CN102890117A - Method and device for detecting anchoring quality of long anchor cable - Google Patents
Method and device for detecting anchoring quality of long anchor cable Download PDFInfo
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Abstract
The invention discloses a method and a device for detecting the anchoring quality of a long anchor cable. The quality of an anchoring body of the anchor cable is detected by measuring the length of the anchor cable and qualitatively judging grouting compactness. The method comprises the following steps of: arranging an anchor cable sensor at an exposed end of a steel strand of the anchor cable; performing repeated transient excitation on the tip of the exposed rod; acquiring elastic wave signals produced in the anchor cable by using a vertical stack technology; acquiring identification parameters for judging the anchoring quality of the anchor cable by technologies and steps of data decompilation, spectral analysis, band-pass filtering, effective signal extraction and amplification, deconvolution filtering and detected result image output signal processing; performing quantitative calculation by using elastic wave velocity in the anchoring body of the anchor cable and transmission time of reflected wave signals generated by a reflecting interface at the bottom of the anchor cable, and judging length parameters of the anchor cable; and performing qualitative evaluation by using a changeable relation between energy and phase of reflected waves in a deep part of the anchoring body, and judging parameters of the grouting compactness of the anchor cable.
Description
Technical field
The invention belongs to applied geophysics elastic wave vibration detecting technical field, relate to a kind of long anchor cable method for detecting anchoring quality and device that the elastic wave reflex law technology is used for chamber and high gradient slope rock mass reinforcing processing.
Background technology
In the Geotechnical Engineering, adopt the anchorage cable anchoring technology, utilize anchor cable that fragmentation or unstable Rock And Soil and stable Rock And Soil are linked together, improve the resistance to overturning of engineering rock mass, significantly save construction material, be conducive to construction safety, become and improved Geotechnical Engineering stability and solve one of effective method of complicated geotechnical engineering problems.Compare with traditional method for protecting support such as spraying the anchor linked network; cable bolting can be in time behind Rock And Soil excavation and supporting is provided rapidly; reinforce on one's own initiative Rock And Soil; effectively control the Rock And Soil distortion; the shearing strength of original intensity on protection stratum, raising weakness or potential slipping plane; the Rock And Soil stress state is developed towards stabilising direction, can effectively prevent the Rock And Soil advantages such as destruction of caving in.Therefore, the anchorage cable anchoring technology is widely used in tunnel, side slope, the massif reinforcing engineerings such as mine, traffic, water conservancy and hydropower, geology.
The method of tradition anchor cable quality testing mainly contains pull-out test, bore extracting core process.Two kinds of methods have been brought into play vital role in the anchor cable quality testing, but they are destructive the detection, the shortcoming such as can not detect to the key index of the anchoring qualities such as segmentation anchor force, defective locations, compactness of grouting and anchorage length, make the requirement of its requirement that can not satisfy the anchor cable quality assessment and the rapid construction of engineering.The inelastic wave Dynamic Non-Destruction Measurements such as electrical method, electromagnetic method and magnetic method can be estimated the anchor cable quality theoretically, but because the limitation of himself, this technology is difficult to thoroughly evaluating anchor cable quality, can detect rock-bolt length such as the pulse electromagnetic wave reflectometry, but it is low to detect the jet grouting denseness of anchorage precision; Magnetic method can be estimated the anchor stress state, but can not estimate indexs such as rock-bolt length, defective locations.
The elastic wave reflex method is that the parameter index that utilizes fluctuation parameters amplitude, Wave energy and anchor pole quality index such as compactness of grouting to have certain correlativity detects the anchor cable quality, having harmless, quick, easy and low cost and other advantages, is the main method of anchor pole quality testing.The elastic wave reflex method is widely used in the anchor pole quality testing, and application is confined to the short anchor pole about 10m.
But along with hugeization of engineering and rapid, require to grow up apart from anchoring, the anchorage technology of anchor cable has obtained corresponding development and application, anchor cable length is about 30m in engineerings such as traffic, mines, in hydroelectric project, anchor cable length is then larger, is generally 50-80m especially.And the application of the overlength anchor cable more than the larger anchor cable of length, the especially 60m.Because the factors such as disguise of the rapid and anchor cable construction of the complicacy of anchor cable construction technique, the complicacy of surrounding rock structure, construction, will certainly there be mass defect in various degree in anchorage cable engineering, be difficult to satisfy the desired consolidation effect of engineering design, in order to guarantee anchorage cable anchoring quality engineering quality, engineering technical personnel are devoted to long anchor cable anchoring quality Dynamic Non-Destruction Measurement and method research.
