Prestressed duct positioning mesh and manufacturing tool thereof

Abstract

The utility model discloses a prestressed duct positioning mesh and a manufacturing tool thereof, the positioning mesh comprises a plurality of positioning pieces, each positioning piece is provided with a prestressed duct, and the plurality of positioning pieces are arranged in parallel at intervals along the width direction. The left end and the right end of the positioning piece in the length direction are fixedly connected with the first binding steel bar and the second binding steel bar respectively. The manufacturing tool comprises a tool outer frame body, a transverse bar assembly and a longitudinal bar assembly, the transverse bar assembly and the longitudinal bar assembly are arranged in the tool outer frame body in a crossed mode, a first limiting clamping groove is formed in the transverse bar assembly and used for clamping longitudinal steel bars, and a second limiting clamping groove is formed in the longitudinal bar assembly and used for clamping transverse steel bars. According to the pre-stressed pipeline positioning mesh manufacturing tool, the pre-stressed pipeline positioning mesh is manufactured through the manufacturing tool, the manufacturing tool with the corresponding size and structure is designed according to the structural size of the positioning mesh in a design drawing, the manufacturing tool and the positioning mesh are in one-to-one correspondence, and the manufacturing precision and the manufacturing efficiency of the positioning mesh are improved.

Description

Technical Field

[0001] This utility model relates to the field of high-speed railway box girder construction technology, and in particular to a prestressed duct positioning mesh and its manufacturing tooling. Background Technology

[0002] The existing positioning mesh uses continuous reinforcing bars that extend from the top to the bottom of the positioning mesh to form prestressed ducts. However, the portion of these continuous bars located outside the prestressed ducts results in wasted reinforcing bars. Therefore, a positioning mesh design is needed to reduce this waste. Furthermore, existing prestressed duct positioning meshes are mostly manufactured manually, with workers fixing the reinforcing bars before welding. This welding method cannot guarantee the accuracy of the reinforcing bar position, easily leading to misalignment and displacement of weld points. This results in substandard prestressed ducts and a high defect rate. Moreover, manual fabrication of positioning meshes is slow and costly. Therefore, a tooling design is needed to restrict the position of the reinforcing bars within the positioning mesh. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a prestressed duct positioning mesh and its manufacturing tooling. The manufacturing tooling is used to manufacture the prestressed duct positioning mesh. The manufacturing tooling is designed according to the structural dimensions of the positioning mesh in the design drawings, and the manufacturing tooling and the positioning mesh are designed to correspond to each other. The manufacturing tooling and the positioning mesh are in a one-to-one correspondence, which improves the manufacturing accuracy and efficiency of the positioning mesh.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a prestressed duct positioning mesh, comprising multiple positioning members, each of which is provided with a prestressed duct for fixing the stress pipe, the multiple positioning members being spaced apart and arranged in parallel along the width direction, the left and right ends of the positioning members being fastened to a first binding steel bar and a second binding steel bar respectively along the length direction, the first binding steel bar and the second binding steel bar being arranged in parallel.

[0005] Preferably, the center points of the plurality of prestressed ducts are connected and parallel to the first tied reinforcing bar.

[0006] Preferably, each of the positioning elements includes longitudinal reinforcing bars and transverse reinforcing bars, with at least one longitudinal reinforcing bar and two transverse reinforcing bars, the two transverse reinforcing bars being spaced apart, and the two ends of the longitudinal reinforcing bars being connected to the two opposite transverse reinforcing bars respectively along the length direction.

[0007] This utility model also discloses a prestressed duct positioning mesh fabrication fixture, used for fabricating the positioning mesh, including a fixture outer frame, a transverse bar assembly for limiting the position of longitudinal bars, and a longitudinal bar assembly for limiting the position of transverse bars. The transverse bar assembly is also used to position the first and second tied bars. The transverse bar assembly and the longitudinal bar assembly are arranged intersectingly within the fixture outer frame. The transverse bar assembly is provided with a first limiting groove for engaging the longitudinal bars, and the longitudinal bar assembly is provided with a second limiting groove for engaging the transverse bars.

