CN101650242A - Method for nondestructive detection of prestressing force under anchor of anchor rope - Google Patents
Method for nondestructive detection of prestressing force under anchor of anchor rope Download PDFInfo
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- CN101650242A CN101650242A CN200910104354A CN200910104354A CN101650242A CN 101650242 A CN101650242 A CN 101650242A CN 200910104354 A CN200910104354 A CN 200910104354A CN 200910104354 A CN200910104354 A CN 200910104354A CN 101650242 A CN101650242 A CN 101650242A
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Abstract
The invention discloses a method for the nondestructive detection of prestressing force under an anchor of an anchor rope. A model is established by a functional relationship between the prestressingforce and the wave speed, the anchor rope generates an elastic wave by a vibration source during detection, the propagation speed of the elastic wave is measured and a prestressing force numerical value corresponding to the measured wave speed is obtained according to the functional relationship of the prestressing force and the wave speed. The invention only needs to carry out the vibration excitation of an exposed section of the anchor rope, does not need to apply external force to the anchor rope and does not destroy the self anchoring structure, thereby obtaining the prestressing force under the anchor of the anchor rope and playing an important meaning for controlling the construction quality of newly-built anchoring engineering and mastering the operation condition and the safety ofthe prior anchoring engineering.
Description
Technical field
The present invention relates to a kind of civil engineering work lossless detection method, particularly a kind of method for nondestructive detection of prestressing force under anchor of anchor rope.
Background technology
Prestressing techniques such as anchor cable are used widely in civil engineering work.As it is stable etc. to be used for slope reinforcement, bridge prestress concrete, tunnel and underground works reinforcing and Deformation control, works.
Prestress engineerings such as anchor cable not only use amount are increasing, and are directly connected to the security and stability of engineering.Prestress such as anchor cable are as initiatively applying prestressed engineering, and the security and stability of engineering depends on the reinforcement effect of anchor cable to a great extent.
Anchor lower prestress refers to the tension force of anchor cable, i.e. the actual pulling force numerical value of prestress anchorage cable.For new construction, refer to the effective prestress value behind the construction stretching; To the operation engineering, refer to the work prestress value.
The actual pulling force that anchor cable provided is much, does prestress lose excessive or overload after construction stretching puts, moves a period of time in place? this problem is perplexing anchoring engineering circle always, does not also have reliable detection method at present.Present method be the construction stage with regard to pre-buried force cell, thereby anchor lower prestress is monitored.But,, just can't detect the size of anchor lower prestress if do not have pre-buriedly in the construction stage.And the cost of pre-buried force cell is higher, is difficult to bury underground in a large number, adopts the survival rate of general sensor also lower, is difficult to permanently effective.
Therefore, seek a kind of prestressing force under anchor of anchor rope detection method, do not destroy anchor structure itself or influence its serviceability, to the construction quality of controlling newly-built anchoring engineering, grasp the existing anchorage engineering operation conditions and security significant.
Summary of the invention
In view of this, the invention provides the anchor lower prestress lossless detection method of prestressed strands such as a kind of anchor cable, do not destroy anchor structure itself or influence its serviceability, can test prestressing force under anchor of anchor rope, to the construction quality of controlling newly-built anchoring engineering, grasp the existing anchorage engineering operation conditions and security significant.
Method for nondestructive detection of prestressing force under anchor of anchor rope of the present invention may further comprise the steps:
A. set up anchor cable velocity of wave and prestress two-dimensional coordinate system, and at the built-in vertical wave of two-dimensional coordinate system speed and prestress coordinate curve, determine the funtcional relationship of velocity of wave and prestress coordinate curve according to velocity of wave and prestress coordinate curve;
B. the revealed section at anchor cable excites elastic wave, records the velocity of wave of elastic wave in anchor cable according to formula v=2L/T; Wherein v is a velocity of wave, and L is the length of anchor cable, and to be elastic wave occur to the time of returning the revealed section end face from the revealed section end face of anchor cable to T;
C. according to the velocity of wave numerical value that records, calculate the prestress of anchoring anchor cable according to the funtcional relationship of step a.
Further, among the step b, the detection of velocity of wave realizes by detector, described detector comprises probe, Data Receiving and modular converter, processor and output module, described probe is a sleeve-like configuration, is arranged on anchor cable and exposes the termination, is provided with acceleration transducer in the probe, the anchor cable vibration signal that described acceleration transducer is gathered amplifies the back input processor by Data Receiving and modular converter conversion, and processor obtains velocity of wave according to formula v=2L/T;
Further, among the step a, the funtcional relationship of determining velocity of wave and prestress coordinate curve is v=7E-122e
0.0544F, wherein v is a velocity of wave, and F is a prestress, and E is the scientific notation symbol, and e is a natural constant; Among the step c, by processor according to formula v=7E-122e
0.0544FObtain the prestress numerical value of anchoring anchor cable.