Thus, the signal that runs into reception for the detection of long anchor cable anchoring quality is fainter, signal problem disturbs, we research and develop a kind of method and sensor special that the long anchor cable anchoring quality detects that be applicable to, attempt original signal bottom reflection ripple after filtering, amplifying processing, effectively effectively weak reflection wave signal is identified and extracted to the compacting undesired signal.
Summary of the invention
One of purpose of the present invention is to solve a little less than the anchorage cable anchoring quality testing useful signal energy and the large problem of high-frequency interferencing signal energy, propose a kind of with metering anchor cable length and anchoring body compactness of grouting, the method that the anchorage cable anchoring weight is detected and differentiates, by the elastic wave signal being carried out vertical superimposing technique collection and data processing technique and step, the output detections result map obtains the identification parameter that the anchorage cable anchoring quality is judged.
Two of purpose of the present invention is to propose a kind of long anchor cable anchoring quality pick-up unit, adopt anchor cable steel strand wires exposed junction that the anchor cable sensor is installed, this expose the rod end head arrange mangneto probe and excitation apparatus repeatedly transient state excite, adopt vertical superimposing technique to gather to the elastic wave signal that in anchor cable, produces, effectively collect the faint effective reflection signal in anchorage cable anchoring body deep, and can and extract this reflection wave signal from the identification of the sophisticated signal that collects, obtain quantitative anchor cable length and compactness of grouting qualitative discrimination result detects the anchorage cable anchoring weight.
The present invention solves its technical matters by the following technical solutions: a kind of long anchor cable method for detecting anchoring quality, mainly be quantitatively to calculate anchor cable length and the qualitative anchoring body compactness of grouting rank that provides, the anchorage cable anchoring weight is detected and differentiates, and concrete steps are as follows:
1) the anchor cable detection signal gathers;
2) anchorage cable anchoring bulk wave speed experiment;
3) signal processing of anchorage cable anchoring raw data;
4) anchorage cable anchoring quality testing result judges.
Wherein, step 1, behind anchor rope grouting to the anchorage cable stretching this time period, at anchor cable steel strand wires exposed junction acquisition testing signal, the installation of sensors position is at the anchor cable exposed junction, compress the anchor cable sensor with screw and make anchor cable sensor and steel strand wires become an elastic body, excite the position at exposed junction, excite with a super mangneto probe to produce the basically identical vibration signal of waveform; The anchor cable sensor receives the vibration of steel strand wires, and transfers mechanical signal to electric signal;
Wherein, step 2, when anchor cable was reeved, different depth was installed pre-buried sensor in the anchor cable body, observes at different times behind the anchor rope grouting, utilized and obtained time of arrival of the transmitted wave that sensor picks up the velocity of propagation of ripple in anchoring body;
Wherein, step 3 is carried out normalized to the raw data of detection signal collection, makes the detection waveform signal be in same magnitude level, carries out comparison of wave shape and spectrum analysis; Utilize anchorage cable anchoring body steel strand wires effectively to vibrate the frequency response value, set the upper and lower bound value of bandpass filtering, the non-linear amplifying techniques such as employing amplitude compensation are processed signal; Adopt again deconvolution filtering technology compacting interference wave signal, amplify useful weak signal, extract the reflection coefficient at wave impedance interface, inspection result figure output.
And, described step 2 and step 3 output anchor cable length and compactness of grouting recognition result.
And described step 1 pair original signal waveform is vertically stack repeatedly, obtains and amplifies effective weak signal, compacting undesired signal.
And, described step 1 repeated acquisition at least 3 to 6 times, the waveform character that reaches multi collect is basically identical.
And described step 2 sensor technology obtains the velocity of propagation of ripple in anchoring body, gathers the direct wave velocity of propagation that arrives at first sensor, and its waveform first arrival take-off is obvious.
