Energy-absorbing anchor rod performance detection system

Abstract

The utility model discloses an energy-absorbing anchor rod performance detection system which comprises a clamp and a non-contact measurement system, and the clamp is composed of an outer anchor section fixing unit and an anchorage device fixing unit. One end of the outer anchor section fixing unit is connected with an interface plate on one side of the pseudo-power and damper performance test system, the other end of the outer anchor section fixing unit is connected with one end, close to the outer anchor section, of the energy-absorbing anchor rod, and one end of the anchorage device fixing unit is connected with one end, away from the outer anchor section, of the energy-absorbing anchor rod. And the other end of the anchorage device fixing unit is connected with an interface board on the other side of the pseudo-power and damper performance test system. The non-contact measuring system utilizes the non-contact measuring head to precisely measure the deformation of the anchor rod under the condition of mechanical loading, replaces the traditional displacement meter and strain gauge, realizes the dynamic measurement of the displacement of the surface of an object in the deformation process of the anchor rod, and has the advantages of portability, high speed, high precision, easiness in operation and the like. According to the utility model, the clamping piece is arranged in the anchorage device fixing unit to form an anchorage device anchoring effect, so that strong anchoring of an anchor rod in a rock mass is simulated, and conditions required by anchor rod detection are simplified; meanwhile, the outer anchor end is fixedly connected with the outer anchor section fixing unit, a test system directly applies a load to the load plate, the load plate transmits the force to the tray, and the stress characteristics of the anchor rod tray during surrounding rock deformation can be accurately simulated; the test system can detect the ultimate bearing capacity of the anchor rod and obtain the displacement change rule under the dead load effect by changing the load applying speed and grade in cooperation with the non-contact measurement system, and the detection efficiency is higher.

Description

Technical Field

[0001] The utility model relates to an energy-absorbing anchor performance detection system, belonging to the field of engineering detection equipment. Background Art

[0002] Traditionally, when testing the pull-out bearing capacity of anchor rods, the outer anchor end of the anchor rod is connected to the testing device after the anchor rod is buried in the rock mass. Usually, a through-hole jack and a loading device are combined as an anchor rod pull-out testing device to test the pull-out bearing capacity of the anchor rod, and the outer anchor end of the anchor rod is connected to the through-hole jack and then loaded. The anchor rod is buried in a complicated way, and the fixing point of the anchor rod jack is prone to loosening, which affects the efficiency of the anchor rod bearing capacity testing.

[0003] In view of this, the present utility model is proposed. Summary of the invention

[0004] The utility model provides an energy-absorbing anchor performance testing system, which provides effective support for realizing the pull-out bearing capacity testing of the energy-absorbing anchor through the ingenious combination of an outer anchor section fixing unit, an anchor fixing unit, a pseudo-dynamic force, a damper performance testing system and a non-contact measuring system.

[0005] The technical solution of the utility model is:

[0006] A system for detecting performance of an energy-absorbing anchor rod comprises an outer anchor section fixing unit and an anchor fixing unit; one end of the outer anchor section fixing unit is connected to an interface plate on one side of a pseudo-dynamic force and damper performance test system, and the other end of the outer anchor section fixing unit is connected to an end of the energy-absorbing anchor rod close to the outer anchor section; one end of the anchor fixing unit is connected to an end of the energy-absorbing anchor rod away from the outer anchor section, and the other end of the anchor fixing unit is connected to an interface plate on the other side of the pseudo-dynamic force and damper performance test system.

[0007] The outer anchor section fixing unit includes a testing machine connecting plate 1, a prismatic support 2, a fixing plate 3, and a load plate 4; the testing machine connecting plate 1 connected to the interface plate on one side of the pseudo-force and damper performance test system is arranged in a T shape with the fixing plate 3, and the prismatic support 2 is provided at the right angle where the two are connected; the fixing plate 3 and the load plate 4 are arranged in parallel and the load plate 4 can be relatively close to or far away from the fixing plate 3 along the axial direction of the energy absorbing anchor rod, and the load plate 4 is used to be connected to one end of the energy absorbing anchor rod close to the outer anchor section.

[0008] The outer anchor section fixing unit further includes a connecting rod 6 and a bolt sleeve 7. The connecting rod 6 fastened by the bolt sleeve 7 is installed between the fixing plate 3 and the load plate 4 to guide the movement of the load plate 4 along the axial direction of the energy absorbing anchor rod.

