CN108663384A - A kind of anchor pole detection without damage device and method based on TDR - Google Patents
A kind of anchor pole detection without damage device and method based on TDR Download PDFInfo
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- CN108663384A CN108663384A CN201810590093.6A CN201810590093A CN108663384A CN 108663384 A CN108663384 A CN 108663384A CN 201810590093 A CN201810590093 A CN 201810590093A CN 108663384 A CN108663384 A CN 108663384A
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- anchor pole
- mobile jib
- probe
- tdr
- strut
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
Abstract
The anchor pole detection without damage device and method based on TDR that the invention discloses a kind of, including anchor pole, the anchor pole include anchor pole mobile jib, stop grouting plug, gasket, nut and stifled slurry lid；It further include the detection part being connected with anchor pole；Detection part includes signal generator, acquisition oscillograph, probe and probe, and the signal generator and acquisition oscillograph are connected with probe, and the anchor pole is connected as the probe of detection part with probe.Anchor metal mobile jib is provided with cutting ferrule, strut, drill bit, and the strut passes through stop grouting plug, gasket and nut, and with three's insulated contact.TDR probes silk, end-bit are wound outside non-metallic rock mobile jib, anchor pole mobile jib is hollow or solid.It is connected anchor pole as the probe of detection part and probe, pulse is emitted by detection part signal generator, acquisition oscillograph acquires signal, calculates anchor pole physical length, detect the quality of anchor pole；The present invention can both realize the detection of anchor pole quality, can be used for the intensity for improving anchor pole.
Description
Technical field
A kind of anchor pole detection without damage device and method based on TDR of the present invention, belong to nondestructive detection-measurement for anchor bars field.
Background technology
In all kinds of underground engineerings and side slope nursing, anchor rod anchored technology has become main reinforcing means, extensive use
In the engineering constructions such as urban transportation, the power station roads, Insurance.For to a certain extent, anchor rod anchored quality directly decides
The quality of entire engineering, and quality of the drawing detection technique used in the past because being unable to actual response anchor pole, are seldom adopted
With.
Currently, examine the method for anchor pole quality many by non-destructive testing, such as supercritical ultrasonics technology, Shock stress Wave method etc.,
But these methods are required for complicated calculating operation process, measurement result can also be influenced by gauger, and and anchor pole
Coupling it is poor.Concretely, Ultrasonic Nondestructive method is primarily present two problems, is that ultrasonic attenuation is serious first,
When rock-bolt length is longer, the Wave data that scene obtains is of low quality, the phenomenon that often will appear misjudgement and fail to judge, usually only
Shorter anchor pole can effectively be measured, followed by anchor pole measure end require it is harsh, need at the scene to termination point of anchor rod section into
Row polishes processing, could be by ultrasonic wave-coupled into anchor pole.
Time domain reflectometry（Time Domain Reflectometry, TDR）It is a kind of long-range remote sensing measuring technology, generates
In in the 1930s, being used primarily for the positioning and identification of power circuit defect in electric power and Electronic Industry.Currently, usually in water
More unique advantage is shown in terms of dividing assay method, both can measure surface soil moisture, it can also be used to measure section moisture.When
Domain bounce technique probe end is open circuit, signal transmitting terminal there are one sampled point, measurement is that electromagnetic wave is popped one's head in soil
The propagation time of upper round trip.The advantages of TDR methods is that measuring speed is fast, easy to operate, and accuracy is high, and measurement data is easy to locate
Reason, it is more more stable than other methods, small, more power saving is influenced by salinity, cable length limitation is few, can continuous in-situ measurement and without spoke
It penetrates.
Although time domain reflectometry have it is so many a little but still be not used for rock-bolt length and quality testing, this patent
Send out a kind of bright time domain reflectometry non-destructive testing anchor pole quality device.
Invention content
The present invention overcomes the shortcomings of the prior art, and the technical problem to be solved is that provide a kind of anchor based on TDR
Bar non-destructive testing device and method.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of anchor pole detection without damage device based on TDR, including anchor pole, the anchor pole include anchor pole mobile jib, stop grouting plug, gasket,
Nut and stifled slurry cover；Further include：The detection part being connected with the exposed end of anchor pole；The detection part include signal generator,
Oscillograph, probe and probe are acquired, the signal generator and acquisition oscillograph are connected with probe；
The anchor pole mobile jib is outer threaded metallic rod, and outer hoop has several insulation sleeves, be provided in the cutting ferrule 2 with
On be parallel to the axial strut of anchor pole mobile jib, the strut is that light justifies metal solid hopkinson bar, exposed junction and probe connection；
The anchor pole mobile jib further includes the detachable drill bit for being set to anchor pole mobile jib top, the bit central axis in anchor pole mobile jib
Mandrel is coaxial, and cross section is more than the surrounded section of strut outer rim, and the drill bit is metal, is connect with anchor pole mobile jib.