A kind of long anchor cable anchoring quality pick-up unit mainly is that installation of sensors is exposed bar at anchor cable, and the mangneto probe is arranged on the anchor cable rod end, and the mangneto probe connects excitation apparatus, and sensor connects data collecting instrument.
And described sensor is hollow, and anchor cable penetrates wherein, and trip bolt is fixed on sensing on the anchor cable.
And described trip bolt is at least two or more, and trip bolt is two mutually vertical settings, and sensor is fixed on the anchor cable.
And, data collecting instrument access data treating apparatus, data processing equipment inspection result figure output.
The present invention compared with prior art also has following major advantage:
1, the present invention adopts systematized anchor cable signal processing method and step, effectively collects the faint effective reflection signal in anchorage cable anchoring body deep, and can identify and extract this reflection wave signal from the sophisticated signal that collects; According to the relation of reflection wave time of arrival, reflected energy and reflection wave phase place and incident wave phase place, can Quick anchorage cable anchoring quality, calculate exactly anchor cable length and qualitative evaluation compactness of grouting.
2, anchorage cable anchoring quality detection device of the present invention, the sensor that adopts is the hollow type piezoelectric sensor, and bar is exposed at anchor cable in the installation of sensors position, can guarantee sensor and anchor cable optimum matching, sensor bandwidth, frequency band range can cover the Hz-KHz of anchor cable structure vibration; At anchor cable steel strand wires exposed junction acquisition testing signal, excite the position at rod end, excitation apparatus connects the mangneto probe, and the observed pattern of data acquisition adopts vibrator and signal receiver to be installed in same steel strand wires, the energy that this observed pattern receives signal is the strongest, namely is conducive to the reception of feeble signal.
3, adopt vertical superimposing technique in the data acquisition of the present invention, this technology is utilized the floating-point amplifier function of data collecting instrument, at steel strand wires exposed junction termination excitation signal, be installed near the energizer signal receiving sensor and receive the vibration signal of propagating in the anchoring body, and be transferred to data collecting instrument.Same steel strand wires are repeatedly excited and receive, the timing curve addition that repeatedly receives, data collecting instrument is determined enlargement factor according to the signal magnitude after the addition automatically.Both according to the amplitude of vibration signal, dynamically adjusted enlargement factor (range ability), thereby the vibration signal that amplitude differs greatly was amplified to optimum value all the time, guaranteed the accurate measurement to Vibration Signal in Frequency Domain, and made waveform accurate, undistorted.The advantage that adopts vertical superimposing technique is the energy that increases feeble signal, and the compacting random interfering signal is conducive to extraction and the identification of feeble signal.
4, adopt velocity of wave Changing Pattern in the pre-buried sensor technical research anchoring body, namely at the inner signal transducer of installing of anchoring body, according to the different transmitted wave time of arrival that the length of time, pre-buried sensor received, calculate the velocity of propagation of efferent echo in anchoring body.When its velocity of wave Changing Pattern was nothing grouting, velocity of wave propagation was maximum in the anchoring body, and after the grouting, velocity of wave propagation reduces, and it is more closely knit to be in the milk, and velocity of wave is just less.
5, the present invention carries out the data layout reorganization to collecting data, change the data layout that the user can read into, in data, read maximum data, each data of timing curve are divided by maximal value, doing amplitude normalization processes, to reduce shooting conditions and excitation energy to the impact of detection waveform, energy is on the unified magnitude level, be conducive to the evaluation of anchoring body compactness of grouting.
6, Fourier transform is carried out in to received signal data processing of the present invention, determines the spectral characteristic of anchoring body vibration, determines the upper and lower bound value of bandpass filtering, carries out bandpass filtering, is beneficial to the frequency band range that keeps useful signal, improves the signal to noise ratio (S/N ratio) of detection signal.
7, data of the present invention are processed and are adopted non-linear amplifying technique.Deep reflex wave energy in the detection signal is weak except little with the boundary wave resistance difference, the geometrical attenuation of ripple, the distance that is the ripple propagation is larger, energy loss is larger, its energy has generally all caused energy loss by the attenuation by absorption of exponential form decay and viscoelastic medium, by above-mentioned exponential function is carried out inverse transformation, come the front geometrical attenuation of compensated wave and Absorption of Medium decay to the loss of reflected energy.Reach the purpose that strengthens weak reflected energy, and reflected energy is on the real level.
