Method for testing axial force of anchor cable by anchoring and testing integrated anchorage device

Abstract

The invention discloses a method for testing the axial force of an anchor cable through an anchoring and testing integrated anchorage device, the anchoring and testing integrated anchorage device comprises an anchor ring and a split type clamp used for being installed in an inner hole of the anchor ring, the anchor ring is in an integral circular ring shape, and the split type clamp comprises a plurality of limiting clamps and a plurality of non-limiting clamps; each of the limiting clamp and the non-limiting clamp comprises a vertical sag arc and branch edges located at the two ends of the sag arc, the sag arc is matched with the inner wall of the anchor ring, each branch edge is axially provided with a first notch, the first notches in the branch edges on the two sides form a cable penetrating hole, and the interior of the cable penetrating hole is used for clamping and fixing a cable body through an arc-shaped clamping piece; a test strain gauge is installed at the height center line position of the outer wall of the anchor ring and electrically connected with a data collector through a wire. The axial force borne by the anchor cable can be more accurately tested by monitoring the circumferential strain of the outer wall of the anchor ring, and the device has the advantages of being simple in structure, convenient to operate and reasonable in stress.

Description

Technical Field

[0001] The present invention relates to the technical field of slope anchor cable anchoring, and in particular to a method, system and method for testing the axial force of an anchor cable using an integrated anchor-testing anchor. Background Art

[0002] Prestressed anchor cables are a crucial component of slope support in slope construction. Changes in the axial force of these cables are crucial to slope stability. Therefore, a certain percentage of these cables undergo long-term axial force monitoring, resulting in a limited monitoring range. Currently, the primary method for monitoring anchor cable axial force is to install an axial force meter beneath the traditional anchor to monitor changes in the cable's axial force. However, traditional anchor cable axial force meters typically cost over 1,000 yuan, while slope anchor cables number in the tens of thousands. This is especially true for hydraulic engineering slopes, where tens or even hundreds of thousands of cables can be found. Therefore, the continued use of traditional axial force meters for monitoring is prohibitively expensive.

[0003] In the prior art, Chinese patent document CN112378555 B discloses an intelligent anchor and a method for testing the axial force of an anchor rod. The intelligent anchor comprises a first anchor ring and a second anchor ring, and a first and a second split anchor are installed in the middle of the inner cavity of the first and second anchor rings after assembly. This intelligent anchor has the following problems when used: (1) The non-axisymmetric split anchor and the special protruding lock ear structure result in a linear correlation between the axial force and the hoop strain of the anchor ring, which is greatly affected by the strain test point on the outer wall of the anchor ring; (2) The non-axisymmetry of the split fixture leads to the angle between the split fixture dividing line and the split anchor ring connection interface line, which has a great influence on the annular strain of the split anchor ring. The installation condition has a great influence on the stability of the test anchor rod axial force. (3) The installation direction of the clip will superimpose the asymmetric influence of the split anchor ring and the split furniture, further aggravating the linear correlation and stability of the anchor rod axial force test results.

[0004] Therefore, when implementing anchor rod axial force monitoring through this intelligent anchor device, very high requirements are placed on the measurement point locations of the circumferential strain of the split anchor ring. At the same time, the installation conditions of the split clamp are strictly controlled, and the installation direction of the clip is also strictly required. This will lead to a significant increase in the difficulty of construction during actual on-site construction, and the randomness of the construction and installation will cause high errors in the results. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for testing the axial force of an anchor cable using an integrated anchor-testing anchor device, so as to solve the technical problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides a method for testing the axial force of an anchor cable with an integrated anchor and measurement, adopting an integrated anchor and measurement anchor, the integrated anchor and measurement anchor comprising an anchor ring and a split clamp for being installed in the inner hole of the anchor ring, the anchor ring is an overall circular ring shape, a plurality of limit grooves are evenly distributed in an annular manner on the top of the inner wall of the anchor ring, the split clamp comprises a plurality of limit clamps and a plurality of non-limit clamps, the limit clamps and the non-limit clamps both comprise a vertical vertical arc and split edges at both ends of the vertical arc, the vertical arc matches the inner wall of the anchor ring, the limit clamp is provided with a limit extending outward at the top of the vertical arc The plate, the limiting plate matches the limiting groove, and a first notch is axially arranged on the dividing edge. The first notches on the dividing edge on both sides constitute a cable through hole, and the cable through hole is used to clamp and fix the cable body through an arc-shaped clamp; a test strain gauge is installed at the height midline position of the outer wall of the anchor ring, and the test strain gauge is electrically connected to the data collector through a wire; the method for testing the axial force of the anchor cable is to measure the circumferential strain at the midline position of the outer wall of the anchor ring through the test strain gauge, and construct a relationship function between the circumferential strain at the midline position of the outer wall of the anchor ring and the axial force of the anchor cable, and solve the axial force of the anchor cable by combining the determined relationship function with the circumferential strain of the outer wall of the anchor ring after the anchor is installed.

