Prestressed cable anchoring device

Abstract

The utility model relates to the technical field of suspension bridge anchoring, and particularly discloses a prestressed cable anchoring device which comprises a pre-buried pipe and a connector fixedly connected to the end of the pre-buried pipe, a sliding way is arranged in the pre-buried pipe, a strand penetrating positioning plate is slidably connected in the sliding way and located in the pre-buried pipe, and the connector is fixedly connected to the end of the pre-buried pipe. And positioning cable holes in one-to-one correspondence with the cable penetrating holes in the connector are formed in the bundle penetrating positioning plate. A finished cable firstly penetrates through a cable penetrating hole in the connector and then penetrates through a positioning cable hole in the strand penetrating positioning plate, the strand penetrating positioning plate is pulled to shuttle in the embedded pipe till the anchor head at the rear end, and the sliding direction of the strand penetrating positioning plate in the embedded pipe is limited by the sliding way. Due to the fact that the positioning cable holes in the strand penetrating positioning plate correspond to the cable penetrating holes in the connector in a one-to-one mode, the finished cable is pulled straightly in the whole process, twisting is avoided, and the stable anchoring effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of suspension bridge anchorage technology, specifically to a prestressed cable anchorage device. Background Technology

[0002] The multi-strand anchor cable anchoring system for suspension bridges is mainly used to fix both ends of the main cable of the suspension bridge, ensuring that the main cable will not loosen or shift, thereby supporting the entire bridge structure. The multi-strand anchor cable anchoring system for suspension bridges uses multi-strand prefabricated cables instead of traditional steel strand grouting or oil-filling systems. No material is injected into the ducts, resulting in advantages such as reliable anchoring, superior corrosion resistance, simple construction, and low total life-cycle cost. Its construction principle is as follows: First, the embedded parts are installed, including front and rear anchor plates, spiral reinforcement, embedded pipes, and connectors. During installation, the focus is on ensuring the pipes are airtight and that the inclination angle of the front anchor plate meets requirements. Welding connections are made and the welds are sealed to ensure the pipes are airtight and corrosion-resistant. Next, the connectors and support plates are installed, and these are temporarily fixed to improve installation quality. Then comes the cable threading part. After the connectors and support plates are installed and fixed, the prefabricated cable is threaded straight into the duct of the connector using a traction cable threading method, ensuring a stable anchoring effect. Finally, the anchor cable is prestressed and tensioned. The tie rod is fixedly installed after the connector. At this time, the upper end of the tie rod is connected to the cable strand anchor head, and the other end is connected to the connector that is anchored to the front anchor face by the prestressed cable. Tensioning is carried out according to the set program. After completing one finished cable, it is moved to the next one to ensure the stability and firmness of the anchoring system.

[0003] The connector is installed at the front anchor head. During the cable threading process, multiple finished cables enter the pre-embedded pipe from the cable threading hole of the connector in batches, and shuttle to the rear anchor head through the pre-embedded pipe. Since there is no positioning mechanism in the pre-embedded pipe, the finished cables in the cable threading hole cannot be straight and pulled to the rear anchor head, and tangling is likely to occur during the shuttle process. Utility Model Content

[0004] The purpose of this utility model is to provide a prestressed cable anchoring device to solve the problem that there is no positioning mechanism in the pre-embedded pipe, and the finished cables in the cable hole cannot be straightened and pulled to the rear anchor head, which easily leads to tangling during the shuttle process.

[0005] To address the above issues, the following technical solution is provided:

[0006] A prestressed cable anchoring device includes an embedded pipe and a connector fixedly connected to the end of the embedded pipe. The embedded pipe has a slide rail inside, and a cable threading positioning plate is slidably connected in the slide rail. The cable threading positioning plate is located inside the embedded pipe and has positioning cable holes that correspond one-to-one with the cable threading holes on the connector.

[0007] The basic principle of the above technical solution is as follows: the finished cable first passes through the cable hole on the connector, and then through the positioning cable hole on the cable positioning plate, pulling the cable positioning plate through the pre-embedded pipe until the rear anchor head. The slide rail restricts the sliding direction of the cable positioning plate in the pre-embedded pipe.

[0008] The beneficial effects of the above technical solution are as follows: Compared with the existing method of directly using an electric hoist to pull the finished cable to the rear anchor head, this technical solution sets a cable-passing positioning plate in the pre-embedded pipe. The cable-passing positioning plate is used to first position the finished cable, and then the electric hoist pulls the cable-passing positioning plate through the pre-embedded pipe to the rear anchor head. Since the positioning cable holes on the cable-passing positioning plate correspond one-to-one with the cable-passing holes on the connector, the finished cable is pulled straight throughout the process and will not be twisted, ensuring a stable anchoring effect.