8, anchor cable quality elastic wave reflex method of the present invention adopts deconvolution filtering, and the wavelet waveform with certain perdurability is compressed, and has improved accuracy of detection, and can suppress undesired signal.
Description of drawings
Fig. 1 is the qualified original waveform curve map of detection method data acquisition of the present invention.
Fig. 2 is anchor cable 11,12 experiment different phase anchoring body velocity of wave change curves.
Fig. 3 is the flow chart of data processing figure of detection method of the present invention.
Fig. 4 is the data processing product figure of detection method of the present invention.
Fig. 5 is structure of the detecting device schematic diagram of the present invention.
Anchor cable (1), sensor (2), trip bolt (3), mangneto probe (4), excitation apparatus (5), connect data collecting instrument (6), data processing equipment (7).
The present invention is further described below in conjunction with drawings and Examples.
A kind of long anchor cable method for detecting anchoring quality, utilization collects the faint effective reflection signal in anchorage cable anchoring body deep, relation according to reflection wave time of arrival, reflected energy and reflection wave phase place and incident wave phase place, can calculate exactly anchor cable length and qualitative evaluation compactness of grouting, and the anchorage cable anchoring weight is detected and differentiates.Detection method is divided four steps: one, the anchor cable detection signal gathers; Two, anchorage cable anchoring bulk wave speed experiment; Three, the signal processing of anchorage cable anchoring raw data; Four, anchorage cable anchoring quality testing result judges.
To exciting the position to do experiment, the steel strand wires exposed junction termination that excites the position to be respectively installation anchor cable sensor is that swash and the anchor cable pallet for other the exposed junction termination of self-excitation, other steel strand wires.Carry out three kinds of tests that excite the position with choosing steel strand wires in a branch of anchor cable, and oscillogram after treatment.More than show: the signal that the self-excitation mode is tested acquisition is strong, and the signal that anchor cable pallet, other sharp mode are tested acquisition takes second place.Adopt the self-excitation mode, excite the position at rod end, excite with super mangneto probe of vibrator to produce the basically identical vibration signal of waveform.
Adopt vibrator and signal receiver to be installed in same steel strand wires, the energy that this observed pattern receives signal is the strongest, namely is conducive to the reception of feeble signal.Sensor adopts the hollow type piezoelectric sensor, compresses the anchor cable sensor with screw and makes anchor cable sensor and steel strand wires become an elastic body, guarantees sensor and anchor cable optimum matching, and sensor bandwidth, frequency band range can cover the Hz-KHz of anchor cable structure vibration.
Adopt velocity of wave Changing Pattern in the pre-buried sensor technical research anchoring body, namely at the inner signal transducer of installing of anchoring body, according to the different transmitted wave time of arrival that the length of time, pre-buried sensor received, calculate the velocity of propagation of efferent echo in anchoring body, gather the direct wave velocity of propagation that arrives at first sensor, its waveform first arrival take-off is obvious.Its velocity of wave Changing Pattern is, during without grouting, velocity of wave propagation is maximum in the anchoring body, and after the grouting, velocity of wave propagation reduces, and grouting is more closely knit, and velocity of wave is just less.
See Fig. 1, selected the detector and the anchor cable sensor that have repeatedly overlaying function.Adopt vertical superimposing technique in the data acquisition, utilize the floating-point amplifier function of data collecting instrument, at steel strand wires exposed junction termination transient state mode of excitation excitation signal, be installed near the energizer signal receiving sensor and receive the vibration signal of propagating in the anchoring body, and be transferred to data collecting instrument.This signal curve is timing curve, be presented on the display, repeat to excite and receive, the data addition of the same time point of timing curve that front and back collect for twice, equally, same steel strand wires are repeatedly excited and receive, the timing curve addition that repeatedly receives, data collecting instrument is determined enlargement factor according to the signal magnitude after the addition automatically.At least 3 of effective waveforms that single steel strand detects, and test waveform stability and high conformity.Both according to the amplitude of vibration signal, dynamically adjusted enlargement factor, thereby the vibration signal that amplitude differs greatly was amplified to optimum value all the time.Adopt vertical superimposing technique to increase the energy of feeble signal, the compacting random interfering signal is conducive to extraction and the identification of feeble signal.
