CN113267564A - Anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration - Google Patents
Anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration Download PDFInfo
- Publication number
- CN113267564A CN113267564A CN202110603908.1A CN202110603908A CN113267564A CN 113267564 A CN113267564 A CN 113267564A CN 202110603908 A CN202110603908 A CN 202110603908A CN 113267564 A CN113267564 A CN 113267564A
- Authority
- CN
- China
- Prior art keywords
- rod
- anchor rod
- anchor
- anchoring
- detection auxiliary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004873 anchoring Methods 0.000 title claims abstract description 93
- 238000009659 non-destructive testing Methods 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 29
- 238000001514 detection method Methods 0.000 claims abstract description 140
- 230000001133 acceleration Effects 0.000 claims abstract description 38
- 230000005284 excitation Effects 0.000 claims description 28
- 238000012360 testing method Methods 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/262—Linear objects
- G01N2291/2626—Wires, bars, rods
Landscapes
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a nondestructive detection device and a nondestructive detection method for anchor rod anchoring parameters based on continuous beam vibration, based on a continuous beam theory, a detection auxiliary rod with a flat end surface and a large diameter is additionally arranged at an exposed section of an anchor rod to be detected, and the length and the sectional area of the exposed section of the anchor rod are increased; when the vibration hammer is adopted to act on the detection auxiliary rod along the axial direction of the detection auxiliary rod, the non-longitudinal clutter generated by the filter structure of the detection auxiliary rod is larger and smoother in sectional area, and can be highly coupled with the acceleration sensor, so that the detection is more convenient, and the result is more accurate; when the vibration hammer is adopted to act on the detection auxiliary rod along the radial direction of the detection auxiliary rod, the detection auxiliary rod increases the transverse deflection degree of the anchor rod exposed end structure and the bending moment of the supporting plate disc, so that the image recognition degree is higher, the detection result is more accurate, and the traditional filtering means and the noise reduction means can be omitted.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to an anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration.
[ background of the invention ]
The anchor rod supporting technology is mature day by day, and the anchor rod nondestructive testing technology is used as a main testing method of the anchor rod anchoring quality in the engineering field, and is also widely applied in the fields of mining and geotechnical engineering gradually, however, the anchor rod nondestructive testing technology still has more problems to be overcome.
On one hand, the exposed end surface of the anchor rod is easy to damage and uneven in the transportation and anchoring processes, and the diameter of the common anchor rod is small, so that the accuracy of a detection result is restricted in the actual detection work; on the other hand, after the anchoring is finished, the exposed section of the anchor rod is possibly short, and the recognizable degree of the waveform obtained by the excitation is low. The above problems lead to difficult operation for the inspector and much clutter in the obtained waveform, unnecessary errors are generated and no physical filtering technology exists at present.
[ summary of the invention ]
The invention provides a nondestructive testing device and a nondestructive testing method for anchor rod anchoring parameters based on continuous beam vibration, and aims to solve the problems in the background art.
The invention is realized by the following technical scheme:
the utility model provides an anchor rod anchor parameter nondestructive test device based on continuous beam vibration, includes:
the anchor rod is arranged in an anchor rod hole on the surrounding rock, one end of the anchor rod is fixed in the anchor rod hole, and the other end of the anchor rod extends out of the anchor rod hole;
the tray is arranged on the exposed section of the anchor rod and is fixed on the surrounding rock by a locking nut;
the detection auxiliary rod is coaxially arranged with the anchor rod and is detachably connected with the exposed section of the anchor rod;
the acceleration sensor is arranged on the detection auxiliary rod, and the axis of the acceleration sensor is parallel to or vertical to the axis of the detection auxiliary rod;
the acquisition analyzer is connected with the acceleration sensor;
and the vibration hammer is used for exciting the detection auxiliary rod along the axial direction or the radial direction of the detection auxiliary rod, acquiring signals through the acceleration sensor and analyzing the signals by the acquisition analyzer so as to detect the anchoring parameters of the anchor rod.
According to the anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration, the wave-blocking gasket is arranged between the auxiliary detection rod and the anchor rod.
According to the anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration, the length of the detection auxiliary rod is 2.5-3.5 times of the exposed section of the anchor rod.
