A prestressed pipeline positioning and reinforcing device

Abstract

The utility model discloses a kind of pre-stressed pipeline positioning reinforcing device, including multiple mat blocks and reinforcing plate being arranged in reinforcing mesh;Each described mat block is provided with the U-shaped groove of size adaptation with metal bellows, and the mat block is arranged at the junction of the linear shape change of metal bellows two sides;The reinforcing plate is arranged along the linear segment of metal bellows, and is fixed to reinforcing mesh by metal wire binding, and at the side of reinforcing plate and metal bellows connection, it is provided with the arc-shaped groove of adaptation with metal bellows, and metal bellows is welded into arc-shaped groove.The utility model can effectively realize the fixation of metal bellows by the mode of auxiliary fixation, so that it will not deviate in pouring and vibrating process, ensure the positional accuracy of pre-stressed pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of infrastructure construction technology, specifically relating to a prestressed pipe positioning and reinforcement device. Background Technology

[0002] The positioning and reinforcement of prestressed ducts (usually referring to metal or plastic corrugated pipes in post-tensioned prestressed concrete structures) is a key process to ensure that the prestressing tendons are accurately positioned, conform to the design, and do not shift during concrete pouring. The core requirements are precise positioning and firm fixation.

[0003] In cast-in-place box girder technology, multiple ducts are designed, each pre-embedded with a corrugated metal pipe. However, these ducts are not entirely straight; different alignment requirements exist at the ends, mid-span, and three-quarters span positions. Straightness, curves, and bend angles must all strictly adhere to design specifications. Since these ducts form the primary load-bearing structural system of the prestressed box girder, precise duct placement is crucial.

[0004] During concrete pouring and vibration, complex situations arise such as concrete impact, vibrator vibration, and personnel trampling on the equipment. It is crucial to ensure that the ducts can withstand construction loads without shifting, floating, sinking, or deforming, thus achieving precise positioning and reliable sealing after pouring. On traditional construction sites, corrugated pipes are typically tied to reinforcing mesh with metal wire, which carries a certain probability of loosening during actual construction. Utility Model Content

[0005] The purpose of this utility model is to provide a prestressed pipe positioning and reinforcement device, which can effectively fix the metal corrugated pipe by means of auxiliary fixing, so that it will not shift during the pouring and vibration process, and ensure the position accuracy of the prestressed pipe.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A prestressed duct positioning and reinforcement device includes multiple spacers and reinforcement plates disposed within a steel mesh; each spacer is provided with a U-shaped groove adapted to the size of the corrugated metal pipe, and the spacers are disposed on both sides of the connection where the shape of the corrugated metal pipe changes; the reinforcement plate is disposed along the straight section of the corrugated metal pipe and is fixed to the steel mesh by binding with metal wire, and on the side where the reinforcement plate connects to the corrugated metal pipe, an arc-shaped groove adapted to the corrugated metal pipe is provided, and the corrugated metal pipe is welded into the arc-shaped groove.

[0007] Furthermore, the binding side of the reinforcing plate is provided with multiple binding rings spaced apart.

[0008] Furthermore, the pad includes a base plate, connecting legs welded to both ends of the base plate, and the connecting legs are fixed to the reinforcing mesh.

[0009] Furthermore, the connecting leg is L-shaped and hooked and welded to the steel mesh.

[0010] Furthermore, the U-shaped groove is composed of multiple U-shaped supports that are sequentially fixed on the substrate.

[0011] Furthermore, the substrate is provided with a plurality of blind holes for connecting threads, and each U-shaped bracket is provided with a connecting through hole.

[0012] Compared with the prior art, the advantages of this utility model are: the utility model has a simple structure, is easy to implement, has a small and flexible overall structure, and can be further welded and fixed according to on-site needs, making the overall structure more flexible and variable.

[0013] Secondly, this utility model strengthens the connection strength of the straight section of the metal corrugated pipe by combining pads and reinforcing plates and by connecting the reinforcing plates; and when the shape of the metal corrugated pipe changes, pads are placed on both sides of the change to strengthen the corner, ensuring that the metal corrugated pipe does not shift or deform during the casting process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of a box girder using the prestressed duct positioning and reinforcement device of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the reinforcing plate of the prestressed pipe positioning and reinforcement device provided by this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the pad block of the prestressed pipe positioning and reinforcement device provided by this utility model.

[0018] Figure label: 1. Corrugated metal pipe; 2. Arc groove; 3. Binding ring; 4. Base plate; 5. U-shaped bracket; 6. Connecting leg. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first," "second," and "third" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," and "suspended" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] like Figures 1-3As shown, a prestressed duct positioning and reinforcement device includes multiple spacers and reinforcement plates disposed within a reinforcing mesh; each spacer is provided with a U-shaped groove adapted to the size of a corrugated metal pipe 1, and the spacers are disposed on both sides of the connection point where the shape of the corrugated metal pipe 1 changes; the reinforcement plate is disposed along the straight section of the corrugated metal pipe 1 and is fixed to the reinforcing mesh by binding with metal wire, and on the side where the reinforcement plate connects to the corrugated metal pipe 1, an arc-shaped groove 2 adapted to the corrugated metal pipe 1 is provided, and the corrugated metal pipe 1 is welded into the arc-shaped groove 2.