See Fig. 3, the data processing method flow process, raw data, solution volume, amplitude normalization processing, spectrum analysis, bandpass filtering, non-linear amplification, deconvolution filtering, reflection wave parameter information extract, the anchoring quality evaluation.
Because the original signal that test obtains is comprised of undesired signal and useful signal.In the Non-Destructive Testing of anchor cable quality, ripple is propagated in anchoring body, owing to wavefront diffusion loss, propagation medium to reasons such as ripple absorption losss, useful signal is generally fainter, and often disturbed signal covers.
Carry out the data layout reorganization to collecting data, change the data layout that the user can read into, in data, read maximum data, each data of timing curve are divided by maximal value, do normalized, to reduce shooting conditions and excitation energy to the impact of detection waveform, energy is on the unified magnitude level, be conducive to the evaluation of anchoring body compactness of grouting.
Carry out to received signal Fourier transform, determine that the spectral characteristic of anchoring body vibration is analyzed.
According to the spectral characteristic of anchoring body vibration, determine the upper and lower bound value of bandpass filtering, carry out bandpass filtering, keep the frequency band range of useful signal.
Deep reflex wave energy in the detection signal is weak except little with the boundary wave resistance difference, the geometrical attenuation of ripple is that the distance of ripple propagation is larger, energy loss is larger, its energy has generally all caused energy loss and energy basically to decay by exponential form by the attenuation by absorption of exponential form decay and viscoelastic medium, by above-mentioned exponential function is carried out inverse transformation, come the front geometrical attenuation of compensated wave and Absorption of Medium decay to the loss of reflected energy.Reach the purpose that strengthens weak reflected energy, and reflected energy is got back on the real level.
Be subjected to the effects such as anchoring body medium, instrument and equipment, make the spike pulse that excites become the waveform with certain perdurability, reduced the accuracy of detection of data.Adopt deconvolution filtering, make the waveform with certain perdurability become spike pulse, improve the resolution of detection data, compacting undesired signal, the signal to noise ratio (S/N ratio) of raising signal.
The detection record that anchor cable quality elastic wave reflex method obtains can adopt convolution model synthetic, and namely detection record is the convolution of seismic wavelet and boundary reflection coefficient.Seismologic record and wavelet convolution can obtain anchoring body inner boundary reflection coefficient, drafting time and reflection coefficient curve.From curve, can more accurately read the position of reflecting interface.
See Fig. 4, data processing product figure, the oscillogram that namely after each flow processing, obtains.The 1st road is original waveform among the figure, and the 2nd road, the 3rd and the 4th road are waveform after treatment.Contrasting 4 road waveforms can find out: original waveform is more mixed and disorderly, anchor cable bottom reflection ripple identification difficulty; After treatment, waveform is more regular, can observe anchor cable bottom reflection ripple, has effectively suppressed bottom reflection ripple interference wave signal before.More than show, original signal is after filtering, amplification and deconvolution filtering etc. are processed, and undesired signal is effectively suppressed, and effectively weak signal is obviously strengthened.
Step 4, anchorage cable anchoring quality testing result judges.According to the relation of reflection wave time of arrival, reflected energy and reflection wave phase place and incident wave phase place, can calculate exactly anchor cable length and qualitative evaluation compactness of grouting, and the anchorage cable anchoring weight is detected and differentiates.
Utilize bottom reflection ripple time of arrival and anchoring body wave velocity test value, can calculate the length of anchor cable.Test shows: single steel strand computational length and actual measurement length maximum differ 3.00m, minimum 0.28m.The average relative error scope is 1.48～2.03m (average 1.75m).Error in length is in 5%.