[0008] Preferably, both the first limiting slot and the second limiting slot are U-shaped structures with arc-shaped transverse ends to facilitate clamping of the reinforcing bars.

[0009] Preferably, magnetic attraction devices are provided on both sides of the vertical end of the first limiting slot and the second limiting slot; or magnetic attraction devices are provided on both sides of the horizontal end of the first limiting slot and the second limiting slot.

[0010] Preferably, the lateral end of the first limiting slot is located above the lateral end of the second limiting slot.

[0011] Preferably, the tooling frame includes a first angle steel and a second angle steel. The first angle steel has a first limiting groove at a position corresponding to the first limiting groove along its length, and the second angle steel has a second limiting groove at a position corresponding to the second limiting groove along its length.

[0012] Preferably, the magnetic attraction device is a magnet.

[0013] This utility model has the following advantages compared with the prior art:

[0014] 1. This utility model uses a fabrication fixture to fabricate prestressed pipe positioning mesh. The fabrication fixture is designed with corresponding dimensions and structure according to the structural dimensions of the positioning mesh in the design drawings. The fabrication fixture and the positioning mesh have a one-to-one correspondence, which improves the fabrication accuracy and efficiency of the positioning mesh.

[0015] 2. The positioning mesh of this utility model fixes the position of the prestressed duct by positioning the positioning member. The positioning member is fixed on the first and second binding steel bars, which saves the connecting steel bars of adjacent prestressed ducts and reduces project costs.

[0016] 3. This utility model is equipped with a magnetic attraction device at the first and second limiting slots. The magnetic attraction device attracts and clamps the steel bars in the first and second limiting slots, which improves the stability of the first and second limiting slots for clamping the steel bars and ensures the manufacturing accuracy of the positioning mesh.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the positioning mesh of this utility model;

[0019] Figure 2 This is a schematic diagram of the tooling used for manufacturing the positioning mesh of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1—Positioning element; 2—Prestressed duct; 3—First tied reinforcement;

[0022] 4—Second tied reinforcing bars; 5—Outer frame of the tooling; 6—Horizontal reinforcing bar assembly;

[0023] 7—Longitudinal reinforcement assembly; 8—First limiting slot; 9—Second limiting slot;

[0024] 10—First angle steel; 11—Second angle steel; 12—Longitudinal reinforcement;

[0025] 13—Horizontal reinforcement. Detailed Implementation

[0026] like Figure 1 As shown, this utility model discloses a prestressed duct positioning mesh, including multiple positioning members 1. Each positioning member 1 is provided with a prestressed duct 2 for fixing the stress duct. The multiple positioning members 1 are spaced apart and arranged in parallel along the width direction. The left and right ends of the positioning members 1 along the length direction are respectively fastened to the first binding steel bar 3 and the second binding steel bar 4. The first binding steel bar 3 and the second binding steel bar 4 are arranged in parallel.

[0027] The number of positioning components 1 is determined according to the construction drawings. The distance between the first binding steel bar 3 and the second binding steel bar 4 is equal to the length of the positioning component 1. Multiple positioning components 1 are spaced apart along the length direction of the first binding steel bar 3 and the second binding steel bar 4. The distance between two adjacent positioning components 1 is equal or unequal. The prestressed ducts 2 on the multiple positioning components 1 are located on the same vertical line or the same horizontal line. The long side length and short side length of each prestressed duct 2 are consistent with the diameter of the stress duct. The two ends of each positioning component 1 along the length direction are welded to the first binding steel bar 3 and the second binding steel bar 4 respectively, which reduces the connecting steel bars between two positioning components 1 and reduces the project cost.