Beneficial effect of the present invention: the anchor lower prestress lossless detection method of prestressed strands such as anchor cable of the present invention, utilize the funtcional relationship between prestress and the velocity of wave to set up model, in anchor cable, excite elastic wave during detection, record the propagation velocity of wave of elastic wave, obtain the prestress numerical value corresponding according to the prestress and the funtcional relationship of velocity of wave with the survey velocity of wave, this method only needs the anchor cable revealed section is carried out exciting, do not destroy anchor structure itself or influence its serviceability, can test prestressing force under anchor of anchor rope, to controlling the construction quality of newly-built anchoring engineering, operation conditions and the security of grasping the existing anchorage engineering are significant.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is a principle of the invention block diagram;
Fig. 2 is apparatus of the present invention structural representation.
Embodiment
Fig. 1 is a principle of the invention block diagram, and Fig. 2 is apparatus of the present invention structural representation, and as shown in the figure: the lossless detection method of the prestressing force under anchor of anchor rope of present embodiment may further comprise the steps:
A. set up anchor cable 1 velocity of wave and prestress two-dimensional coordinate system, in the present embodiment, ordinate is a velocity of wave, and horizontal ordinate is a prestress;
At built-in vertical wave speed of two-dimensional coordinate system and prestress coordinate curve, determine that according to velocity of wave and prestress coordinate curve the funtcional relationship of velocity of wave and prestress coordinate curve is v=7E-122e
0.0544F, wherein v is a velocity of wave, and F is a prestress, and E is the scientific notation symbol, and e is a natural constant;
In built-in vertical wave speed of two-dimensional coordinate system and prestress coordinate curve is to obtain velocity of wave and prestress numerical value by the material object of anchor cable 1 is tested, and gets point-rendering according to the corresponding relation between the two;
B. to the revealed section end face moment impact of anchor cable 1 to be detected, record the velocity of wave of vibration wave in anchor cable that moment impact produces according to formula v=2L/T; Wherein v is a velocity of wave, and L is the length of anchor cable, and T is that vibration wave is from occurring to the time of returning;
In the present embodiment, the detection of velocity of wave realizes that by detector described detector (as shown in Figure 2) comprises probe 2, Data Receiving and modular converter 4, processor 5 and output module; Described probe is a sleeve-like configuration, is arranged on anchor cable 1 and exposes the termination, is provided with acceleration transducer in the probe, and this probe both can transmit excitation wave, can receive elastic wave again; The anchor cable outside is a corrugated tube 8, and anchor cable 1 vibration signal that described acceleration transducer is gathered is by Data Receiving and modular converter 4 conversions amplification back input processor 5, and processor 5 obtains velocity of wave according to formula v=2L/T; This step can directly be exported velocity of wave numerical value, and the detecting operation personnel directly obtain prestressing force under anchor of anchor rope numerical value by curve according to velocity of wave numerical value, and are simple to operate, the efficient height;
C. according to the velocity of wave numerical value that records from velocity of wave and prestress, according to formula v=7E-122e
0.0544FCalculate prestressing force under anchor of anchor rope numerical value.
Among the step b of present embodiment, 1 revealed section end face moment of anchor cable to be detected dashed by hand hammer 3 realize by hammering, simple to operate, construction cost is low, certainly, also the adjustable exciting device of the exciting force that can adopt other to carry acceleration transducer also can reach goal of the invention;
Output module comprises display device 6 and printing device 7, can directly show the numerical value and the printout that record, makes the operator can observe testing result and process intuitively, and is simple and easy to use.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. method for nondestructive detection of prestressing force under anchor of anchor rope is characterized in that: may further comprise the steps:
A. set up anchor cable velocity of wave and prestress two-dimensional coordinate system, and at the built-in vertical wave of two-dimensional coordinate system speed and prestress coordinate curve, determine the funtcional relationship of velocity of wave and prestress coordinate curve according to velocity of wave and prestress coordinate curve;
B. the revealed section at anchor cable excites elastic wave, records the velocity of wave of elastic wave in anchor cable according to formula v=2L/T; Wherein v is a velocity of wave, and L is the length of anchor cable, and to be elastic wave occur to the time of returning the revealed section end face from the revealed section end face of anchor cable to T;
C. according to the velocity of wave numerical value that records, calculate the prestress of anchoring anchor cable according to the funtcional relationship of step a.
