Arc-shaped structure gutter formwork reinforcing tool

Abstract

The utility model relates to drainage tool technical field, concretely to arc structure drainage ditch formwork reinforcing tool, including the formwork of symmetrical setting in the two sides of drainage ditch wall, four vertical steel pipes of symmetrical fixed formwork outside, the crossbeam steel pipe of crosslying in four vertical steel pipe top, the steel bar inclined brace of connection in vertical steel pipe and crossbeam steel pipe, the triangular support frame of even distribution symmetry welding on crossbeam steel pipe, the buckle and wooden frame for reinforcing overall stability and the bedding concrete of setting in formwork below, four vertical steel pipes and crossbeam steel pipe weld and form the portal frame structure, and the steel bar inclined brace and portal frame structure weld and constitute triangular support system. In this arc structure drainage ditch formwork reinforcing tool, through four vertical steel pipe and crossbeam steel pipe weld and form the portal frame, cooperate the triangular support system of steel bar inclined brace constitution, utilize the inherent stability principle of triangular structure, even transmission formwork side pressure to overall support framework.

Description

Technical Field

[0001] This utility model relates to the field of drainage tool technology, specifically to a tool for reinforcing an arc-shaped drainage ditch template. Background Technology

[0002] In infrastructure construction such as municipal engineering, highway construction, and water conservancy projects, drainage ditches, as core drainage structures, directly affect the overall service life and safety of the project due to their construction quality. Traditional drainage ditches mostly adopt straight or trapezoidal cross-section designs, and the corresponding formwork reinforcement technology has become mature. They are commonly fixed by tie rods, ordinary steel pipe supports, etc., which can basically meet the needs of conventional construction.

[0003] With the increasing demands for structural functionality and aesthetic appeal in engineering construction, curved cross-section drainage ditches have become widely used in urban landscape projects, coastal protection projects, and drainage projects in complex terrains due to their advantages such as lower flow resistance, more rational stress distribution, and better visual effects. However, existing formwork reinforcement technologies are ill-suited to the construction requirements of curved structures, gradually revealing several prominent problems: Traditional reinforcement devices are mostly designed for straight or trapezoidal cross sections. The poor fit between the support structure and the curved template can easily lead to insufficient positioning accuracy of the template, resulting in inconsistent curvature of the drainage ditch and poor surface flatness, which affects drainage efficiency and structural aesthetics.

[0004] Existing reinforcement methods lack modular and standardized design, have complicated disassembly and assembly processes, require a lot of manpower and time, and have long construction cycles, making them difficult to adapt to the needs of efficient construction.

[0005] Traditional tie rod reinforcement methods require through holes to be made in the formwork. After the concrete is poured, leakage is likely to occur at the holes. Later repairs not only increase construction costs but may also affect the stability of the drainage ditch structure. At the same time, some reinforcement methods have insufficient overall rigidity, and the formwork is prone to running away or bulging during the pouring process, which further aggravates the construction quality risks.

[0006] Traditional reinforcement tools are mostly designed for single use or with low turnover, resulting in serious waste of materials such as wood and steel, which does not conform to the industry development trend of green construction and energy conservation and environmental protection. Utility Model Content

[0007] The purpose of this utility model is to provide a tool for reinforcing arc-shaped drainage ditch templates, in order to solve the problems mentioned in the background art. Traditional reinforcement devices are mostly designed for straight or trapezoidal cross-sections, resulting in poor fit between the support structure and the arc-shaped template, which easily leads to insufficient template positioning accuracy, ultimately causing inconsistent curvature of the drainage ditch, poor surface flatness, and affecting drainage efficiency and structural aesthetics.

