Anchor cable prestress real-time reinforcing device and method

Abstract

The invention provides an anchor cable prestress real-time reinforcing device and method, and relates to the technical field of side slope treatment, the anchor cable prestress real-time reinforcing device comprises a steel base plate making contact with a side slope, and a first hole is formed in the middle of the steel base plate in the vertical direction; the movable cushion block is located above the steel cushion plate, a trapezoid cavity is formed in the face, close to the steel cushion plate, of the movable cushion block, at least one pair of triangular prisms is contained in the trapezoid cavity, and the inclined faces of the triangular prisms make direct contact with the inclined faces, provided with the trapezoid cavity, of the movable cushion block; the pair of triangular prisms is connected through a jack, and a second hole located in the same center line with the first hole is further formed in the middle of the movable cushion block; the anchorage device is arranged on the end face, away from the steel base plate, of the movable cushion block; one end of the anchor cable is arranged in the side slope, the other end of the anchor cable sequentially penetrates through the first hole and the second hole to be fixedly connected with the anchorage device, and the device is used for monitoring the change of the prestress value in real time so as to determine the prestress loss amount caused by external factors and conduct real-time supply.

Description

Technical Field

[0001] The present invention relates to the technical field of slope management, and in particular to a device and method for real-time reinforcement of anchor cable prestress. Background Art

[0002] At present, secondary tensioning or super tensioning is usually used to reinforce the prestress of anchor cables in engineering projects. However, as time goes by, the prestress will still be lost under the influence of other external interference factors, and the secondary tensioning process is more complicated, which affects the long-term stability of slope engineering. In addition, there are some new anchor cable prestressing reinforcement devices that are equipped with compressible springs in the device and tighten the nuts to compress the springs to achieve prestress reinforcement. However, as the use time increases, the compressibility of the springs will be affected, and the prestress value of the anchor cable is usually large, which is difficult to achieve by tightening the nuts. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for real-time reinforcement of anchor cable prestressing to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0004] On the one hand, the present application provides a prestressed anchor cable real-time reinforcement device, comprising:

[0005] A steel plate in contact with the slope, wherein a first hole is vertically arranged in the middle of the steel plate;

[0006] A moving pad, the moving pad is located above the steel pad, and a trapezoidal cavity is provided on one side of the moving pad close to the steel pad, the trapezoidal cavity accommodates at least one pair of triangular prisms, the inclined surfaces of the triangular prisms are in direct contact with the inclined surface of the trapezoidal cavity provided on the moving pad; the pair of triangular prisms are connected by a jack, and a second hole is also provided in the middle of the moving pad, which is on the same center line as the first hole;

[0007] Anchor, the anchor is arranged on the end surface of the moving pad away from the steel pad;

[0008] An anchor cable, one end of which is arranged inside the slope, and the other end of which passes through the first hole and the second hole in sequence and is fixedly connected to the anchor.

[0009] Furthermore, two parallel grooves are provided on one side of the steel plate close to the anchor, and the two grooves are respectively located on both sides of the first hole.

[0010] Furthermore, there are four triangular prisms, two of which form a pair of triangular prisms, wherein a pair of triangular prisms is located on the same groove.

[0011] Furthermore, any pair of triangular prisms are symmetrically placed on the groove and maintain a gap, the top edges and inclined surfaces of the four triangular prisms form a trapezoidal body and are located in the trapezoidal body cavity of the steel pad, and the inclined surfaces of the four triangular prisms are in contact with the bottom surface of the moving pad.

[0012] Furthermore, the telescopic rod of the jack is parallel to the groove, and the telescopic rod controls a pair of triangular prisms to retract or move away from the groove.

[0013] Furthermore, it also includes a protective cover, which is arranged on the top of the anchor, and the bottom edge of the anchor is welded to the steel pad.