[0007] The correction coefficient method is used to construct the relationship function between the hoop strain at the center line of the anchor ring outer wall and the axial force of the anchor cable. The formula is as follows: ; (1) Where: F is the anchor cable axial force, is the correction factor, h is the anchor height, E is the elastic modulus of the anchor, R is the outer diameter of the anchor ring, r is the inner diameter of the anchor ring, n is the number of cable roots, is the cone angle of the slope, The annular strain of the outer wall of the anchor ring is obtained by testing the strain gauge.

[0008] The relationship function between the hoop strain at the centerline of the outer wall of the anchor ring and the axial force of the anchor cable is constructed using the pre-calibration coefficient method. The formula is as follows: ; (2) Where: is the calibration coefficient, C is the undetermined coefficient, The annular strain of the outer wall of the anchor ring is obtained by testing the strain gauge.

[0009] The cable hole includes a tapered slope surface and a cylindrical surface connected to the lower end of the tapered slope surface. At least two arc-shaped clips for clamping and fixing the cable body are installed in the cable hole. The arc-shaped clips have a clamping surface and a tapered surface. The clamping surface matches the cable body, and the tapered surface matches the tapered slope surface of the cable hole.

[0010] The anchor ring is at the same height as the split clamp.

[0011] The anchor ring is provided with two limiting grooves, which are arranged diagonally. The limiting clamps include a first limiting clamp and a second limiting clamp, and the non-limiting clamps include a third clamp and a fourth clamp.

[0012] Each of the cable-passing holes is composed of two symmetrical first notches.

[0013] A reserved hole is further provided at the center of the split clamp. The reserved hole is composed of second notches evenly distributed on the limiting clamp and the non-limiting clamp. The reserved hole is used for grouting or inserting the cable body.

[0014] The test strain gauge includes a first test strain gauge and a second test strain gauge. The first test strain gauge is located on the center line of two relatively limiting fixtures, and the second test strain gauge is located on the center line of two relatively non-limiting fixtures.

[0015] A compensation strain gauge is also installed at the midline position of the outer wall height of the anchor ring, and the compensation strain gauge is electrically connected to the data collector through a wire; the compensation strain gauge includes a third compensation strain gauge, and the third compensation strain gauge is located at the joint between adjacent limiting clamps and non-limiting clamps.

[0016] Compared with the prior art, the present invention has the following technical effects: 1. The anchor ring is annular, with vertical inner and outer walls, which makes the anchor ring very stress-resistant. When the inner wall is subjected to relatively uniform radial pressure, the hoop stress of the outer wall is relatively uniform and has a good correlation with the radial stress of the inner wall. The radial stress of the inner wall has a good correlation with the tension of the anchor cable. Therefore, by monitoring the hoop strain of the outer wall of the anchor ring, the axial force of the anchor cable can be tested more accurately.

[0017] 2. The correction coefficient method in the anchor cable axial force test of the integrated anchor test fully combines the geometric shape of the anchor, utilizes the theory of elastic mechanics, and establishes the relationship between the axial force of the anchor cable and the annular strain of the anchor ring. It has the advantages of clear force and sufficient theory. The parameters included in the calculation formula are all the geometric and mechanical parameters of the anchor ring. The parameters are easy and quick to obtain, the calculation method is simple and reliable, and the introduced correction coefficient can accurately correct the relationship, further ensuring the reliability of the calculation results.

