A prestressed anchor cable structure

Abstract

This utility model discloses a prestressed anchor cable structure, comprising prestressed anchor cables, lattice beams, perforated steel pads, working anchor plates, guide caps, and other components. One end of the prestressed anchor cable is connected to the guide cap, and the other end passes through a perforation in the perforated steel pad and a conical hole in the working anchor plate, connecting to both. The lattice beam is placed on the surface of the soil and rock mass requiring support, with a reinforced concrete pier between it and the perforated steel pad, forming a certain angle to ensure that the perforated steel pad, working anchor plate, and prestressed anchor cable are perpendicular to each other axially. The perforated steel pad is tightly fitted to the reinforced concrete pier and working anchor plate on both sides, respectively. This connection method allows the components to work collaboratively, effectively transferring prestress and enhancing structural stability. Simultaneously, four sets of adjustment components are spaced around the perforated steel pad. Through the cooperation of fixing rods, limiting sleeves, adjusting rods, and screws, the position of the perforated steel pad can be finely adjusted to ensure that it and the working anchor plate are perpendicular to the prestressed anchor cable axially during installation, improving installation accuracy and ensuring reasonable structural stress.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering support technology, and more specifically relates to a prestressed anchor cable structure. Background Technology

[0002] Prestressed anchor cable structures are commonly used as a support structure to maintain slope stability during excavation of soil and rock masses. Together with a wire mesh and shotcrete surface layer adhered to the soil and rock mass, they form a self-stabilizing support structure. This structure uses grouting to bond the anchor cable rods within the soil and rock mass to the surrounding soil, forming a unified load-bearing body. Prestress is provided by tensioning and locking the exposed ends. It is an actively stressed slope support structure that alters the stress state of the slope's soil and rock mass, improves the integrity and strength of unstable soil and rock masses, effectively controls slope deformation, and ensures slope stability. In conventional prestressed anchor cable structures, relative displacement can occur between the perforated steel pad and the working anchor plate at the contact surface during tensioning and locking or later use. This displacement affects the stress on the anchor cable and can even lead to anchor cable failure. Meanwhile, in actual construction, due to the inclined setting of the borehole, deviations may occur in the installation position when installing the perforated steel pad. When the working anchor plate is attached to it, it may cause the working anchor plate to be non-perpendicular to the prestressed anchor cable, which may lead to anchorage failure after prestressing. In the existing technology, when adjusting the working anchor plate, metal pads are often welded and placed between the anchor plate and the perforated steel pad for adjustment. However, this operation requires repeated adjustments, which is time-consuming and labor-intensive. Utility Model Content

[0003] This invention provides a prestressed anchor cable structure to solve the problems existing in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: A prestressed anchor cable structure includes prestressed anchor cables, a lattice beam, a perforated steel pad, a working anchor plate, a guide cap, an isolation frame, a wire-laying ring, a grout stop plug, a primary grouting pipe, a secondary grouting pipe, boreholes, and reinforced concrete piers. The perforated steel pad has perforations, and the working anchor plate has conical holes. One end of the prestressed anchor cable is fixed to the guide cap, and the other end passes through the perforations and the conical holes of the working anchor plate, connecting to the perforated steel pad and the working anchor plate. The lattice beam is installed on the surface of the soil or rock mass requiring support. A reinforced concrete pier is set between the lattice beam and the perforated steel pad. The lattice beam and the perforated steel pad form a certain angle to ensure that the perforated steel pad, the working anchor plate and the prestressed anchor cable are perpendicular to the axis. One side surface of the perforated steel pad is in contact with the surface of the reinforced concrete pier, and the other side surface is in contact with the surface of the working anchor plate. Four sets of adjustment components are set at intervals around the perforated steel pad. The prestressed anchor cable, guide cap, isolation frame, wire ring, grout stop plug, primary grouting pipe and secondary grouting pipe together constitute the cable structure.

[0005] The adjusting assembly includes a fixed rod, one end of which is fixed to a reinforced concrete pier, and the other end is fixed to a limit sleeve. One end of the fixed rod is connected to one end of an adjusting rod, and the other end of the adjusting rod is fixedly connected to the perforated steel pad. The adjusting rod extends into the limit sleeve and is fixed to the fixed rod by a screw.

[0006] Furthermore, the connection between the fixed rod and the adjusting rod is provided with serrations, and the two are connected by the meshing of the serrations. The internal dimension of the limiting sleeve is larger than the dimension of the connection between the fixed rod and the adjusting rod.

[0007] Furthermore, at least two screws are provided.