[0009] The anchor fixing unit includes a testing machine connecting plate 1, a prismatic support 2, a fixing plate 3, and an anchor fixing plate 5; the testing machine connecting plate 1 connected to the interface plate on the other side of the pseudo-force and damper performance testing system is arranged in a T shape with the fixing plate 3, and the prismatic support 2 is provided at the right angle where the two are connected; the fixing plate 3 and the anchor fixing plate 5 are arranged in parallel, and the anchor fixing plate 5 is relatively close to or far away from the fixing plate 3 along the axial direction of the energy absorbing anchor rod, and the anchor fixing plate 5 cooperates with the clip 8 to achieve connection with the end of the energy absorbing anchor rod away from the outer anchor section.

[0010] The anchor fixing unit further includes a connecting rod 6 and a bolt sleeve 7. The connecting rod 6 fastened by the bolt sleeve 7 is installed between the fixing plate 3 and the anchor fixing plate 5 to guide the movement of the anchor fixing plate 5 along the axial direction of the energy absorbing anchor rod.

[0011] The detection system is used in conjunction with a non-contact measurement system.

[0012] The beneficial effects of the utility model are:

[0013] 1. When using this device, it can be used in conjunction with the pseudo-force and damper performance test system. After the anchor rod is installed, the pseudo-force and damper performance test system is started to apply force to both ends of the rod body. The pseudo-force and damper performance test system can increase the acceleration (force) gradedly to test the pull-out bearing capacity of the anchor rod, and it is stable to use.

[0014] 2. During the testing process of the device, the tester can directly know the current test intensity by observing the data information on the computer supporting the test machine. It is flexible and convenient to use.

[0015] 3. The force of the pseudo-dynamic and damper performance test system is directly applied to the load plate, which transfers the load to the energy-absorbing element, accurately simulating the surrounding rock pressure and the stress state of the energy-absorbing element on the anchor rod under actual working conditions, and the test is accurate.

[0016] 4. The non-contact measurement system uses a binocular camera to electrically connect with a computer. The binocular camera shoots the test sample from different angles to obtain surface speckle or observation point images of the test sample at different angles. The measurement is not limited to a single point, and the deformation can be observed in the entire range. At the same time, the data can be automatically processed after the observation is completed to improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure plane of the utility model;

[0019] Figure 3It is a schematic diagram of the AA section of the utility model;

[0020] Figure 4 It is a BB cross-sectional schematic diagram of the utility model;

[0021] Figure 5 It is a schematic diagram of the multi-viewing angle of the clip structure of the utility model;

[0022] Figure 6 This is a working state diagram of the pull-out bearing capacity of the anchor rod of the utility model;

[0023] Figure 7 It is a schematic diagram of an optional energy-absorbing anchor rod of the utility model;

[0024] The numbers in the figure are: 1-testing machine connecting plate, 2-prismatic support, 3-fixing plate, 4-load plate, 5-anchor fixing plate, 6-connecting rod, 7-bolt sleeve, 8-clamp, 9-energy absorbing anchor rod body, 10-energy absorbing anchor rod energy absorbing element, 11-pseudo-dynamic and damper performance test system interface plate, 12-anchor tray. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments, but the content of the utility model is not limited to the described scope.

[0026] Example 1: Figure 1-7 As shown, a system for detecting the performance of an energy-absorbing anchor rod comprises a fixture and may also comprise a non-contact measurement system, wherein the fixture is composed of an outer anchor section fixing unit and an anchor fixing unit; one end of the outer anchor section fixing unit is connected to an interface plate on one side of a pseudo-dynamic force and damper performance test system, and the other end of the outer anchor section fixing unit is connected to an end of the energy-absorbing anchor rod close to the outer anchor section, one end of the anchor fixing unit is connected to an end of the energy-absorbing anchor rod away from the outer anchor section, and the other end of the anchor fixing unit is connected to an interface plate on the other side of the pseudo-dynamic force and damper performance test system.

[0027] Furthermore, the outer anchor section fixing unit includes a testing machine connecting plate 1, a prismatic support 2, a fixing plate 3, and a load plate 4; the testing machine connecting plate 1 connected to the interface plate on one side of the pseudo-force and damper performance test system and the fixing plate 3 are arranged in a T shape, and the prismatic support 2 is provided at the right angle where the two are connected; the fixing plate 3 and the load plate 4 are arranged in parallel and the load plate 4 can be relatively close to or far away from the fixing plate 3 along the axial direction of the energy absorbing anchor rod, and the load plate 4 is used to be connected to one end of the energy absorbing anchor rod close to the outer anchor section.

