A corrosion-proof prestressed anchor rod

Abstract

The utility model discloses a kind of anticorrosive prestressed anchor rod, belong to anchor rod technical field, including rock-soil, the side of rock-soil is provided with anchor rod hole, the inner cavity of anchor rod hole is sleeved with glass steel pipe.The utility model in the present application, by being equipped with glass steel pipe on the inner cavity of anchor rod hole and the outside of grouting anchor rod, and setting outer connecting ring groove and pulp flow groove on the outside of glass steel pipe, setting inner connecting ring groove on the inside of glass steel pipe, when grouting is carried out from the grouting hole on grouting anchor rod to the inner cavity of anchor rod hole, part of slurry is connected between glass steel pipe and anchor rod hole between pulp flow groove and outer connecting ring groove, another part of slurry is connected between glass steel pipe and grouting anchor rod on the inside of glass steel pipe, while slurry covers up to expand shell anchor head, grouting anchor rod is protected using glass steel pipe and slurry cooperation, avoid grouting anchor rod located in the inside of anchor rod hole from being corroded, and good practicability.

Description

Technical Field

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

[0002] Anchor bolts are widely used support components in engineering fields, primarily for reinforcing soil and rock masses or structures to improve their stability. Their working principle involves embedding the bolt into the soil or concrete, using anchoring force to transfer external loads to deeper, stable strata, thus achieving reinforcement. Anchor bolts have a wide range of applications, including slope protection, tunnel engineering, foundation pit support, and mining support. Prestressed anchor bolts consist of an anchor head, a bolt body, and a bearing plate. The anchoring force generated by the anchor head applies a certain prestress to the surrounding rock, actively reinforcing it. Existing prestressed anchor bolts, once placed in the surrounding rock, are susceptible to corrosion from other substances, affecting their service life; furthermore, the bearing plate and nut, being externally located, are also subject to corrosion from the external environment. Therefore, we propose a corrosion-resistant prestressed anchor bolt. Utility Model Content

[0003] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a corrosion-resistant prestressed anchor rod.

[0004] To solve the above problems, this utility model adopts the following technical solution: a corrosion-resistant prestressed anchor rod, comprising rock and soil, with an anchor rod hole provided on the side of the rock and soil, a fiberglass pipe sleeved in the inner cavity of the anchor rod hole, a grouting anchor rod sleeved on the inner side of the fiberglass pipe, an expansion shell anchor head sleeved at one end of the grouting anchor rod, and a pad sleeved at the other end of the grouting anchor rod extending to the outside of the rock and soil, with a nut threaded onto the end of the pad located on the outside of the grouting anchor rod, a protective mechanism provided on the outside of the pad, multiple external connecting ring grooves provided on the outside of the fiberglass pipe, multiple grout flow grooves provided on the outside of the fiberglass pipe, multiple internal connecting ring grooves provided on the inner wall of the fiberglass pipe, and multiple through holes provided on the outside of the fiberglass pipe.

[0005] As a preferred embodiment of this utility model, the protective mechanism includes a corrosion-resistant protective shell sleeved on the outside of the pad and slots formed on both sides of the pad. Two locking blocks are provided on the inner side of the corrosion-resistant protective shell, and the ends of the two locking blocks extend into the inner cavity of the slots respectively. A through hole is provided on the outer side of the corrosion-resistant protective shell, and the other end of the grouting anchor rod passes through the inner cavity of the through hole. A threaded hole is provided on the top of the corrosion-resistant protective shell, and a threaded plug is threadedly installed in the inner cavity of the threaded hole.

[0006] As a preferred embodiment of this utility model, the pad is provided with a perforation, the inner diameter of which is equal to the outer diameter of the grouting anchor rod, and a grout stop plug is provided at the other end of the pad, the end of which extends into the inner cavity of the fiberglass pipe.

[0007] In a preferred embodiment of this utility model, the outer diameter of the fiberglass pipe is equal to the inner diameter of the anchor bolt hole.

[0008] In a preferred embodiment of this utility model, the side of the pad is fitted to the inner wall of the corrosion-resistant protective shell.

[0009] As a preferred embodiment of this utility model, a sealing ring is fitted inside the through hole, and the inner side of the sealing ring fits against the outer side of the grouting anchor rod.

[0010] The advantages of this utility model are: (1) In this utility model, by fitting a fiberglass pipe inside the inner cavity of the anchor bolt hole and outside the grouting anchor bolt, and setting an outer connecting ring groove and a grout flow groove on the outer side of the fiberglass pipe, and setting an inner connecting ring groove on the inner side of the fiberglass pipe, when grouting is performed from the grouting hole on the grouting anchor bolt to the inner cavity of the anchor bolt hole, part of the grout enters between the grout flow groove and the outer connecting ring groove to connect the fiberglass pipe and the anchor bolt hole, and another part of the grout enters the inner side of the fiberglass pipe to connect the fiberglass pipe and the grouting anchor bolt. At the same time, the grout covers the expansion shell anchor head, and the fiberglass pipe and grout work together to protect the grouting anchor bolt, so as to prevent the grouting anchor bolt located inside the anchor bolt hole from being corroded.

[0011] (2) In this utility model, after the nut is used to squeeze the pad, the corrosion-resistant protective shell is installed on the outside of the pad through the cooperation of the slot and the block, and grout is injected into the inner cavity of the corrosion-resistant protective shell through the threaded hole. The corrosion-resistant protective shell and the grout in the inner cavity of the corrosion-resistant protective shell are used to protect the pad and the nut, so as to prevent the pad and the nut from being corroded by the external environment. It has good practicality. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 is an exploded view of the overall structure of this utility model.

[0014] Figure 3 is a cross-sectional schematic diagram of the anchor hole of this utility model.

[0015] Figure 4 is a structural schematic diagram of the fiberglass pipe of this utility model.

[0016] Figure 5 is a cross-sectional schematic diagram of the pad of this utility model.

[0017] Figure 6 is a schematic diagram of the corrosion-resistant protective shell of this utility model.

[0018] The labels in the diagram are as follows: 1. Soil and rock; 2. Anchor bolt hole; 3. Fiberglass pipe; 4. Grouting anchor bolt; 5. Expanding shell anchor head; 6. Washer plate; 7. Nut; 8. Protective mechanism; 9. External connecting ring groove; 10. Grout channel; 11. Internal connecting ring groove; 12. Through hole; 13. Slot; 14. Corrosion-resistant protective shell; 15. Locking block; 16. Through hole; 17. Sealing ring; 18. Threaded hole; 19. Threaded plug; 20. Perforation; 21. Grout stop plug. Detailed Implementation

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

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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. Example 1

[0022] As shown in Figures 1 to 6, a corrosion-resistant prestressed anchor bolt includes a rock and soil 1. An anchor bolt hole 2 is provided on the side of the rock and soil 1. A fiberglass pipe 3 is fitted inside the anchor bolt hole 2. A grouting anchor bolt 4 is fitted inside the fiberglass pipe 3. One end of the grouting anchor bolt 4 is fitted with an expansion shell anchor head 5. The other end of the grouting anchor bolt 4 extends to the outside of the rock and soil 1 and is fitted with a pad 6. A nut 7 is threaded onto the end of the pad 6, located outside the grouting anchor bolt 4. A protective mechanism 8 is provided on the outside of the pad 6. Multiple external connecting ring grooves 9 and multiple grout flow channels 10 are provided on the outside of the fiberglass pipe 3. Grout can enter the multiple external connecting ring grooves 9 through the grout flow channels 10, ensuring the connection strength between the fiberglass pipe 3 and the anchor bolt hole 2. Multiple internal connecting ring grooves 11 are provided on the inner wall of the fiberglass pipe 3. To ensure the strength of the grout connection between the fiberglass pipe 3 and the grouting anchor rod 4, multiple through holes 12 are provided on the outer side of the fiberglass pipe 3. Example 2

[0023] Based on Embodiment 1, as shown in Figures 1, 5, and 6, the protective mechanism 8 includes a corrosion-resistant protective shell 14 sleeved on the outside of the pad 6 and slots 13 formed on both sides of the pad 6. The corrosion-resistant protective shell 14 can be made of stainless steel, titanium alloy, or polytetrafluoroethylene. Two locking blocks 15 are provided on the inner side of the corrosion-resistant protective shell 14, and movable slots are provided on both sides of the locking blocks 15 to ensure that the locking blocks 15 can be smoothly locked into the inner cavity of the slots 13. The ends of the two locking blocks 15 extend into the inner cavity of the slots 13, respectively. A through hole 16 is provided on the outer side of the corrosion-resistant protective shell 14, and the other end of the grouting anchor rod 4 passes through the inner cavity of the through hole 16. A threaded hole 18 is provided on the top of the corrosion-resistant protective shell 14, and a threaded plug 19 is threadedly installed in the inner cavity of the threaded hole 18. Grout can be injected into the inner cavity of the corrosion-resistant protective shell 14 through the threaded hole 18, thereby protecting the corrosion-resistant protective shell 14 and the pad 6. The holes 16 are connected to each other to protect the pad 6, nut 7, etc. The inner cavity of the hole 16 is fitted with a sealing ring 17. The inner side of the sealing ring 17 fits against the outer side of the grouting anchor rod 4. The sealing ring 17 ensures the sealing between the inner wall of the hole 16 and the grouting anchor rod 4. At the same time, the sealing ring 17 is made of corrosion-resistant material. Example 3

[0024] Based on Embodiments 1 and 2, as shown in Figures 2 to 6, the pad 6 is provided with a perforation 20. The inner diameter of the perforation 20 is equal to the outer diameter of the grouting anchor 4, ensuring that the pad 6 can be fitted onto the grouting anchor 4. The other end of the pad 6 is provided with a grout stop plug 21. The end of the grout stop plug 21 extends into the inner cavity of the fiberglass pipe 3. The outer diameter of the fiberglass pipe 3 is equal to the inner diameter of the anchor hole 2, ensuring the stability of the fiberglass pipe 3 fitted into the inner cavity of the anchor hole 2. The side of the pad 6 is in contact with the inner wall of the corrosion-resistant protective shell 14, ensuring the stability of the corrosion-resistant protective shell 14 fitted onto the outside of the pad 6.

[0025] It should be noted that this utility model is a corrosion-resistant prestressed anchor rod. In use, firstly, an anchor rod hole 2 is drilled in the soil / rock 1, and a fiberglass pipe 3 is inserted into the anchor rod hole 2, allowing the expansion shell anchor head 5 at the end of the grouting anchor rod 4 to insert into the inner cavity of the anchor rod hole 2. Then, a pad 6 is fitted onto the other end of the grouting anchor rod 4. At this point, the grouting anchor rod 4 is manually pulled outwards while simultaneously rotating, causing the expansion shell anchor head 5 at the end of the grouting anchor rod 4 to fully open and engage with the inner wall of the anchor rod hole 2. Then, a nut 7 is fitted onto the other end of the grouting anchor rod 4, and a pneumatic wrench is used to tighten the nut 7, simultaneously applying prestress to the grouting anchor rod 4. Then, grout is injected into the inner cavity of the anchor rod hole 2 through the grouting hole inside the grouting anchor rod 4. A portion of the grout enters between the grout flow channel 10 and the outer connecting ring groove 9, affecting the fiberglass pipe 3 and the anchor rod hole 2. A connection is made between the two parts, and another part of the grout enters the inside of the fiberglass pipe 3 to connect the fiberglass pipe 3 and the grouting anchor rod 4. At the same time, the grout covers the expansion shell anchor head 5. Finally, the corrosion-resistant protective shell 14 is put on the outside of the pad plate 6, so that the locking block 15 of the inner cavity of the corrosion-resistant protective shell 14 is locked into the locking groove 13 on the side of the pad plate 6. The threaded plug 19 on the upper part of the corrosion-resistant protective shell 14 is removed, and grout is injected again into the inner cavity of the corrosion-resistant protective shell 14 through the threaded hole 18. After the inner cavity of the corrosion-resistant protective shell 14 is filled with grout, the threaded plug 19 is installed in the threaded hole 18. The corrosion-resistant protective shell 14 and the grout in the inner cavity of the corrosion-resistant protective shell 14 are used to protect the pad plate 6 and the nut 7.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A corrosion-resistant prestressed anchor rod, comprising soil and rock (1), characterized in that: An anchor hole (2) is provided on the side of the rock and soil (1). A fiberglass pipe (3) is fitted inside the anchor hole (2). A grouting anchor (4) is fitted inside the fiberglass pipe (3). An expansion shell anchor head (5) is fitted at one end of the grouting anchor (4). The other end of the grouting anchor (4) extends to the outside of the rock and soil (1) and is fitted with a pad (6). A nut (7) is threaded onto the end of the pad (6) and located outside the grouting anchor (4). A protective mechanism (8) is provided on the outside of the pad (6). Multiple external connecting ring grooves (9) are provided on the outside of the fiberglass pipe (3). Multiple grouting grooves (10) are provided on the outside of the fiberglass pipe (3). Multiple internal connecting ring grooves (11) are provided on the inner wall of the fiberglass pipe (3). Multiple through holes (12) are provided on the outside of the fiberglass pipe (3).

2. The anti-corrosion prestressed anchor bolt according to claim 1, characterized in that: The protective mechanism (8) includes a corrosion-resistant protective shell (14) sleeved on the outside of the pad (6) and slots (13) opened on both sides of the pad (6). Two locking blocks (15) are provided on the inner side of the corrosion-resistant protective shell (14). The ends of the two locking blocks (15) extend into the inner cavity of the slots (13). A through hole (16) is provided on the outer side of the corrosion-resistant protective shell (14). The other end of the grouting anchor (4) passes through the inner cavity of the through hole (16). A threaded hole (18) is opened on the top of the corrosion-resistant protective shell (14). A threaded plug (19) is threaded into the inner cavity of the threaded hole (18).

3. The anti-corrosion prestressed anchor bolt according to claim 1, characterized in that: The pad (6) is provided with a perforation (20), the inner diameter of the perforation (20) is equal to the outer diameter of the grouting anchor (4), and the other end of the pad (6) is provided with a grout stop plug (21), the end of the grout stop plug (21) extends into the inner cavity of the fiberglass pipe (3).

4. The anti-corrosion prestressed anchor bolt according to claim 1, characterized in that: The outer diameter of the fiberglass pipe (3) is equal to the inner diameter of the anchor hole (2).

5. A corrosion-resistant prestressed anchor rod according to claim 2, characterized in that: The side of the pad (6) is in contact with the inner wall of the corrosion-resistant protective shell (14).

6. A corrosion-resistant prestressed anchor rod according to claim 2, characterized in that: The inner cavity of the through hole (16) is fitted with a sealing ring (17), and the inner side of the sealing ring (17) is in contact with the outer side of the grouting anchor rod (4).

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