The anchor pole mobile jib and strut are connected with probe, the probe portion as detection part.
The strut is equidistantly uniformly distributed around anchor pole mobile jib, the strut pass through stop grouting plug, gasket and nut, and with
Three's insulated contact.
The cutting ferrule inner wall is smooth surface, and smears lubricant.
The anchor pole mobile jib is outer threaded nonmetallic bar, and outer uniform winding is provided with several TDR probes silks；It is described
TDR probe silks are wire, are penetrated inside anchor pole mobile jib close to stop grouting plug position, and are pierced by by stifled slurry lid, with the spy
Head connection；
The anchor pole mobile jib further includes the detachable drill bit for being set to anchor pole mobile jib top, the bit central axis and anchor pole master
Bar central axis, cross section are more than anchor pole mobile jib section, and the drill bit is metal material, is connected with the TDR probes silk front end
It connects.
Notch needed for winding TDR probe silks is reserved on the anchor pole mobile jib.
The anchor pole mobile jib is hollow or solid.
A method of the anchor pole detection without damage based on TDR,
It is connected anchor pole as the probe of detection part and probe, pulse is emitted by detection part signal generator, acquisition is shown
Wave device acquires signal, calculates anchor pole physical length, detects the quality of anchor pole；
Under the conditions of poor geology, hole is first excavated on wall, and grouting behind shaft or drift lining, anchor pole mobile jib do not install drill bit, and anchor pole is inserted into
Into the hole for excavating slip casting, signal generator emits pulse, and acquisition oscillograph acquires signal, calculates anchor pole physical length, if
It was found that it is second-rate, it ascertains the reason and continues slip casting, reach the fully wrapped around anchor pole of slurries, and can penetrate into stratum, wait for slurries
Solidification, retests anchor pole quality, detects the completion quality of final anchor pole；
After excavating hole on country rock, anchor pole mobile jib does not install drill bit, and anchor pole is inserted into hole, by slip casting machine toward hollow
Slip casting in anchor pole, slurries gradually fill hole to overflowing, anchor pole mobile jib or strut are submerged wherein；Stop grouting plug is installed, with detection
The length of apparatus measures anchor pole installs gasket and nut after waiting slurries to solidify substantially；Rock-bolt length is remeasured, determines that slurries are solidifying
Rock-bolt length after Gu；
When anchor pole mobile jib is equipped with drill bit, anchor pole gradually pierces stratum by drilling machine, behind precalculated position to be achieved, connection probe and
Anchor pole detects rock-bolt length；Start slip casting to slurries to overflow, stop grouting plug, connection probe and anchor pole are installed, the practical quilt of anchor pole is detected
Slurries packages length；It waits for that slurries solidify installation backing plate and nut substantially, prestressing force is applied to anchor pole.
Compared to the prior art the present invention has the advantages that.
（1）Anchor rod nondestructive testing method based on TDR, electric signal conductibility is strong between measurement probe and detected anchor pole,
And detection device is convenient for carrying, easy to operate, is highly suitable for large area detection.
（2）The present invention can be used for remote multi-point automatic monitoring, and measurement data is easily handled, it is more steady than other methods
It is fixed, to be influenced small, more power saving, cable length limitation by salinity few, can continuous in-situ measure and radiationless.
（3）The present invention can both realize the detection of anchor pole quality, can be used for the intensity for improving anchor pole.
Description of the drawings
Fig. 1 is TDR self-drilling types anchor metal quality detection device structural schematic diagram of the present invention；
Fig. 2 is TDR self-drilling types non-metallic rock quality detection device structural schematic diagram of the present invention；
Fig. 3 is ferrule structure schematic diagram.
In figure：1 is signal generator, and 2 be acquisition oscillograph, and 3 be probe, and 4 cover for stifled slurry, 5 be nut, 6 are gasket, 7
It is strut for stop grouting plug, 8,9 is anchor pole mobile jib, 10 is cutting ferrule, 11 is drill bit, 12 is TDR probes silk, 13 is that 14 be reserved
Hole, 15 be strut limit hole.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1, 2, a kind of anchor pole detection without damage device based on TDR, including anchor pole, the anchor pole include anchor pole master
Bar 9, stop grouting plug 7, gasket 6, nut 5 and stifled slurry lid 4；Further include：The detection part being connected with the exposed end of anchor pole；The detection
Component includes signal generator 1, acquisition oscillograph 2, probe 3 and probe, the signal generator 1 and acquire oscillograph 2 with
3 connection of probe, the anchor pole are connect as the probe of detection part with probe 3.