[0028] In this embodiment, there are three positioning components 1, all of the same size, and the positions of the prestressed ducts 2 on each positioning component 1 are also the same. The interval between the first binding steel bar 3 and the second binding steel bar 4 is consistent with the length of the positioning component 1. The three positioning components 1 are equally spaced between the first binding steel bar 3 and the second binding steel bar 4 along the length direction of the first binding steel bar 3. The two ends of each positioning component 1 along the length direction are welded to the first binding steel bar 3 and the second binding steel bar 4 respectively. The positioning component 1 is fixed by the first binding steel bar 3 and the second binding steel bar 4, so that the position of each prestressed duct 2 is fixed, which facilitates the restriction of the position of the prestressed pipe, improves the installation accuracy of the prestressed pipe, and thus improves the safety and durability of the structure.

[0029] In one possible embodiment, unlike the above embodiment, starting from the end of the first binding steel bar 3, the distance between the first positioning member 1 and the second positioning member 1 is greater than the distance between the second positioning member 1 and the third positioning member 1; or the distance between the second positioning member 1 and the third positioning member 1 is greater than the distance between the first positioning member 1 and the second positioning member 1, which facilitates the restriction of prestressed ducts with different position requirements.

[0030] Furthermore, in order to reduce project costs, a second binding steel bar 4 can be set on the left side of the positioning component 1, and the first binding steel bar 3 does not need to be set on the right side of the positioning component 1. The positioning component 1 is fixed in position by the second binding steel bar 4, which reduces the number of steel bars used in the positioning mesh, and reduces project costs while ensuring the quality of the positioning mesh.

[0031] In another possible embodiment, there are four positioning elements 1, namely a first positioning element, a second positioning element, a third positioning element, and a fourth positioning element. The first, second, and third positioning elements are arranged along the length direction of the first binding steel bar 3 and the second binding steel bar 4, starting from the end of the first binding steel bar 3. The two ends of the first, second, and third positioning elements along the length direction are welded to the first binding steel bar 3 and the second binding steel bar 4, respectively. The longitudinal steel bar 12 of the third positioning element extends outward along the length direction, and the two transverse steel bars of the third positioning element... The reinforcing bar 13 extends outward, and the end of the outward extension of the transverse reinforcing bar 13 of the third positioning member is welded with the third binding reinforcing bar. The third binding reinforcing bar is parallel to the longitudinal reinforcing bar 12. The fourth positioning member is located between the extension of the longitudinal reinforcing bar 12 of the third positioning member and the third binding reinforcing bar. The center point of the prestressed duct 2 on the fourth positioning member is connected to the center point of the prestressed duct 2 on the first positioning member, the second positioning member and the third positioning member, and is parallel to the first binding reinforcing bar 3. The two ends of the fourth positioning member are respectively welded to the extension of the longitudinal reinforcing bar 12 of the third positioning member and the third binding reinforcing bar.

[0032] There is no limit to the number of positioning components 1. The number of positioning components 1 may be one, two, seven or eight. The positioning components 1 on the positioning mesh shall be set according to the requirements of the construction drawings.

[0033] The center points of multiple prestressed ducts 2 are connected and then parallel to the first tied steel bar 3.

[0034] In this embodiment, the prestressed ducts 2 on the multiple positioning members 1 arranged along the length direction of the first binding steel bar 3 are parallel to the first binding steel bar 3 in the horizontal direction or parallel to the first binding steel bar 3 in the vertical direction. The prestressed ducts 2 are used to restrict the position of the prestressed duct and improve the installation accuracy of the prestressed duct.

[0035] Each positioning component 1 includes a longitudinal steel bar 12 and a transverse steel bar 13. The number of longitudinal steel bars 12 is at least one, and the number of transverse steel bars 13 is two. The two transverse steel bars 13 are spaced apart, and the two ends of the longitudinal steel bar 12 along the length direction are respectively connected to the two opposite transverse steel bars 13.