As above an stock anchor parameter nondestructive test device based on continuous beam vibration, it is the cylinder to detect the auxiliary rod, it includes the auxiliary rod body to detect the auxiliary rod, be equipped with the confession in the auxiliary rod body the mounting groove that the stock stretched into, be equipped with the internal thread on the mounting groove inner wall, be equipped with on the stock with internal thread assorted external screw thread.
An anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration comprises the following steps:
step S1: arranging an anchor rod hole on the surrounding rock, extending an anchor rod to be tested into the anchor rod hole, fixing one end of the anchor rod hole by using an anchoring agent, extending the other end of the anchor rod hole out of the anchor rod hole, fixing the anchor rod hole by using a tray, and locking the anchor rod hole by using a locking nut;
step S2: selecting a detection auxiliary rod and installing the detection auxiliary rod on the exposed end of the anchor rod;
step S3: installing an acceleration sensor on the detection auxiliary rod and connecting the acceleration sensor with an acquisition analyzer, ensuring that the axis of the acceleration sensor is parallel to the axis of the detection auxiliary rod, exciting the detection auxiliary rod along the axial direction of the detection auxiliary rod by using an excitation hammer, and acquiring longitudinal vibration signals;
step S4: and analyzing the longitudinal vibration signal acquired in the step S3 by the acquisition analyzer, and detecting the anchoring length of the anchor rod and the anchor rod length.
The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration, which is used for testing the anchoring length of the anchor rod in the step S4, comprises the following steps:
step S401: identifying signal positions of an anchoring initial end and an anchoring end on a oscillogram, and reading out the reflection time t of the anchoring initial end1And the reflection time t of the anchoring end2；
Step S402: experimental measurement of the sectional area A of the anchor rod1Modulus of elasticity E of anchor rod1Anchor density ρ1Wave velocity v of anchor rod1Anchor agent cross-sectional area A2Modulus of elasticity E of the anchoring agent2Anchor density ρ2；
Step S403: calculating the wave velocity c of the anchoring section as
Step S404: calculating the length l of the anchoring section2Is composed of
The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration, which is used for testing the anchor rod length of the anchor rod in the step S4, comprises the following steps:
step S405: calculating the free end length l1Is composed of
Wherein B is a constant associated with the detection assist lever;
step S406: calculating the length l of the anchor rod as
The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration further comprises the following steps:
step S5: installing an acceleration sensor on the detection auxiliary rod and connecting the acceleration sensor with an acquisition analyzer, ensuring that the axis of the acceleration sensor is vertical to the axis of the detection auxiliary rod, and exciting the detection auxiliary rod along the radial direction of the detection auxiliary rod by using an excitation hammer to acquire transverse vibration signals;
step S6: and analyzing the transverse vibration signal acquired in the step S5 by an acquisition analyzer, and detecting the axial force and the anchoring force of the anchor rod.
The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration, which is used for testing the axial force of the anchor rod in the step S6, comprises the following steps:
step S601: the first derivative of the acceleration signal is obtained, and the speed extreme value v is read2；
Step S602: performing time-frequency analysis by using an acquisition analyzer to obtain the first-order vibration circle frequency omega of the structure;
step S603: calculating exciting force FPIs composed of
Fp＝zv2，
Wherein z is the wave impedance of the detection auxiliary rod;
step S604: calculating the axial force F of
Wherein l3The length from the tray to one end of the detection auxiliary rod far away from the anchor rod, and S is the area of the tray; c1～C4Parameters were measured for the experiment;
the anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration, which is used for detecting the anchoring force of the anchor rod in the step S6, comprises the following steps:
step S605: obtaining reflected wave energy R through an acquisition analyzer;
step S606: detecting the first complete debonding displacement u of the anchoring section through experiments0Length of anchoring section l initially debonded to complete debonding4Anchor hole diameter D, anchor resin thickness B, anchor body elastic modulus E2Shear stress tau at debonding of anchoring section0；
Step S607: calculating the anchoring force T of
Wherein A is4Coefficient relating to axial force for bond shear stress, A5Is a coefficient relating bonding stiffness and reflected energy.