[0008] Furthermore, a working clip is provided at the perforation position of the prestressed anchor cable, and the working clip is inserted into the conical hole of the working anchor plate to mechanically engage with the prestressed anchor cable.

[0009] Furthermore, the borehole passes through reinforced concrete piers, lattice beams, and the rock and soil mass requiring support, and the borehole is divided into a free section and an anchored section.

[0010] Furthermore, the prestressed anchor cable is clamped together in the borehole by the overhead wire ring, the isolation frame is spaced apart and located in the anchoring section, and the prestressed anchor cable is snapped onto the isolation frame.

[0011] Furthermore, the prestressed anchor cable is spaced five times, the number of conical holes in the working anchor plate is the same as the number of prestressed anchor cables, and the number of through holes is the same as the number of conical holes in the working anchor plate.

[0012] Furthermore, both the primary grouting pipe and the secondary grouting pipe extend into the borehole and are located within the overhead line ring. An exhaust pipe is also provided between the primary grouting pipe and the secondary grouting pipe.

[0013] Furthermore, the grout stopper is located at the end of the prestressed anchor cable and below the perforated steel pad. The grout stopper is located inside the borehole and fits tightly against the borehole wall.

[0014] This utility model has the following beneficial effects: (1) One end of the prestressed anchor cable of this utility model is fixedly connected to the guide cap, and the other end passes through the perforation and the working anchor plate cone hole in sequence and is tightly connected to the perforated steel pad and the working anchor plate. At the same time, the perforated steel pad is tightly fitted with the reinforced concrete pier and the working anchor plate. This reliable connection method ensures that the components can work together and effectively transmit prestress, making the whole structure more stable when subjected to external forces.

[0015] (2) The four sets of adjustment components arranged at intervals around the perforated steel pad of this utility model can easily make fine adjustments to the position of the perforated steel pad by means of the cooperation of the fixing rod, the limiting sleeve, the adjusting rod and the screw, which helps to ensure that the perforated steel pad, the working anchor plate and the prestressed anchor cable are perpendicular to the axis during the installation process, improve the installation accuracy and ensure that the structure is subjected to reasonable stress.

[0016] (3) The connection between the fixed rod and the adjusting rod of this utility model is made with saw teeth and is connected by meshing. This design not only increases the connection strength between the two, but also provides a more stable positioning during the adjustment process, preventing the adjusting rod from sliding when under force, and further improving the accuracy and reliability of the adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cable structure of this utility model; Figure 2 yes Figure 1 Cross-sectional view at point AA; Figure 3 This is a schematic diagram of the connection structure at the exposed end of the cable of this utility model; Figure 4 This is a structural schematic diagram of the perforated steel pad of this utility model; Figure 5 This is a schematic diagram of the working anchor plate structure of this utility model; Figure 6 This is a schematic diagram of the structure of the adjustment component in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the structure of the adjustment component in Embodiment 2 of this utility model; In the diagram, 1-prestressed anchor cable, 2-lattice beam, 3-perforated steel pad, 4-working anchor plate, 5-guide cap, 6-isolation frame, 7-wire ring, 8-grout stop plug, 9-primary grouting pipe, 10-secondary grouting pipe, 11-drill hole, 12-reinforced concrete pier, 13-perforation, 14-conical hole of working anchor plate, 15-fixing rod, 16-limiting sleeve, 17-adjusting rod, 18-screw rod, 19-anchoring section, 20-serration, 21-working clamp, 22-free section, 23-vent pipe. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] Example 1

[0020] A prestressed anchor cable structure, as shown in the attached figure. Figure 1-6 As shown, the structure includes prestressed anchor cables 1, lattice beams 2, perforated steel pads 3, working anchor plates 4, guide caps 5, isolation frames 6, overhead wire rings 7, grout stop plugs 8, primary grouting pipes 9, secondary grouting pipes 10, boreholes 11, and reinforced concrete piers 12. The prestressed anchor cables 1, guide caps 5, isolation frames 6, overhead wire rings 7, grout stop plugs 8, primary grouting pipes 9, and secondary grouting pipes 10 together constitute the cable structure. The perforated steel pads 3 have perforations 13, and the working anchor plates 4 have working anchor plate conical holes 14. In this embodiment, the prestressed anchor cables 1 are spaced five times apart. The number of working anchor plate conical holes 14 is the same as the number of prestressed anchor cables 1, and the number of perforations 13 is the same as the number of working anchor plate conical holes 14. One end of the prestressed anchor cable 1 is connected to... The guide cap 5 is fixedly connected, and its other end passes through the perforation 13 and the working anchor plate conical hole 14 to connect with the perforated steel pad 3 and the working anchor plate 4. The guide cap 5 is set at the end of the prestressed anchor cable 1, which can play a guiding role on the one hand and protect the end of the prestressed anchor cable 1 from corrosion on the other hand. The lattice beam 2 is set on the surface of the rock and soil body to be supported. A reinforced concrete pier 12 is set between the lattice beam 2 and the perforated steel pad 3. The lattice beam 2 and the perforated steel pad 3 form a certain angle to ensure that the perforated steel pad 3, the working anchor plate 4 and the prestressed anchor cable 1 are perpendicular to the axis. One side surface of the perforated steel pad 3 is in contact with the surface of the reinforced concrete pier 12, and the other side surface is in contact with the surface of the working anchor plate 4. Four sets of adjustment components are set at intervals around the perforated steel pad 3.