[0036] In this embodiment, there are two longitudinal reinforcing bars 12. The size and position of the prestressed duct 2 are determined according to the construction drawings to ensure that the prestressed duct 2 can clamp the prestressed pipe. The distance between the two transverse reinforcing bars 13 and the distance between the two longitudinal reinforcing bars 12 are determined according to the size of the prestressed duct 2. The two longitudinal reinforcing bars 12 are of the same length. When the two longitudinal reinforcing bars 12 are erected on the two opposing transverse reinforcing bars 13 along the length direction, there is a distance between the longitudinal reinforcing bar 12 near the first binding reinforcing bar 3 and the first binding reinforcing bar 3, and there is a distance between the longitudinal reinforcing bar 12 near the second binding reinforcing bar 4 and the second binding reinforcing bar 4. The ends of the longitudinal reinforcing bars 12 along the length direction protrude outward from the transverse reinforcing bars 13. The longitudinal reinforcing bars 12 and the transverse reinforcing bars 13 are welded at the intersection to form a stable prestressed duct 2, which improves the accuracy of the prestressed pipe position.

[0037] In another possible embodiment, there is one longitudinal reinforcing bar 12. The size and position of the prestressed duct 2 are determined according to the construction drawings. The distance between the two transverse reinforcing bars 13 and the distance between the longitudinal reinforcing bar 12 and the first binding reinforcing bar 3 are determined according to the size of the prestressed duct 2. Alternatively, the distance between the longitudinal reinforcing bar 12 and the second binding reinforcing bar 4 is also determined. The longitudinal reinforcing bar 12 is erected on two opposing transverse reinforcing bars 13 along its length. If the longitudinal reinforcing bar 12, the first binding reinforcing bar 3, and the two transverse reinforcing bars 13 form the prestressed duct 2, then a distance is left between the longitudinal reinforcing bar 12 and the second binding reinforcing bar 4. If the longitudinal reinforcing bar 12, the second binding reinforcing bar 4, and the two transverse reinforcing bars 13 form the prestressed duct 2, then a distance is left between the longitudinal reinforcing bar 12 and the first binding reinforcing bar 3. The two ends of the longitudinal reinforcing bar 12 protrude outward from the transverse reinforcing bars 13 along its length. The longitudinal reinforcing bars 12 and the transverse reinforcing bars 13 are welded at their intersections to form a stable prestressed duct 2, thereby improving the accuracy of the prestressed duct position.

[0038] like Figure 2 As shown, a prestressed duct positioning mesh fabrication fixture is used to fabricate positioning mesh. The fixture includes an outer frame 5, a transverse reinforcement assembly 6 for limiting the position of longitudinal reinforcement 12, and a longitudinal reinforcement assembly 7 for limiting the position of transverse reinforcement 13. The transverse reinforcement assembly 6 is also used to position the first tied reinforcement 3 and the second tied reinforcement 4. The transverse reinforcement assembly 6 and the longitudinal reinforcement assembly 7 are arranged intersectingly within the outer frame 5. The transverse reinforcement assembly 6 is provided with a first limiting groove 8 for clamping the longitudinal reinforcement 12, and the longitudinal reinforcement assembly 7 is provided with a second limiting groove 9 for clamping the transverse reinforcement 13.

[0039] Based on the structure of the positioning mesh on the construction drawings, the structure of the tooling is determined. The number and position of the transverse reinforcement components 6 are determined based on the number and position of the longitudinal reinforcement bars 12 in the positioning mesh, ensuring the longitudinal reinforcement bars 12 are securely fastened to the transverse reinforcement components 6. The number and position of the longitudinal reinforcement components 7 are determined based on the number and position of the transverse reinforcement bars 13. The relative positions of the transverse reinforcement components 6 and the longitudinal reinforcement components 7 are determined based on the welding positions of the transverse reinforcement bars 13 and the longitudinal reinforcement bars 12. Simultaneously, the positions of the first limiting groove 8 on the transverse reinforcement component 6 and the second limiting groove 9 on the longitudinal reinforcement component 7 can be determined. The positioning is designed to allow the first limiting slot 8 to clamp the longitudinal reinforcing bar 12, and the second limiting slot 9 to clamp the transverse reinforcing bar 13. This prevents the transverse reinforcing bar 13 from detaching from the second limiting slot 9 or the longitudinal reinforcing bar 12 from detaching from the first limiting slot 8 when the intersection of the transverse reinforcing bar 13 and the longitudinal reinforcing bar 12 are welded together, which would affect the welding position of the transverse reinforcing bar 13 and the longitudinal reinforcing bar 12, and thus affect the production efficiency of the positioning mesh. The use of manufacturing fixtures for the production of positioning mesh ensures the uniformity of the positioning mesh size, keeps the specifications of the positioning mesh consistent, and improves the overall quality of the project.

