bending at the connection between the clamping plate 61 and the bottom support plate 62. The integrated structure of the reinforcing support plate 6 can ensure the supporting capacity of the bottom support plate 62 for the lower keel plate.
[0029] The reinforcement structure of this invention is simple and easy to install, significantly improving the stability and load-bearing capacity of a single-sided formwork system for basement exterior walls. By using reinforcement components made of high-strength steel, safety risks during construction are effectively reduced. The reinforcement structure of this invention also reduces construction complexity, material consumption, and construction efficiency, thereby lowering construction costs.
[0030] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.
[0031] Where there is no conflict, the above embodiments and features described herein can be combined with each other.
[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A single-sided formwork main keel reinforcement structure for basement exterior walls, characterized in that, Includes fixed trusses, main keel, locking shafts, fixed pads, and reinforcing brackets; The locking shaft passes through the fixed truss, the fixed pad and the reinforcing support plate are located on both sides of the fixed truss, and one end of the locking shaft presses the fixed pad onto the fixed truss; The reinforcing support plate includes a clamping plate and a bottom support plate, wherein the bottom support plate is vertically connected to the bottom of the clamping plate; The main keel is located between the clamping plate and the fixed truss. The end of the locking shaft away from the fixed pad presses the main keel onto the fixed truss. The bottom support plate supports the bottom of the main keel.
2. The single-sided formwork main keel reinforcement structure for basement exterior walls according to claim 1, characterized in that, The main keel includes an upper keel plate and a lower keel plate, which are located above and below the locking shaft, respectively.
3. The basement exterior wall single-sided formwork main keel reinforcement structure according to claim 2, characterized in that, Both the upper and lower keel plates are made of square steel pipes.
4. The single-sided formwork main keel reinforcement structure for basement exterior walls according to claim 2, characterized in that, Both the upper and lower keel plates have rectangular cross-sections.
5. The single-sided formwork main keel reinforcement structure for basement exterior walls according to claim 3, characterized in that, The bottom support plate bears and supports the lower surface of the lower keel plate.
6. The single-sided formwork main keel reinforcement structure for basement exterior walls according to claim 1, characterized in that, The locking shaft is a fastening bolt, with a fastening nut at one end and a fastening nut threaded onto it. Both ends of the locking shaft pass through a pressure plate and a fixing pad, respectively. The fastening nut presses against the fixing pad, and the fastening nut presses against the pressure plate.
7. The single-sided formwork main keel reinforcement structure for basement exterior walls according to claim 1, characterized in that, The fixed truss is made of double-channel steel.
8. The single-sided formwork main keel reinforcement structure for basement exterior walls according to claim 3, characterized in that, The upper keel plate and the lower keel plate are parallel, and the keel plate and the lower keel plate are symmetrically arranged relative to the locking axis.
9. A single-sided formwork main keel reinforcement structure for a basement exterior wall according to claim 1, characterized in that, The clamping plate and the bottom plate of the reinforced support plate are an integrated structure.
10. A single-sided formwork main keel reinforcement structure for a basement exterior wall according to claim 9, characterized in that, The reinforced support plate is formed by bending at the connection between the pressure plate and the bottom support plate.