[0008] To achieve the above objectives, this utility model provides a tool for reinforcing arc-shaped drainage ditch templates, comprising templates symmetrically arranged on both sides of the drainage ditch wall, four vertical steel pipes symmetrically fixed to the outside of the templates, a horizontal beam steel pipe placed at the top of the four vertical steel pipes, steel reinforcement braces connecting the vertical steel pipes and the horizontal beam steel pipes, a triangular support frame evenly distributed and symmetrically welded to the horizontal beam steel pipes, clips and wooden beams for enhancing overall stability, and a concrete pad layer placed below the templates; the four vertical steel pipes and the horizontal beam steel pipes are welded to form a portal frame structure, the steel reinforcement braces are welded to the portal frame structure to form a triangular support system, the wooden beams are arranged close to the outside of the templates, and one end of the clips presses against the wooden beams and the other end hooks into the concrete pad layer to achieve overall fixation.

[0009] This setup utilizes a portal frame formed by welding four vertical steel pipes and horizontal steel pipes, combined with a triangular support system composed of steel reinforcement braces. By leveraging the inherent stability principle of a triangular structure, the lateral pressure of the formwork is evenly transferred to the overall support skeleton, significantly improving the overall rigidity and lateral pressure resistance of the reinforcement system. This effectively resists the lateral thrust generated during concrete pouring, fundamentally solving the problems of formwork displacement and bulging that are prone to occur in traditional reinforcement methods, and ensuring that the formwork remains stable and does not deform under construction loads.

[0010] The templates are symmetrically set on both sides of the ditch wall. The wooden beams arranged on the outer side can fully fit with the curved templates. With the symmetrical positioning effect of the portal frame, the templates always keep the curvature of the drainage ditch design section consistent. This avoids the curvature deviation and uneven surface problems caused by the poor fit between the traditional support and the curved template. It ensures that the drainage ditch has regular cross-sectional dimensions, uniform curvature, and a smooth surface after pouring, which not only improves drainage efficiency but also optimizes the structural appearance quality.

[0011] Preferably, the template is made of 15mm thick plywood, the outer surface of the template is treated with waterproof and anti-corrosion, and the arc-shaped contour is adapted to the curvature of the drainage ditch design section.

[0012] This setup utilizes 15mm thick plywood formwork, whose strength and rigidity are perfectly suited to the stress requirements of the curved drainage ditch formwork. It effectively resists lateral pressure during concrete pouring, preventing localized depressions and deformations caused by insufficient thickness, and further ensuring the integrity of the curved shape. The waterproof and anti-corrosion treatment on the outer surface of the formwork reduces the erosion of the formwork by moisture and concrete slurry during construction, preventing mold and decay, significantly increasing the number of reuses, aligning with green construction principles, and reducing material replacement costs. The curved contour of the formwork precisely matches the curvature of the drainage ditch design, solving the problem of poor fit between traditional general-purpose formwork and curved structures. This ensures a perfect match between the formwork and the drainage ditch design shape, resulting in a uniform curvature and smooth surface after pouring, improving drainage flow and optimizing the structural appearance.

[0013] Preferably, the vertical steel pipe and the horizontal beam steel pipe are both φ48×3.0mm, the steel reinforcement bracing is HRB500φ18mm threaded steel bar, and the foundation concrete is C20 concrete with a thickness of 100mm.

[0014] This setup uses φ48×3.0mm steel pipes (a common standard specification for municipal engineering) and HRB500φ18mm threaded steel bars (high-strength earthquake-resistant steel bars). The materials are easy to procure and process, eliminating the need for custom-made special-specification components and reducing the difficulty of construction preparation. At the same time, standardized materials facilitate on-site splicing and replacement, improving construction efficiency.

[0015] Preferably, the bottom end of the vertical steel pipe is inserted into the positioning reinforcement in the foundation concrete, and the horizontal beam steel pipe and the vertical steel pipe are connected by full welding, with continuous and uniform welds.

[0016] This feature involves inserting the bottom end of the vertical steel pipe into the positioning reinforcement bar in the foundation concrete to form an "embedded" fixation. This effectively limits the horizontal displacement and vertical sway of the steel pipe, ensuring that the four vertical steel pipes always maintain a symmetrical and vertical state, and providing a precise vertical positioning benchmark for the portal frame.

[0017] Preferably, the steel reinforcement bracing includes an inner bracing and an outer bracing, with the inner bracing located on the inner side of the vertical steel pipe and the outer bracing located on the outer side of the vertical steel pipe.