[0014] On the other hand, the present application also provides a method for real-time reinforcement of anchor cable prestressing, comprising:

[0015] Obtain the thrust value displayed by the jack in real time and determine the inclination angle between the triangular prism and the steel pad;

[0016] The required prestress of the anchor cable is calculated based on the thrust value displayed by the jack and the inclination angle between the triangular prism and the horizontal plane;

[0017] The strain of the anchor cable is calculated based on the required prestress of the anchor cable;

[0018] The initial length of the anchor cable is obtained, and the length of the triangular prism to be moved is calculated according to the initial length of the anchor cable and the inclination angle between the triangular prism and the horizontal plane;

[0019] The telescopic rod of the control jack makes each triangular prism extend along the groove to the length to be moved, so that the moving pad and the anchor move upward and stretch the anchor cable.

[0020] Furthermore, the method of calculating the required prestress of the anchor cable according to the thrust value displayed by the jack and the inclination angle between the triangular prism and the horizontal plane includes:

[0021] Obtaining a first friction coefficient between the triangular prism and the steel pad, and a second friction coefficient between the triangular prism and the moving pad;

[0022] When the prism and the moving pad are in equilibrium and stationary, a force balance relationship is established based on the first friction coefficient, the second friction coefficient, the thrust value displayed by the jack, and the inclination angle between the triangular prism and the horizontal plane;

[0023] Based on the force balance relationship, the counter-support force of the steel pad on the triangular prism is calculated;

[0024] Calculate the current prestress of the anchor cable according to the counterforce;

[0025] The required prestress of the anchor cable is determined based on the current prestress and the preset prestress of the anchor cable.

[0026] Further, the length of the triangular prism to be moved is calculated according to the initial length of the anchor cable and the inclination angle between the triangular prism and the horizontal plane, including:

[0027] The current length of the anchor cable is calculated based on the strain and initial length of the anchor cable;

[0028] The length difference of the anchor cable is calculated based on the initial length and current length of the anchor cable;

[0029] Establish a trigonometric function relationship between the inclination angle of the triangular prism and the horizontal plane, the length difference of the anchor cable, and the length of the triangular prism to be moved;

[0030] The length of the triangular prism to be moved is calculated based on the trigonometric function relationship.

[0031] Further, the telescopic rod of the jack is controlled to extend each triangular prism along the groove to the length to be moved, so that the moving pad and the anchor move upward and stretch the anchor cable, including:

[0032] The telescopic rod of the jack pushes the four triangular prisms outward along the groove to the length to be moved;

[0033] While the four triangular prisms move outward along the groove and the inclined surface of the triangular prism, the four triangular prisms push upward to make the anchor move upward;

[0034] As the anchor moves, the anchor cable is stretched upward so that the prestress value of the anchor cable reaches the preset prestress.

[0035] The beneficial effects of the present invention are:

[0036] The present invention monitors the change of prestress value in real time by establishing the mechanical relationship between the force of the jack and the prestress of the anchor cable, so as to determine the prestress loss caused by external factors. By establishing the geometric relationship between the elongation of the anchor cable and the displacement of the jack, the displacement of the triangular prism required to supplement the current prestress loss can be determined, and then the loss of prestress can be reinforced by controlling the displacement of the jack, thereby solving the problem of on-site prestress monitoring and realizing accurate reinforcement of prestress.

[0037] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 It is a structural schematic diagram of the anchor cable prestressed real-time reinforcement device described in an embodiment of the present invention;

[0040] Figure 2 It is a structural schematic diagram of the steel backing plate described in an embodiment of the present invention;

[0041] Figure 3 It is a structural schematic diagram of the mobile slider described in an embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram of the installation of the triangular prism and the steel pad described in the embodiment of the present invention;

[0043] Figure 5 It is a schematic diagram of the installation of the anchor cable prestressed real-time reinforcement device described in an embodiment of the present invention;

[0044] Figure 6 It is a schematic diagram of the force analysis of the triangular prism described in the embodiment of the present invention;

[0045] Figure 7 A schematic diagram of the relationship of trigonometric functions described in an embodiment of the present invention;

[0046] Figure 8 It is a schematic structural diagram of the anchor cable prestressed real-time reinforcement equipment described in an embodiment of the present invention.