The anchor pole mobile jib is outer threaded metallic rod, and outer hoop has several insulation sleeves 10, set in the cutting ferrule 10
Several axial struts 8 for being parallel to anchor pole mobile jib are equipped with, the strut 8 is that light justifies metal solid hopkinson bar, exposed junction and institute
State 3 connection of probe；The anchor pole mobile jib 9 further includes the detachable drill bit 11 for being set to 9 top of anchor pole mobile jib, the drill bit 11
Central shaft and 9 central axis of anchor pole mobile jib, cross section are more than the surrounded section of 8 outer rim of strut, and the drill bit 11 is metal, with
Anchor pole mobile jib 9 connects.
The strut quantity is 2 or more.
The strut 8 is equidistantly uniformly distributed around anchor pole mobile jib 9, and the strut 8 passes through stop grouting plug 7, gasket 6 and nut
5, and with three's insulated contact.
The anchor pole mobile jib 9 passes through 10 fixed position of cutting ferrule and keeping parallelism with strut 8；If being provided on the cutting ferrule 10
The strut limit hole 15 of dry equidistantly distributed, the every strut 8 pass through the strut limit hole 15 on several cutting ferrules；The cutting ferrule
10 inner walls are smooth surface, and smear lubricant so that in drilling process, only anchor pole mobile jib 9 rotates, and strut 8 keeps quiet
Only；Cutting ferrule 10 can not only limit the position of strut 8, but also cannot limit the rotation of anchor pole mobile jib 9, and the setting of limiting slot, make
It obtains during drill bit 11 pierces, the discharge of dregs cannot change the position where cutting ferrule 10；
15 quantity of strut limit hole is 2 or more.
The anchor pole mobile jib 9 is outer threaded nonmetallic bar, and outer uniform winding is provided with several TDR probes silks 12；
The TDR probes silk 12 is wire, and the non-metallic rock mobile jib 9 is being provided with preformed hole 14, TDR close to stop grouting plug position
Probe silk 12 is penetrated from preformed hole 14 inside anchor pole mobile jib 9, and is pierced by by stifled slurry lid, is connect with the probe 3；The TDR
12 quantity of probe silk is two or more.
The non-metallic rock mobile jib 9 is glass fiber material.
The anchor pole mobile jib 9 further includes the detachable drill bit 11 for being set to 9 top of anchor pole mobile jib, 11 center of the drill bit
Axis and 9 central axis of anchor pole mobile jib, cross section are more than 9 section of anchor pole mobile jib, and the drill bit 11 is metal material, and described
The front end of TDR probes silk 12 is intertwined and connected, until the TDR probes silk 12 is wound to bit exterior insulating materials.
Notch needed for winding TDR probes silk 12 is reserved on the anchor pole mobile jib 9, to prevent the cunning of drilling process middle probe
It is dynamic.
The anchor pole mobile jib 9 is hollow or solid.
Metallic struts 8 should not contact or make insulation processing with backing plate and nut.Anchor pole mobile jib 9 can be left-hand thread or right-hand thread
Reinforcing bar, so that closely solidification rear slurry is connect with anchor pole mobile jib 9, and strut 8 can be plain bar or spiral.Strut 8 can
Using the support as anchor pole mobile jib 9, anchor pole mobile jib 9 is placed in the centre in institute's borehole hole, reaches anchor pole mobile jib 9 and slurries fully connects
Tactile effect；In addition, the addition of strut 8 can reinforce the entire anchor pole breakout capacity of itself；Most of all, 9 He of anchor pole mobile jib
TDR nondestructive detection systems are formed between strut 8, and after being connect with probe 3, bolt grouting matter can be determined by time domain reflectometry
Amount and rock-bolt length.