[0018] This system of steel reinforcement bracing consists of internal bracing (inner side of the vertical pipe) and external bracing (outer side of the vertical pipe), forming a two-way constraint system of "inner pushing + outer pulling". Compared with traditional single-sided bracing, it can more comprehensively disperse the lateral pressure transmitted by the formwork, avoid tilting and torsion of the vertical steel pipe due to unilateral force, and further improve the lateral pressure resistance of the support system.

[0019] Preferably, the template is filled with reinforced concrete.

[0020] This setting clearly defines the core application scenario of the reinforcement tool by specifying the pouring of reinforced concrete within the template. It indicates that the tool is specifically designed for the construction of curved drainage ditches in reinforced concrete structures, and is compatible with the pouring process of reinforced concrete (such as vibration and curing), thus avoiding the problem of incompatibility between the tool and construction materials.

[0021] Preferably, the buckle includes a vertical rod and a pressure plate, the lower end of the vertical rod is fixed by a concrete pad, and the upper end of the vertical rod is pressed against the upper surface of the timber by the pressure plate.

[0022] This buckle uses a combination structure of "vertical rod + pressure plate". The lower end of the vertical rod is fixed to the concrete foundation to form a stable support point. The upper end is directly pressed onto the timber by the pressure plate, realizing two-way fixing of "lower anchoring + upper compaction". This can effectively prevent the timber from shifting or loosening, ensure that the timber and the formwork are tightly fitted, and further prevent local bulging and deformation of the formwork.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: In this arc-shaped drainage ditch formwork reinforcement tool, a portal frame formed by welding four vertical steel pipes and horizontal steel pipes, combined with a triangular support system composed of steel reinforcement diagonal braces, utilizes the inherent stability principle of the triangular structure to evenly transfer the lateral pressure of the formwork to the overall support skeleton. This significantly improves the overall stiffness and lateral pressure resistance of the reinforcement system, effectively resisting the lateral thrust generated during concrete pouring. It fundamentally solves the problems of formwork running and bulging that are prone to occur in traditional reinforcement methods, ensuring that the formwork remains stable and does not deform under construction loads.

[0024] The templates are symmetrically set on both sides of the ditch wall. The wooden beams arranged on the outer side can fully fit with the curved templates. With the symmetrical positioning effect of the portal frame, the templates always keep the curvature of the drainage ditch design section consistent. This avoids the curvature deviation and uneven surface problems caused by the poor fit between the traditional support and the curved template. It ensures that the drainage ditch has regular cross-sectional dimensions, uniform curvature, and a smooth surface after pouring, which not only improves drainage efficiency but also optimizes the structural appearance quality.

[0025] The innovative method of using a snap-fit ​​system, where one end is pressed against the wooden beam and the other end is hooked to the concrete subbase, eliminates the need for through holes in the formwork. This completely avoids the drawbacks of traditional tie rod reinforcement methods, preventing leakage risks caused by inadequate hole sealing from the source. At the same time, it ensures the integrity of the concrete structure, improves the self-waterproofing performance and long-term stability of the drainage ditch, and reduces later repair costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the present invention; The meanings of the labels in the diagram are as follows: 1. Horizontal steel pipe; 2. Vertical steel pipe; 3. Reinforcing bar bracing; 31. Internal bracing; 32. External bracing; 4. Triangular support frame; 5. Formwork; 6. Reinforced concrete; 7. Subbase concrete; 8. Clip; 81. Vertical bar; 82. Pressure plate; 9. Timber. Detailed Implementation

[0027] 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.

[0028] This utility model provides a tool for reinforcing arc-shaped drainage ditch templates, such as... Figures 1-3 As shown, the structure includes templates 5 symmetrically arranged on both sides of the drainage ditch wall, four vertical steel pipes 2 symmetrically fixed to the outside of templates 5, a horizontal beam steel pipe 1 placed at the top of the four vertical steel pipes, steel reinforcement braces 3 connecting the vertical steel pipes 2 and the horizontal beam steel pipe 1, triangular support frames 4 evenly distributed and symmetrically welded to the horizontal beam steel pipe 1, clips 8 and timber 9 for enhancing overall stability, and a concrete cushion layer 7 placed below templates 5; the four vertical steel pipes 2 and the horizontal beam steel pipe 1 are welded to form a portal frame structure, the steel reinforcement braces 3 are welded to the portal frame structure to form a triangular support system, the timber 9 is arranged close to the outside of templates 5, and one end of the clips 8 is pressed against the timber 9 and the other end is hooked to the concrete cushion layer 7 to achieve overall fixation.