[0009] Furthermore, a slider is provided on the outer side of the cable threading positioning plate, and the slider is slidably engaged in the slide rail. The cooperation between the slider and the slide rail ensures that the cable threading positioning plate will not rotate when it passes through the pre-embedded pipe, thereby ensuring that the position of the finished cable at the rear anchor head remains unchanged.

[0010] Furthermore, anchor plates are fixedly connected to both ends of the pre-embedded pipe. The anchor plates at both ends are the front anchor plate and the rear anchor plate, respectively. Spiral reinforcements are sleeved on the outer periphery of both the front anchor plate and the rear anchor plate.

[0011] Furthermore, the front anchor plate is fixedly connected to the connector, and a pull rod is fixedly connected to the connector.

[0012] Furthermore, the rear anchor plate is fixedly connected to a support plate, and a rear protective cover is fixedly connected to the end of the support plate.

[0013] Furthermore, a front protective cover is fixedly connected to the end of the connector. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the prestressed cable anchoring device.

[0015] Figure 2 This is a schematic diagram of the structure for the connection between the threaded positioning plate and the pre-embedded pipe.

[0016] The reference numerals in the accompanying drawings include: 1. Embedded pipe; 2. Front anchor plate; 3. Rear anchor plate; 4. Spiral reinforcement; 5. Connector; 6. Support plate; 7. Rear protective cover; 8. Front protective cover; 9. Tie rod; 10. Slide rail; 11. Cable threading positioning plate; 12. Slider; 13. Positioning cable hole; 14. Finished cable. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method:

[0018] The basic implementation examples are as follows: Figure 1-2As shown:

[0019] A prestressed cable anchoring device, such as Figure 1 As shown, the device includes a pre-embedded pipe 1, with anchor plates fixedly connected to both ends. The anchor plates at both ends are a front anchor plate 2 and a rear anchor plate 3, respectively. Spiral reinforcement 4 is fitted around the outer periphery of both the front anchor plate 2 and the rear anchor plate 3. A connector 5 is fixedly connected to the end of the front anchor plate 2, and a support plate 6 is fixedly connected to the end of the rear anchor plate 3. A rear protective cover 7 is fixedly connected to the end of the support plate 6, and a front protective cover 8 is fixedly connected to the end of the connector 5. A tie rod 9 is fixedly connected to the connector 5, which has several evenly arranged cable-passing holes. A slide rail 10 is provided inside the pre-embedded pipe 1, and a cable-passing positioning plate 11 is also provided inside the pre-embedded pipe 1. Figure 2 As shown, a slider 12 is provided on the outer side of the cable threading positioning plate 11. The slider 12 is slidably engaged in the slide rail 10 so that the cable threading positioning plate 11 is slidably connected in the pre-embedded pipe 1. The cable threading positioning plate 11 is provided with positioning cable holes 13 that correspond one-to-one with the cable threading holes on the connector 5.

[0020] The specific implementation process is as follows:

[0021] The finished cable 14 first passes through the cable-passing hole on the connector 5, and then through the positioning cable hole 13 on the cable-passing positioning plate 11. The electric hoist is started to pull the cable-passing positioning plate 11 through the pre-embedded pipe 1 until the rear anchor head. The slide rail 10 restricts the sliding direction of the cable-passing positioning plate 11 in the pre-embedded pipe 1. Since the positioning cable hole 13 on the cable-passing positioning plate 11 corresponds one-to-one with the cable-passing hole on the connector 5, the finished cable 14 is pulled straight throughout the process and will not be twisted, ensuring a stable anchoring effect.

[0022] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A prestressed cable anchoring device comprising a pre-buried pipe and a connector fixedly connected to an end of the pre-buried pipe, characterized in that: The pre-buried pipe is internally provided with a sliding channel, and a cable passing positioning plate is slidingly connected in the sliding channel.

2. A pre-stressed cable anchoring device according to claim 1, characterized in that: The cable passing positioning plate is internally provided with a plurality of positioning cable holes corresponding to the cable passing holes of the connector.

3. A pre-stressed cable anchoring device according to claim 2, characterized in that: The pre-buried pipe is fixedly connected with anchor pads at both ends.

4. The pre-stressed cable anchoring device according to claim 3, wherein: The anchor pads at both ends are respectively a front end anchor pad and a rear end anchor pad.

5. A pre-stressed cable anchoring device according to claim 4, wherein: The front end anchor pad and the rear end anchor pad are both externally provided with spiral ribs.

6. A pre-stressed cable anchoring device according to claim 5, wherein: The front end anchor pad is fixedly connected with the connector. The connector is fixedly connected with a front protective cover at the end.

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