Angle-adjustable pre-stressed anchor bearing plate embedding structure

Abstract

The utility model relates to the technical field of bridge construction, and particularly discloses an angle-adjustable pre-stressed anchor backing plate embedding structure which comprises a transverse rod and an embedding structure, the embedding structure is provided with a mounting hole for a pre-stressed tendon to penetrate through, a pre-stressed anchor backing plate is mounted on the mounting hole, the embedding structure is in an incomplete regular rectangular pyramid shell shape, and the transverse rod is fixedly connected with the transverse rod. The top of the embedded structure is a horizontal top, and one bottom edge of the embedded structure is hinged to the transverse rod in parallel. The problem that the angle of an existing anchor bearing plate cannot be adjusted can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, and particularly relates to a prestressed anchor plate fitting structure with adjustable angle. Background Technique

[0002] With the rapid development of high-speed railways and expressways, long-span continuous beams are widely adopted. To improve the construction quality of the prestress of continuous beams, it is necessary to ensure the perpendicularity of prestressed tendons and anchor plates, improve the stress balance of prestressed tendons and the service life of bridges. However, in the actual construction process, due to the various shapes of on-site buildings, it is very difficult to keep the anchor plates horizontal or vertical, and the existing anchor plates cannot adjust the angle. During the construction of continuous rigid frame bridges, due to the continuous change of the segment length and height, the included angle between the W-beam anchor plate and the end form also changes. As Figure 2 shown, the vertical line is the end form that needs to be closed at the segment where each construction is carried out, the parabola is the W-beam, and the black triangle at the end of the W-beam is the end where the W-beam needs to use the anchor plate for anchoring. If the perpendicularity between the W-beam anchor plate and the prestressed tendon is to meet the design requirements, that is, the plane of the anchor plate is always perpendicular to the tail section of the parabola, usually each segment needs to cut the fitting structure 3 according to the parameters of the design drawing, and the flatness requirement of the cutting surface is relatively high. After cutting and grinding, it needs to be welded to the end formwork again. As Figure 1 shown, the existing fitting structure adopts a two-section steel plate support. Before installing the anchor plate on the support, it is necessary to estimate the dimensions and angles of the two steel plates. There is an error between the angle estimated before installation and the angle after manual actual welding installation. And because the W-beam is in a parabola shape and the included angles of the W-beams on different segments are inconsistent, it is impossible to directly batch-grind the fitting structure 3 of the same specification. Therefore, it brings great difficulties to construction workers and consumes time and energy. Therefore, an anchor plate fitting structure with adjustable angle is proposed. Content of the Utility Model

[0003] The utility model aims to provide a prestressed anchor plate fitting structure with adjustable angle to solve the problem that the angle of the existing anchor plate cannot be adjusted flexibly.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows: a prestressed anchor plate fitting structure with adjustable angle, including a cross bar, a fitting structure, and a sliding slurry stopping plate. An installation hole 6 for the prestressed tendon to pass through is provided on the fitting structure, and a prestressed anchor plate is installed on the installation hole. The fitting structure is in the shape of an incomplete regular square pyramid shell, the top of the fitting structure is a horizontal top, and one of the bottom edges of the fitting structure is hinged to the cross bar in parallel. The sliding slurry stopping plate is used to block the gap between the fitting member and the end formwork.

[0005] Furthermore, a frame stiffening rib 1 and a frame stiffening rib 2 are symmetrically arranged at the edge of the opening of the mosaic structure. The frame stiffening rib 1 is a U-shaped stiffening rib arranged along the side and bottom of the opening, and the frame stiffening rib 2 is an L-shaped stiffening rib arranged along the bottom of the opening; the lower ends of the frame stiffening ribs are respectively provided with special-shaped extension arms extending downward, and the surfaces of the special-shaped extension arms are provided with through holes for the angle adjustment screws to pass through, the cross bar is fixed on the stiffening ribs on both sides of the end template, and the surface of the end template close to the lower end of the mosaic structure is provided with a channel steel cross beam, an angle adjustment screw is hinged in the channel steel cross beam, and an angle adjustment nut is threadedly connected to the angle adjustment screw.

[0006] Furthermore, the channel steel beam is a U-shaped beam, an articulated support is installed in the opening of the channel steel beam, and the interlocking structure is connected to the articulated support through a hinge pin.

[0007] Furthermore, a sliding baffle is arranged parallel to the side of the end template close to the interlocking structure, the upper end of the sliding baffle is in contact with the side wall of the interlocking structure, and a sliding baffle stiffening rib is fixed to the front side of the sliding baffle. The sliding baffle is abutted against the end template by means of the sliding baffle fastening bolts passing through the fixing nuts in the U-shaped groove of the channel steel beam.