[0047] Markings in the figure:

[0048] 1. Steel pad; 11. First hole; 12. Groove; 2. Moving pad; 21. Second hole; 3. Triangular prism; 4. Jack; 5. Anchor; 6. Protective cover; 7. Anchor cable; 8. Pipeline; 9. Oil pressure control center and indication area;

[0049] 800. Anchor cable prestressing real-time reinforcement equipment; 801. Processor; 802. Memory; 803. Multimedia component; 804. I / O interface; 805. Communication component. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] Embodiment 1:

[0053] like Figure 1-4 As shown, this embodiment provides a real-time reinforcement device for prestressed anchor cables, comprising:

[0054] A steel plate 1 in contact with the slope, wherein a first hole 11 is vertically arranged in the middle of the steel plate 1;

[0055] A moving pad 2, the moving pad 2 is located above the steel pad 1, and a trapezoidal cavity is provided on one side of the moving pad 2 close to the steel pad 1, the trapezoidal cavity accommodates at least one pair of triangular prisms 3, the inclined surface of the triangular prisms 3 is in direct contact with the inclined surface of the trapezoidal cavity provided on the moving pad 2; the pair of triangular prisms 3 are connected by a jack 4, and a second hole 21 is also provided in the middle of the moving pad 2 and is on the same center line as the first hole 11;

[0056] Anchor 5, the anchor 5 is arranged on the end surface of the moving pad 2 away from the steel pad 1;

[0057] An anchor cable 7, one end of which is arranged inside the slope, and the other end of which passes through the first hole 11 and the second hole 21 in sequence and is fixedly connected to the anchor 5;

[0058] In this embodiment, a steel pad 1 is provided between the moving pad 2 and the slope, which can be used to balance the friction force and facilitate subsequent calculations.

[0059] In this embodiment, the jack 4 may be a separate hydraulic micro jack 4 , which is connected to the oil pressure control center and the indication area 9 through a pipeline 8 .

[0060] Based on the above embodiment, the steel plate 1 is provided with two parallel grooves 12 on one side close to the anchor 5, and the two grooves 12 are respectively located on both sides of the first hole 11;

[0061] The groove 12 is used to place the moving cushion block 2 and limit the moving cushion block 2 so that the moving cushion block 2 can move in the groove 12 .

[0062] Based on the above embodiment, four triangular prisms 3 are provided, and two of them form a pair of triangular prisms 3 , wherein a pair of triangular prisms 3 is located on the same groove 12 .

[0063] Based on the above embodiments, any pair of triangular prisms 3 are symmetrically placed on the groove 12 and maintain a gap. The jack 4 is located in the gap and connects a pair of triangular prisms 3. The top edges and inclined surfaces of the four triangular prisms 3 form a trapezoidal body and are located in the trapezoidal body cavity of the steel pad 1, and the inclined surfaces of the four triangular prisms 3 are all in contact with the bottom surface of the moving pad 2.

[0064] Based on the above embodiments, the telescopic rod of the jack 4 is parallel to the groove 12, and the telescopic rod controls a pair of triangular prisms 3 to retract or move away on the groove 12. Specifically, the two jacks 4 simultaneously control the two pairs of triangular prisms 3 to retract or move away on the groove 12, thereby realizing the descent and lifting of the mobile pad 2.

[0065] Based on the above embodiment, a protective cover 6 is also included. The protective cover 6 is arranged on the top of the anchor 5, and the bottom edge of the anchor 5 is welded to the steel pad 1 to protect the internal anchor 5 and the triangular prism 3.

[0066] Installation method:

[0067] See also Figure 5 During on-site installation, first place the steel pad 1 on the slope, then fix the jack 4 and a pair of triangular prisms 3 together, and set the triangular prisms 3 to the initial distance. It should be noted that the initial distance between the triangular prisms 3 needs to be calculated based on the preset prestress of the anchor cable 7 and the initial length of the anchor cable 7. After placing the triangular prisms 3 in the corresponding grooves 12 of the steel pad 1 (the positions where the two pairs of triangular prisms 3 are placed should be flush), place the movable pad 2 above the triangular prisms 3, directly contacting the inclined surface of the triangular prisms 3, and then the anchor cable 7 passes through the first hole 11 and the second hole 21 in turn, and the anchor cable 7 is fixed by the anchor 5. Finally, the protective cover 6 is placed on the outside of the anchor 5, and its bottom is welded to the steel pad 1.