[0027] Compared to existing technologies, which primarily rely on a steel mesh framework and use wire ties to securely bind the corrugated pipe to the positioning steel bars, the reinforcement mainly involves increasing the number of binding points and ensuring their stability. While the metal corrugated pipe 1 can be further reinforced by spot welding multiple welding points, in actual pouring projects, it has been found that when using the metal corrugated pipe 1, the duct's shape changes multiple times, and special points such as bends and highest points bear more loads, making the metal corrugated pipe 1 prone to displacement during pouring, resulting in failure to meet design requirements. In this invention, to further enhance the positioning accuracy of the prestressed duct, spacers and reinforcing plates are provided. Reinforcing plates are tied to the steel mesh framework to enhance the stability of the straight sections of the metal corrugated pipe 1. Spacers are placed at both ends of the point where the shape changes to ensure stability at the change in shape, resulting in greater stability during subsequent pouring.

[0028] The reinforcing plate has multiple binding rings 3 spaced apart on its binding side. For straight sections with relatively simple stress conditions, binding with metal wire is sufficient. Then, the reinforcing plate is connected to the metal corrugated pipe 1 to complete the connection of the straight section. It should be noted that when connecting the metal corrugated pipe 1 by welding, care must be taken to avoid welding through the corrugated pipe or generating excessive heat that could damage it.

[0029] The pad includes a base plate 4, with connecting legs 6 welded to both ends of the base plate 4, and the connecting legs 6 are fixed to the reinforcing mesh. The connecting legs 6 are L-shaped and hooked and welded to the reinforcing mesh. The legs can be fabricated on-site, with the length of the legs determined according to the installation location to ensure that they can hook onto the main body of the reinforcing mesh.

[0030] The U-shaped groove is composed of multiple U-shaped brackets 5 sequentially fixed on a base plate. The base plate 4 has multiple threaded blind holes and a through hole on each U-shaped bracket 5. The number of U-shaped brackets 5 can be adjusted as needed to ensure the strength of the corrugated pipe at the point of change in shape.

[0031] In practical use, it is necessary to strictly follow the coordinates (planar position and height) given in the design drawings for positioning to ensure that the shape of the prestressing tendons (straight lines, curves, bend angles, etc.) fully meets the design requirements. First, based on the design drawings, clarify the pipe shape, coordinates, anchorage position, vent hole position, etc. For example, set a vent hole (which also serves as a grouting hole) at the highest point of the pipe and a drainage hole (which also serves as a grouting hole) at the lowest point to ensure smooth subsequent grouting.

[0032] Secondly, before proceeding with safety checks, inspect the quality of the corrugated pipes (no damage, deformation, or rust on the metal pipes), and prepare metal binding wire, welding machine, spacers, and reinforcing plates. Perform precise measurements and layout, and lay eight metal corrugated pipes (1) according to the layout position. The pipe cuts must be smooth and burr-free to prevent scratching the steel strands during threading. During installation, avoid flattening, damaging, or burning the pipes during construction. Furthermore, the joints of the metal corrugated pipes (1) must be tight to prevent grout leakage later.

[0033] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A prestressed duct positioning and reinforcement device, characterized in that: It includes multiple spacers and reinforcing plates set inside the steel mesh; each spacer is provided with a U-shaped groove adapted to the size of the corrugated metal pipe (1), and the spacers are set on both sides of the connection where the shape of the corrugated metal pipe (1) changes; the reinforcing plate is set along the straight section of the corrugated metal pipe (1) and is fixed to the steel mesh by binding with metal wire, and on the side where the reinforcing plate is connected to the corrugated metal pipe (1), an arc-shaped groove (2) adapted to the corrugated metal pipe (1) is provided, and the corrugated metal pipe (1) is welded into the arc-shaped groove (2).

2. The prestressed duct positioning and reinforcement device according to claim 1, characterized in that: The reinforcing plate has multiple binding rings (3) spaced apart on its binding side.

3. The prestressed duct positioning and reinforcement device according to claim 1, characterized in that: The pad includes a base plate (4) and connecting legs (6) welded to both ends of the base plate (4), and the connecting legs (6) are fixed to the steel mesh.

4. The prestressed duct positioning and reinforcement device according to claim 3, characterized in that: The connecting leg (6) is L-shaped and is hooked and welded to the steel mesh.

5. The prestressed duct positioning and reinforcement device according to claim 1, characterized in that: The U-shaped groove is composed of multiple U-shaped brackets (5) that are fixed sequentially on the substrate.

6. The prestressed duct positioning and reinforcement device according to claim 5, characterized in that: The substrate (4) is provided with multiple threaded blind holes, and each U-shaped bracket (5) is provided with a through hole.

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