[0029] A collaborative force-bearing system of "portal frame + triangular support" is constructed. Leveraging the inherent stability of the triangular structure and the symmetrical load-bearing advantage of the portal frame, the lateral pressure of concrete pouring is evenly transferred to the overall support skeleton, fundamentally solving the problems of formwork displacement and bulging in curved formwork, ensuring the formwork remains stable and undeformed under construction loads. The symmetrical arrangement of the formwork and the design of the timber frame conforming to the curved contour force the formwork to precisely match the curvature of the drainage ditch's designed cross-section, avoiding curvature deviation and surface unevenness caused by poor fit in traditional supports, ensuring a regular cross-section and smooth surface of the drainage ditch after pouring. An innovative two-way fixing method of "pressed timber frame + hooked concrete subbase" eliminates the need for through holes in the formwork, completely eliminating the leakage risks associated with traditional tie rods, while ensuring the integrity of the concrete structure and improving the self-waterproofing performance of the drainage ditch. The modular component design simplifies the assembly and disassembly process, requiring only key steps such as welding and locking, enabling rapid formwork turnover, significantly shortening the construction cycle, and adapting to the needs of high-efficiency construction.

[0030] In this embodiment, template 5 is a 15mm thick plywood template. The outer surface of template 5 is treated with waterproofing and anti-corrosion, and its arc-shaped contour matches the curvature of the drainage ditch design section. The specifications of the vertical steel pipe 2 and the horizontal beam steel pipe 1 are both φ48×3.0mm. The reinforcing bar bracing 3 uses HRB500 φ18mm threaded steel bars. The foundation concrete 7 is C20 concrete with a thickness of 100mm. The bottom end of the vertical steel pipe 2 is inserted into the positioning reinforcing bars within the foundation concrete 7. The horizontal beam steel pipe 1 and the vertical steel pipe 2 are connected by full welding, with continuous and uniform welds. The reinforcing bar bracing 3 includes an inner bracing 31 and an outer bracing 32. The inner bracing 31 is located on the inner side of the vertical steel pipe 2, and the outer bracing 32 is located on the outer side of the vertical steel pipe 2. Reinforced concrete 6 is poured inside template 5.

[0031] The 15mm thick plywood formwork boasts strength and rigidity perfectly suited to the stress requirements of curved formwork. Its waterproof and corrosion-resistant outer surface reduces moisture and concrete slurry erosion, extending its lifespan. The curved contour precisely matches the design curvature, eliminating the need for on-site secondary processing and directly ensuring forming accuracy. φ48×3.0mm standard steel pipes and HRB500φ18mm high-strength threaded steel bars are selected, ensuring easy procurement and processing of materials and reducing construction preparation difficulty. The combined strength of these materials allows the support system's load-bearing capacity to precisely match the lateral pressure of the concrete, preventing support failure due to insufficient material strength. A C20 concrete base layer with a 100mm thick cushion layer forms a solid foundation, effectively distributing vertical loads and preventing foundation settlement. Vertical steel pipes are inserted into the cushion layer to position the reinforcing bars, achieving "embedded" fixation. Combined with the full-welded connection between the horizontal beams and vertical pipes, this strengthens the overall integrity and positioning accuracy of the portal frame, ensuring even load distribution, reducing the risk of breakage at weak points, and minimizing construction safety hazards. The bidirectional constraint design of the steel reinforcement diagonal bracing, combining internal support and external tension, is adapted to the diffused lateral pressure characteristics of the curved formwork. This prevents the vertical steel pipe from tilting or twisting due to unilateral stress, ensuring balanced stress distribution in the support system, reducing local stress concentration, and guaranteeing the regularity of the curved cross-section and the service life of the components. The precise matching of reinforcement tools and reinforced concrete pouring technology within the formwork creates a synergistic effect of "stable formwork → accurate forming → strong structure," enhancing the load-bearing capacity and long-term durability of the drainage ditch.