[0008] Furthermore, sliding stop plates are installed on both sides of the mounting hole of the interlocking structure, and the stop plates are in the shape of long strips.

[0009] Furthermore, second hinged ears are symmetrically arranged on the side wall where the mounting hole of the mosaic structure is located, and first hinged ears are respectively arranged at the positions of the cross bar corresponding to the second hinged ears. The mosaic structure is hinged on the cross bar by passing the rotating shaft through the first hinged ear and the second hinged ear at the same time.

[0010] Furthermore, each side wall of the interlocking structure is a steel plate, and a second slurry-stopping plate is installed between the sliding baffle plate and the end template, and the upper end of the second slurry-stopping plate is in contact with the side wall of the interlocking structure.

[0011] The beneficial effects of this solution are: Figure 1 , 2As shown, when the angle between the existing prestressed tendon and the end formwork changes, it is necessary to cut and grind it flat on site and then weld it to the end formwork again. This brings great difficulties to the construction workers and is time-consuming and energy-consuming. This solution is used to adjust the fitting opening surface of the anchor backing plate to always be perpendicular to the tail section of the parabola. The fixed fitting of the end formwork anchor tendon backing plate is designed as an adjustable-angle movable fitting to adapt to the change of the angle and ensure that the prestressed tendon is perpendicular to the end face of the end anchor backing plate. This combined structure adopts an adjustable-angle fitting design, which can flexibly adjust the height of the end formwork and the angle of the anchor backing plate according to the requirements of the design drawing during the construction of different segments to adapt to the change of the angle between the W tendon and the end formwork. This not only improves the construction efficiency but also ensures the compliance of the prestressed structure with the design, thus ensuring the effective transmission of prestress. Moreover, the fitting structure in this solution adopts a flat-top quadrangular pyramid shell, and the sharp corners at the top are cut off, so that it can be better demolded after the subsequent cast-in-place concrete solidifies. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a schematic diagram of the existing anchor backing plate installed on the end formwork;

[0013] Figure 2 FIG. is the upper part construction drawing of the continuous rigid frame bridge where the W tendon is located;

[0014] Figure 3 FIG. is a schematic diagram of an embodiment of the present invention;

[0015] Figure 4 FIG. is a side view of an embodiment of the present invention;

[0016] Figure 5 FIG. is a detailed schematic diagram of Embodiment 1 of the present invention fixed on the channel steel cross beam;

[0017] Figure 6 FIG. is a detailed schematic diagram of Embodiment 2 of the present invention fixed on the channel steel cross beam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following is a further detailed description through specific embodiments:

[0019] The reference numerals in the accompanying drawings of the specification include: end formwork 1, end formwork skeleton 101, end formwork panel 102, W tendon corrugated pipe 103, prestressed anchor backing plate 2, fitting structure 3, anchor backing plate connection nut 4, cross bar 51, first hinge ear 52, second hinge ear 53, installation hole 6, special-shaped extension arm 8, frame stiffening rib one 91, frame stiffening rib two 92, channel steel cross beam 10, angle adjustment screw 11, angle adjustment nut 12, hinge pin 14, hinge support 15, sliding baffle stiffening rib 16, sliding grout stop plate 17, sliding baffle 18, sliding baffle fastening bolt 19.

[0020] Embodiment 1:

[0021] Example 1 is basically as shown in the attached Figure 3 to the attached Figure 5 as shown:

[0022] An angle-adjustable prestressed anchor plate fitting structure includes a fitting structure 3 and a cross bar 51. The cross bar 51 is horizontally arranged transversely. Two first hinge ears 52 are symmetrically arranged below the cross bar 51. The fitting structure 3 is in the shape of an incomplete quadrangular pyramid shell. Specifically, the upper sharp corner of the quadrangular pyramid is flattened, and an opening is formed at the bottom surface of the quadrangular pyramid to obtain a quadrangular pyramid shell in the shape of a trumpet. The fitting structure 3 in this embodiment is welded by steel plates. A circular installation hole 6 is formed on one side wall of the fitting structure 3, and connection bolt holes corresponding to the bolt holes of the anchor plate are formed around the installation hole 6. The prestressed anchor plate 2 is fixed by an anchor plate connection nut 4. A second hinge ear 53 is welded on the upper edge of the fitting structure 3. The rotating shaft passes through the second hinge ear 53 and the first hinge ear 52 at the same time, so that the fitting structure 3 can be coaxially hinged on the cross bar 51. In this embodiment, the cross bar 51 is an inverted L-shaped cross-section upper beam, which is convenient for welding and fixing the hinge lug.