2. method for nondestructive detection of prestressing force under anchor of anchor rope according to claim 1, it is characterized in that: among the step b, the detection of velocity of wave realizes by detector, described detector comprises probe, Data Receiving and modular converter, processor and output module, described probe is a sleeve-like configuration, be arranged on anchor cable and expose the termination, be provided with acceleration transducer in the probe, the anchor cable vibration signal that described acceleration transducer is gathered amplifies the back input processor by Data Receiving and modular converter conversion, and processor obtains velocity of wave according to formula v=2L/T.
3. method for nondestructive detection of prestressing force under anchor of anchor rope according to claim 2 is characterized in that: among the step a, the funtcional relationship of determining velocity of wave and prestress coordinate curve is v=7E-122e
0.0544F, wherein v is a velocity of wave, and F is a prestress, and E is the scientific notation symbol, and e is a natural constant; Among the step c, by processor according to formula v=7E～122e
0.0544FObtain the prestress numerical value of anchoring anchor cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910104354XA CN101650242B (en) | 2009-07-16 | 2009-07-16 | Method for nondestructive detection of prestressing force under anchor of anchor rope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910104354XA CN101650242B (en) | 2009-07-16 | 2009-07-16 | Method for nondestructive detection of prestressing force under anchor of anchor rope |
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| Publication Number | Publication Date |
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| CN101650242A true CN101650242A (en) | 2010-02-17 |
| CN101650242B CN101650242B (en) | 2011-06-22 |
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| CN200910104354XA Expired - Fee Related CN101650242B (en) | 2009-07-16 | 2009-07-16 | Method for nondestructive detection of prestressing force under anchor of anchor rope |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158334A (en) * | 2015-07-31 | 2015-12-16 | 山东大学 | Intelligent detection method of effective tension below flat anchor in hogging moment area |
| CN106950131A (en) * | 2017-03-16 | 2017-07-14 | 招商局重庆交通科研设计院有限公司 | Anchor structure steel beam working stress and the lossless detection method with beam unevenness |
| CN111060228A (en) * | 2019-12-18 | 2020-04-24 | 中国地质科学院探矿工艺研究所 | Method for detecting prestress of in-service anchor cable |
| CN112227208A (en) * | 2020-09-23 | 2021-01-15 | 中铁大桥局集团有限公司 | Monitoring and forecasting method for construction period and operation period of suspension bridge cable clamp screw |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2138792Y (en) * | 1992-02-27 | 1993-07-21 | 湖南省交通科学研究所 | Measurer for steel cable pulling force |
| US5996925A (en) * | 1997-03-03 | 1999-12-07 | Toray Engineering Co., Ltd. | Method and apparatus for detecting yarn tension and method for winding yarn |
| JP2001318011A (en) * | 2000-05-02 | 2001-11-16 | Toa Grout Kogyo Co Ltd | Method of measuring strain or tensile force of tension steel member |
| CN1156679C (en) * | 2002-12-17 | 2004-07-07 | 浙江大学 | Ultrasonic bolt fastening force measuring devcie |
| CN1963459A (en) * | 2006-10-31 | 2007-05-16 | 中国矿业大学 | Random lossless dynamical testing apparatus and method for anchor arm and anchoring |
| CN101419104B (en) * | 2008-11-28 | 2010-10-27 | 湖南科技大学 | Detecting based on concrete box beam bridge web vertical pre-stress rib stretching force |
-
2009
- 2009-07-16 CN CN200910104354XA patent/CN101650242B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158334A (en) * | 2015-07-31 | 2015-12-16 | 山东大学 | Intelligent detection method of effective tension below flat anchor in hogging moment area |
| CN105158334B (en) * | 2015-07-31 | 2018-01-19 | 山东大学 | Effective stretching force intelligent detecting method under the flat anchor anchor in hogging moment region |
| CN106950131A (en) * | 2017-03-16 | 2017-07-14 | 招商局重庆交通科研设计院有限公司 | Anchor structure steel beam working stress and the lossless detection method with beam unevenness |
| CN111060228A (en) * | 2019-12-18 | 2020-04-24 | 中国地质科学院探矿工艺研究所 | Method for detecting prestress of in-service anchor cable |
| CN112227208A (en) * | 2020-09-23 | 2021-01-15 | 中铁大桥局集团有限公司 | Monitoring and forecasting method for construction period and operation period of suspension bridge cable clamp screw |
| CN112227208B (en) * | 2020-09-23 | 2022-03-29 | 中铁大桥局集团有限公司 | Monitoring and forecasting method for construction period and operation period of suspension bridge cable clamp screw |
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| CN101650242B (en) | 2011-06-22 |
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