[0021] The adjustment assembly includes a fixing rod 15, one end of which is fixed to the reinforced concrete pier 12, and the other end is fixed to a limiting sleeve 16. One end of the fixing rod 15 is connected to one end of an adjusting rod 17, and the other end of the adjusting rod 17 is fixedly connected to the perforated steel pad 3. The adjusting rod 17 extends into the limiting sleeve 16 and is fixed to the fixing rod 15 by a screw 18. In this embodiment, there are two screws 18. When it is necessary to fine-tune the position of the perforated steel pad 3, the screws 18 are loosened to adjust the length of the adjusting rod 17 extending into the limiting sleeve 16, thereby adjusting the axial angle between the perforated steel pad 3, the working anchor plate 4, and the prestressed anchor cable 1, so that the perforated steel pad 3, the working anchor plate 4, and the prestressed anchor cable 1 are perpendicular to each other. After the adjustment is completed, the screws 18 are tightened.

[0022] The prestressed anchor cable 1 is provided with a working clip 21 at the position of the perforation 13. The working clip 21 is inserted into the conical hole 14 of the working anchor plate and mechanically engages with the prestressed anchor cable 1. In this embodiment, the working clip 21 is a wedge-shaped clip. By engaging the prestressed anchor cable 1 with the wedge-shaped clip, the prestressed anchor cable 1 is firmly connected and fixed on the working anchor plate 4, ensuring the connection strength and structural stability of the connection.

[0023] Specifically, the borehole 11 passes through the reinforced concrete pier 12, the lattice beam 2, and the soil and rock mass requiring support. The borehole 11 is divided into a free section 22 and an anchoring section 19. The prestressed anchor cable 1 is clamped in the borehole 11 by the overhead wire ring 7. The isolation frame 6 is spaced apart and located in the anchoring section 19. The prestressed anchor cable 1 is snapped onto the isolation frame 6 to ensure that the prestressed anchor cable 1 is centered in the borehole 11 and to ensure that the grouting body is evenly wrapped. The overhead wire ring 7 is used in conjunction with the isolation frame 6 to tie the prestressed anchor cable 1. Furthermore, the primary grouting pipe 9 and the secondary grouting pipe 10 both extend into the borehole 11 and are located in the overhead wire ring 7. The relative positions of the grouting pipe, the vent pipe 23, and the prestressed anchor cable 1 are fixed by the overhead wire ring 7 to avoid entanglement.

[0024] The grout stopper 8 is located at the end of the prestressed anchor cable 1 and below the perforated steel pad 3. The grout stopper 8 is located inside the borehole 11 and fits tightly against the borehole wall. By sealing the borehole 11 opening, it prevents grout from overflowing during grouting.

[0025] Example 2

[0026] Further details are attached. Figure 7 As shown, to prevent the adjusting rod 17 from sliding under force and improve the accuracy and reliability of adjustment, the difference from the above embodiment is that the fixed rod 15 and the adjusting rod 17 are respectively provided with serrations 20, and the two are connected by the meshing of the serrations 20. The internal size of the limiting sleeve 16 is larger than the size of the connection between the fixed rod 15 and the adjusting rod 17.