[0018] 3. The pre-calibration coefficient method in the anchor-testing integrated anchor test method for anchor cable axial force is based on the correction coefficient method. The linear correlation between the anchor cable axial force and the anchor ring strain is solved by the correction coefficient method. The relationship between the anchor cable axial force and the anchor ring strain is calibrated directly by simulating the stress characteristics of the anchor cable for loading. The calibration coefficient and the unknown coefficient of the linear function are determined. The solution method is clear, the concept is clear, and it is more convenient to use for testing the anchor cable axial force in field applications.

[0019] 4. The cable body is fixed with a split clamp. The split clamp is provided with a cable hole that matches the position of the cable body. Each cable hole is cut into two equal parts, so that the split clamp can be easily installed into the inner hole of the anchor ring.

[0020] 5. After the arc-shaped clamp clamps the cable body, the tapered slope of the cable hole matches the tapered surface of the clamp. Under the tension of the anchor cable, the split clamp separates radially, so that the vertical arc of the split clamp abuts against the inner wall of the anchor ring. The anchor ring forms a good constraint on the split clamp, ensuring that the split clamp and the arc-shaped clamp can reliably clamp the cable body.

[0021] 6. The present invention has good axial symmetry characteristics, and the test results of the anchor rod axial force are extremely stable. The test results have a stronger linear correlation with the annular strain of the outer wall of the anchor ring, and the test results are more accurate. The method of testing the axial force of the anchor cable by the annular strain of the anchor ring is very little affected by the randomness of the construction and installation fixtures and clips. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0023] Figure 1 It is a schematic diagram of the top view structure of the anchor device of the present invention after installation.

[0024] Figure 2 It is a schematic diagram of the top structure of the anchor ring of the present invention.

[0025] Figure 3 It is a schematic diagram of the top structure of the split clamp of the present invention.

[0026] Figure 4 Schematic diagram of the top structure of the third clamp and the fourth clamp of the present invention.

[0027] Figure 5 It is a schematic top view of the first limiting clamp and the second limiting clamp of the present invention.

[0028] Figure 6 This is a bottom view of the first and second position limiting clamps of the present invention.

[0029] Figure 7for Figure 2 Middle AA section view.

[0030] Figure 8 for Figure 2 Middle BB cross-section.

[0031] Figure 9 for Figure 4 Schematic diagram of the front view structure.

[0032] Figure 10 for Figure 4 Schematic diagram of the right view structure.

[0033] Figure 11 for Figure 5 Schematic diagram of the left view structure.

[0034] Figure 12 for Figure 5 Schematic diagram of the front view structure.

[0035] Figure 13 This is a schematic diagram of the top view of the installation structure of the arc-shaped clip of the present invention.

[0036] Figure 14 for Figure 13 Cross-section of the CC.

[0037] Figure 15 Schematic diagram of the structure of the test system of the present invention.

[0038] Figure 16 Schematic diagram of the structure of the test system of the present invention.

[0039] Reference numerals: Anchor ring 100, limiting groove 101, inner hole 102, inner wall 103, outer wall 104; Split clamp 110, first limiting clamp 111, second limiting clamp 112, third clamp 113, fourth clamp 114, vertical arc 115, dividing edge 116, cable hole 117, reserved hole 118, limiting plate 119, tapered slope surface 120, cylindrical surface 121, arc-shaped clamping piece 122, first clamping piece 123, second clamping piece 124, clamping surface 125, tapered surface 126; A first test strain gauge 130 , a second test strain gauge 131 , a third compensation strain gauge 132 , a data collector 133 , a wire 134 , and a cable body 135 . DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] Example 1: See also Figure 1-16 , a method for testing the axial force of an anchor cable with an integrated anchor and measurement, adopting an integrated anchor and measurement, the integrated anchor and measurement comprises an anchor ring 100 and a split clamp 110 for being installed in the inner hole 102 of the anchor ring, the anchor ring 100 is an overall circular ring shape, and a plurality of limiting grooves 101 are evenly distributed in an annular manner on the top of the inner wall 103 of the anchor ring 100, the split clamp 110 comprises a plurality of limiting clamps and a plurality of non-limiting clamps, the limiting clamps and the non-limiting clamps both comprise a vertical droop 115 and a dividing edge 116 at both ends of the droop 115, the droop 115 matches the inner wall of the anchor ring 100, the limiting clamp is provided with a limiting plate 119 extending outward at the top of the droop 115, the limiting plate 119 Matching the limiting groove 101, a first notch is axially arranged on the dividing edge 116, and the first notch on the dividing edge 116 on both sides constitutes a cable hole 117, and the cable hole 117 is used to clamp the fixed cable body 135 through the arc-shaped clamping piece 122; a test strain gauge is installed at the height midline position of the outer wall 104 of the anchor ring 100, and the test strain gauge is electrically connected to the data collector 133 through a wire 134; the method for testing the axial force of the anchor cable is to measure the circumferential strain at the midline position of the outer wall 104 of the anchor ring 100 through the test strain gauge, construct a relationship function between the circumferential strain at the midline position of the outer wall 104 of the anchor ring 100 and the axial force of the anchor cable, and solve the axial force of the anchor cable by combining the determined relationship function with the circumferential strain of the outer wall of the anchor ring after the anchor is installed.

