Reinforced membrane frame for circular pipe culvert

Abstract

The application discloses a circular pipe culvert steel reinforcement tire membrane frame, which comprises a cross-shaped base, the cross-shaped base is composed of two connecting rods which are vertically and transversely fixedly connected, two limiting columns are arranged at the same position of each end of each connecting rod, the two limiting columns are divided into outer limiting columns and inner limiting columns, and the circular pipe culvert steel reinforcement tire membrane frame further comprises at least three limiting frames, the multiple limiting frames are uniformly arranged on a circular arc line of the cross-shaped base with the center of the cross-shaped base as a center, and the maximum radian of the circular arc line is less than or equal to 180 degrees, the limiting frame comprises a base, a vertical rod is vertically fixed on the base, a mounting rod is fixed to the inner side end of the vertical rod, and multiple horizontal supporting rods are uniformly and interval arranged on the inner side end of the mounting rod along the height direction of the mounting rod. In the process of manufacturing the steel reinforcement cage, the distance between the outer ring steel reinforcement and the inner ring steel reinforcement of each layer can be ensured to be consistent, the distance between the upper layer steel reinforcement and the lower layer steel reinforcement can be ensured to be consistent, and the finally manufactured steel reinforcement cage can be ensured to be in a vertical state.

Description

Technical Field

[0001] This invention relates to a steel reinforcement formwork structure, and more particularly to a steel reinforcement formwork for a circular pipe culvert. Background Technology

[0002] Circular culverts are the most common type of culvert structure used in highway subgrade drainage. The culvert body is typically constructed from precast reinforced concrete. Controlling the protective layer thickness is paramount during the construction of circular culverts. To achieve this, during the reinforcement cage binding process, the spacing between the outer and inner rings of the reinforcement in each layer must be consistent, as must the spacing between upper and lower layers. Furthermore, the final reinforcement cage must be vertical. This ensures that the protective layer thickness and strength are consistent across all sections of the precast culvert.

[0003] Currently, there is no good equipment in the process of tying reinforcing bars to ensure that the spacing between the outer and inner ring reinforcing bars of each layer is consistent, that the spacing between the upper and lower layers of reinforcing bars is also consistent, and that the final reinforcing cage is in a vertical state. Summary of the Invention

[0004] The purpose of this invention is to provide a formwork frame for reinforcing bars in circular pipe culverts. During the fabrication of the reinforcing cage, the formwork frame ensures consistent spacing between the outer and inner reinforcing bars of each layer, as well as consistent spacing between upper and lower layers, and guarantees that the final reinforcing cage is generally vertical.

[0005] The technical solution of the present invention: a reinforcing steel formwork frame for a circular pipe culvert includes a cross-shaped base, which is composed of two connecting rods that are vertically and horizontally fixedly connected. At the same position at each end of each connecting rod, two limiting posts are spaced apart, which are divided into outer limiting posts and inner limiting posts. It also includes at least three limiting frames, which are evenly arranged on the arc of the cross-shaped base with the center as the center, and the maximum arc of the arc is ≤180°. Each limiting frame includes a base, on which a vertical pole is fixedly fixed. An installation rod is fixed to the inner end of the pole. Multiple horizontal support rods are evenly spaced along the height direction on the inner end of the installation rod. The bottom of the base is provided with a traveling wheel, and the top surface height of the bottom horizontal support rod is consistent with the surface height of the connecting rod.

[0006] In the aforementioned circular pipe culvert steel reinforcement formwork frame, multiple threaded rods are provided on the outer end of the installation rod along its height direction. The threaded rods pass through the groove of the upright, and locking nuts are screwed into the threads of the threaded rods.

[0007] In the aforementioned circular pipe culvert reinforcement formwork frame, the number of limiting frames is 3. The 3 limiting frames are evenly arranged on the arc line with the center of the cross-shaped base as the center, and the arc of the arc line is 180°.

[0008] In the aforementioned circular culvert steel reinforcement formwork, three limiting frames are respectively set to fit against the outer side wall of the connecting rod.