[0027] Work process During construction, earthwork excavation, slope trimming, and hole marking are carried out at the locations requiring prestressed anchor cable support. Then, an anchor cable drilling rig is erected to drill holes 11 to the designed depth. The prestressed anchor cable 1, guide cap 5, isolation frame 6, overhead wire ring 7, grout stop plug 8, primary grouting pipe 9, and secondary grouting pipe 10, forming the cable structure, are placed into the drilled hole 11. First, grouting is performed through the primary grouting pipe 9 until grout returns to the hole opening. Then, secondary grouting is performed through the secondary grouting pipe 10 until the designed pressure value is reached. On the slope, the lattice beam 2 and steel-concrete piers are constructed. The angle between the outer surface of the truss beam 2 and the outer surface of the reinforced concrete pier 12 is determined based on the slope angle and the anchor cable inclination angle. After the strength of the grouting body, truss beam 2, and reinforced concrete pier reaches the required level, the exposed end of the prestressed anchor cable 1 is passed through the perforated steel pad 3, working anchor plate 4, perforation 13, and working anchor plate conical hole 14, and they correspond one by one. The perforated steel pad 3 is finely adjusted using the adjustment component to ensure that the perforated steel pad 3, working anchor plate 4, and prestressed anchor cable 1 are perpendicular to the axis. The prestressed anchor cable 1 is tensioned and locked to the prestressed anchor cable 1 through the working anchor plate conical hole 14 and working clamp 21.

Claims

1. A pre-stressed tendon structure, characterized in that, The structure includes prestressed anchor cables (1), lattice beams (2), perforated steel pads (3), working anchor plates (4), guide caps (5), isolation frames (6), overhead wire rings (7), grout stop plugs (8), primary grouting pipes (9), secondary grouting pipes (10), boreholes (11), and reinforced concrete piers (12). The perforated steel pads (3) have perforations (13), and the working anchor plates (4) have working anchor plate conical holes (14). One end of the prestressed anchor cable (1) is fixed to the guide cap (5), and the other end passes through the perforation (13), the working anchor plate conical hole (14), and the perforated steel pads (5). 3) The working anchor plate (4) is connected. The lattice beam (2) is set on the surface of the rock and soil body that needs to be supported. A reinforced concrete pier (12) is set between the lattice beam (2) and the perforated steel pad (3). The lattice beam (2) and the perforated steel pad (3) form a certain angle to ensure that the perforated steel pad (3), the working anchor plate (4) and the prestressed anchor cable (1) are perpendicular to each other. One side of the perforated steel pad (3) is in contact with the surface of the reinforced concrete pier (12), and the other side is in contact with the surface of the working anchor plate (4). Four sets of adjustment components are set around the perforated steel pad (3) at intervals.

2. The prestressed cable structure of claim 1, wherein, The adjustment assembly includes a fixed rod (15), one end of which is fixed to a reinforced concrete pier (12), and the other end is fixed to a limiting sleeve (16). One end of the fixed rod (15) is connected to one end of an adjustment rod (17), and the other end of the adjustment rod (17) is fixedly connected to the perforated steel pad (3). The adjustment rod (17) extends into the limiting sleeve (16) and is fixed to the fixed rod (15) by a screw (18).

3. The prestressed cable structure of claim 2, wherein, The fixed rod (15) and the adjusting rod (17) are respectively provided with saw teeth (20), and the two are connected by the meshing of the saw teeth (20). The internal size of the limiting sleeve (16) is larger than the size of the connection between the fixed rod (15) and the adjusting rod (17).

4. A pre-stressed cable structure according to claim 2 or 3, c h a r a c t e r i s e d in that The screw (18) is configured to be at least two.

5. The prestressed cable structure of claim 1, wherein, The prestressed anchor cable (1) is provided with a working clip (21) at the position of the perforation (13). The working clip (21) is inserted into the cone hole (14) of the working anchor plate and mechanically engaged with the prestressed anchor cable (1).

6. The prestressed anchor cable structure according to claim 1, characterized in that, The borehole (11) passes through the reinforced concrete pier (12), the lattice beam (2) and the rock and soil mass that needs to be supported. The borehole (11) is divided into a free section (22) and an anchored section (19).

7. The prestressed cable structure of claim 1, wherein, The prestressed anchor cable (1) is clamped in the borehole (11) by the overhead wire ring (7), the isolation frame (6) is spaced apart and located in the anchoring section (19), and the prestressed anchor cable (1) is snapped onto the isolation frame (6).

8. The prestressed cable structure of claim 1, wherein, The prestressed anchor cables (1) are spaced five apart, the number of working anchor plate conical holes (14) is the same as the number of prestressed anchor cables (1), and the number of through holes (13) is the same as the number of working anchor plate conical holes (14).

9. The prestressed cable structure of claim 1, wherein, The first-stage grouting pipe (9) and the second-stage grouting pipe (10) both extend into the borehole (11) and are located inside the overhead line ring (7). An exhaust pipe (23) is also provided between the first-stage grouting pipe (9) and the second-stage grouting pipe (10).

10. The pre-stressed cable structure of claim 1, wherein, The grout stopper (8) is located at the end of the prestressed anchor cable (1) and below the perforated steel pad (3). The grout stopper (8) is located inside the borehole (11) and fits tightly against the borehole wall.

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