[0023] Sliding slurry-stop plates 17 are installed on the opposite side wall edges on both sides of the installation hole 6 at the bottom surface of the fitting structure 3. The sliding slurry-stop plates 17 are strip-shaped and arranged along the length of the bottom edge of the side wall. The sliding slurry-stop plates 17 extend the two sides of the bottom edge of the fitting structure 3 outward, and can be in contact with the side wall of the end mold 1 to prevent the concrete slurry from escaping from the joint between the end mold 1 and the fitting structure 3 during subsequent pouring. Specifically, the sliding slurry-stop plates 17 can be made of EVA foam board.

[0024] As Figure 3 and 4 shown, a U-shaped frame stiffener 91 is fixed at the opening edge of the fitting structure 3. Two special-shaped extended arms 8 are symmetrically arranged on the frame stiffener 91. Through holes for the angle adjustment screw 11 to pass through are formed on the special-shaped extended arms 8, which is convenient for fixing the fitting structure 3 on the channel steel cross beam 10 after subsequent rotation in place. A frame stiffener 92 is fixed at the bottom angle of the fitting structure 3. The cross section of the frame stiffener 92 is L-shaped. The two ends of the channel steel cross beam 10 are welded and fixed on the end formwork stiffener. The channel steel cross beam 10 is a U-shaped cross beam with the opening facing outward. A hinge support 15 is installed in the opening. The angle adjustment screw 11 is hinged on the channel steel cross beam 10 through a hinge pin 14 and can rotate along the hinge pin 14. An angle adjustment nut 12 is threadedly connected to the angle adjustment screw 11. Thus, the angle adjustment screw 11 and the special-shaped extended arm 8 are connected and fixed as a whole, and the lower part of the fitting structure 3 is fixed by the angle adjustment screw 11.

[0025] A sliding baffle 18 is installed below the fitting structure 3. The sliding baffle 18 is arranged parallel to the end die 1. A sliding slurry stop plate 17 is installed in parallel between the sliding baffle 18 and the end die 1 plate. Specifically, in this embodiment, the sliding slurry stop plate 17 is a self-adhesive slurry stop plate, which is pasted on the sliding baffle 18, and the upper end of the sliding slurry stop plate 17 is wrapped around the top edge of the sliding baffle 18. In addition, adjustable sliding baffles 18 are also arranged on both side walls of the fitting structure 3. Since the quadrangular pyramid structure in this solution contacts the opening of the end template through the side edges, when the quadrangular pyramid structure rotates along the upper end, that is, when moving outwards, the opening between the side surface of the quadrangular pyramid and the end die increases, and the two sides of the fitting structure 3 will gradually become triangular openings that are larger at the bottom and smaller at the top. Therefore, similarly, there is also a sliding adjustment plate for blocking. By pasting a slurry stop plate on the sliding baffle 18, the sliding baffle 18 can block the slurry leakage at both the adjusting member and the end template no matter where it slides to. After the position of the sliding baffle 18 is determined, the sliding baffle 18 and the sliding slurry stop plate 17 are pressed against the end die 1 by passing a sliding baffle fastening bolt 19 through the channel steel cross beam 10. A sliding baffle stiffening rib 16 parallel to the cross beam of the end die 1 is welded to the upper edge of the top of the sliding baffle 18. The sliding baffle stiffening rib 16 is L-shaped. Both ends of the sliding baffle stiffening rib 16 can be fixed on the external end die. The sliding baffle 18 can slide up and down. When the upper end of the sliding baffle 18 slides to contact the fitting structure 3, the sliding baffle 18 is fixed by the sliding baffle fastening bolt 19. Specifically, a sliding baffle L-shaped stiffening rib is fixed on the end template in front of the sliding baffle 18. The sliding baffle fastening bolt 19 is passed through the sliding baffle L-shaped stiffening rib 16, the sliding baffle 18, and the end die 1 plate at the same time, and the limit of the sliding baffle 18 to prevent it from falling can be completed.

[0026] The specific implementation process is as follows:

[0027] Such as Figure 1 、 2As shown in the figure, in the existing technology, the end mold 1 adopted is fixedly fitted with the anchor plate. Since the angle between the W bundle and the end mold 1 changes in different segments, this solution proposes an adjustable-angle movable fitting. The cross bar 51 is horizontally fixed on the end mold skeleton 101, and an end mold panel 102 is laid on the surface of the end mold skeleton 101. The W bundle corrugated pipe 103 obliquely penetrates out of the template. The fitting structure 3 rotates along the cross bar 51, so that the mounting hole 6 on the fitting structure 3 can be adjusted to be perpendicular to the W bundle. After the fitting structure 3 is fixed on the end mold 1 by using the angle adjustment screw 11, the angle adjustment nut 12, and the special-shaped extension arm 8, a sliding baffle is installed between the gap between the lower part of the fitting structure 3 and the end template, and a second grout stop plate is pasted on the sliding baffle. The gap between the fitting structure 3 and the end mold 1 plate is sealed by the sliding grout stop plate 17 and the sliding baffle 18. Then, a prestressed anchor plate 2 is assembled on the mounting hole 6 to ensure that the prestressed bundle is perpendicular to the end face of the end anchor plate. This solution not only improves the construction efficiency, but also ensures the compliance of the prestressed structure with the design, thereby ensuring the effective transmission of prestress.