A method of the anchor pole detection without damage based on TDR,
It is connect using anchor pole as the probe of detection part with probe 3, pulse is emitted by detection part signal generator, acquisition is shown
Wave device acquires signal, calculates anchor pole physical length, detects the quality of anchor pole；
Under the conditions of poor geology, hole is first excavated on wall, and grouting behind shaft or drift lining, anchor pole mobile jib are solid, drill bit are not installed, by anchor
Bar is inserted into the hole for excavating slip casting, and signal generator emits pulse, and acquisition oscillograph acquires signal, calculates anchor pole actual (tube) length
Degree, if it find that it is second-rate, it ascertains the reason and continues slip casting, reach the fully wrapped around anchor pole of slurries, and can penetrate into stratum,
It waits for grout cures, retests anchor pole quality, detect the completion quality of final anchor pole；
After excavating hole on country rock, anchor pole mobile jib is hollow, does not install drill bit, and anchor pole is inserted into hole, slip casting machine is passed through
The slip casting into hollow anchor pole, slurries gradually fill hole to overflowing, anchor pole mobile jib 9 or strut 8 are submerged wherein；Installation is only starched
Plug measures the length of anchor pole with detecting instrument, and gasket and nut are installed after waiting slurries to solidify substantially；Rock-bolt length is remeasured,
Determine rock-bolt length after grout cures；
When anchor pole mobile jib is equipped with drill bit, using hollow anchor bar mobile jib, anchor pole gradually pierces stratum by drilling machine, to be achieved predetermined
Behind position, connection probe 3 and anchor pole detect rock-bolt length；Start slip casting to slurries to overflow, stop grouting plug, connection 3 Hes of probe are installed
Anchor pole, detection anchor pole are practical by slurries packages length；It waits for that slurries solidify installation backing plate and nut substantially, anchor pole application is answered in advance
Power.
Non-metallic rock needs the direction along winding probe to rotate, prevents probe in drilling in anchor pole drilling process
It falls off.
Drill bit 11 is connected to the end of mobile jib, and drill bit 11 is detachable setting, removes it without the use of when drill bit 11, will
Anchor pole is inserted into the hole dug in advance, carries out slip casting and detection.When needing using drill bit 11,11 direction of advance cross section energy of drill bit
8 outer rim institute envelope surface product of all struts is covered, when rotating anchor pole mobile jib 9, drill bit 11 rotates therewith and cut country rock, while anchor
Bar is headed into country rock, until reaching precalculated position, then carries out slip casting, installation stop grouting plug 7, backing plate 6, nut 5 after slip casting is overflowed
Deng.
When being metal for anchor pole mobile jib, mobile jib can be placed in the centre in institute's borehole hole by strut as the support of mobile jib,
Achieve the effect that mobile jib and slurries come into full contact with；In addition, the addition of strut can reinforce the entire anchor pole breakout capacity of itself；It is most heavy
It wants, forms TDR nondestructive detection systems between mobile jib and strut, it, can be true by time domain reflectometry after being connected with probe
Determine bolt grouting quality and rock-bolt length.
Can be the nonmetallic bar of the materials such as glass fibre when anchor pole mobile jib is nonmetallic, probe is wire, winds metal
Silk radical is not limited to 3.The sliding of probe in order to prevent can reserve notch needed for winding on non-metallic rock mobile jib.TDR is visited
Needle enters Hollow non-metallic anchor pole in preformed hole, and is pierced by outside anchor pole across stifled slurry lid, and probe can be connected with probe herein
Carry out the detection of anchor pole quality.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present invention
Go out various change.
Claims (7)
1. a kind of anchor pole detection without damage device based on TDR, including anchor pole, the anchor pole include anchor pole mobile jib（9）, stop grouting plug
（7）, gasket（6）, nut（5）It is covered with stifled slurry（4）, which is characterized in that further include：The test section being connected with the exposed end of anchor pole
Part；The detection part includes signal generator（1）, acquisition oscillograph（2）, probe（3）, the signal generator（1）With adopt
Collect oscillograph（2）With probe（3）Connection；
The anchor pole mobile jib（9）For outer threaded metallic rod, the anchor pole mobile jib（9）Outer hoop has several insulation sleeves（10）；
The cutting ferrule（10）On be provided with the strut limit holes of several equidistantly distributeds（15）, each strut limit hole（15）Inside wear
If a strut（8）, the strut（8）Justify metal solid hopkinson bar for light, is parallel to the axial direction of anchor pole mobile jib, the strut（8）It is outer
Reveal end and the probe（3）Connection；The anchor pole mobile jib（9）It further include the detachable drill bit for being set to top（11）, described
Drill bit（11）Central shaft and anchor pole mobile jib（9）Central axis, cross section are more than strut（8）The surrounded section of outer rim, the brill
Head（11）For metal, with anchor pole mobile jib（9）Connection；
The anchor pole mobile jib（9）And strut（8）With probe（3）It is connected, the probe portion as detection part.