Compared with the prior art, the invention has the following advantages:
1. the invention provides an anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration, based on a continuous beam theory, a testing auxiliary rod with a flat end surface and a large diameter is additionally arranged at an exposed section of an anchor rod to be tested, and the length and the sectional area of the exposed section of the anchor rod are increased; when the vibration hammer is adopted to act on the detection auxiliary rod along the axial direction of the detection auxiliary rod, the non-longitudinal clutter generated by the filter structure of the detection auxiliary rod is larger and smoother in sectional area, and can be highly coupled with the acceleration sensor, so that the detection is more convenient, and the result is more accurate; when the vibration hammer is adopted to act on the detection auxiliary rod along the radial direction of the detection auxiliary rod, the detection auxiliary rod increases the transverse deflection degree of the anchor rod exposed end structure and the bending moment at the supporting plate disc, so that the image recognition degree is higher, and the detection result is more accurate;
2. meanwhile, the self stress wave waveform of the detection auxiliary rod is compared and integrated with the stress wave waveform obtained by connecting the detection auxiliary rod with the anchoring anchor rod, so that the physical filtering effect can be achieved, and the nondestructive detection waveform identification process is simpler, more convenient and quicker;
3. according to the method, the axial load of the anchoring system is calculated by using the system vibration fundamental frequency, and the vibration fundamental frequency is positioned more clearly by lengthening the length of the exposed segment, so that the noise reduction step can be omitted.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural diagram of an anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration, provided by the invention;
FIG. 2 is a schematic structural diagram of the anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration;
FIG. 3 is a partial structural view of the auxiliary detection rod according to the present invention;
FIG. 4 is a partial schematic structural view of the joint of the auxiliary detection rod and the anchor rod according to the present invention;
FIG. 5 is a block flow diagram of a nondestructive testing method for anchor rod anchoring parameters based on continuous beam vibration according to the present invention;
FIG. 6 is a vibration exciting diagram of the vibration hammer for exciting the anchor rod in the axial direction of the anchor rod when the auxiliary detection rod is not installed in the present invention;
FIG. 7 is a vibration excitation diagram of the vibration excitation hammer along the axial direction of the anchor rod detection auxiliary rod after the auxiliary detection rod is installed in the present invention;
FIG. 8 is a vibration exciting diagram of the vibration hammer exciting the anchor rod in the radial direction of the anchor rod when the auxiliary detection rod is not installed in the present invention;
fig. 9 is an excitation diagram of the excitation hammer exciting the detection auxiliary rod in the radial direction of the anchor rod detection auxiliary rod after the auxiliary detection rod is installed in the invention.
[ detailed description ] embodiments
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the words are used for distinguishing between them unless the context clearly dictates otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In a specific embodiment, a nondestructive testing device for anchor rod anchoring parameters based on continuous beam vibration as shown in fig. 1 to 9 comprises:
the anchor rod 2 is arranged in an anchor rod hole 11 on the surrounding rock 3, one end of the anchor rod 2 is fixed in the anchor rod hole 11, preferably, the anchor rod is fixed by the anchoring agent 1, and the other end of the anchor rod 2 extends out of the anchor rod hole 11;
the tray 4 is arranged on the exposed section of the anchor rod 2 and is fixed on the surrounding rock 3 by a locking nut 5;
the detection auxiliary rod 7 is coaxially arranged with the anchor rod 2 and is detachably connected with the exposed section of the anchor rod 2;
the acceleration sensor 8 is arranged on the detection auxiliary rod 7, and the axis of the acceleration sensor 8 is parallel to or vertical to the axis of the detection auxiliary rod 7;
the acquisition analyzer 10 is connected with the acceleration sensor 8;
and the vibration hammer 9 is used for exciting the detection auxiliary rod 7 along the axial direction or the radial direction of the detection auxiliary rod 7, acquiring signals through the acceleration sensor 8 and analyzing the signals by the acquisition analyzer 10 so as to detect anchor rod anchoring parameters. Based on the continuous beam theory, a detection auxiliary rod with a flat end surface and a large diameter is additionally arranged on the exposed section of the anchor rod to be detected, and the length and the sectional area of the exposed section of the anchor rod are increased; when the vibration hammer is adopted to act on the detection auxiliary rod along the axial direction of the detection auxiliary rod, the non-longitudinal clutter generated by the filter structure of the detection auxiliary rod is larger and smoother in sectional area, and can be highly coupled with the acceleration sensor, so that the detection is more convenient, and the result is more accurate; when the vibration hammer acts on the detection auxiliary rod along the radial direction of the detection auxiliary rod, the detection auxiliary rod increases the transverse deflection degree of the anchor rod exposed end structure and the bending moment of the supporting plate disc, so that the image recognition degree is higher, and the detection result is more accurate.