[0009] In the aforementioned circular pipe culvert steel reinforcement formwork, each connecting rod has multiple threaded holes at both ends along its length. The bottom end of the limiting post is screwed into the threaded hole, and the top end of the limiting post is a hexagonal column structure.

[0010] The beneficial effects of this invention are as follows: Compared with the prior art, this invention features a cross-shaped base with two limiting posts at each end of the two connecting rods. The outer and innermost bottom reinforcing rings are placed on the cross-shaped base, with the outer wall of the reinforcing ring contacting the limiting posts, thus positioning the bottom outer and inner reinforcing rings. Then, the limiting frames are pushed inward, bringing the inner wall of the mounting rod into contact with the outer reinforcing ring. Next, the upper reinforcing rings are sequentially inserted and placed on horizontal support rods. The horizontal support rods ensure consistent spacing between the upper and lower reinforcing rings. When the upper outer reinforcing ring is inserted into the horizontal support rod, it contacts the mounting rods of multiple limiting frames, ensuring the entire reinforcing cage remains vertical. Since the outer reinforcing rings are all in contact with the mounting rods, positioning of the outer reinforcing rings is achieved. The inner and outer reinforcing rings are fixed together by stirrups, thus positioning the inner reinforcing ring. Throughout the entire structure, the spacing between the outer and inner ring steel bars of each layer is consistent through the limiting columns, installation rods, and horizontal support rods. At the same time, the spacing between the upper and lower layers of steel bars is also consistent. Furthermore, the final steel cage is generally vertical, ensuring that the thickness of the protective layer of the prefabricated pipe body is consistent, and the structural strength is the same at every point. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 for Figure 1 A top-view structural diagram;

[0013] Figure 3 for Figure 1 Structural diagram of the installation of the reinforcing bar ring;

[0014] Figure 4 for Figure 2 Structural diagram of the installation of the reinforcing bar ring;

[0015] Figure 5 This is a schematic diagram of the back structure of the limit frame.

[0016] Reference numerals: 1-Cross-shaped base, 2-Connecting rod, 3-Limiting post, 4-Limiting frame, 5-Base, 6-Upright post, 7-Mounting rod, 8-Horizontal support rod, 9-Threaded rod, 10-Slide groove, 11-Locking nut, 12-Walking wheel, 13-Threaded hole. Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0018] Embodiments of the present invention: A reinforcing steel formwork frame for circular pipe culverts, such as... Figure 1-5 As shown, the system includes a cross-shaped base 1, which is composed of two connecting rods 2 that are welded and fixedly connected perpendicularly in a longitudinal and transverse manner. At the same position on each end of each connecting rod 2, two limiting posts 3 are spaced apart. The limiting posts 3 are divided into outer and inner limiting posts. The system also includes at least three limiting frames 4, which are evenly arranged along the arc of the cross-shaped base 1 with the center as the center, and the maximum arc angle of the arc is ≤180°. Each limiting frame 4 includes a base 5, on which a vertical pole 6 is welded and fixed. An installation rod 7 is fixed to the inner end of the pole 6. Multiple horizontal support rods 8 are evenly spaced along the height direction on the inner end of the installation rod 7. The bottom of the base 5 is equipped with wheels 12 for easy movement of the base 5 and for easy removal of the limiting frames 4 after the reinforcing cage is fabricated. The top surface height of the bottom horizontal support rod 8 is the same as the surface height of the connecting rod 2, ensuring that the height of the reinforcing rings in each layer is consistent.

