A pressure type prestressed anchor rod

Abstract

The utility model discloses a pressure type prestressed anchor rod relates to prestressed anchor rod technical field, and the both ends of bushing are provided with pressure plate and steel fender respectively, is provided with the metal box on steel fender, is provided with the grouting hole on metal box, and the anchor rod body is coaxially provided with in bushing inside, and the anchor rod body bottom end is connected to pressure plate, and the anchor rod body top end passes through steel fender and stretches into metal box and is connected with nut, is provided with the conical plate above metal box, and the anchor rod body inside is embedded with two or more than two steel strand, and steel strand free end stretches out metal box and is connected with anchor after passing through conical plate, and two or more than two anchors are evenly arranged around the center axis of anchor rod body circumference. The utility model provides a pressure type prestressed anchor rod, and the stress that the anchor rod body received can be dispersed and is transmitted to the conical plate through the steel strand set up, thereby reducing the problem that anchor rod body uses and appears the shaking, and need not punch in steel fender surface, and the sealing performance is better.

Description

Technical Field

[0001] This utility model relates to the field of prestressed anchor technology, and more specifically, to a pressure-type prestressed anchor. Background Technology

[0002] Anchor bolts, a common structure in geotechnical engineering, are tension members and systems anchored in the ground to transfer the load of external structures to the ground to keep the external structures stable.

[0003] In existing technologies, for example, Chinese utility model patent CN220908391U discloses a tensioning reaction device for prestressed anti-buoyancy anchors. This device has a pad layer installed at the lower end of the foundation slab, with threaded holes at the interface between the pad layer and the steel plate. Bolt bodies are threaded into these holes, securing the pad layer and steel plate together and reducing anchor swaying or insecure installation. However, this technical solution still has the following drawbacks: while it solves the anchor swaying problem, the need to create threaded holes in the steel plate and pad layer during construction can easily lead to groundwater seeping through the gap between the threaded holes and the bolt bodies, creating exposed leakage points. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model proposes a pressure-type prestressed anchor rod. Through the setting of steel strands, the stress on the anchor rod body can be distributed and transferred to the conical plate, thereby reducing the problem of shaking of the anchor rod body during use. Moreover, there is no need to drill holes on the surface of the steel plate, resulting in better sealing performance.

[0005] To achieve this objective, the present invention adopts the following technical solution: This utility model provides a pressure-type prestressed anchor bolt, including a sleeve, a bearing plate, an anchor bolt body, a steel pad, a metal box, a nut, steel strands, a tapered plate, and an anchor. A bearing plate and a steel pad are respectively provided at both ends of the sleeve. A metal box is provided on the steel pad, and a grouting hole is provided on the metal box. The anchor bolt body is coaxially provided inside the sleeve. The bottom end of the anchor bolt body is connected to the bearing plate. The top end of the anchor bolt body passes through the steel pad and extends into the metal box to be threadedly connected to the nut. A tapered plate is provided above the metal box. Two or more steel strands are embedded inside the anchor bolt body. The free ends of the steel strands extend out of the metal box, pass through the tapered plate, and are connected to the anchor. Two or more anchors are evenly arranged circumferentially around the central axis of the anchor bolt body.

[0006] In a preferred embodiment of this invention, the steel pad and the conical plate are connected by a spiral rib, and the steel strand is located inside the spiral rib.

[0007] In a preferred embodiment of this invention, the bottom of the steel pad is further provided with supporting ribs.

[0008] In a preferred embodiment of this invention, two or more centering bearings are uniformly arranged along the axial direction on the outer wall of the sleeve.

[0009] In a preferred embodiment of this invention, both the steel strand and the sleeve are coated with an anti-corrosion coating.

[0010] In a preferred embodiment of this invention, a sealing rubber gasket is provided between the nut and the inner bottom wall of the metal box.

[0011] The beneficial effects of this utility model are as follows: The present invention proposes a pressure-type prestressed anchor rod, which, through the setting of steel strands, can disperse and transfer the stress on the anchor rod body to the conical plate, thereby reducing the problem of shaking of the anchor rod body during use, and eliminating the need to drill holes on the surface of the steel plate, resulting in better sealing performance. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a pressure-type prestressed anchor rod provided in a specific embodiment of this utility model.

[0013] 1. Sleeve; 2. Pressure plate; 3. Anchor bolt body; 4. Steel pad; 5. Metal box; 6. Nut; 7. Steel strand; 8. Conical plate; 9. Anchor; 10. Spiral reinforcement; 11. Support reinforcement; 12. Centering load-bearing body; 13. Sealing rubber pad. Detailed Implementation

[0014] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0015] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0017] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0019] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] like Figure 1As shown, the embodiment provides a pressure-type prestressed anchor bolt, including a sleeve 1, a bearing plate 2, an anchor bolt body 3, a steel pad 4, a metal box 5, a nut 6, steel strands 7, a tapered plate 8, and an anchor 9. The sleeve 1 is provided with a bearing plate 2 and a steel pad 4 at both ends, respectively. The steel pad 4 is provided with a metal box 5, which is provided with grouting holes. The anchor bolt body 3 is coaxially arranged inside the sleeve 1. The bottom end of the anchor bolt body 3 is connected to the bearing plate 2. The top end of the anchor bolt body 3 passes through the steel pad 4 and extends into the metal box 5, where it is threadedly connected to the nut 6. The tapered plate 8 is provided above the metal box 5. Two or more steel strands 7 are embedded inside the anchor bolt body 3. The free ends of the steel strands 7 extend out of the metal box 5, pass through the tapered plate 8, and are connected to the anchor 9. The two or more anchors 9 are evenly arranged circumferentially around the central axis of the anchor bolt body 3.