Specifically, a wave-damping gasket 6 is arranged between the detection auxiliary rod 7 and the anchor rod 2. The noise wave except the longitudinal stress wave can be blocked from passing through when the vibration hammer 9 is adopted to carry out axial vibration excitation along the detection auxiliary rod 7.
In addition, the length of the detection auxiliary rod 7 is 2.5-3.5 times, preferably 3 times, of the exposed section of the anchor rod 2, and the data detected by adopting the proportion is most accurate and stable.
Further, it is the cylinder to detect auxiliary rod 7, it includes the auxiliary rod body 71 to detect auxiliary rod 7, be equipped with the confession in the auxiliary rod body 71 the mounting groove 72 that stock 2 stretched into, be equipped with internal thread 12 on the mounting groove 72 inner wall, be equipped with on stock 2 with internal thread 12 assorted external screw thread 11, demountable installation, the change of being convenient for, moreover detect auxiliary rod 7 and be the cylinder for adopt the exciting vibration hammer 9 along detecting when auxiliary rod 7 axial or radial excitation detects auxiliary rod 7, need not to consider the turned angle who produces the data deviation because of detecting difference when auxiliary rod 7 installs, make the detection data more stable.
The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration as shown in figures 1-9 comprises the following steps:
step S1: an anchor rod hole 11 is formed in the surrounding rock 3, an anchor rod 2 to be tested extends into the anchor rod hole 11, one end of the anchor rod is fixed by an anchoring agent 1, the other end of the anchor rod extends out of the anchor rod hole 11 and is fixed by a tray 4, and the anchor rod is locked by a locking nut 5;
step S2: selecting a detection auxiliary rod 7 and installing the detection auxiliary rod on the exposed end of the anchor rod 2;
step S3: installing an acceleration sensor 8 on a detection auxiliary rod 7 and connecting the acceleration sensor with an acquisition analyzer 10, ensuring that the axis of the acceleration sensor 8 is parallel to the axis of the detection auxiliary rod 7, exciting the detection auxiliary rod 7 along the axial direction of the detection auxiliary rod 7 by using an excitation hammer 9, and acquiring longitudinal vibration signals;
step S4: the longitudinal vibration signal collected in step S3 is analyzed by the collection analyzer 10, and the anchoring length of the anchor 2 and the anchor length are detected.
The method is characterized in that a new method is provided for comprehensively detecting anchoring parameters, based on the continuous beam theory, a detection auxiliary rod with a flat end surface and a large diameter is additionally arranged at the exposed section of the anchor rod to be detected, the length and the sectional area of the exposed section of the anchor rod are increased, compared with the prior art, test data obtained after the detection auxiliary rod is added can save the previous filtering means, the physical properties such as the waveform, the wave speed and the like of the detection auxiliary rod are known, and the known waveform corresponding to the excitation condition can be obtained through pre-excitation; a group of waveform diagrams called 'waveform diagram 1' are obtained by attenuating a known periodic reflection waveform from the auxiliary rod to the section of the exposed section with an equal proportionality coefficient. And (3) carrying out axial excitation on the end face of the detection auxiliary rod to obtain a reflection waveform of the anchoring system, namely a waveform diagram 2. Subtracting the known waveform diagram 1 from the obtained waveform diagram 2 to obtain a waveform diagram 3 which does not contain the reflected signal of the exposed section, namely a physical filtering means;
compared with the prior art, the vibration excitation hammer can complete vibration excitation in the axial direction and the transverse direction of the detection auxiliary rod, different vibration excitation means are adopted for different detection purposes, when the vibration excitation hammer acts on the detection auxiliary rod along the axial direction of the detection auxiliary rod, non-longitudinal clutter generated by a filter structure of the detection auxiliary rod is detected, and the detection auxiliary rod is larger in sectional area and more flat and can be highly coupled with an acceleration sensor, so that the detection is more convenient, and the result is more accurate; when the vibration hammer acts on the detection auxiliary rod along the radial direction of the detection auxiliary rod, the detection auxiliary rod increases the transverse deflection degree of the anchor rod exposed end structure and the bending moment of the supporting plate disc, so that the image recognition degree is higher, and the detection result is more accurate.