[0040] In this embodiment, the number of positioning members 1 is three, and the center points of the three prestressed ducts 2 are connected and parallel to the first binding steel bar 3. Therefore, the number of transverse reinforcement components 6 is at least six. The six transverse reinforcement components 6 are divided into three groups. The three groups of transverse reinforcement components 6 are spaced apart along the length direction of the outer frame 5 of the fixture. The ends of the two transverse reinforcement components 6 in each group are welded to the inner sidewall of the outer frame 5 of the fixture along the length direction. The interval between the two transverse reinforcement components 6 in each group is slightly larger than the spacing between the two transverse steel bars 13. The interval between each pair of adjacent groups of transverse reinforcement components 6 is equal. Each transverse reinforcement component 6 is provided with a first limiting slot 8 along its length direction according to the relative positions of the first binding steel bar 3, the second binding steel bar 4, and the longitudinal steel bar 12 on the positioning mesh on the construction drawings, so that the first binding steel bar 3, the second binding steel bar 4, and the longitudinal steel bar 12 can all be snapped into the first limiting slot 8 at the corresponding positions. The number of longitudinal reinforcement components 7 is at least three. The three longitudinal reinforcement components 7 are spaced along the width of the outer frame 5 of the fixture. The longitudinal reinforcement components 7 are arranged at intervals along the length direction. The two ends of each longitudinal reinforcement component 7 are welded to the inner sidewall of the outer frame 5 of the tooling. According to the construction drawings, the three longitudinal reinforcement components 7 intersect with the three sets of transverse reinforcement components 6 along the length direction and are welded at the intersection. The longitudinal reinforcement components 7 are close to the welding position of the longitudinal steel bar 12 and the transverse steel bar 13, and the longitudinal reinforcement components 7 are located outside the welding point of the longitudinal steel bar 12 and the transverse steel bar 13. Based on the welding point of the transverse steel bar 13 on the positioning mesh in the construction drawings, the position of the second limiting groove 9 is determined. The part of the transverse steel bar 13 that is engaged in the second limiting groove 9 and extends outward intersects with the longitudinal steel bar 12 is the welding point of the transverse steel bar 13 and the longitudinal steel bar 12. By engaging the transverse steel bar 13 and the longitudinal steel bar 12 in the second limiting groove 9 and the first limiting groove 8 respectively, the accuracy of the welding position of the transverse steel bar 13 and the longitudinal steel bar 12 is improved, and the processing efficiency of the positioning mesh is improved.

[0041] In one possible embodiment, unlike the above embodiment, the spacing between each pair of adjacent transverse reinforcement assemblies 6 is different, which facilitates the restraint of transverse reinforcement 13 and longitudinal reinforcement 12 of different specifications.

[0042] According to the construction drawings, if the number of positioning components 1 is one, two, seven, or eight, then the number and position of the transverse reinforcement components 6 and the longitudinal reinforcement components 7 are determined according to the number and position of the positioning components 1, so that the transverse reinforcement components 6 and the longitudinal reinforcement components 7 can respectively clamp the longitudinal reinforcement 12 and the transverse reinforcement 13, ensuring the accuracy of the positioning mesh welding.

[0043] Both the first limiting slot 8 and the second limiting slot 9 are U-shaped structures with arc-shaped transverse ends to facilitate clamping of the reinforcing bars.

