A reinforcing steel pre-bundling frame for box culvert prefabrication

Abstract

The utility model relates to box culvert prefabrication technical field especially relates to a kind of steel bar pre-bundling frame for box culvert prefabrication, it include: bottom plate, the upper surface of the bottom plate is fixed with pre-bundling frame main part;The pre-bundling frame main part includes: a plurality of first binding post and a plurality of second binding post, the first binding post and the second binding post are connected by a plurality of first connecting system, adjacent the first binding post and adjacent the second binding post are connected by second connecting system;Wherein, the first binding post is all located first virtual plane, and the second binding post is all located first virtual cambered surface.This steel bar pre-bundling frame, so that worker can directly bind according to predetermined structure, without again relying on personal experience manual adjustment steel bar position and angle, to greatly reduce the positioning time, significantly improve the overall bundling efficiency and the quality of steel skeleton that bundling comes out.

Description

Technical Field

[0001] This utility model relates to the field of box culvert prefabrication technology, and in particular to a steel bar pre-tying frame for box culvert prefabrication. Background Technology

[0002] Currently, precast box culverts are widely used in underground passages, drainage systems, and power utility tunnels due to their advantages of high construction efficiency and controllable quality. Traditional box culvert structures are mostly regular rectangular cross-sections, and their internal steel reinforcement cages typically need to be pre-tied on specialized steel reinforcement pre-tying frames before being hoisted into the formwork for concrete pouring. This method greatly improves production efficiency and ensures the standardization and quality stability of the steel reinforcement cage.

[0003] However, in certain special projects, such as the bottom of shield tunnels, the bottom of the intermediate precast box culvert also needs to be designed in an arc shape to accommodate the tunnel's curved structure. For example, Chinese invention patent CN102337907A discloses a construction method for an intermediate precast box culvert in a shield tunnel, wherein the intermediate precast box culvert consists of a flat top slab, flat sidewalls, and a standard curved bottom slab.

[0004] For non-rectangular box culverts, existing rebar pre-tying frames cannot be used directly. Currently, the pre-tying of rebar cages for such curved box culverts largely relies on manual positioning and tying. This method has the following obvious drawbacks: Inefficient: Operators must manually adjust the position and angle of the steel bars based on experience, which is time-consuming and labor-intensive.

[0005] Unstable quality: It is highly dependent on the individual skills and experience of construction workers. The quality of the steel reinforcement cages tied by different workers varies, making it difficult to achieve standardized and uniform production. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing pre-tying frames for box culverts, which are mostly designed for regular rectangular box culverts. When it is necessary to tie the curved steel reinforcement skeleton, the steel reinforcement positioning and angle adjustment rely on manual labor, resulting in low work efficiency and unstable quality. This invention provides a steel reinforcement pre-tying frame for box culvert prefabrication.

[0007] In a first aspect, the present invention provides a steel bar pre-tying frame for prefabrication of box culverts, comprising: a base plate, wherein the upper surface of the base plate is fixed with the pre-tying frame body; The pre-tied frame body includes: a plurality of first tying posts and a plurality of second tying posts, the first tying posts and the second tying posts being connected by a plurality of first connecting systems, and adjacent first tying posts and adjacent second tying posts being connected by second connecting systems; The first binding posts are all located on the first virtual plane, and the second binding posts are all located on the first virtual arc surface.

[0008] The pre-tying frame for precast box culverts provided by this utility model provides workers with clear rebar positioning points by setting the first tying column on a first virtual plane and the second tying column on a first virtual arc surface with the arc of the curved rebar skeleton to be tied. This allows workers to directly tie the rebar according to the predetermined structure without relying on personal experience to manually adjust the position and angle of the rebar, thereby greatly reducing positioning time and significantly improving the overall tying efficiency.

[0009] The pre-stitched structure ensures the dimensional accuracy of the steel reinforcement cage and the curvature of the curved parts, which can accurately match the box culvert formwork to be poured later, thus improving the quality of the tied steel reinforcement cage.

[0010] Preferably, the curvature of the first virtual arc surface is 30°~45°.

[0011] With this structural design, in underground engineering, the arc-shaped box culvert at the bottom of a shield tunnel typically needs to be closely fitted to the tunnel structure itself. The 30°~45° angle range covers the common design of most arc-shaped bottom sections of shield tunnels, enabling the pre-stitching frame for prefabricated box culverts provided by this invention to accurately match the needs of engineering projects, improving the adaptability and versatility of the pre-stitching frame.