Anchoring section density qualitative evaluation.By experiment as can be known, when not being in the milk, the anchoring body velocity of wave is about 5400m/s, and along with grouting and grouting increase the length of time, the anchoring body velocity of wave reduces, and after namely steel strand wires were bonded by mortar, the anchoring body velocity of wave reduced, and bonds more closely knitly, and velocity of wave reduces larger.According to elastic wave reflex method principle as can be known, ripple enters the little medium of wave impedance (velocity of wave) from the large medium of wave impedance (velocity of wave), reflection wave is identical with the incident wave phase place, on the contrary, ripple enters the large medium of wave impedance (velocity of wave) from the little medium of wave impedance (velocity of wave), and reflection wave and incident wave are anti-phase.For non-bonded anchorage cable, non-anchoring section steel strand wires directly contact with mortar is non-, and the anchoring section steel strand wires directly contact with mortar, and mortar is larger on the impact of anchoring section velocity of wave, and velocity of wave reduces more.Do not considering under the surrounding rock body quality condition, if reflection wave and incident wave homophase show that the anchoring section density is good, otherwise the anchoring section density are poor.Considering in the quality of surrounding rock situation, along with quality of surrounding rock improves, to calculate through indoor model, the reflection wave phase place becomes on the contrary from identical with the incident wave phase place.In sum, if reflection wave and incident wave homophase show that grouting quality is good, the reflection wave amplitude is larger, and grouting quality is better; If reflection wave and incident wave are anti-phase, show that quality of surrounding rock is good or grouting quality is poor, the reflection wave amplitude is larger, and grouting quality is poorer or quality of surrounding rock better.
See Fig. 5, long anchor cable anchoring quality pick-up unit, sensor (2) are installed in anchor cable (1) and expose bar, and mangneto probe () is arranged on anchor cable rod end (), mangneto probe (4) connects excitation apparatus (5), and sensor (2) connects data collecting instrument (6); Trip bolt (3) is two mutually vertical settings, and is at least two or more, and end sensor (2) is fixed on the anchor cable (1); Data collecting instrument (6) access data treating apparatus (7), data processing equipment inspection result figure output.
With sensor (2) with more than at least two or two above trip bolts (3) compress on the anchor cables (1), make anchor cable (14) and sensor (2) closely together, adopt mangneto probe (4) and sensor (2) to be installed in same steel strand wires, the energy that this observed pattern receives signal is the strongest, excite instant impact at anchor cable (14) exposed junction end excitation apparatus (5) mangneto probe (4), when propagating, elastic wave will produce particle vibration in anchor cable (1), when elastic wave was delivered to sensor (2) base position, particle vibration will be passed on sensor (2) base.
When the flexible ripple particle vibration of base, particle vibration is converted to electric charge, be about to vibration signal and become electric signal, select the data collecting instrument (6) that has repeatedly overlaying function, adopt vertical superimposing technique in the data acquisition, utilize the floating-point amplifier function of data collecting instrument, at steel strand wires exposed junction termination transient state mode of excitation excitation signal, be installed near the excitation apparatus (5) signal receiving sensor and receive the vibration signal of propagating in the anchoring body, and be transferred to data collecting instrument (6).
Data collecting instrument (6) access data treating apparatus (7), data processing equipment (7) carries out the data layout reorganization to the raw data of detection signal collection, doing amplitude normalization processes, to reduce shooting conditions and excitation energy to the impact of detection waveform, make the detection waveform signal be in same magnitude level, carry out the comparison of wave shape spectrum analysis, set the upper and lower bound value of bandpass filtering, the non-linear amplifying techniques such as employing amplitude compensation are processed signal; Adopt again deconvolution filtering technology compacting interference wave signal, extract the reflection coefficient at wave impedance interface, inspection result figure output.
Claims (9)
1. long anchor cable method for detecting anchoring quality is characterized in that: quantitatively calculate anchor cable length and the qualitative anchoring body compactness of grouting rank that provides, the anchorage cable anchoring weight is detected and differentiates, concrete steps are as follows:
1) the anchor cable detection signal gathers;
2) anchorage cable anchoring bulk wave speed experiment;
3) signal processing of anchorage cable anchoring raw data;
4) anchorage cable anchoring quality testing result judges.