[0044] In this embodiment, the arc of the horizontal end of the second limiting groove 9 and the height of the vertical end are set according to the diameter of the horizontal reinforcing bar 13, so that the second limiting groove 9 is tightly clamped to the horizontal reinforcing bar 13. The arc of the horizontal end of the first limiting groove 8 and the height of the vertical end are set according to the diameter of the longitudinal reinforcing bar 12, so that the first limiting groove 8 is tightly clamped to the longitudinal reinforcing bar 12.

[0045] Both sides of the vertical end of the first limiting slot 8 and the second limiting slot 9 are provided with magnetic attraction devices; or both sides of the horizontal end of the first limiting slot 8 and the second limiting slot 9 are provided with magnetic attraction devices.

[0046] The magnetic attraction device is a magnet.

[0047] In this embodiment, to improve the clamping tightness of the first limiting groove 8 on the longitudinal reinforcing bar 12, magnetic suction devices are provided on the transverse reinforcing bar assemblies 6 on both sides of the vertical end of the first limiting groove 8. The magnetic suction devices attract the longitudinal reinforcing bar 12 clamped in the first limiting groove 8, thereby improving the stability of the longitudinal reinforcing bar 12. Magnetic suction devices are also provided on the longitudinal reinforcing bar assemblies 7 on both sides of the vertical end of the second limiting groove 9. The magnetic suction devices attract the transverse reinforcing bar 13 clamped in the second limiting groove 9, thereby improving the stability of the transverse reinforcing bar 13. Alternatively, magnetic suction devices are provided on both sides of the transverse reinforcing bar assembly 6 on the lower side of the transverse end of the first limiting groove 8, and on both sides of the longitudinal reinforcing bar assembly 7 on the lower side of the transverse end of the second limiting groove 9. The magnetic suction devices improve the stability of the clamping of the transverse reinforcing bar 13 and the longitudinal reinforcing bar 12, ensuring the manufacturing accuracy of the positioning mesh.

[0048] The lateral end of the first limiting slot 8 is located below the lateral end of the second limiting slot 9.

[0049] In this embodiment, the first limiting groove 8 is used to engage the segmented longitudinal steel bar 12. The transverse end of the first limiting groove 8 is located below the transverse end of the second limiting groove 9, so that the transverse steel bar 13 engaged on the second limiting groove 9 can exert downward pressure on the longitudinal steel bar 12, preventing the longitudinal steel bar 12 from detaching from the first limiting groove. The longitudinal steel bar 12 and the transverse steel bar 13 are located at different heights, preventing the longitudinal steel bar 12 from abutting against the transverse steel bar 13. The intersection of the longitudinal steel bar 12 and the transverse steel bar 13 is the welding point, which improves the production efficiency of the positioning mesh.

[0050] The tooling frame 5 includes a first angle steel 10 and a second angle steel 11. The first angle steel 10 is provided with a first limiting groove 8 at a position corresponding to the first limiting groove 8 along the length direction, and the second angle steel 11 is provided with a second limiting groove 9 at a position corresponding to the second limiting groove 9 along the length direction.

[0051] In this embodiment, the first limiting groove 8 on the first angle steel 10 is used to clamp the longitudinal reinforcing bar 12, and the second limiting groove 9 on the second angle steel 11 is used to clamp the transverse reinforcing bar 13, which increases the clamping points of the transverse reinforcing bar 13 and the longitudinal reinforcing bar 12 and improves the stability of the clamping of the transverse reinforcing bar 13 and the longitudinal reinforcing bar 12.