[0012] Preferably, the system further includes a plurality of reinforcing bar positioning rods, which are arranged vertically on the first binding column. One end of each reinforcing bar positioning rod is fixedly connected to the first binding column, and the other end of each reinforcing bar positioning rod is cantilevered.

[0013] This structural design, with the rebar positioning rods arranged vertically on the first binding column, provides precise positioning points for the horizontal rebars, allowing workers to easily fix the rebars in the correct positions and ensuring the three-dimensional dimensional and shape accuracy of the entire rebar cage. Furthermore, in the rebar cage of precast box culverts, in addition to the main rebars, stirrups and distribution bars are typically required. These rebars need to form a stable whole with the main rebars. The cantilever design of the rebar positioning rods facilitates the positioning and binding of these auxiliary rebars. Workers can lean or hang these auxiliary rebars against the cantilevered positioning rods before binding them, simplifying the rebar binding process.

[0014] Preferably, the rebar positioning rod is also arranged vertically on the second binding column, one end of the rebar positioning rod is fixedly connected to the second binding column, and the other end of the rebar positioning rod is cantilevered.

[0015] With this structural setup, steel bar positioning rods are also arranged on the second binding column, making it easy for workers to fix the steel bars in the correct position, thereby ensuring the three-dimensional dimensional and shape accuracy of the entire steel bar skeleton.

[0016] Preferably, in the horizontal direction, adjacent steel bar positioning rods are located on the same horizontal plane.

[0017] With this structural setup, when all the positioning rods are on the same horizontal plane, workers no longer need to repeatedly measure or adjust the height of each rebar. They simply place and tie the rebars along the positioning rods, which greatly simplifies the tying process, reduces human error, and significantly improves work efficiency.

[0018] Preferably, the rebar positioning rods are evenly distributed vertically on the first binding post, and the rebar positioning rods are evenly distributed vertically on the second binding post.

[0019] This structural setup, by evenly distributing the positioning rods on the binding column, ensures consistent spacing between adjacent vertical reinforcing bars, thus improving the quality of reinforcing bar binding.

[0020] Preferably, the system further includes a plurality of diagonal braces, one end of which is fixedly connected to the first connecting system, and the other end of which is fixedly connected to the base plate. The diagonal braces are oblique to the first connecting system.

[0021] This structural design, with its diagonal bracing, effectively resists lateral thrust or impacts, such as those caused by hoisting reinforcing bars or collisions during worker operations, preventing lateral displacement or overturning of the pre-tied frame and ensuring stability and safety throughout the entire binding process.

[0022] Preferably, the adjacent diagonal braces have opposite tendencies.

[0023] This structural arrangement, with adjacent diagonal braces in opposite directions, creates a "V" or "X" shape in three-dimensional space. This alternating design allows the pre-stitched frame to simultaneously resist lateral forces from two opposite directions, such as forces from the first and second tying posts. One diagonal brace resists a leftward thrust, while the adjacent brace resists a rightward thrust. This ensures the pre-stitched frame maintains extremely high stability.

[0024] Preferably, the upper surface of the base plate is further fixed with a side support, the side support comprising: a first column and a second column, the first column being connected to the first binding column via a third connecting system, the second column being connected to the second binding column via a fourth connecting system, the first column and the second column being connected via a fifth connecting system, the fifth connecting system being connected to the nearest first connecting system via a sixth connecting system, wherein the first column and the second column are both located between the first binding column and the second binding column.

[0025] This structural arrangement, with its side supports providing peripheral support for the pre-tied frame, significantly enhances the overall rigidity and torsional resistance of the pre-tied frame. The first and second uprights are positioned between the first and second binding columns, creating an approximately triangular clearance space between the third connecting system and the first binding column. Similarly, the fourth connecting system also intersects the second binding column at an oblique angle, forming another approximately triangular clearance space. This clearance space facilitates on-site rebar tying by workers and prevents the uprights from interfering with the rebar tying process.

[0026] Preferably, there are two side supports, which are located at both ends of the pre-tied frame body.