More specifically, the step S4 of detecting the anchoring length of the anchor rod 2 includes the following steps:
step S401: identifying signal positions of an anchoring initial end and an anchoring end on a oscillogram, and reading out the reflection time t of the anchoring initial end1And the reflection time t of the anchoring end2；
Step S402: experimental measurement of the sectional area A of the anchor rod1Modulus of elasticity E of anchor rod1Anchor density ρ1Wave velocity v of anchor rod1Anchor agent cross-sectional area A2Modulus of elasticity E of the anchoring agent2Anchor density ρ2；
Step S403: calculating the wave velocity c of the anchoring section as
Step S404: calculating the length l of the anchoring section2Is composed of
Further, the step S4 of detecting the bolt length of the bolt 2 includes the following steps:
step S405: calculating the free end length l1Is composed of
Wherein B is a constant associated with the detection auxiliary lever 7;
step S406: calculating the length l of the anchor rod as
Still further, an anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration further comprises the following steps:
step S5: installing an acceleration sensor 8 on a detection auxiliary rod 7 and connecting the acceleration sensor with an acquisition analyzer 10, ensuring that the axis of the acceleration sensor 8 is vertical to the axis of the detection auxiliary rod 7, exciting the detection auxiliary rod 7 along the radial direction of the detection auxiliary rod 7 by using an excitation hammer 9, and acquiring transverse vibration signals;
step S6: the transverse vibration signal collected in step S5 is analyzed by the collection analyzer 10, and the axial force and anchoring force of the anchor 2 are detected.
Specifically, the step S6 of detecting the axial force of the anchor rod 2 includes the following steps:
step S601: the first derivative of the acceleration signal is obtained, and the speed extreme value v is read2；
Step S602: performing time-frequency analysis by using the acquisition analyzer 10 to obtain a first-order vibration circle frequency omega of the structure;
step S603: calculating exciting force FPIs composed of
Fp＝zv2，
Wherein z is the 7 wave impedance of the detection auxiliary rod;
step S604: calculating the axial force F of
Wherein l3The length from the tray 4 to one end of the detection auxiliary rod 7 far away from the anchor rod 2, and S is the area of the tray 4; c1～C4Parameters were measured for the experiment; .
More specifically, the step S6 of detecting the anchoring force of the anchor rod 2 includes the following steps:
step S605: reflected wave energy R is obtained through the acquisition analyzer 10; extracting the absolute value of the speed of each point in the speed value sequence in the acquired signal, multiplying the absolute value by the calculation time interval and then multiplying the absolute value by the wave impedance;
step S606: detecting the first complete debonding displacement u of the anchoring section through experiments0Length of anchoring section l initially debonded to complete debonding4Anchor hole diameter D, anchor resin thickness B, anchor body elastic modulus E2Shear stress tau at debonding of anchoring section0；
Step S607: calculating the anchoring force T of
Wherein A is4Coefficient relating to axial force for bond shear stress, A5Is a coefficient relating bonding stiffness and reflected energy.
As shown in fig. 6 and 7, when the auxiliary detection rod is not installed under the prestressing force of 50KN provided by the present invention, the excitation diagram (speed-time) of the excitation hammer for exciting the anchor rod along the axial direction of the anchor rod is shown, and the excitation diagram (speed-time) of the excitation hammer for exciting the auxiliary detection rod along the axial direction of the anchor rod after the auxiliary detection rod is installed is shown, wherein a is the reflection signal of the anchoring initial position, and b is the reflection signal of the anchoring end position.
As shown in fig. 8 and 9, which are respectively an excitation pattern (frequency-amplitude) of the anchor rod by the excitation hammer along the radial direction of the anchor rod when the auxiliary detection rod is not installed in the present invention, and an excitation pattern (frequency-amplitude) of the auxiliary detection rod by the excitation hammer along the radial direction of the anchor rod after the auxiliary detection rod is installed, the vibration fundamental frequency of the system after the auxiliary detection rod is installed is more accurate than the vibration fundamental frequency of the system without the auxiliary detection rod, so that the noise reduction treatment is required compared with the transverse vibration frequency spectrum data of the anchor system obtained in the past.
The anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration are characterized in that on the basis of a continuous beam theory, a testing auxiliary rod with a flat end surface and a large diameter is additionally arranged on an exposed section of an anchor rod to be tested, and the length and the sectional area of the exposed section of the anchor rod are increased; when the vibration hammer is adopted to act on the detection auxiliary rod along the axial direction of the detection auxiliary rod, the non-longitudinal clutter generated by the filter structure of the detection auxiliary rod is larger and smoother in sectional area, and can be highly coupled with the acceleration sensor, so that the detection is more convenient, and the result is more accurate; when the vibration hammer is adopted to act on the detection auxiliary rod along the radial direction of the detection auxiliary rod, the detection auxiliary rod increases the transverse deflection degree of the anchor rod exposed end structure and the bending moment at the supporting plate disc, so that the image recognition degree is higher, and the detection result is more accurate; meanwhile, the self stress wave waveform of the detection auxiliary rod is compared and integrated with the stress wave waveform obtained by connecting the detection auxiliary rod with the anchoring anchor rod, so that the physical filtering effect can be achieved, and the nondestructive detection waveform identification process is simpler, more convenient and quicker; according to the method, the axial load of the anchoring system is calculated by using the system vibration fundamental frequency, and the vibration fundamental frequency is positioned more clearly by lengthening the length of the exposed segment, so that the noise reduction step can be omitted.
The above description is provided for one embodiment of the present invention, and the embodiments of the present invention are not limited to these descriptions, and the present invention is not limited to the above nomenclature and the English nomenclature since the trade nomenclature is different. Similar or identical methods, structures and the like as those of the present invention or several technical deductions or substitutions made on the premise of the conception of the present invention should be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides an anchor rod anchor parameter nondestructive test device based on continuous beam vibration which characterized in that includes:
the anchor rod (2) is arranged in an anchor rod hole (11) on the surrounding rock (3), one end of the anchor rod is fixed in the anchor rod hole (11), and the other end of the anchor rod extends out of the anchor rod hole (11);
the tray (4) is arranged on the exposed section of the anchor rod (2) and is fixed on the surrounding rock (3) by a locking nut (5);
the detection auxiliary rod (7) is coaxially arranged with the anchor rod (2) and is detachably connected with the exposed section of the anchor rod (2);
the acceleration sensor (8) is arranged on the detection auxiliary rod (7), and the axis of the acceleration sensor (8) is parallel to or vertical to the axis of the detection auxiliary rod (7);
the acquisition analyzer (10) is connected with the acceleration sensor (8);
and the vibration hammer (9) is used for exciting the detection auxiliary rod (7) along the axial direction or the radial direction of the detection auxiliary rod (7), acquiring signals through the acceleration sensor (8), and analyzing by the acquisition analyzer (10) to detect anchor rod anchoring parameters.
2. The anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration is characterized in that a wave-resistant gasket (6) is arranged between the auxiliary detection rod (7) and the anchor rod (2).
3. The anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration is characterized in that the length of the auxiliary detection rod (7) is 2.5-3.5 times of the exposed section of the anchor rod (2).
4. The anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration is characterized in that the detection auxiliary rod (7) is a cylinder, the detection auxiliary rod (7) comprises an auxiliary rod body (71), a mounting groove (72) for the anchor rod (2) to extend into is arranged in the auxiliary rod body (71), an internal thread (12) is arranged on the inner wall of the mounting groove (72), and an external thread (11) matched with the internal thread (12) is arranged on the anchor rod (2).