Wherein, step 1, behind anchor rope grouting to the anchorage cable stretching this time period, at anchor cable steel strand wires exposed junction acquisition testing signal, the installation of sensors position is at the anchor cable exposed junction, compress the anchor cable sensor with screw and make anchor cable sensor and steel strand wires become an elastic body, excite the position at exposed junction, excite with a super mangneto probe to produce the basically identical vibration signal of waveform; The anchor cable sensor receives the vibration of steel strand wires, and transfers mechanical signal to electric signal;
Wherein, step 2, when anchor cable was reeved, different depth was installed pre-buried sensor in the anchor cable body, observes at different times behind the anchor rope grouting, utilized and obtained time of arrival of the transmitted wave that sensor picks up the velocity of propagation of ripple in anchoring body;
Wherein, step 3 is carried out normalized to the raw data of detection signal collection, makes the detection waveform signal be in same magnitude level, carries out comparison of wave shape and spectrum analysis; Utilize anchorage cable anchoring body steel strand wires effectively to vibrate the frequency response value, set the upper and lower bound value of bandpass filtering, the non-linear amplifying techniques such as employing amplitude compensation are processed signal; Adopt again deconvolution filtering technology compacting interference wave signal, amplify useful weak signal, extract the reflection coefficient at wave impedance interface, inspection result figure output.
2. method according to claim 1 is characterized in that: described step 2 and step 3 output anchor cable length and compactness of grouting recognition result.
3. method according to claim 1 is characterized in that: described step 1 pair original signal waveform is vertically stack repeatedly, obtains and amplifies effective weak signal, compacting undesired signal.
4. according to claim 1 or 3 described methods, it is characterized in that: described step 1 repeated acquisition at least 3 to 6 times, the waveform character that reaches multi collect is basically identical.
5. method according to claim 1, it is characterized in that: described step 2 sensor technology obtains the velocity of propagation of ripple in anchoring body, gathers the direct wave velocity of propagation that arrives at first sensor, and its waveform first arrival take-off is obvious.
6. long anchor cable anchoring quality pick-up unit, it is characterized in that: sensor (2) is installed in anchor cable (1) and exposes bar, mangneto probe (4) is arranged on anchor cable (1) rod end, mangneto probe (4) connects excitation apparatus (5), and sensor (2) connects data collecting instrument (6).
7. pick-up unit according to claim 6 is characterized in that: described sensor (2) is for hollow, and anchor cable (1) penetrates wherein, and trip bolt (3) is fixed on sensor (2) on the anchor cable (1).
8. pick-up unit according to claim 7, it is characterized in that: described trip bolt (3) is at least two or more, and trip bolt (3) is two mutually vertical settings, and sensor (2) is fixed on the anchor cable (1).
9. a kind of anchorage quality detection sensor according to claim 6 is characterized in that: data collecting instrument (6) access data treating apparatus (7), data processing equipment inspection result figure output.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697683A (en) * | 2014-12-27 | 2015-06-10 | 陕西煤业化工技术研究院有限责任公司 | Dynamic disaster mine anchor rock stability integrated detection method and system |
| CN104698083A (en) * | 2015-02-01 | 2015-06-10 | 山东科技大学 | Anchorage quality nondestructive testing method based on frequent micro technology |
| CN106198745A (en) * | 2016-07-05 | 2016-12-07 | 中国矿业大学 | Based on reflected energy than the anchoring defect length recognition methods of parameter |
| CN106290567A (en) * | 2016-08-12 | 2017-01-04 | 中国水利水电第七工程局有限公司 | A kind of lossless detection method of the long anchor pole of exposed junction in country rock or side slope supporting construction |