[0027] This structural design, with side supports at both ends of the pre-tied frame, creates a symmetrical and balanced support structure, improving the stability of the pre-tied steel bar frame.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention provides a pre-tying frame for reinforcing bars in box culvert prefabrication. By setting the first tying post on a first virtual plane and the second tying post on a first virtual arc surface with the curvature of the arc-shaped reinforcing bar skeleton to be tied, clear positioning points for the reinforcing bars are provided to the workers. This allows workers to directly tie the reinforcing bars according to the predetermined structure, eliminating the need to manually adjust the position and angle of the reinforcing bars based on personal experience, thereby greatly reducing positioning time and significantly improving the overall tying efficiency. The predetermined structure of the pre-tying frame ensures the dimensional accuracy of the reinforcing bar skeleton and the curvature of the arc portion, enabling precise matching with the subsequently poured box culvert formwork and improving the quality of the tied reinforcing bar skeleton. Attached Figure Description

[0029] Figure 1 This is a top view of the steel reinforcement pre-tying frame used for box culvert prefabrication; Figure 2 This is a schematic diagram of the first virtual plane and the first virtual arc surface; Figure 3 This is a front view of the steel reinforcement pre-tying frame used for box culvert prefabrication; Figure 4 Right view of the steel bar pre-tying frame used for box culvert prefabrication.

[0030] Marked in the image: 1-First binding column, 2-Second binding column, 31-First connecting system, 32-Second connecting system, 33-Third connecting system, 34-Fourth connecting system, 35-Fifth connecting system, 36-Sixth connecting system, 4-Rebar positioning rod, 5-Diagonal brace, 61-First column, 62-Second column, 100-First virtual plane, 200-First virtual arc surface, 300-Base plate. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0032] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0034] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0035] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0036] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0037] Example 1 like Figures 1-4 As shown, this embodiment provides a steel bar pre-tying frame for prefabricated box culverts, comprising: The base plate 300 has a pre-stacked frame body fixed on its upper surface. In this embodiment, the base plate 300 can be made of 16mm thick steel plate. The base plate 300 can be fixedly connected to the ground to ensure that the base plate 300 remains stable during subsequent operations.

[0038] The pre-tied frame body includes: a plurality of first tying posts 1 and a plurality of second tying posts 2, the first tying posts 1 and the second tying posts 2 are connected by a plurality of first connecting systems 31, and adjacent first tying posts 1 and adjacent second tying posts 2 are connected by second connecting systems 32.

[0039] Specifically, with Figure 1 For example, Figure 1 The first binding post 1 is located on the right side of the pre-binding frame body, and the second binding post 2 is located on the left side of the pre-binding frame body. Figure 1 This illustrates the configuration of three first binding posts 1 and three second binding posts 2. Figure 1 The positions of the first binding post 1 and the second binding post 2 are one-to-one. Specifically, the first binding post 1, the second binding post 2, the first connecting system 31, and the second connecting system 32 can all be steel pipes with a diameter of 60mm.

[0040] Among them, the first binding posts 1 are all located on the first virtual plane 100, and the second binding posts 2 are all located on the first virtual arc surface 200. Specifically, with Figure 2 For example, Figure 2 The dotted line on the left side represents the first virtual arc surface 200, and the axis of the second binding post 2 is located on the first virtual arc surface 200. Figure 2 The dotted line on the right side represents the first virtual plane 100, and the axis of the first binding post 1 is located on the first virtual plane 100.

[0041] Furthermore, the curvature of the first virtual arc surface 200 is 30°~45° (or expressed as a curvature range of 30*π / 180~45*π / 180). With this structural design, in underground engineering, the arc-shaped box culvert at the bottom of a shield tunnel typically needs to be closely fitted to the tunnel's structure. This 30°~45° angle range covers the common design of most arc-shaped sections at the bottom of shield tunnels, enabling the steel reinforcement pre-tying frame provided by this invention to precisely match the needs of engineering projects, improving the adaptability and versatility of the pre-tying frame.

[0042] Furthermore, such as Figure 1 , Figure 3 , Figure 4 As shown, the steel bar pre-tying frame for box culvert prefabrication provided in this embodiment also includes several steel bar positioning rods 4, such as... Figure 3 As shown, the rebar positioning rod 4 is vertically arranged on the first binding post 1, with one end fixedly connected to the first binding post 1 and the other end cantilevered. The rebar positioning rod 4 is also vertically arranged on the second binding post 2, with one end fixedly connected to the second binding post 2 and the other end cantilevered. Specifically, in this embodiment, the rebar positioning rod 4 can be made of 16mm diameter round steel.