[0052] When using this device, select the appropriate tooling according to the design drawings. Since the lateral end of the second limiting slot 9 is located below the lateral end of the first limiting slot 8, it is necessary to first attach multiple segmented longitudinal steel bars 12 to the first limiting slot 8 according to the positions in the design drawings, and then attach multiple transverse steel bars 13 to the second limiting slot 9. After the transverse steel bars 13 and longitudinal steel bars 12 are attached, the intersection of the transverse steel bars 13 and longitudinal steel bars 12 is the welding point. At the same time, the magnetic attraction devices on both sides of the first limiting slot 8 attract the longitudinal steel bars 12 attached to the first limiting slot 8, and the magnetic attraction devices on both sides of the second limiting slot 9 attract the transverse steel bars 13 attached to the second limiting slot 9. This enhances the stability of the connection between the transverse steel bars 13 and longitudinal steel bars 12, prevents the transverse steel bars 13 and longitudinal steel bars 12 from shifting during the welding process, improves the welding accuracy of the transverse steel bars 13 and longitudinal steel bars 12, and thus improves the quality and processing efficiency of the positioning mesh.

[0053] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A prestressed duct positioning mesh, characterized in that: It includes multiple positioning components (1), each of which is provided with a prestressed duct (2) for fixing the stress duct. The multiple positioning components (1) are spaced apart and arranged in parallel along the width direction. The left and right ends of the positioning components (1) along the length direction are respectively fastened to the first binding steel bar (3) and the second binding steel bar (4). The first binding steel bar (3) and the second binding steel bar (4) are arranged in parallel.

2. A prestressed duct positioning mesh according to claim 1, characterized in that: The center points of the multiple prestressed ducts (2) are connected and then parallel to the first tied steel bar (3).

3. A prestressed duct positioning mesh according to claim 2, characterized in that: Each of the positioning elements (1) includes a longitudinal steel bar (12) and a transverse steel bar (13). The number of longitudinal steel bars (12) is at least one, and the number of transverse steel bars (13) is two. The two transverse steel bars (13) are spaced apart, and the two ends of the longitudinal steel bar (12) along the length direction are respectively connected to the two opposite transverse steel bars (13).

4. A prestressed duct positioning mesh fabrication fixture, used for fabricating the positioning mesh as described in claim 3, characterized in that: The tooling includes an outer frame (5), a transverse reinforcement assembly (6) for limiting the position of longitudinal reinforcement (12), and a longitudinal reinforcement assembly (7) for limiting the position of transverse reinforcement (13). The transverse reinforcement assembly (6) is also used to position the first tied reinforcement (3) and the second tied reinforcement (4). The transverse reinforcement assembly (6) and the longitudinal reinforcement assembly (7) are intersected within the outer frame (5). The transverse reinforcement assembly (6) is provided with a first limiting slot (8) for clamping the longitudinal reinforcement (12), and the longitudinal reinforcement assembly (7) is provided with a second limiting slot (9) for clamping the transverse reinforcement (13).

5. A tooling for fabricating prestressed duct positioning mesh according to claim 4, characterized in that: The first limiting slot (8) and the second limiting slot (9) are both U-shaped structures with arc-shaped transverse ends to facilitate clamping of reinforcing bars.

6. A tooling for fabricating prestressed duct positioning mesh according to claim 4, characterized in that: The first limiting slot (8) and the second limiting slot (9) are provided with magnetic suction devices on both sides of their vertical ends; or the first limiting slot (8) and the second limiting slot (9) are provided with magnetic suction devices on both sides of their horizontal ends.

7. A tooling for fabricating prestressed duct positioning mesh according to claim 4, characterized in that: The lateral end of the first limiting slot (8) is located above the lateral end of the second limiting slot (9).

8. A tooling for fabricating prestressed duct positioning mesh according to claim 4, characterized in that: The tooling outer frame (5) includes a first angle steel (10) and a second angle steel (11). The first angle steel (10) is provided with a first limiting groove (8) at a position corresponding to the first limiting groove (8) along the length direction. The second angle steel (11) is provided with a second limiting groove (9) at a position corresponding to the second limiting groove (9) along the length direction.

9. A tooling for fabricating prestressed duct positioning mesh according to claim 6, characterized in that: The magnetic attraction device is a magnet.

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