[0021] In this embodiment, the sleeve 1 is fitted onto the outside of the anchor body 3 to protect the internal anchor body 3. During installation, the sleeve 1 is arranged vertically, with the pressure plate 2 at the bottom and the steel pad 4 at the top. Both ends of the sleeve 1 are welded to the pressure plate 2 and the steel pad 4 at their contact points, thus eliminating gaps at the connection. The anchor body 3 is made of prestressed steel bars, and the top of the anchor body 3 has external threads. The prestress of the anchor body 3 can be adjusted by tightening the nut 6, making it convenient to use. The bottom surface of the metal box 5 is welded to the top surface of the steel pad 4. The metal box 5 has a cavity inside, and the nut 6 is placed inside the cavity. The top of the metal box 5 has a detachable end cap with a through hole for the steel strand 7 to pass through. After the nut 6 is installed, the end cap is closed, and waterproof material is injected into the cavity through the grouting hole. After it solidifies, the entire metal box 5 is sealed. The steel strands 7 disperse and transfer the stress on the anchor bolt body 3 to the conical plate 8. The conical plate 8, being a conical structure embedded within the concrete structure, interacts with the concrete and resists forces in multiple directions, making it less prone to slippage under external forces. The portion of the steel strands 7 extending out of the metal box 5 is arranged at an angle, providing inclined tension in multiple directions to the anchor bolt body 3, helping to reduce swaying or tilting. Furthermore, all components used in this embodiment are commercially available.

[0022] Specifically, such as Figure 1 As shown, the steel pad 4 and the conical plate 8 are connected by a spiral rib 10, and the steel strand 7 is located inside the spiral rib 10.

[0023] In this embodiment, the spiral rib 10 is made by bending threaded steel bars into a multi-turn spiral shape, similar to a spring, which can support and reinforce the conical plate 8. The two ends of the spiral rib 10 are welded and fixed to the steel pad 4 and the conical plate 8, respectively.

[0024] Specifically, such as Figure 1 As shown, the bottom of the steel pad 4 is also provided with a support rib 11.

[0025] In this embodiment, the support rib 11 is an L-shaped structure. The support rib 11 can further enhance the connection strength between the steel pad 4 and the concrete structure, and avoid the problem of shaking or unstable installation and positioning of the anchor body 3 during use.

[0026] Specifically, such as Figure 1 As shown, two or more centering bearings 12 are uniformly arranged along the axial direction on the outer wall of the sleeve 1.

[0027] In this embodiment, the centering bearing 12 is made of Q335B steel and has a conical structure. Two or more centering bearings 12 are arranged at equal intervals along the axial direction of the sleeve 1, which can jointly bear the anti-buoyancy force, ensure that the anchor body 3 is not damaged, and provide sufficient anti-buoyancy force.

[0028] Specifically, such as Figure 1 As shown, both the steel strand 7 and the sleeve 1 are coated with an anti-corrosion coating.

[0029] Specifically, such as Figure 1 As shown, a sealing rubber gasket 13 is provided between the nut 6 and the inner bottom wall of the metal box 5.

[0030] In this embodiment, the sealing rubber pad 13 can seal the gap between the nut 6 and the steel pad 4, preventing water from seeping into the lower sleeve 1 through the holes in the metal box 5, causing corrosion of the anchor rod body 3. The surface of the anchor rod body 3 is also coated with an anti-corrosion coating.

[0031] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A pressure-type prestressed anchor bolt, characterized in that: The components include a casing (1), a pressure plate (2), an anchor body (3), a steel pad (4), a metal box (5), a nut (6), a steel strand (7), a tapered plate (8), and an anchor (9). The casing (1) is equipped with a pressure plate (2) and a steel pad (4) at both ends. A metal box (5) is installed on the steel pad (4), and a grouting hole is installed on the metal box (5). The anchor body (3) is coaxially installed inside the casing (1), and the bottom end of the anchor body (3) is connected to the pressure plate. On plate (2), the top of the anchor body (3) passes through the steel pad (4) and extends into the metal box (5) and is threaded to the nut (6). A tapered plate (8) is provided above the metal box (5). Two or more steel strands (7) are embedded in the inner side of the anchor body (3). The free end of the steel strand (7) extends out of the metal box (5) and passes through the tapered plate (8) and is connected to the anchor (9). Two or more anchors (9) are evenly arranged around the central axis of the anchor body (3).

2. A pressure-type prestressed anchor bolt according to claim 1, characterized in that: The steel pad (4) and the conical plate (8) are connected by a spiral rib (10), and the steel strand (7) is located inside the spiral rib (10).

3. A pressure-type prestressed anchor bolt according to claim 1, characterized in that: The bottom of the steel pad (4) is also provided with a supporting rib (11).

4. A pressure-type prestressed anchor bolt according to claim 1, characterized in that: Two or more centering bearings (12) are uniformly arranged along the axial direction on the outer wall of the sleeve (1).

5. A pressure-type prestressed anchor bolt according to claim 1, characterized in that: The steel strand (7) and the sleeve (1) are both coated with an anti-corrosion coating.

6. A pressure-type prestressed anchor bolt according to claim 1, characterized in that: A sealing rubber pad (13) is provided between the nut (6) and the inner bottom wall of the metal box (5).

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