2. a kind of anchor pole detection without damage device based on TDR as described in claim 1, which is characterized in that the strut（8）It encloses
Around anchor pole mobile jib（9）It is equidistantly uniformly distributed, the strut（8）Across stop grouting plug（7）, gasket（6）And nut（5）, and with three
Person's insulated contact.
3. a kind of anchor pole detection without damage device based on TDR as described in claim 1, which is characterized in that the cutting ferrule（10）
Inner wall is smooth surface, and smears lubricant.
4. a kind of anchor pole detection without damage device based on TDR as described in claim 1, which is characterized in that the anchor pole mobile jib
（9）For outer threaded nonmetallic bar, outer uniform winding is provided with several TDR probes silks（12）；The TDR probes silk（12）
For wire, anchor pole mobile jib is being penetrated close to stop grouting plug position（9）Inside, and be pierced by by stifled slurry lid, with the probe（3）Even
It connects；The anchor pole mobile jib（9）It further include the detachable drill bit for being set to top（11）, the drill bit（11）Central shaft and anchor pole
Mobile jib（9）Central axis, cross section are more than anchor pole mobile jib（9）Section, the drill bit（11）For metal material, with the TDR
Probe silk（12）Front end connection.
5. a kind of anchor pole detection without damage device based on TDR as claimed in claim 4, which is characterized in that the anchor pole mobile jib
（9）Upper reserved winding TDR probe silks（12）Required notch.
6. a kind of anchor pole detection without damage device based on TDR according to any one of claims 1 to 5, which is characterized in that the anchor
Bar mobile jib（9）It is hollow or solid.
7. a kind of method of the anchor pole detection without damage based on TDR, which is characterized in that
It is connected anchor pole as the probe of detection part and probe, pulse is emitted by detection part signal generator, acquisition is shown
Wave device acquires signal, calculates anchor pole physical length, detects the quality of anchor pole；
Under the conditions of poor geology, hole is first excavated on wall, and grouting behind shaft or drift lining, anchor pole mobile jib do not install drill bit, and anchor pole is inserted into
Into the hole for excavating slip casting, signal generator emits pulse, and acquisition oscillograph acquires signal, calculates anchor pole physical length, if
It was found that it is second-rate, it ascertains the reason and continues slip casting, reach the fully wrapped around anchor pole of slurries, and can penetrate into stratum, wait for slurries
Solidification, retests anchor pole quality, detects the completion quality of final anchor pole；
After excavating hole on country rock, anchor pole mobile jib does not install drill bit, and anchor pole is inserted into hole, by slip casting machine toward hollow
Slip casting in anchor pole, slurries gradually fill hole to overflowing, anchor pole mobile jib or strut are submerged wherein；Stop grouting plug is installed, with detection
The length of apparatus measures anchor pole installs gasket and nut after waiting slurries to solidify substantially；Rock-bolt length is remeasured, determines that slurries are solidifying
Rock-bolt length after Gu；
When anchor pole mobile jib is equipped with drill bit, anchor pole gradually pierces stratum by drilling machine, behind precalculated position to be achieved, connection probe and
Anchor pole detects rock-bolt length；Start slip casting to slurries to overflow, stop grouting plug, connection probe and anchor pole are installed, the practical quilt of anchor pole is detected
Slurries packages length；It waits for that slurries solidify installation backing plate and nut substantially, prestressing force is applied to anchor pole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810590093.6A CN108663384B (en) | 2018-06-08 | 2018-06-08 | Anchor rod nondestructive testing device and method based on TDR |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810590093.6A CN108663384B (en) | 2018-06-08 | 2018-06-08 | Anchor rod nondestructive testing device and method based on TDR |
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| CN108663384B CN108663384B (en) | 2020-07-31 |
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Cited By (2)
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| CN111965254A (en) * | 2019-11-05 | 2020-11-20 | 中国葛洲坝集团第二工程有限公司 | Nondestructive testing method for long exposed anchor rod |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111965254A (en) * | 2019-11-05 | 2020-11-20 | 中国葛洲坝集团第二工程有限公司 | Nondestructive testing method for long exposed anchor rod |
| CN111122619A (en) * | 2019-12-31 | 2020-05-08 | 青岛海洋地质研究所 | Water content measuring system based on parallel spiral type telescopic time domain reflection probe |
| CN111122619B (en) * | 2019-12-31 | 2022-02-18 | 青岛海洋地质研究所 | Water content measuring system based on parallel spiral type telescopic time domain reflection probe |
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