[0032] Furthermore, the buckle 8 includes a vertical rod 81 and a pressure plate 82. The lower end of the vertical rod 81 is fixed by the foundation concrete 7, and the upper end of the vertical rod 81 is pressed against the upper surface of the timber 9 by the pressure plate 82.

[0033] The combined structure of "vertical rod anchoring + pressure plate compaction" features a vertical rod fixed at the lower end to the concrete subbase, forming a stable support point. The upper end is tightly pressed against the timber by a pressure plate, achieving bidirectional fixation. This effectively restricts timber displacement and loosening, ensuring a tight fit between the timber and the formwork, preventing localized bulging and deformation. The pressure plate increases the contact area between the clips and the timber, converting concentrated pressure into surface pressure, preventing excessive localized pressure that could damage the timber or dent the formwork. This extends the number of times the timber and formwork can be reused, reducing material waste. The simple "vertical rod + pressure plate" design simplifies the locking and unlocking of the clips, making assembly and disassembly more convenient than traditional fixing methods, reducing manpower and working time, and further improving construction efficiency.

[0034] Before using the arc-shaped drainage ditch formwork reinforcement tool of this utility model, material preparation should be completed to ensure that the following components are complete: formwork 5 (15mm thick plywood formwork, with an arc contour adapted to the design curvature and treated for waterproofing and corrosion prevention), vertical steel pipes 2 and horizontal steel pipes 1 with specifications of φ48×3.0mm, HRB500 φ18mm threaded steel bars (used to make steel bar braces 3), clips 8, and timber 9, and that the raw materials for the foundation concrete 7 (C20 strength grade) are in place. Subsequently, a 100mm thick C20 foundation concrete 7 is poured at the bottom of the drainage ditch. During the pouring process, positioning steel bars are pre-embedded simultaneously. After the foundation concrete reaches the design strength, a flat and solid construction foundation is formed, providing a guarantee for the positioning of the subsequent support system.

[0035] Based on the design cross-sectional dimensions and curvature requirements of the arc-shaped drainage ditch, two templates 5 are symmetrically arranged on both sides of the drainage ditch wall at the designed positions to ensure that the inner arc contour of the template is completely in line with the design curvature of the drainage ditch cross-section, and that the templates on both sides remain symmetrical and parallel, providing a precise forming space for concrete pouring.

[0036] Four vertical steel pipes 2 are symmetrically placed on the outside of the template 5. The bottom end of each vertical steel pipe 2 is inserted into the positioning steel bars pre-embedded in the foundation concrete 7 to achieve vertical positioning and fixation. Then, the horizontal beam steel pipe 1 is placed horizontally on top of the four vertical steel pipes 2, and the horizontal beam steel pipe 1 is connected to the vertical steel pipes 2 by full welding. The weld is continuous and uniform, forming a stable portal frame structure. Next, the steel reinforcement diagonal braces 3 (divided into inner braces 31 and outer braces 32) are welded to the inner and outer sides of the vertical steel pipes 2 respectively, and both ends are fully welded to the vertical steel pipes 2 and the horizontal beam steel pipes 1 to form an overall load-bearing system of "portal frame + triangular support". At the same time, triangular support frames 4 are symmetrically welded evenly on the horizontal beam steel pipes 1 to further enhance the top stability and deformation resistance of the portal frame.

[0037] The timber 9 is arranged to fit snugly along the outer arc contour of the template 5, ensuring full contact between the timber 9 and the template 5 to distribute and transfer lateral pressure. Then, the clips 8 are installed, fixing the lower end of the vertical rod 81 of the clip 8 into the concrete foundation 7, while the upper end is tightly pressed against the upper surface of the timber 9 by the pressure plate 82, forming a two-way fixing of "lower anchoring + upper compaction." This ensures that the timber 9 is tightly fitted with the template 5 and the vertical steel pipe 2, preventing timber displacement and template loosening during construction.