[0028] Embodiment 2:

[0029] As Figure 6 shown in the figure, the difference between this embodiment and Embodiment 1 lies in the connection method between the sliding baffle 18 and the sliding grout stop plate 17. In this embodiment, the sliding grout stop plate 17 is wrapped around the sliding baffle 18. A sliding baffle stiffening rib 16 is provided on the top edge of the sliding baffle 18. The sliding baffle fastening bolt 19 passes through the sliding baffle stiffening rib 16, the sliding baffle 18, and the sliding grout stop plate 17 to fix the sliding grout stop plate 17 and the sliding baffle 18 into one body. In addition to having a sliding adjustment plate on the lower side of the fitting structure, the two sides of the angle adjustment structure member will gradually become a triangular opening with a larger lower part and a smaller upper part when the fitting structure moves outward. Therefore, similarly, there is also a sliding baffle to seal the gap.

[0030] The above are only the embodiments of the present invention. Common knowledge such as the specific structures and characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. An angle-adjustable prestressed anchor backing plate fitting structure, characterized in that: It includes a cross bar, a mosaic structure, and a sliding stop plate. The mosaic structure is provided with a mounting hole for the prestressed bundle to pass through, and a prestressed anchor plate is installed on the mounting hole. The mosaic structure is an incomplete regular quadrangular pyramid shell shape, and the top of the mosaic structure is a horizontal top. One of the bottom sides of the mosaic structure is hinged in parallel to the cross bar, and the sliding stop plate is used to seal the gap between the mosaic component and the end template.

2. The angle-adjustable prestressed anchor backing plate fitting structure according to claim 1, characterized in that: Frame stiffening rib one and frame stiffening rib two are symmetrically arranged at the opening edge of the mosaic structure. Frame stiffening rib one is a U-shaped stiffening rib arranged along the side and bottom of the opening, and frame stiffening rib two is an L-shaped stiffening rib arranged along the bottom of the opening; the lower ends of the frame stiffening ribs are respectively provided with special-shaped extension arms extending downward, and the surfaces of the special-shaped extension arms are provided with through holes for the angle adjustment screws to pass through; the cross bar is fixed on the stiffening ribs on both sides of the end template, and a channel steel cross beam is provided on the surface of the end template close to the lower end of the mosaic structure, an angle adjustment screw is hinged in the channel steel cross beam, and an angle adjustment nut is threadedly connected to the angle adjustment screw.

3. The angle-adjustable prestressed anchor backing plate fitting structure according to claim 2, characterized in that: The channel steel beam is a U-shaped beam, and a hinged support is installed in the opening of the channel steel beam. The interlocking structure is connected to the hinged support through a hinge pin.

4. The angle-adjustable prestressed anchor backing plate fitting structure according to claim 3, characterized in that: A sliding baffle is arranged parallel to the side of the end template close to the interlocking structure, the upper end of the sliding baffle is in contact with the side wall of the interlocking structure, a sliding baffle stiffening rib is fixed to the front side of the sliding baffle, and the sliding baffle is abutted against the end template by sliding baffle fastening bolts passing through the end template crossbeam.

5. The prestressed anchor plate fitting structure with adjustable angle according to claim 4, characterized in that: Sliding anti-slurry plates are respectively installed on the bottom edges of the opposite side walls of the mosaic structure on both sides of the mounting hole, and the sliding anti-slurry plates are in the shape of long strips; second hinged ears are symmetrically arranged on the side walls where the mounting holes are located, and first hinged ears are respectively arranged at the positions of the cross bar corresponding to the second hinged ears, and the mosaic structure is hinged on the cross bar by passing the first hinged ear and the second hinged ear through the rotating shaft at the same time.

6. The angle-adjustable prestressed anchor plate fitting structure according to claim 5, characterized in that: Each side wall of the interlocking structure is a steel plate, and a sliding stop plate is installed between the sliding baffle plate and the end template, and the upper end of the sliding stop plate is in contact with the side wall of the interlocking structure.

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