[0028] Furthermore, the outer anchor section fixing unit also includes a connecting rod 6 and a bolt sleeve 7. The connecting rod 6 fastened by the bolt sleeve 7 is installed between the fixing plate 3 and the load plate 4 to guide the movement of the load plate 4 along the axial direction of the energy absorbing anchor rod.

[0029] Furthermore, the anchor fixing unit includes a testing machine connecting plate 1, a prismatic support 2, a fixing plate 3, and an anchor fixing plate 5; the testing machine connecting plate 1 connected to the interface plate on the other side of the pseudo-force and damper performance testing system is arranged in a T shape with the fixing plate 3, and the prismatic support 2 is provided at the right angle where the two are connected; the fixing plate 3 and the anchor fixing plate 5 are arranged in parallel and the anchor fixing plate 5 is relatively close to or far away from the fixing plate 3 along the axial direction of the energy absorbing anchor rod, and the anchor fixing plate 5 cooperates with the clip 8 to achieve connection with the end of the energy absorbing anchor rod away from the outer anchor section.

[0030] Furthermore, the anchor fixing unit also includes a connecting rod 6 and a bolt sleeve 7. The connecting rod 6 fastened by the bolt sleeve 7 is installed between the fixing plate 3 and the anchor fixing plate 5 to guide the movement of the anchor fixing plate 5 along the axial direction of the energy absorbing anchor rod.

[0031] Furthermore, the energy absorbing anchor rod adopts a straight energy absorbing anchor rod that cooperates with the energy absorbing anchor rod performance detection system.

[0032] Furthermore, the energy absorbing anchor rod adopts the energy absorbing anchor rod in “A rock burst data acquisition device and early warning system based on anchor rod, CN220101307U”, and other energy absorbing anchor rods may also be adopted. For example, as follows:

[0033] The energy absorbing anchor rod is Figure 7 The energy-absorbing anchor rod shown includes an energy-absorbing anchor rod body 9, wherein at least part of the energy-absorbing anchor rod body 9 is used as an outer anchor section, and the rest is used as an inner anchor section, and an outer anchor section component is installed on the outer anchor section; the inner anchor section of the energy-absorbing anchor rod body 9 is provided with an elastic sleeve sleeved on the outer periphery of a conical head. The elastic sleeve is a through elastic metal variable diameter sleeve, and the inner diameter of the thick end of the elastic sleeve matches the outer diameter of the thick end of the conical head, and a cavity is formed between the thin end of the elastic sleeve 1 and the energy-absorbing anchor rod body 9. The outer anchor section component includes an anchor rod tray 12, an energy-absorbing element 10, a damper washer, and a fixing nut (the load plate 4 on the rod body is arranged in close contact with the anchor rod tray 12) which are sequentially installed on the rod body from the inner anchor section to the outer anchor section. The energy-absorbing element 10 adopts a disc spring group, etc.; the disc spring group is composed of a plurality of pairs of disc springs, and each pair of disc springs is composed of two identical disc spring sheets.

[0034] Optionally, the test machine connection plate 1 of the outer anchor section fixing unit and the anchor fixing unit are both metal plates with circular holes, and the test machine connection plate 1, the prismatic support 2 and the fixing plate 3 are integrally cast. By applying the above technical solution, it can be seen that the test machine connection plate 1 of the outer anchor section fixing unit and the anchor fixing unit can be installed between two interface plates on one side of the pseudo-dynamic and damper performance test system, and the circular holes on the interface plate are aligned with the circular holes on the test machine connection plate 1 and then tightened to connect the two, thereby achieving coordination with the system.

[0035] Optionally, the diameters of the first cylindrical holes opened at the four corners of the fixing plate 3, the load plate 4 and the anchor fixing plate 5 are consistent and match the diameter of the connecting rod 6. When applied to the outer anchor section fixing unit, the connecting rod 6 passes through the cylindrical holes on the load plate 4 and the fixing plate 3 and is fastened by the bolt sleeve 7 to achieve the adjustment of different spacings between the load plate 4 and the fixing plate 3 in the outer anchor section fixing unit; when applied to the anchor fixing unit, the connecting rod 6 passes through the cylindrical holes on the anchor fixing plate 5 and the fixing plate 3 and is fastened by the bolt sleeve 7 to achieve the adjustment of different spacings between the anchor fixing plate 5 and the fixing plate 3 in the anchor fixing unit; by adjusting the spacing, the movement of the pseudo-force and damper performance test system can be coordinated to achieve the pull-out bearing capacity detection of energy-absorbing anchor rods of different lengths.