[0038] After the entire reinforcement system is installed and inspected and approved, reinforced concrete 6 is poured into the forming space enclosed by the formwork 5. During the pouring process, the lateral pressure of the concrete on the formwork 5 is transmitted to the vertical steel pipe 2 through the wooden beams 9, and then evenly distributed to the foundation concrete 7 through the steel reinforcement braces 3 and the portal frame. The triangular support system and the two-way buckle fixation work together to resist the lateral pressure, ensuring that the formwork 5 does not move or expand, and maintaining the accuracy of the arc contour.

[0039] After the reinforced concrete 6 reaches the designed demolding strength, dismantle it in the order of "easy first, difficult later": first loosen the pressure plate 82 of the clip 8 and remove the wooden beam 9; then cut or remove the welding points between the steel reinforcement diagonal brace 3 and the triangular support frame 4; then dismantle the horizontal steel pipe 1 and the vertical steel pipe 2; finally, remove the formwork 5 as a whole from the formed arc-shaped drainage ditch wall. After all components are cleaned and inspected (and repaired promptly if damaged), they can be transferred to the next arc-shaped drainage ditch construction site for reuse.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tool for reinforcing arc-shaped drainage ditch templates, characterized in that: The system includes templates (5) symmetrically arranged on both sides of the drainage ditch wall, four vertical steel pipes (2) symmetrically fixed to the outside of the templates (5), a horizontal beam steel pipe (1) placed at the top of the four vertical steel pipes, steel reinforcement braces (3) connecting the vertical steel pipes (2) and the horizontal beam steel pipes (1), a triangular support frame (4) evenly distributed and symmetrically welded to the horizontal beam steel pipes (1), buckles (8) and timber (9) for strengthening overall stability, and a concrete cushion layer (7) set below the templates (5); the four vertical steel pipes (2) and the horizontal beam steel pipes (1) are welded to form a portal frame structure, the steel reinforcement braces (3) are welded to the portal frame structure to form a triangular support system, the timber (9) is arranged close to the outside of the templates (5), and one end of the buckle (8) is pressed against the timber (9) and the other end is hooked to the concrete cushion layer (7) to achieve overall fixation.

2. The arc-shaped drainage ditch template reinforcement tool according to claim 1, characterized in that: The template (5) is made of 15mm thick plywood. The outer surface of the template (5) is treated with waterproof and anti-corrosion, and the arc-shaped contour is compatible with the curvature of the drainage ditch design section.

3. The arc-shaped drainage ditch template reinforcement tool according to claim 1, characterized in that: The specifications of the vertical steel pipe (2) and the horizontal steel pipe (1) are both φ48×3.0mm. The steel reinforcement brace (3) adopts HRB500φ18mm threaded steel bar. The cushion concrete (7) is C20 concrete with a thickness of 100mm.

4. The arc-shaped drainage ditch template reinforcement tool according to claim 1, characterized in that: The bottom end of the vertical steel pipe (2) is inserted into the positioning reinforcement in the cushion concrete (7), and the horizontal beam steel pipe (1) and the vertical steel pipe (2) are connected by full welding, with continuous and uniform welds.

5. The arc-shaped drainage ditch template reinforcement tool according to claim 1, characterized in that: The steel reinforcement brace (3) includes an inner brace (31) and an outer brace (32). The inner brace (31) is located on the inner side of the vertical steel pipe (2), and the outer brace (32) is located on the outer side of the vertical steel pipe (2).

6. The arc-shaped drainage ditch template reinforcement tool according to claim 1, characterized in that: The template (5) is filled with reinforced concrete (6).

7. The arc-shaped drainage ditch template reinforcement tool according to claim 1, characterized in that: The buckle (8) includes a vertical rod (81) and a pressure plate (82). The lower end of the vertical rod (81) is fixed by a foundation concrete (7), and the upper end of the vertical rod (81) is pressed against the upper surface of the timber (9) by the pressure plate (82).

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