[0019] During use, the outer and innermost bottom reinforcing rings are first placed on the cross-shaped base 1, with the outer wall of the reinforcing ring in contact with the limiting post 3. That is, the outer wall of the outer reinforcing ring is in contact with the inner wall of the outer limiting post 3, and the outer wall of the inner reinforcing ring is in contact with the inner wall of the inner limiting post 3. The bottom outer and inner reinforcing rings are positioned by multiple limiting posts 3. Then, the limiting frame 4 is pushed inward, so that the inner wall of the mounting rod 7 of multiple limiting frames 4 is in contact with the outer wall of the bottom outer reinforcing ring. Next, the upper reinforcing rings are sequentially inserted into the horizontal support rods 8 of multiple limiting frames 4. The horizontal support rods 8 ensure that the spacing between the upper and lower reinforcing rings is consistent. When the upper outer reinforcing ring is inserted into the horizontal support rod 8, the outer wall of the outer reinforcing ring is in contact with the inner wall of the mounting rod 7 of multiple limiting frames 4. This makes the upper and lower outer reinforcing rings overlap vertically, thus ensuring that the outer ring of the entire reinforcing cage is vertical. Since the outer ring of reinforcing bars is in contact with the mounting rod 7, the outer ring of reinforcing bars is positioned. The inner and outer rings of reinforcing bars are fixed together by stirrups. Since the stirrups are of the same size, once the outer ring of reinforcing bars is positioned, the inner ring of reinforcing bars can be positioned by connecting the outer ring of reinforcing bars with stirrups.

[0020] The reinforcing bar ring presses down on the horizontal support rod 8, and its weight holds the entire limiting frame 4 in place, preventing displacement. Because the limiting frame 4 is equipped with the horizontal support rod 8, the reinforcing bar ring cannot be placed vertically on it; it must be inserted into the horizontal support rod 8 from the side. To ensure the reinforcing bar ring can be inserted, the multiple limiting frames 4 must be evenly arranged along the arc of the cross-shaped base 1, with the maximum arc angle ≤ 180°. If the arc angle is greater than 180°, the maximum straight-line distance between the openings of two adjacent limiting frames 4 will inevitably be less than the diameter of the outer reinforcing bar ring, preventing the outer reinforcing bar ring from being inserted between the two limiting frames 4 with the largest straight-line distance. Therefore, it is essential to ensure that the maximum arc angle of the arc of the multiple limiting frames 4 is ≤ 180°.

[0021] Throughout the entire structure, the spacing between the outer and inner reinforcing steel rings of each layer can be ensured by the limiting column 3, the mounting rod 7, and the horizontal support rod 8. At the same time, the spacing between the upper and lower reinforcing steel rings is also ensured, and the final steel cage is generally vertical. This ensures that the thickness of the protective layer of the prefabricated pipe body is consistent, and the structural strength is the same at each point.

[0022] Once the entire steel cage is fabricated, the limiting frame 4 is pulled outwards by external force, and then the steel cage is lifted vertically away.

[0023] Multiple threaded rods 9 are provided along the height direction on the outer end of the mounting rod 7. The threaded rods 9 pass through the sliding groove 10 of the upright rod 6, and locking nuts 11 are screwed into the threads of the threaded rods 9. During the fabrication of the reinforcing cage, the locking nuts 11 are tightened, so that the mounting rod 7 and the upright rod 6 fit tightly together. At this time, the horizontal support rod 8 is in a horizontal state, and the upper and lower layers of reinforcing rings are supported by the horizontal support rod 8. Since each layer of reinforcing rings needs to be fixedly connected to the longitudinal reinforcing bars, the position of the reinforcing rings can be fixed by the longitudinal reinforcing bars after the reinforcing cage is completed. After the limiting frame 4 is pulled outward, the structure of the reinforcing cage will not change.

[0024] Because the reinforcing bar ring is pressed against the horizontal support rod 8, it is very difficult to pull out the limiting frame 4. To solve this problem, multiple threaded rods 9 are provided along the height direction on the outer end of the mounting rod 7. The threaded rods 9 pass through the groove 10 of the upright rod 6, and locking nuts 11 are screwed into the threads of the threaded rods 9. After the reinforcing cage is made, the locking nuts 11 are loosened, and the limiting frame 4 is pulled outward a short distance. Under the pressure of the weight of the reinforcing cage, the mounting rod 7 and the upright rod 6 separate, the threaded rods 9 deflect in the groove 10, and the horizontal support rod 8 deflects downward, causing the horizontal support rod 8 to separate from the reinforcing bar ring. At this time, it is very easy to pull out the limiting frame 4.