[0042] In one of the solutions, a correction coefficient method is used to construct a relationship function between the circumferential strain at the centerline of the outer wall 104 of the anchor ring 100 and the axial force of the anchor cable, and the formula is as follows: ; (1) Where: F is the anchor cable axial force, is the correction factor, h is the anchor height, E is the elastic modulus of the anchor, R is the outer diameter of the anchor ring, r is the inner diameter of the anchor ring, n is the number of cable roots, is the cone angle of the slope, The annular strain of the outer wall of the anchor ring is obtained by testing the strain gauge.

[0043] When applying formula (1) for calculation, the correction coefficient is first measured in the laboratory. The axial force of the anchor cable is calculated based on the obtained anchor ring parameters, split fixture parameters, and the tested annular strain of the outer wall of the anchor ring. The result is compared with the actual tension to obtain the value of the correction coefficient. The method for determining the value of the correction coefficient is clarified. Then, the axial force of the anchor cable can be directly tested based on the annular strain of the outer wall of the anchor ring according to formula (1).

[0044] In another solution, a pre-calibrated coefficient method is used to construct a relationship function between the circumferential strain at the centerline of the outer wall 104 of the anchor ring 100 and the axial force of the anchor cable, and the formula is as follows: ; (2) Where: is the calibration coefficient, C is the undetermined coefficient, The annular strain of the outer wall of the anchor ring is obtained by testing the strain gauge.

[0045] When applying formula (2) for calculation, the anchor-test integrated anchor is loaded and tested indoors by simulating the anchor cable stress. At the same time, the hoop stress of the anchor ring outer wall is tested under no load. In this way, the relationship between the anchor cable axial force and the hoop strain of the anchor ring outer wall is established, and a linear function fitting is performed to determine the calibration coefficient. and the undetermined coefficient C. After the anchor is installed, the axial force of the anchor cable can be calculated based on the tested hoop strain of the outer wall of the anchor ring using the formula (2) after calibration coefficient.

[0046] The anchor ring 100 is in the shape of an entire ring, and the inner wall 103 and the outer wall 104 are both perpendicular to the top end face and the bottom end face, so that the anchor ring 100 is very well stressed. When the inner wall 103 is subjected to relatively uniform radial pressure, the hoop stress of the outer wall 104 is relatively uniform and has a good correlation with the radial stress of the inner wall 103. The radial stress of the inner wall 103 has a good correlation with the tension of the cable body 135. Therefore, by monitoring the hoop strain of the outer wall 104 of the anchor ring 100, the axial force exerted on the cable body 135 can be tested more accurately.

[0047] A limiting plate 119 is installed in the limiting groove 101 to limit the position of the split clamp 110 and prevent circumferential displacement of the split clamp 110. The cable body 135 is fixed by the split clamp 110. The split clamp 110 is provided with a cable hole 117 that matches the position of the cable body, allowing the split clamp to be easily installed in the inner hole 102 of the anchor ring 100.

[0048] See also Figure 9-12 The cable hole 117 includes a tapered slope surface 120 and a cylindrical surface 121 connected to the lower end of the tapered slope surface 120. At least two arc-shaped clips 122 for clamping and fixing the cable body 135 are installed in the cable hole 117. The arc-shaped clip 122 has a clamping surface 125 and a tapered surface 126. The clamping surface 125 matches the cable body 135, and the tapered surface 126 matches the tapered slope surface 120 of the cable hole 117.