5. A nondestructive testing method for anchor rod anchoring parameters based on continuous beam vibration is characterized by comprising the following steps:
step S1: an anchor rod hole (11) is formed in the surrounding rock (3), an anchor rod (2) to be tested extends into the anchor rod hole (11), one end of the anchor rod hole is fixed by an anchoring agent (1), and the other end of the anchor rod hole extends out of the anchor rod hole (11) and is fixed by a tray (4) and is locked by a locking nut (5);
step S2: selecting a detection auxiliary rod (7) and installing the detection auxiliary rod on the exposed end of the anchor rod (2);
step S3: installing an acceleration sensor (8) on a detection auxiliary rod (7) and connecting the acceleration sensor with an acquisition analyzer (10), ensuring that the axis of the acceleration sensor (8) is parallel to the axis of the detection auxiliary rod (7), axially exciting the detection auxiliary rod (7) along the detection auxiliary rod (7) by using an excitation hammer (9), and acquiring longitudinal vibration signals;
step S4: and (3) analyzing the longitudinal vibration signal acquired in the step S3 by the acquisition analyzer (10), and detecting the anchoring length of the anchor rod (2) and the anchor rod length.
6. The nondestructive testing method for anchor anchoring parameters based on continuous beam vibration is characterized in that the step S4 of testing the anchoring length of the anchor (2) comprises the following steps:
step S401: identifying signal positions of an anchoring initial end and an anchoring end on a oscillogram, and reading out the reflection time t of the anchoring initial end1And the reflection time t of the anchoring end2；
Step S402: experimental measurement of the sectional area A of the anchor rod1Modulus of elasticity E of anchor rod1Anchor density ρ1Wave velocity v of anchor rod1Anchor agent cross-sectional area A2Modulus of elasticity E of the anchoring agent2Anchor density ρ2；
Step S403: calculating the wave velocity c of the anchoring section as
Step S404: calculating the length l of the anchoring section2Is composed of
7. The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration is characterized in that the step S4 of testing the anchor rod length of the anchor rod (2) comprises the following steps:
step S405: calculating the free end length l1Is composed of
Wherein B is a constant associated with the detection aid lever (7);
step S406: calculating the length l of the anchor rod as
8. The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration is characterized by further comprising the following steps:
step S5: installing an acceleration sensor (8) on a detection auxiliary rod (7) and connecting the acceleration sensor with an acquisition analyzer (10), ensuring that the axis of the acceleration sensor (8) is vertical to the axis of the detection auxiliary rod (7), and exciting the detection auxiliary rod (7) along the radial direction of the detection auxiliary rod (7) by using an excitation hammer (9) to acquire transverse vibration signals;
step S6: the transverse vibration signal collected in step S5 is analyzed by the collection analyzer (10), and the axial force and the anchoring force of the anchor (2) are detected.
9. The nondestructive testing method for anchor anchoring parameters based on continuous beam vibration is characterized in that the step S6 of testing the axial force of the anchor (2) comprises the following steps:
step S601: the first derivative of the acceleration signal is obtained, and the speed extreme value v is read2；
Step S602: carrying out time-frequency analysis by using an acquisition analyzer (10) to obtain the first-order vibration circle frequency omega of the structure;
step S603: calculating exciting force FPIs composed of
Fp＝zv2，
Wherein z is the wave impedance of the detection auxiliary rod (7);
step S604: calculating the axial force F of
Wherein l3The length from the tray (4) to one end, far away from the anchor rod (2), of the detection auxiliary rod (7) and S are the area of the tray (4); c1～C4The parameters were measured for the experiments.