[0043] With this structural arrangement, the rebar positioning rods 4 are vertically arranged on the first binding column 1 and the second binding column 2, providing precise positioning points for the horizontal rebars. This allows workers to easily fix the rebars in the correct positions, ensuring the three-dimensional dimensional and shape accuracy of the entire rebar cage. Furthermore, in the rebar cage of precast box culverts, in addition to the main rebars, stirrups and distribution bars are usually required. These rebars need to form a stable whole with the main rebars. The cantilever design of the rebar positioning rods 4 facilitates the positioning and binding of these auxiliary rebars. Workers can lean or hang these auxiliary rebars on the cantilevered positioning rods for binding, making rebar binding easier.

[0044] Furthermore, such as Figure 3 As shown, in the horizontal direction, adjacent rebar positioning rods 4 (rebar positioning rods 4 on adjacent first binding posts 1 and / or rebar positioning rods 4 on adjacent second binding posts 2) are located on the same horizontal plane. With this structural arrangement, when all positioning rods are on the same horizontal plane, workers do not need to repeatedly measure or adjust the height of each rebar. They simply place and bind the rebar along the positioning rods, which greatly simplifies the binding process, reduces human error, and significantly improves work efficiency.

[0045] Furthermore, the steel bar positioning rod 4 on the first binding column 1 and the steel bar positioning rod 4 on the second binding column 2 are located on the same horizontal plane.

[0046] Furthermore, the rebar positioning rods 4 are evenly distributed vertically on the first binding post 1 and the second binding post 2. By evenly distributing the positioning rods on the binding posts, the spacing between adjacent rebars in the vertical direction is ensured to be consistent, thus improving the quality of rebar binding.

[0047] Furthermore, such as Figure 3 As shown, the rebar pre-tying frame for box culvert prefabrication provided in this embodiment also includes several diagonal braces 5. One end of the diagonal brace 5 is fixedly connected to the first connecting system 31, and the other end of the diagonal brace 5 is fixedly connected to the base plate 300. The diagonal brace 5 and the first connecting system 31 are obliquely intersecting. With this structural arrangement, by setting the diagonal braces 5, it is possible to effectively resist lateral thrust or impact, such as collisions during rebar hoisting or worker operation, to prevent the pre-tying frame from lateral displacement or overturning, and to ensure the stability and safety of the entire tying process.

[0048] Furthermore, the adjacent diagonal braces 5 have opposite inclinations. Figure 1 , Figure 3 Let's take an example to illustrate. Figure 1 Three first connection systems 31 are set up in the middle, so that it can be like Figure 3 As shown, with Figure 1 The three first connecting rods 31 are connected by diagonal braces 5 with alternating inclinations. This structural arrangement, with adjacent diagonal braces 5 having opposite inclinations, creates a "V" or "X" shape in three-dimensional space. This alternating design allows the pre-stitched frame to simultaneously resist lateral forces from two opposite directions, such as forces from the direction of the first binding post 1 and the direction of the second binding post 2. One diagonal brace 5 resists a leftward thrust, while the adjacent diagonal brace 5 resists a rightward thrust. This ensures the pre-stitched frame maintains extremely high stability.

[0049] The rebar pre-tying frame for box culvert prefabrication provided in this embodiment provides workers with clear rebar positioning points by setting the first tying column 1 on the first virtual plane 100 and the second tying column 2 on the first virtual arc surface 200, which matches the arc of the curved rebar skeleton to be tied. This allows workers to directly tie the rebar according to the predetermined structure without relying on personal experience to manually adjust the position and angle of the rebar, thereby greatly reducing positioning time and significantly improving overall tying efficiency.

[0050] The pre-stitched structure ensures the dimensional accuracy of the steel reinforcement cage and the curvature of the curved parts, which can accurately match the box culvert formwork to be poured later, thus improving the quality of the tied steel reinforcement cage.

[0051] Example 2 Based on Example 1, this example provides a steel reinforcement pre-tying frame for box culvert prefabrication, such as... Figure 1As shown, a side support is also fixed on the upper surface of the base plate 300. The side support includes: a first column 61 and a second column 62. The first column 61 is connected to the first binding column 1 through a third connecting system 33. The second column 62 is connected to the second binding column 2 through a fourth connecting system 34. The first column 61 and the second column 62 are connected by a fifth connecting system 35. The fifth connecting system 35 is connected to the nearest first connecting system 31 through a sixth connecting system 36. The first column 61 and the second column 62 are both located between the first binding column 1 and the second binding column 2.