[0049] After the arc-shaped clamping piece 122 clamps the cable body 135, under the action of the tension of the anchor cable, the split clamp 100 separates radially, so that the vertical arc 115 of the split clamp 110 presses against the inner wall 103 of the anchor ring. The anchor ring 100 forms a good constraint on the split clamp 110, ensuring that the split clamp 110 and the arc-shaped clamping piece 122 form a reliable clamping of the anchor cable.

[0050] Specifically, the anchor ring 100 and the split clamp 110 have the same height.

[0051] In this embodiment, see Figure 1-8 The anchor ring 100 is provided with two limiting grooves 101, which are arranged diagonally. The limiting clamps include a first limiting clamp 111 and a second limiting clamp 112, and the non-limiting clamps include a third clamp 113 and a fourth clamp 114. The two limiting clamps and the two non-limiting clamps are arranged symmetrically, so that the force on the anchor ring 100 is more uniform.

[0052] Each of the cable holes 117 is composed of two symmetrical first notches, so that the force on the anchor ring 100 is more uniform.

[0053] A reserved hole 118 is also provided at the center of the split clamp 110. The reserved hole 118 is formed by second notches evenly distributed on the limiting clamp and the non-limiting clamp. The reserved hole 118 is used for grouting or for inserting the cable body 135. When the reserved hole 118 is used to insert the cable body 135, its structure is the same as that of the cable insertion hole 117.

[0054] See also Figure 1 、 3 , 13, 14, each cable hole 117 is provided with two arc-shaped clips 122 for clamping and fixing the cable body 135, namely a first clip 123 and a second clip 124. The first clip 123 and the second clip 124 are both wedge-shaped semicircular arc structures.

[0055] See also Figure 15 、 16 The test strain gauge includes a first test strain gauge 130 and a second test strain gauge 131. The first test strain gauge 130 is located on the center line of two relative limit clamps, and the second test strain gauge 131 is located on the center line of two relative non-limit clamps. Using two test strain gauges, the average value can be taken during the test, or an abnormal value can be eliminated, further improving the accuracy of the anchor cable axial force measurement. The installation positions of the first test strain gauge 130 and the second test strain gauge 131 are determined, see Figure 15The angle between the first test strain gauge 130 and the second test strain gauge 131 is 90°, and the first test strain gauge 130 is aligned with the center line of the two relative limiting fixtures, and the second test strain gauge 131 is aligned with the center line of the two non-limiting fixtures, so that the hoop strain of the anchor ring can be detected more accurately.

[0056] A compensating strain gauge is also bonded and installed at the midline position of the outer wall height of the anchor ring 100, and the compensating strain gauge is electrically connected to the data collector 133 through a wire 134; the compensating strain gauge includes a third compensating strain gauge 132, and the third compensating strain gauge 132 is located at the joint between the adjacent limiting clamps and the non-limiting clamps. The compensating strain gauge is used to balance the deviation of the test strain gauge affected by temperature.

[0057] In this embodiment, the first test strain gauge 130 and the second test strain gauge 131 are respectively bonded to the outer wall of the anchor ring in a transverse direction, and the third compensation strain gauge 132 is located between the first test strain gauge 130 and the second test strain gauge 131 . The third compensation strain gauge 132 is bonded to the outer wall of the anchor ring in a longitudinal direction.

[0058] The present invention has good axial symmetry characteristics, and the test results of the anchor rod axial force are extremely stable. The test results have a stronger linear correlation with the annular strain of the outer wall of the anchor ring, and the test results are more accurate. The method of testing the anchor rod axial force by the annular strain of the anchor ring is very little affected by the randomness of the construction and installation fixtures and clips.