[0068] Embodiment 2:

[0069] like Figure 6 , Figure 7As shown, this embodiment provides a method for real-time reinforcement of anchor cable prestressing, comprising:

[0070] In daily monitoring work, when the landslide occurs and causes the prestress of the anchor cable to change, the prestress required for the anchor cable and the moving length of the triangular prism can be calculated by reading the thrust value displayed by the jack, and the anchor cable can be tightened and restored to the preset prestress by moving the triangular prism. The specific implementation method is as follows:

[0071] S1. Obtain the thrust value displayed by the jack in real time and determine the inclination angle θ between the triangular prism and the steel pad;

[0072] In this embodiment, since the four triangular prisms are subjected to the same force, one triangular prism is taken as the analysis object to obtain the thrust (ie, thrust value P) applied by the jack thereto.

[0073] S2. Calculate the required prestress of the anchor cable according to the thrust value displayed by the jack and the inclination angle between the triangular prism and the horizontal plane;

[0074] Specifically, step S2 includes:

[0075] S21. Obtaining a first friction coefficient μ1 between the triangular prism and the steel pad, and a second friction coefficient μ2 between the triangular prism and the moving pad;

[0076] S22. When the prism and the moving pad are in equilibrium and stationary, a force balance equation is established based on the first friction coefficient, the second friction coefficient, the thrust value displayed by the jack, and the inclination angle between the triangular prism and the horizontal plane. Specifically, the balance equation is as follows:

[0077] (P-μ1F)cosθ=F sinθ+[F cosθ+(P-μ1F)sinθ]μ2;

[0078] Where F is the support reaction force of the bottom steel plate on a triangular prism.

[0079] S23. Based on the force balance equation, the counterforce F of the steel plate on the triangular prism is calculated;

[0080]

[0081] S24. Calculate the current prestress F of the anchor cable according to the counterforce m ;

[0082] F m =4F;

[0083] S25. Determine the required prestress of the anchor cable based on the current prestress and the preset prestress of the anchor cable.

[0084] ΔF=F m -F0;

[0085] In the formula, ΔF represents the prestress to be supplied, and F0 represents the preset prestress.

[0086] S3. The strain of the anchor cable is calculated based on the required prestress of the anchor cable. Specifically,

[0087]

[0088] Where E is the elastic modulus of the anchor cable; A is the cross-sectional area of ​​the anchor cable.

[0089] S4. Obtaining the initial length of the anchor cable, and calculating the length of the triangular prism to be moved according to the initial length of the anchor cable and the inclination angle between the triangular prism and the horizontal plane;

[0090] Specifically, step S4 includes:

[0091] S41. Calculate the current length of the anchor cable based on the strain and initial length of the anchor cable;

[0092]

[0093] Where l represents the current length of the anchor cable, and l0 represents the initial length of the anchor cable.

[0094] S42. Calculate the length difference of the anchor cable by calculating the initial length and the current length of the anchor cable, i-i;

[0095] S43. Establishing the trigonometric function relationship between the inclination angle of the triangular prism and the horizontal plane, the difference in length of the anchor cable, and the length of the triangular prism to be moved;

[0096]

[0097] Where Δx represents the length of the triangular prism of the anchor cable to be moved.

[0098] S44. Calculate the length of the triangular prism to be moved based on the trigonometric function relationship:

[0099]

[0100] S5. Control the telescopic rod of the jack to extend each triangular prism along the groove to the length to be moved, so that the moving pad and the anchor move upward and stretch the anchor cable.

[0101] Specifically, step S5 includes:

[0102] S51. The telescopic rod of the jack pushes the four triangular prisms outward along the groove to the length to be moved;

[0103] S52. While the four triangular prisms move outward along the groove and the inclined surface of the triangular prism, the four triangular prisms are lifted upward to move the anchor upward;

[0104] S53. While the anchor is moving, the anchor cable is stretched upward so that the prestress value of the anchor cable reaches the preset prestress.