[0052] This structural design, with its side supports providing peripheral support for the pre-tied frame, significantly enhances the overall rigidity and torsional resistance of the pre-tied frame. For example... Figure 1 As shown, the first post 61 and the second post 62 are both located between the first binding post 1 and the second binding post 2, such that the third connecting system 33 intersects the first binding post 1 at an angle, forming an approximately triangular clearance space between them; the fourth connecting system 34 intersects the second binding post 2 at an angle, also forming an approximately triangular clearance space between them (e.g., Figure 1 The triangle shown by the dotted line in the lower left corner, and the other triangles have clearance space in... Figure 1 (Not shown in the image) These clearance spaces facilitate workers in tying the reinforcing bars on site, preventing the columns from interfering with the tying of the edge reinforcing bars.

[0053] Furthermore, such as Figure 1 As shown, there are two side supports, positioned at both ends of the pre-stitched frame body. For example, they could be... Figure 1 The upper and lower ends of the main body of the pre-tied steel reinforcement frame. This structural design, with side supports at both ends of the pre-tied steel reinforcement frame, creates a symmetrical and balanced support structure, improving the stability of the pre-tied steel reinforcement frame.

[0054] 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 and improvements 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 steel bar pre-tying frame for prefabricated box culverts, characterized in that, include: A base plate (300) has a pre-stuffing frame body fixed on its upper surface; The pre-tied frame body includes: a plurality of first tying posts (1) and a plurality of second tying posts (2), the first tying posts (1) and the second tying posts (2) are connected by a plurality of first connecting systems (31), and adjacent first tying posts (1) and adjacent second tying posts (2) are connected by second connecting systems (32). The first binding post (1) is located on the first virtual plane (100), and the second binding post (2) is located on the first virtual arc surface (200).

2. A steel bar pre-tying frame for prefabrication of box culverts according to claim 1, characterized in that, The first virtual arc surface (200) has an arc of 30°~45°.

3. A steel bar pre-tying frame for prefabrication of box culverts according to claim 1, characterized in that, It also includes several steel bar positioning rods (4), which are arranged vertically on the first binding column (1). One end of the steel bar positioning rod (4) is fixedly connected to the first binding column (1), and the other end of the steel bar positioning rod (4) is cantilevered.

4. A steel bar pre-tying frame for prefabrication of box culverts according to claim 3, characterized in that, The rebar positioning rod (4) is also arranged vertically on the second binding column (2). One end of the rebar positioning rod (4) is fixedly connected to the second binding column (2), and the other end of the rebar positioning rod (4) is cantilevered.

5. A steel bar pre-tying frame for prefabrication of box culverts according to claim 4, characterized in that, In the horizontal direction, the adjacent steel bar positioning rods (4) are located on the same horizontal plane.

6. A steel bar pre-tying frame for prefabrication of box culverts according to claim 4, characterized in that, The steel bar positioning rods (4) are evenly distributed vertically on the first binding column (1), and the steel bar positioning rods (4) are evenly distributed vertically on the second binding column (2).

7. A steel bar pre-tying frame for prefabrication of box culverts according to claim 1, characterized in that, It also includes several diagonal braces (5), one end of which is fixedly connected to the first connecting system (31), and the other end of which is fixedly connected to the base plate (300). The diagonal braces (5) are oblique to the first connecting system (31).

8. A steel bar pre-tying frame for prefabrication of box culverts according to claim 7, characterized in that, The adjacent diagonal braces (5) have opposite tendencies.

9. A steel bar pre-tying frame for prefabrication of box culverts according to claim 1, characterized in that, The upper surface of the base plate (300) is also fixed with a side support, which includes: a first column (61) and a second column (62). The first column (61) is connected to the first binding column (1) through a third connecting system (33). The second column (62) is connected to the second binding column (2) through a fourth connecting system (34). The first column (61) and the second column (62) are connected by a fifth connecting system (35). The fifth connecting system (35) is connected to the nearest first connecting system (31) through a sixth connecting system (36). The first column (61) and the second column (62) are both located between the first binding column (1) and the second binding column (2).

10. A steel bar pre-tying frame for prefabrication of box culverts according to claim 9, characterized in that, The number of side supports is two, and the two side supports are located at both ends of the pre-tied frame body.

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