Claims

1. A method for testing the axial force of an anchor cable using an integrated anchor-testing anchor, characterized in that: An anchoring and measuring integrated anchor is adopted, and the anchoring and measuring integrated anchor comprises an anchor ring (100) and a split clamp (110) for being installed in an inner hole (102) of the anchor ring, wherein the anchor ring (100) is in an overall annular shape, and a plurality of limiting grooves (101) are evenly distributed in an annular manner on the top of the inner wall (103) of the anchor ring (100), and the split clamp (110) comprises a plurality of limiting clamps and a plurality of non-limiting clamps, and the limiting clamps and the non-limiting clamps both comprise a vertical vertical arc (115) and a dividing edge (116) located at both ends of the vertical arc (115), the vertical arc (115) matches the inner wall of the anchor ring (100), and the limiting clamp is provided with a limiting plate (119) extending outward at the top of the vertical arc (115), and the limiting plate (119) and the limiting groove (101) are in contact with each other. The first notches are axially arranged on the side edges (116), and the first notches on the side edges (116) on both sides constitute cable holes (117), and the cable holes (117) are used to clamp and fix the cable body (135) through the arc-shaped clamping piece (122); a test strain gauge is installed at the height midline position of the outer wall (104) of the anchor ring (100), and the test strain gauge is electrically connected to the data acquisition device (133) through the wire (134); the method for testing the axial force of the anchor cable is to measure the circumferential strain at the midline position of the outer wall (104) of the anchor ring (100) through the test strain gauge, construct a relationship function between the circumferential strain at the midline position of the outer wall (104) of the anchor ring (100) and the axial force of the anchor cable, and solve the axial force of the anchor cable by combining the determined relationship function with the circumferential strain of the outer wall of the anchor ring after the anchor is installed.

2. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: The correction coefficient method is used to construct the relationship function between the circumferential strain at the center line of the outer wall (104) of the anchor ring (100) and the axial force of the anchor cable, and the formula is as follows: ；（1） Where: F is the anchor cable axial force, is the correction factor, h is the anchor height, E is the elastic modulus of the anchor, R is the outer diameter of the anchor ring, r is the inner diameter of the anchor ring, n is the number of cable roots, is the cone angle of the slope, The annular strain of the outer wall of the anchor ring is obtained by testing the strain gauge.

3. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: The relationship function between the circumferential strain at the centerline position of the outer wall (104) of the anchor ring (100) and the axial force of the anchor cable is constructed by using the pre-calibrated coefficient method. The formula is as follows: ；（2） Where: is the calibration coefficient, C is the unknown coefficient, The annular strain of the outer wall of the anchor ring is obtained by testing the strain gauge.

4. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: The cable hole (117) comprises a tapered slope surface (120) and a cylindrical surface (121) connected to the lower end of the tapered slope surface (120). At least two arc-shaped clips (122) for clamping and fixing the cable body (135) are installed in the cable hole (117). The arc-shaped clips (122) have a clamping surface (125) and a tapered surface (126). The clamping surface (125) matches the cable body (135), and the tapered surface (126) matches the tapered slope surface (120) of the cable hole (117).

5. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: The anchor ring (100) and the split clamp (110) have the same height.

6. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: The anchor ring (100) is provided with two limiting grooves (101), the two limiting grooves (101) are arranged diagonally, the limiting clamps include a first limiting clamp (111) and a second limiting clamp (112), and the non-limiting clamps include a third clamp (113) and a fourth clamp (114).

7. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: Each of the cable-through holes (117) is composed of two symmetrical first notches.

8. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: A reserved hole (118) is further provided at the center of the split clamp (110). The reserved hole (118) is formed by second notches evenly distributed on the limiting clamp and the non-limiting clamp. The reserved hole (118) is used for grouting or inserting the cable body (135).

9. The method for testing the axial force of an anchor cable using an integrated anchor-testing anchor according to claim 1, characterized in that: The test strain gauge comprises a first test strain gauge (130) and a second test strain gauge (131), wherein the first test strain gauge (130) is located on the center line of two relative limiting clamps, and the second test strain gauge (131) is located on the center line of two relative non-limiting clamps.

10. The method for testing the axial force of an anchor cable using an integrated anchoring and testing anchor according to claim 1 or 9, characterized in that: A compensating strain gauge is also installed at the midline position of the outer wall height of the anchor ring (100), and the compensating strain gauge is electrically connected to the data collector (133) via a wire (134); the compensating strain gauge includes a third compensating strain gauge (132), and the third compensating strain gauge (132) is located at the joint between adjacent limiting clamps and non-limiting clamps.

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