[0036] Furthermore, a second cylindrical hole is opened at the center of the load plate 4, and a truncated cone-shaped hole coaxial with the second cylindrical hole is opened at the center of the anchor fixing plate 5. Furthermore, the non-contact measurement system adopts a binocular three-dimensional product series, and a binocular camera is arranged on one side of the test anchor rod. The two cameras are used to shoot the tested sample from different angles, and the binocular camera is adjusted to observe the overall shape of the anchor rod, so as to realize the dynamic measurement of the displacement of the anchor rod during the deformation process.

[0037] Furthermore, after the surface of the anchor rod is subjected to speckle treatment and the matching fixture is connected and installed with the test system, a non-contact measurement system is appropriately arranged on one side of the anchor rod.

[0038] The non-contact measurement system adopts a binocular three-dimensional series product, which is composed of a binocular camera and a computer; the two cameras of the binocular camera shoot the measured anchor rod from different angles to obtain the speckle image on the surface of the measured anchor rod; the computer receives the image collected by the binocular camera, and uses the triangulation method to restore the three-dimensional displacement and deformation of the speckle of the measured anchor rod according to the parallax of the corresponding points of the image.

[0039] by Figure 6 The use process of the utility model is described as follows:

[0040] When conducting the pull-out bearing capacity test of the anchor rod, the anchor fixing unit is installed first, and then the outer anchor section fixing unit is installed. The anchor fixing unit is installed as follows: the test machine connection plate 1 of the anchor fixing unit is first connected and installed at the corresponding interface plate of the pseudo-dynamic and damper performance test system. After the inner anchor section rod body passes through the truncated cone hole at the center of the anchor fixing plate 5, the three clips 8 are sequentially placed in the truncated cone hole close to the inner anchor section rod body, and the clips are used to tighten the inner anchor section rod body with a jack to achieve the purpose of self-anchoring. The four connecting rods 6 first pass through the first cylindrical holes at the four corners of the anchor fixing plate 5 in turn, and the connecting rods 6 are connected and fixed to the anchor fixing plate 5 with bolt sleeves 7 on both sides. The connected anchor fixing plate 5 + energy-absorbing anchor rod body is then passed through the first cylindrical holes at the four corners of the fixing plate 3 through the connecting rods 6. The fixing plate 3 is connected to the anchor fixing plate 5 and the inner anchor section rod body with bolt sleeves on both sides to achieve the fixation of the entire anchor fixing unit. Furthermore, the clip 8 is a split design, with three pieces in total. After being placed on the anchor fixing plate 5, it can be regarded as a circular anchor with good self-anchoring performance. After the rod body passes through the central cylindrical hole formed by the clip 8 and the anchor fixing plate 5, the anchor rod is tightened using a through-hole jack to simulate the anchoring of the anchor end in the rock mass.

[0041] The external anchor section fixing unit is installed as follows: the test machine connecting plate 1 of the external anchor section fixing unit is first connected and installed at the corresponding interface plate of the pseudo-dynamic and damper performance test system. After the external anchor section rod body passes through the second cylindrical hole in the center of the load plate 4, the anchor rod tray 12 with metal balls and the energy absorbing element 10 are installed on the external anchor section rod body. The four connecting rods 6 first pass through the second cylindrical holes at the four corners of the load plate 4 in sequence, and the connecting rods 6 are connected and fixed to the load plate 4 with bolt sleeves on both sides. The connected load plate 4 + energy absorbing anchor rod body is then passed through the first cylindrical holes at the four corners of the fixing plate 3 through the connecting rods 6. The fixing plate 3 is connected to the load plate 4 and the external anchor section rod body as a whole with bolt sleeves on both sides to realize the fixation of the external anchor section fixing unit.

[0042] At this point, the device connection is completed. The working principle of this device: by connecting the inner anchor section of the anchor rod with the anchor fixing unit, the anchor state of the anchor rod in the rock body can be simulated; the outer anchor section of the anchor rod is connected to the outer anchor section fixing unit. When the test system is started, the load acts on the load plate 4 to simulate the surrounding rock pressure on the tray when the anchor rod is working. By controlling the loading speed and magnitude of the test system, the purpose of simply and efficiently testing the bearing capacity of the anchor rod can be achieved. Further, the test system cooperates with the non-contact measurement system to detect the displacement change law of the anchor rod under the action of constant load.