[0105] Embodiment 3:

[0106] Corresponding to the above method embodiment, this embodiment also provides an anchor prestressed real-time reinforcement device, and the anchor prestressed real-time reinforcement device described below and the anchor prestressed real-time reinforcement method described above can refer to each other.

[0107] Figure 8 FIG. 8 is a block diagram of an anchor cable prestressing real-time reinforcement device 800 according to an exemplary embodiment. Figure 8 As shown, the anchor cable prestressed real-time reinforcement device 800 may include: a processor 801 and a memory 802. The anchor cable prestressed real-time reinforcement device 800 may also include one or more of a multimedia component 803, an I / O interface 804, and a communication component 805.

[0108] The processor 801 is used to control the overall operation of the anchor cable prestressing real-time reinforcement device 800 to complete all or part of the steps in the above-mentioned anchor cable prestressing real-time reinforcement method. The memory 802 is used to store various types of data to support the operation of the anchor cable prestressing real-time reinforcement device 800, and these data may include, for example, instructions for any application or method operating on the anchor cable prestressing real-time reinforcement device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 802 or sent via the communication component 805. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 804 provides an interface between the processor 801 and other interface modules, and the above-mentioned other interface modules can be keyboards, mice, buttons, etc. These buttons can be virtual buttons or physical buttons. The communication component 805 is used for wired or wireless communication between the anchor cable prestressed real-time reinforcement device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G or 4G, or a combination of one or more of them, so the corresponding communication component 805 can include: Wi-Fi module, Bluetooth module, NFC module.

[0109] In an exemplary embodiment, the anchor cable prestressed real-time reinforcement device 800 can be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, referred to as ASIC), digital signal processors (Digital Signal Processor, referred to as DSP), digital signal processing devices (Digital Signal Processing Device, referred to as DSPD), programmable logic devices (Programmable Logic Device, referred to as PLD), field programmable gate arrays (Field Programmable Gate Array, referred to as FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned anchor cable prestressed real-time reinforcement method.

[0110] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned anchor prestressing real-time reinforcement method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 802 including program instructions, and the above-mentioned program instructions can be executed by the processor 801 of the anchor prestressing real-time reinforcement device 800 to complete the above-mentioned anchor prestressing real-time reinforcement method.

[0111] Embodiment 4:

[0112] Corresponding to the above method embodiment, a readable storage medium is also provided in this embodiment. The readable storage medium described below and the anchor cable prestressed real-time reinforcement method described above can refer to each other.

[0113] A readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the anchor cable prestressing real-time reinforcement method of the above method embodiment.

[0114] The readable storage medium may specifically be a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or other readable storage medium that can store program codes.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0116] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A prestressed real-time reinforcement device for an anchor cable (7), characterized in that: include: A steel backing plate (1) in contact with the slope, wherein a first hole (11) is vertically arranged in the middle of the steel backing plate (1); A moving pad (2), the moving pad (2) being located above the steel pad (1), and a trapezoidal cavity being provided on a side of the moving pad (2) close to the steel pad (1), the trapezoidal cavity accommodating at least a pair of triangular prisms (3), the inclined surfaces of the triangular prisms (3) being in direct contact with the inclined surfaces of the trapezoidal cavity provided on the moving pad (2); the pair of triangular prisms (3) being connected by a jack (4), and a second hole (21) being on the same center line as the first hole (11) being further provided in the middle of the moving pad (2); An anchor (5), the anchor (5) being arranged on the end surface of the movable pad (2) away from the steel pad (1); An anchor cable (7), one end of which is arranged inside the slope, and the other end of which passes through the first hole (11) and the second hole (21) in sequence to be fixedly connected to the anchor (5).

2. The anchor cable (7) prestressed real-time reinforcement device according to claim 1 is characterized in that: Two parallel grooves (12) are provided on one side of the steel pad (1) close to the anchor (5), and the two grooves (12) are respectively located on both sides of the first hole (11).