| CN108802110A (en) * | 2018-05-31 | 2018-11-13 | 宁波联城住工科技有限公司 | Detection device and its detection method for measuring grout sleeve Grouted density |
| CN109100421A (en) * | 2018-07-18 | 2018-12-28 | 中国电建集团中南勘测设计研究院有限公司 | The device and method of built-in type detection anchor rope grouting compactness |
| CN109538265A (en) * | 2017-09-22 | 2019-03-29 | 吴占瑞 | Tunnel overlength enlarged footing anchor cable and its method for protecting support |
| CN110208329A (en) * | 2019-06-24 | 2019-09-06 | 徐豫青 | A kind of sleeve Grouted density detection method and device |
| CN110231410A (en) * | 2019-06-12 | 2019-09-13 | 武汉市工程科学技术研究院 | Anchor pole detection without damage data intelligence means of interpretation |
| CN110749650A (en) * | 2019-10-16 | 2020-02-04 | 四川大学 | Anchor rod anchoring compactness grade evaluation method based on support vector machine |
| CN113188488A (en) * | 2021-04-29 | 2021-07-30 | 江河工程检验检测有限公司 | Nondestructive measurement method for length of anchor rod |
| CN113252782A (en) * | 2021-04-30 | 2021-08-13 | 国家电网有限公司 | Signal acquisition device and method for nondestructive testing of quality of multi-defect long anchor cable |
| CN114200016A (en) * | 2021-10-18 | 2022-03-18 | 中国科学院武汉岩土力学研究所 | Double-channel nondestructive detection method for rock anchor rod and related equipment |
-
2012
- 2012-02-15 CN CN2012100338377A patent/CN102890117A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 马芳平: "预应力锚索施工质量无损检测试验研究", 《人民长江》 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697683B (en) * | 2014-12-27 | 2017-04-05 | 陕西煤业化工技术研究院有限责任公司 | Dynamic disaster mine anchor rock stability integrated testing method and system |
| CN104697683A (en) * | 2014-12-27 | 2015-06-10 | 陕西煤业化工技术研究院有限责任公司 | Dynamic disaster mine anchor rock stability integrated detection method and system |
| CN104698083A (en) * | 2015-02-01 | 2015-06-10 | 山东科技大学 | Anchorage quality nondestructive testing method based on frequent micro technology |
| CN106198745B (en) * | 2016-07-05 | 2019-03-08 | 中国矿业大学 | Anchoring defect length recognition methods based on reflected energy than parameter |
| CN106198745A (en) * | 2016-07-05 | 2016-12-07 | 中国矿业大学 | Based on reflected energy than the anchoring defect length recognition methods of parameter |
| CN106290567A (en) * | 2016-08-12 | 2017-01-04 | 中国水利水电第七工程局有限公司 | A kind of lossless detection method of the long anchor pole of exposed junction in country rock or side slope supporting construction |
| CN109538265A (en) * | 2017-09-22 | 2019-03-29 | 吴占瑞 | Tunnel overlength enlarged footing anchor cable and its method for protecting support |
| CN108802110A (en) * | 2018-05-31 | 2018-11-13 | 宁波联城住工科技有限公司 | Detection device and its detection method for measuring grout sleeve Grouted density |
| CN109100421A (en) * | 2018-07-18 | 2018-12-28 | 中国电建集团中南勘测设计研究院有限公司 | The device and method of built-in type detection anchor rope grouting compactness |
| CN109100421B (en) * | 2018-07-18 | 2021-11-05 | 中国电建集团中南勘测设计研究院有限公司 | Device and method for detecting grouting compactness of anchor cable in embedded mode |
| CN110231410A (en) * | 2019-06-12 | 2019-09-13 | 武汉市工程科学技术研究院 | Anchor pole detection without damage data intelligence means of interpretation |
| CN110208329A (en) * | 2019-06-24 | 2019-09-06 | 徐豫青 | A kind of sleeve Grouted density detection method and device |
| CN110749650A (en) * | 2019-10-16 | 2020-02-04 | 四川大学 | Anchor rod anchoring compactness grade evaluation method based on support vector machine |
| CN110749650B (en) * | 2019-10-16 | 2021-11-02 | 四川大学 | Anchor rod anchoring compactness grade evaluation method based on support vector machine |
| CN113188488A (en) * | 2021-04-29 | 2021-07-30 | 江河工程检验检测有限公司 | Nondestructive measurement method for length of anchor rod |
| CN113188488B (en) * | 2021-04-29 | 2023-07-14 | 江河工程检验检测有限公司 | Nondestructive measuring method for length of anchor rod |
| CN113252782A (en) * | 2021-04-30 | 2021-08-13 | 国家电网有限公司 | Signal acquisition device and method for nondestructive testing of quality of multi-defect long anchor cable |
| CN114200016A (en) * | 2021-10-18 | 2022-03-18 | 中国科学院武汉岩土力学研究所 | Double-channel nondestructive detection method for rock anchor rod and related equipment |
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