[0025] Three limiting frames 4 are provided, evenly arranged along the arc of the cross-shaped base 1 with the center as the center, and the arc has an arc angle of 180°. The three limiting frames 4 provide good support for all layers of reinforcing steel rings except the bottom layer. If fewer than three are provided, the reinforcing steel rings may tilt or deflect during support; if more than three are provided, the spacing between adjacent limiting frames 4 will be too small, resulting in a cramped working space for workers tying the reinforcing cage, which is detrimental to their operation. The three limiting frames 4, evenly arranged along the arc of the cross-shaped base 1 with the center as the center, and the arc angle of 180°, allow the reinforcing steel rings to be inserted into the horizontal support rod 8 from the side. Furthermore, the large distribution area of ​​the three limiting frames 4 provides good support for the reinforcing steel rings.

[0026] like Figure 2 As shown, since the two connecting rods 2 are set perpendicular to each other, and the three limiting frames 4 are respectively set against the outer side wall of the connecting rods 2, it can be ensured that the three limiting frames 4 are evenly distributed on the arc line, which can well support the steel ring.

[0027] Each connecting rod 2 has multiple threaded holes 13 at both ends along its length. The bottom end of the limiting post 3 is screwed into the threaded hole 13, and the top end of the limiting post 3 has a hexagonal prism structure. Circular culverts come in various sizes, and the size of the reinforcing steel rings varies depending on the size. When manufacturing circular culverts of different sizes, the position of the corresponding limiting post 3 needs to be adjusted. During adjustment, the bottom end of the limiting post 3 is screwed into the corresponding threaded hole. The hexagonal prism structure of the top end of the limiting post 3 facilitates clamping and screwing it in using tools.

Claims

1. A round pipe culvert steel tire membrane frame, characterized in that: The utility model relates to a cross-shaped base (1) is formed by two connecting rods (2) fixedly connected vertically and longitudinally and transversely, 2 limiting columns (3) are arranged at the same position of each end of each connecting rod (2) and are divided into outer limiting columns and inner limiting columns, three limiting racks (4) are arranged on the circular arc line of the center of the cross-shaped base (1) and the maximum radian of the circular arc line is less than or equal to 180 degrees, the limiting rack (4) comprises a base (5), a vertical rod (6) is fixedly arranged on the base (5), an installation rod (7) is fixedly arranged on the inner side end of the vertical rod (6), a plurality of horizontal support rods (8) are evenly arranged on the inner side end of the installation rod (7) along the height direction of the installation rod (7), a walking wheel (12) is arranged on the bottom of the base (5), and the top surface height of the horizontal support rod (8) at the bottom is consistent with the surface height of the connecting rod (2). A plurality of threaded rods (9) are arranged on the outer side end of the installation rod (7) along the height direction of the installation rod (7), the threaded rods (9) pass out of the sliding groove (10) of the vertical rod (6), and the threaded rods (9) are screwed with lock nuts (11) on the rods.

2. The circular pipe culvert steel reinforcement membrane mold frame according to claim 1, characterized in that: The three limiting racks (4) are arranged on the circular arc line of the center of the cross-shaped base (1) and the radian of the circular arc line is 180 degrees.

3. The circular pipe culvert steel reinforcement membrane frame according to claim 2, characterized in that: The three limiting racks (4) are arranged on the circular arc line of the center of the cross-shaped base (1) and the radian of the circular arc line is 180 degrees.

4. The reinforced cylinder pipe membrane frame according to claim 1, characterized in that: A plurality of threaded holes (13) are arranged on the two ends of each connecting rod (2) along the length direction of the connecting rod (2), the bottom end of the limiting column (3) is screwed into the threaded hole (13), and the top end of the limiting column (3) is a hexagonal column structure.

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