10. The anchor rod anchoring parameter nondestructive testing method based on continuous beam vibration is characterized in that the step S6 of testing the anchoring force of the anchor rod (2) comprises the following steps:
step S605: reflected wave energy R is obtained through the acquisition analyzer (10);
step S606: detecting the first complete debonding displacement u of the anchoring section through experiments0Length of anchoring section l initially debonded to complete debonding4Anchor hole diameter D, anchor resin thickness B, anchor body elastic modulus E2Shear stress tau at debonding of anchoring section0；
Step S607: calculating the anchoring force T of
Wherein A is4Coefficient relating to axial force for bond shear stress, A5Is a coefficient relating bonding stiffness and reflected energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110603908.1A CN113267564B (en) | 2021-05-31 | 2021-05-31 | Anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110603908.1A CN113267564B (en) | 2021-05-31 | 2021-05-31 | Anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113267564A true CN113267564A (en) | 2021-08-17 |
| CN113267564B CN113267564B (en) | 2024-10-18 |
Family
ID=77233719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110603908.1A Active CN113267564B (en) | 2021-05-31 | 2021-05-31 | Anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113267564B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702508A (en) * | 2021-09-03 | 2021-11-26 | 浙江师范大学 | Resonance acoustics nondestructive test device |
| CN115015110A (en) * | 2022-06-23 | 2022-09-06 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204101516U (en) * | 2014-09-12 | 2015-01-14 | 河南理工大学 | A kind of colliery resin anchor anchoring quality non destructive testing device |
| US20170160238A1 (en) * | 2014-07-22 | 2017-06-08 | Nuclear Fuel Industries, Limited | A non-destructive testing method and a non-destructive testing device for an anchor bolt |
-
2021
- 2021-05-31 CN CN202110603908.1A patent/CN113267564B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170160238A1 (en) * | 2014-07-22 | 2017-06-08 | Nuclear Fuel Industries, Limited | A non-destructive testing method and a non-destructive testing device for an anchor bolt |
| CN204101516U (en) * | 2014-09-12 | 2015-01-14 | 河南理工大学 | A kind of colliery resin anchor anchoring quality non destructive testing device |
Non-Patent Citations (2)
| Title |
|---|
| 樊智: "锚杆锚固力无损检测的数值模拟", 矿业工程研究, 30 June 2020 (2020-06-30) * |
| 谷洪飞: "锚杆无损检测稳定波形的激振点和检测点 ①", 矿业工程研究, 30 June 2019 (2019-06-30) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702508A (en) * | 2021-09-03 | 2021-11-26 | 浙江师范大学 | Resonance acoustics nondestructive test device |
| CN115015110A (en) * | 2022-06-23 | 2022-09-06 | 中交二航武汉港湾新材料有限公司 | Foam light soil layering detection device and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113267564B (en) | 2024-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108195535B (en) | Bolt joint looseness detection method and system based on nonlinear excitation characteristics | |
| CN113267564A (en) | Anchor rod anchoring parameter nondestructive testing device and method based on continuous beam vibration | |
| CN212008418U (en) | Drawable dynamic testing device for compactness of grouting body in steel bar sleeve | |
| EP3232190B1 (en) | Method for evaluating state of member | |
| CN102226783A (en) | Device and method for detecting pipeline closed cracks based on vibro-acoustic modulation technology | |
| CN111597653B (en) | Bridge structure defect dynamic detection and identification method for bridge crane | |
| US7270004B2 (en) | Method and apparatus for carrying out non-destructive testing of materials | |
| US7231304B2 (en) | Interference pattern testing of materials | |
| US20230228632A1 (en) | Method, System, Device and Medium for Online Monitoring of Plane Stress Field without Baseline Data Based on Piezoelectric Transducer Array | |
| CN115683369A (en) | Composite material space coupling ultrasonic plane stress detection method based on Lamb wave bimodal acoustic time ratio | |
| CN109298076B (en) | Lamb wave-based active valve internal leakage damage detection system and method | |
| CN217212426U (en) | Anchor rod anchoring parameter nondestructive testing device based on continuous beam vibration | |
| CN111623910B (en) | Suspension bridge cable clamp screw axial force identification method based on ultrasonic echo envelope modeling | |
| Barth et al. | Experimental determination of Lamb wave dispersion diagrams using 2d Fourier transform and laser vibrometry | |
| WO2020191704A1 (en) | Composite material dynamic fatigue testing device and method based on reverse resonance | |
| CN115753991B (en) | Application method of space coupling ultrasonic high-spatial resolution stress field measuring device | |
| CN111678465A (en) | Pipeline bending detection method based on ultrasonic guided waves | |
| CN108775984B (en) | Baseliness time reversal guided wave bolt pretightening force monitoring method | |
| CN113267536B (en) | Multi-frequency band impedance fusion loose bolt positioning method | |
| Cuc et al. | Disbond detection in adhesively bonded structures using piezoelectric wafer active sensors | |
| CN113640394A (en) | Fatigue crack identification method and system | |
| JPH09269268A (en) | Method for detecting looseness of bolt by strain wave analysis | |
| Fuchs et al. | Ultrasonic instrumentation for measuring applied stress on bridges | |
| WO2003044517A1 (en) | Method and apparatus for non-destructive testing of materials | |
| CN110274957B (en) | Interface bonding quality detection method for large-damping laminated structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |