Rock stratum foundation pit prestressed anchor cable anti-corrosion grouting sleeve

Abstract

This utility model discloses a grouting sleeve for corrosion protection of prestressed anchor cables in rock foundation pits, including a grouting sleeve located on the right side of a grouting pipe. A connecting sleeve is fixedly connected to the right end of the grouting pipe, and a grouting head is fixedly connected to the left side of the grouting sleeve. Anti-detachment components are provided on both the front and rear sides of the grouting sleeve. Each anti-detachment component includes rectangular grooves formed on the front and rear sides of the grouting sleeve, with sliding frames slidably connected to the inner cavities of the two rectangular grooves. Two fixing pins are welded to the left ends of the front and rear sides of the sliding frames. This utility model uses the grouting head and connecting sleeve for docking, allowing the grouting equipment to deliver grout to the inner cavity of the grouting pipe through the grouting sleeve. Simultaneously, the anti-detachment components ensure a tight connection between the grouting head and the connecting sleeve, preventing grout leakage, thus achieving the goals of rapid docking, tight connection, and leakage prevention.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit grouting technology, and in particular relates to the anti-corrosion grouting sleeve for prestressed anchor cables in rock foundation pits. Background Technology

[0002] Grouting of foundation pit anchor cables is a key construction technique in foundation pit support engineering. It aims to inject grout into the anchor cable holes to form a tight anchoring system between the anchor cable and the surrounding soil, thereby effectively improving the anchoring force of the anchor cable and enhancing the stability of the foundation pit slope.

[0003] In the construction of rock foundation pits in geotechnical engineering, prestressed anchor cable technology is a commonly used reinforcement and support method. However, the connection between some grouting sleeves and related components is fixed by clamps, which makes it difficult to form a good seal. Grout leakage is easy during grouting, affecting the grouting effect and resulting in the inability to effectively achieve anti-corrosion and anchoring functions. Therefore, it is necessary to provide anti-corrosion grouting sleeves for prestressed anchor cables in rock foundation pits. By using a force-tightening method, the grouting sleeves can be quickly connected to ensure the tightness of the connection and prevent grout leakage. Utility Model Content

[0004] The purpose of this utility model is to provide a prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits. By using a force-tightening method, the grouting sleeve can be quickly connected, ensuring the tightness of the connection and preventing grout leakage, thereby solving the above-mentioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a grouting sleeve for corrosion protection of prestressed anchor cables in rock foundation pits, including a grouting sleeve located on the right side of the grouting pipe: a connecting sleeve is fixedly connected to the right end of the grouting pipe and communicates with it; a grouting head is fixedly connected to the left side of the grouting sleeve and communicates with it; anti-detachment components are provided on the front and rear sides of the grouting sleeve; the anti-detachment components include rectangular sliding grooves opened on the front and rear sides of the grouting sleeve; a sliding frame is slidably connected to the inner cavity of the two rectangular sliding grooves; two fixing pins are welded to the left ends of the front and rear sides of the sliding frame; a rotatable anti-detachment pull ring is sleeved on the surface of the fixing pin; a connecting plate is fixedly connected to the top and bottom of the connecting sleeve; and the anti-detachment pull ring is engaged in the inner cavity of the connecting plate.

[0006] Preferably, a threaded rod is fixedly connected to the right side of the grouting sleeve, and a threaded rotor is rotatably connected to the right side of the inner cavity of the sliding frame, with the threaded rotor threadedly connected to the surface of the threaded rod.

[0007] Preferably, a torsion spring is fitted onto the surface of the fixing pin, one end of the torsion spring is welded to the sliding frame, and the other end of the torsion spring is welded to the anti-detachment pull ring.

[0008] Preferably, a sealing ring is fitted on the left side of the grouting head surface, and the surface of the sealing ring is in close contact with the inner wall of the mating sleeve.

[0009] Preferably, the surface of the grouting pipe is fitted with two bearing plates, and the inner cavity of the bearing plates is fitted with four unbonded steel strands.

[0010] Preferably, the unbonded steel strands are distributed in a ring on the surface of the grouting pipe, and a spiral rib sleeved on the surface of the unbonded steel strands is fixedly connected between the two bearing discs.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model connects the grouting head and the docking sleeve, allowing the grouting equipment to deliver grout to the inner cavity of the grouting pipe through the grouting sleeve. At the same time, the anti-detachment component ensures a tight connection between the grouting head and the docking sleeve, preventing grout leakage. This achieves the goals of rapid connection, tight connection, and prevention of leakage.

[0013] 2. This utility model uses the combined use of a threaded rod and a threaded rotating head to achieve a threaded pushing effect on the sliding frame, allowing the sliding frame to be pushed to the right. This causes the anti-detachment pull ring to engage in the inner cavity of the docking plate and pulls the docking sleeve, thereby providing a reverse force to the grouting sleeve and strengthening the tightness of the connection between the docking sleeve and the grouting head.

[0014] 3. This utility model uses a torsion spring to provide elastic twisting for the anti-detachment pull ring, allowing it to actively engage in the inner cavity of the docking plate, thereby completing the alignment and connection between the anti-detachment pull ring and the docking plate. Attached Figure Description

[0015] in:

[0016] Figure 1 This is a top view schematic diagram of one embodiment of the present utility model;

[0017] Figure 2 This is a perspective view of one embodiment of the present utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of a grouting pipe, grouting sleeve, docking sleeve, and anti-detachment component according to an embodiment of the present invention;

[0019] Figure 4 This is a three-dimensional exploded view of the grouting sleeve, grouting head, and anti-detachment component according to one embodiment of the present invention.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Grouting pipe, 2. Grouting sleeve, 3. Connecting sleeve, 4. Grouting head, 5. Anti-detachment component, 51. Rectangular chute, 52. Sliding frame, 53. Fixing pin, 54. Anti-detachment pull ring, 55. Connecting plate, 6. Threaded rod, 7. Threaded rotor, 8. Torsion spring, 9. Sealing ring, 10. Bearing plate, 11. Unbonded steel strand, 12. Spiral reinforcement. Detailed Implementation

[0022] In the following description, embodiments of the prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits of this utility model will be described with reference to the accompanying drawings.

[0023] Figure 1-4 This invention illustrates an embodiment of a prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits, comprising a grouting sleeve 2 located on the right side of a grouting pipe 1. A connecting sleeve 3 is fixedly connected to the right end of the grouting pipe 1. Two bearing plates 10 are fitted onto the surface of the grouting pipe 1. Four unbonded steel strands 11 are inserted into the inner cavity of each bearing plate 10, and the unbonded steel strands 11 are arranged in a ring on the surface of the grouting pipe 1. A spiral reinforcement 12, fitted onto the surface of the unbonded steel strands 11, is fixedly connected between the two bearing plates 10. The left side of the grouting sleeve 2... A grouting head 4 is fixedly connected to and communicates with the grouting sleeve 3. A sealing ring 9 is fitted on the left side of the surface of the grouting head 4. The surface of the sealing ring 9 is tightly fitted with the inner wall of the docking sleeve 3. Anti-detachment components 5 are provided on the front and rear sides of the grouting sleeve 2. The anti-detachment components 5 include rectangular slide grooves 51 opened on the front and rear sides of the grouting sleeve 2. A sliding frame 52 is slidably connected to the inner cavity of the two rectangular slide grooves 51. Two fixing pins 53 are welded to the left ends of the front and rear sides of the sliding frame 52. A torsion spring 8 is fitted on the surface of the fixing pin 53. One end of the torsion spring 8 is connected to the sliding frame 52. The moving frame 52 is welded, and the other end of the torsion spring 8 is welded to the anti-detachment ring 54. The torsion spring 8 provides elastic twisting for the anti-detachment ring 54, allowing it to actively engage in the inner cavity of the docking plate 55, thus completing the alignment connection between the anti-detachment ring 54 and the docking plate 55. A rotatable anti-detachment ring 54 is fitted onto the surface of the fixing pin 53. The top and bottom of the docking sleeve 3 are fixedly connected to the docking plate 55, and the anti-detachment ring 54 engages in the inner cavity of the docking plate 55. The grouting sleeve 2... A threaded rod 6 is fixedly connected to the right side, and a threaded rotor 7 is rotatably connected to the right side of the inner cavity of the sliding frame 52. The threaded rotor 7 is threadedly connected to the surface of the threaded rod 6. Through the cooperation of the threaded rod 6 and the threaded rotor 7, the sliding frame 52 is threadedly pushed, allowing the sliding frame 52 to be pushed to the right. This causes the anti-detachment pull ring 54 to engage in the inner cavity of the docking plate 55 and pulls the docking sleeve 3, thereby providing a reverse force for the grouting sleeve 2 and strengthening the connection between the docking sleeve 3 and the grouting head 4.

[0024] Working principle: When using this utility model, the user inserts the bearing plate 10, the unbonded steel strand 11, the spiral reinforcement 12, and the grouting pipe 1 into the anchor cable hole and completes grouting from the hole opening. When secondary grouting is required, the user pulls the two anti-detachment rings 54 in the opposite direction and inserts the grouting head 4 into the inner cavity of the docking sleeve 3. Releasing the anti-detachment rings 54, under the elastic action of the torsion spring 8, the two anti-detachment rings 54 rotate in opposite directions with their connection position with the fixing pin 53 as the center of rotation, and engage with the surface of the docking sleeve 3. Then, the user rotates the threaded head 7. The rotation of the threaded head 7... During the process, the grouting sleeve 2 is displaced to the right due to the threaded engagement with the threaded rod 6. At the same time, the sliding frame 52 slides to the right in the inner cavity of the rectangular sliding groove 51, which pulls the two anti-detachment pull rings 54. This causes the left side of the anti-detachment pull ring 54 to engage in the inner cavity of the docking plate 55. Under the reverse force, the grouting sleeve 2 slides to the left and pushes the grouting head 4, making it stably inserted into the inner cavity of the docking sleeve 3. Finally, the grout is transported to the inner cavity of the grouting sleeve 2 through the grouting equipment and then from the inner cavity of the grouting head 4 and the docking sleeve 3 to the inner cavity of the grouting pipe 1 for grouting.

[0025] In summary, the prestressed anchor cable anti-corrosion grouting sleeve for the rock foundation pit is connected by the grouting head 4 and the connecting sleeve 3, allowing the grouting equipment to deliver grout to the inner cavity of the grouting pipe 1 through the grouting sleeve 2. At the same time, the anti-detachment component 5 ensures a tight connection between the grouting head 4 and the connecting sleeve 3, preventing grout leakage. This achieves the goals of rapid connection, tight connection, and prevention of leakage.

Claims

1. A rock stratum foundation pit prestressed anchor cable anticorrosion grouting casing, characterized in that, The grouting sleeve (2) located on the right side of the grouting pipe (1) is provided with a docking sleeve (3) connected to the right end of the grouting pipe (1) and a grouting head (4) connected to the left side of the grouting sleeve (2). Anti-detachment components (5) are provided on the front and rear sides of the grouting sleeve (2). The anti-detachment components (5) include rectangular grooves (51) opened on the front and rear sides of the grouting sleeve (2). Sliding frames (52) are slidably connected to the inner cavities of the two rectangular grooves (51). Two fixing pins (53) are welded to the left ends of the front and rear sides of the sliding frames (52). Rotatable anti-detachment pull rings (54) are sleeved on the surface of the fixing pins (53). A docking plate (55) is fixedly connected to the top and bottom of the docking sleeve (3). The anti-detachment pull ring (54) is engaged in the inner cavity of the docking plate (55).

2. The rock stratum foundation pit prestressed anchor cable anticorrosion grouting casing according to claim 1, characterized in that, A threaded rod (6) is fixedly connected to the right side of the grouting sleeve (2), and a threaded rotor (7) is rotatably connected to the right side of the inner cavity of the sliding frame (52). The threaded rotor (7) is threadedly connected to the surface of the threaded rod (6).

3. The prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits according to claim 2, characterized in that, The surface of the fixing pin (53) is fitted with a torsion spring (8), one end of the torsion spring (8) is welded to the sliding frame (52), and the other end of the torsion spring (8) is welded to the anti-detachment pull ring (54).

4. The prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits according to claim 3, characterized in that, A sealing ring (9) is fitted on the left side of the surface of the grouting head (4), and the surface of the sealing ring (9) is tightly fitted with the inner wall of the docking sleeve (3).

5. The prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits according to claim 4, characterized in that, The surface of the grouting pipe (1) is fitted with two bearing plates (10), and four unbonded steel strands (11) are inserted into the inner cavity of the bearing plate (10).

6. The prestressed anchor cable anti-corrosion grouting sleeve for rock foundation pits according to claim 5, characterized in that, The unbonded steel strands (11) are distributed in a ring on the surface of the grouting pipe (1), and the two bearing discs (10) are fixedly connected by spiral ribs (12) sleeved on the surface of the unbonded steel strands (11).

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