3. The anchor cable (7) prestressed real-time reinforcement device according to claim 2 is characterized in that: Four triangular prisms (3) are provided, and two of them form a pair of triangular prisms (3), wherein the pair of triangular prisms (3) are located on the same groove (12).

4. The anchor cable (7) prestressed real-time reinforcement device according to claim 3 is characterized in that: Any pair of triangular prisms (3) are symmetrically placed on the groove (12) and maintain a gap, the top edges and inclined surfaces of the four triangular prisms (3) form a trapezoidal body and are located in the trapezoidal body cavity of the steel pad (1), and the inclined surfaces of the four triangular prisms (3) are in contact with the bottom surface of the moving pad (2).

5. The anchor cable (7) prestressed real-time reinforcement device according to claim 2 is characterized in that: The telescopic rod of the jack (4) is parallel to the groove (12), and the telescopic rod controls a pair of triangular prisms (3) to move together or apart on the groove (12).

6. The anchor cable (7) prestressed real-time reinforcement device according to claim 1, characterized in that: It also comprises a protective cover (6), wherein the protective cover (6) is arranged on the top of the anchor (5), and the bottom edge of the anchor (5) is welded to the steel pad (1).

7. A method for real-time reinforcement of anchor cable prestressing, characterized in that: include: Obtain the thrust value displayed by the jack in real time and determine the inclination angle between the triangular prism and the steel pad; The required prestress of the anchor cable is calculated based on the thrust value displayed by the jack and the inclination angle between the triangular prism and the horizontal plane; The strain of the anchor cable is calculated based on the required prestress of the anchor cable; The initial length of the anchor cable is obtained, and the length of the triangular prism to be moved is calculated according to the initial length of the anchor cable and the inclination angle between the triangular prism and the horizontal plane; The telescopic rod of the control jack makes each triangular prism extend along the groove to the length to be moved, so that the moving pad and the anchor move upward and stretch the anchor cable.

8. The method for real-time reinforcement of anchor cable prestressing according to claim 7, characterized in that , the method of calculating the required prestress of the anchor cable according to the thrust value displayed by the jack and the inclination angle between the triangular prism and the horizontal plane includes: Obtaining a first friction coefficient between the triangular prism and the steel pad, and a second friction coefficient between the triangular prism and the moving pad; When the prism and the moving pad are in equilibrium and stationary, a force balance relationship is established based on the first friction coefficient, the second friction coefficient, the thrust value displayed by the jack, and the inclination angle between the triangular prism and the horizontal plane; Based on the force balance relationship, the counter-support force of the steel pad on the triangular prism is calculated; Calculate the current prestress of the anchor cable according to the counterforce; The required prestress of the anchor cable is determined based on the current prestress and the preset prestress of the anchor cable.

9. The method for real-time reinforcement of anchor cable prestressing according to claim 7, characterized in that , the length of the triangular prism to be moved is calculated according to the initial length of the anchor cable and the inclination angle between the triangular prism and the horizontal plane, including: The current length of the anchor cable is calculated based on the strain and initial length of the anchor cable; The length difference of the anchor cable is calculated based on the initial length and current length of the anchor cable; Establish a trigonometric function relationship between the inclination angle of the triangular prism and the horizontal plane, the length difference of the anchor cable, and the length of the triangular prism to be moved; The length of the triangular prism to be moved is calculated based on the trigonometric function relationship.

10. The method for real-time reinforcement of anchor cable prestressing according to claim 7, characterized in that , control the telescopic rod of the jack to extend each triangular prism along the groove to the length to be moved, so that the moving pad and the anchor move upward and stretch the anchor cable, including: The telescopic rod of the jack pushes the four triangular prisms outward along the groove to the length to be moved; While the four triangular prisms move outward along the groove and the inclined surface of the triangular prism, the four triangular prisms push upward to make the anchor move upward; As the anchor moves, the anchor cable is stretched upward so that the prestress value of the anchor cable reaches the preset prestress.

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