[0043] The pseudo-dynamic force and damper performance test system adopts SVT61415 of SERVOTEST; other products may also be adopted as required.

[0044] The non-contact measurement system adopts the XTDIC three-dimensional full-field strain measurement and analysis system; other systems can also be used as needed. The non-contact measurement system uses a non-contact measurement head to accurately measure the deformation of the anchor rod under mechanical loading, replacing the traditional displacement meter and strain gauge to achieve dynamic measurement of the displacement of the object surface during the deformation of the anchor rod. It has the advantages of portability, high speed, high accuracy, and easy operation.

[0045] By applying the above technical solution, it can be known that the utility model can directly test the pull-out bearing capacity of the anchor rod body, and form an anchor anchoring effect through the setting of the clip of the anchor fixing unit, thereby simulating the strong anchoring of the anchor rod in the rock mass, simplifying the conditions required for anchor rod detection; at the same time, the outer anchor end is tightly connected to the outer anchor section fixing unit, and the test system directly applies load on the load plate, which can more accurately simulate the stress characteristics of the anchor rod tray when the surrounding rock is deformed. The test system can detect the ultimate bearing capacity of the anchor rod and obtain the displacement change law under the action of constant load by changing the load application speed and level in conjunction with the non-contact measurement system, and the detection efficiency is higher. At the same time, for energy-absorbing anchor rods, this device can also detect the energy absorption effect of the anchor rod.

[0046] The specific implementation modes of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention.

Claims

1. An energy-absorbing anchor performance detection system, characterized in that: It includes an outer anchor section fixing unit and an anchor fixing unit; one end of the outer anchor section fixing unit is connected to an interface plate on one side of the pseudo-dynamic force and damper performance test system, and the other end of the outer anchor section fixing unit is connected to an end of the energy absorbing anchor rod close to the outer anchor section; one end of the anchor fixing unit is connected to an end of the energy absorbing anchor rod away from the outer anchor section, and the other end of the anchor fixing unit is connected to an interface plate on the other side of the pseudo-dynamic force and damper performance test system.

2. The energy-absorbing anchor performance detection system according to claim 1 is characterized in that: The outer anchor section fixing unit comprises a test machine connection plate (1), a prismatic support (2), a fixing plate (3), and a load plate (4); the test machine connection plate (1) connected to an interface plate on one side of the pseudo-force and damper performance test system and the fixing plate (3) are arranged in a T-shape, and the prismatic support (2) is provided at the right angle where the two are connected; the fixing plate (3) and the load plate (4) are arranged in parallel, and the load plate (4) can be arranged relatively close to or far from the fixing plate (3) along the axial direction of the energy absorbing anchor rod, and the load plate (4) is used to be connected to one end of the energy absorbing anchor rod close to the outer anchor section.

3. The energy-absorbing anchor performance detection system according to claim 2 is characterized in that: The outer anchor section fixing unit also includes a connecting rod (6) and a bolt sleeve (7); the connecting rod (6) fastened by the bolt sleeve (7) is installed between the fixing plate (3) and the load plate (4) to guide the movement of the load plate (4) along the axial direction of the energy absorbing anchor rod.

4. The energy-absorbing anchor performance detection system according to claim 1 is characterized in that: The anchor fixing unit comprises a test machine connecting plate (1), a prismatic support (2), a fixing plate (3), and an anchor fixing plate (5); the test machine connecting plate (1) connected to the interface plate on the other side of the pseudo-force and damper performance test system is arranged in a T-shape with the fixing plate (3), and the prismatic support (2) is provided at the right angle where the two are connected; the fixing plate (3) and the anchor fixing plate (5) are arranged in parallel, and the anchor fixing plate (5) is arranged relatively close to or far away from the fixing plate (3) along the axial direction of the energy absorbing anchor rod, and the anchor fixing plate (5) cooperates with the clip (8) to achieve connection with the end of the energy absorbing anchor rod away from the outer anchor section.

5. The energy-absorbing anchor performance detection system according to claim 4 is characterized in that: The anchor fixing unit further comprises a connecting rod (6) and a bolt sleeve (7); the connecting rod (6) fastened by the bolt sleeve (7) is installed between the fixing plate (3) and the anchor fixing plate (5) to guide the movement of the anchor fixing plate (5) along the axial direction of the energy absorbing anchor rod.

6. The energy-absorbing anchor performance detection system according to claim 1, characterized in that: The detection system is used in conjunction with a non-contact measurement system.

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