CN110824007B - Tubular pile crack detection method and system - Google Patents
Tubular pile crack detection method and system Download PDFInfo
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- CN110824007B CN110824007B CN201911127997.6A CN201911127997A CN110824007B CN 110824007 B CN110824007 B CN 110824007B CN 201911127997 A CN201911127997 A CN 201911127997A CN 110824007 B CN110824007 B CN 110824007B
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- 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
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- 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
- G01N29/4445—Classification of defects
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- 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
- G01N29/48—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by amplitude comparison
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- 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
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- 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
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Abstract
The invention relates to the technical field of pipe pile detection, and discloses a method and a system for detecting a crack of a pipe pile, wherein the method comprises the steps of applying an instantaneous load at the pile top of the pipe pile, respectively collecting circumferential and vertical acceleration response data, processing the data to obtain circumferential and vertical speed time-course curves, and judging whether a pile body has a transverse or vertical crack defect or not according to the curve disturbance amplitude between an incident wave and a reflected wave at the bottom of the pile in the curves; the method comprehensively utilizes the circumferential and vertical speed response of the pile top to judge the integrity of the tubular pile, not only can identify the transverse cracks, but also can identify the vertical cracks, and has practical value.
Description
Technical Field
The invention relates to the technical field of tubular pile detection, in particular to a tubular pile crack detection method and system.
Background
Due to improper handling during transportation or construction, the tube pile is often cracked, and particularly, the vertical crack is the most common crack. At present, common methods for judging the integrity of a foundation pile comprise a core drilling method, a low-strain reflection wave method and a sound wave transmission method. The low-strain pile bottom reflection wave testing process is simple, and the detecting instrument is convenient to carry and widely applied.
The theoretical basis of the traditional low-strain reflected wave is a one-dimensional longitudinal wave (or compression wave) theory, and the method is characterized in that a vertical transient load is applied to the pile top, and a single-component sensor placed on the pile top is used for acquiring a vertical vibration speed signal. The excited stress wave encounters defects (such as pile breakage, necking, severe cracks and the like) and generates reflection and transmission, and the pile top sensor can receive the reflection signals and can be used for judging the degree and the position of the defects of the pile body and determining the integrity type. However, the conventional low-strain reflection wave method only depends on the vertical speed signal to judge the integrity of the pipe pile, and the defect of a vertical crack is difficult to identify.
Considering that the tubular pile is hollow, and an excitation mode adopted by the tubular pile detection has non-axial symmetry, the pile top has a strong circumferential vibration signal in addition to a vertical vibration signal. However, the conventional low-strain pile bottom reflected wave only focuses on the vertical vibration signal, but neglects the contribution of the annular vibration signal, so that the common defect of the pipe pile, namely the vertical crack, is difficult to detect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a system for detecting a crack of a tubular pile, which are used for solving the problems and accurately judging the integrity of the tubular pile.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a tubular pile crack detection method is characterized by comprising the following steps:
applying instantaneous load at the vibration excitation point of the pile top of the pipe pile;
respectively collecting circumferential and vertical acceleration response data at a collecting point of the pile top of the tubular pile, wherein the circumferential included angle between the excitation point and the collecting point is 75-105 degrees;
processing the circumferential acceleration response data and the vertical acceleration response data to obtain circumferential speed time-course curves and vertical speed time-course curves;
and judging whether the pile body has the defect of a transverse or vertical crack according to the curve disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the annular or vertical speed time-course curve.
Preferably, the collection point is located at the center of the wall thickness of the pile top of the tubular pile.
Preferably, the circumferential included angle between the excitation point and the collection point is 90 degrees, and the instantaneous load is a vertical load.
Preferably, the processing the circumferential and vertical acceleration response data comprises:
respectively carrying out numerical integration on the circumferential acceleration response data and the vertical acceleration response data to obtain circumferential velocity time-course curves and vertical velocity time-course curves;
preferably, the judging whether the pile body has a transverse or vertical crack defect specifically includes:
analyzing the obtained circumferential and vertical speed time-course curves:
if the curve disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile is within the set threshold range and no reflection peak exists, judging that the pile body is complete;
if the disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the vertical velocity curve and the annular velocity curve exceeds a set threshold value and a defective reflection peak exists, judging that the pile body has a transverse crack defect;
and if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the vertical velocity curve is within the set threshold range and has no defect reflection peak, and the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the circumferential velocity curve exceeds the set threshold and has a defect reflection peak, judging that the pile body has the defect of the vertical crack.
The invention also provides a tubular pile crack detection system, which comprises a data acquisition module and a data processing module, wherein the data acquisition module is arranged at an acquisition point of the pile top of the tubular pile and is used for acquiring the circumferential vibration data and the vertical vibration data at the same position of the pile top and sending the acquired data into the data processing module for data storage and processing;
the data processing module is used for receiving and storing the annular vibration data and the vertical vibration data, and performing numerical integration on the annular acceleration response data and the vertical acceleration response data respectively to obtain annular speed time-course curves and vertical speed time-course curves.
Preferably, the data acquisition module is a two-component acceleration sensor.
Preferably, the data processing module is a two-channel foundation pile dynamic measuring instrument.
Preferably, the system further comprises a judging and processing module, wherein the judging and processing module is used for judging whether the pile body has a transverse or vertical crack defect according to the annular and vertical speed time-course curves, and specifically comprises:
analyzing the obtained circumferential and vertical speed time-course curves:
if the curve disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile is within the set threshold range and no reflection peak exists, judging that the pile body is complete;
if the disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the vertical velocity curve and the annular velocity curve exceeds a set threshold value and a defective reflection peak exists, judging that the pile body has a transverse crack defect;
and if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the vertical velocity curve is within the set threshold range and has no defect reflection peak, and the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the circumferential velocity curve exceeds the set threshold and has a defect reflection peak, judging that the pile body has the defect of the vertical crack.
Preferably, the system further comprises a load generation module, wherein the load generation module is used for generating instantaneous load with preset parameters at the pile top of the tubular pile according to requirements so as to generate stress waves which are propagated in the annular direction and the vertical direction in the tubular pile.
Compared with the prior art, the invention has the following beneficial effects:
according to the method for detecting the crack of the tubular pile, disclosed by the invention, the annular and vertical speed responses of the pile top are comprehensively utilized, the integrity of the tubular pile is judged, not only a transverse crack can be identified, but also a vertical crack can be identified, and the defect that the vertical crack cannot be detected because only a vertical speed signal is acquired in the traditional method is overcome;
in addition, the data acquisition points and the excitation points are arranged at an annular included angle, particularly when the angle is 90 degrees, the interference on a vertical speed signal can be reduced, the influence of three-dimensional interference on the annular speed signal can be effectively avoided, excellent signal feedback is obtained in the vertical direction and the annular direction, and the detection result is more accurate;
meanwhile, the method is simple, the annular and vertical vibration signals can be directly acquired by using the dual-channel foundation pile dynamic measuring instrument, the annular vibration data and the vertical vibration data of the same position of the pile top are acquired by creatively using the two-component acceleration sensor, and the reduction of the accuracy of the detection result caused by the abnormal vibration data caused by the position error of the sub-sensor is avoided.
Further salient features and significant advances with respect to the present invention over the prior art are described in further detail in the examples section.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of the connection of a pile top excitation point, a two-component acceleration sensor, a two-channel pile foundation dynamic tester and a tubular pile according to the invention;
FIG. 2 is a schematic diagram of the time-course curves of the vertical and circumferential velocities of the pile top detected by the complete pile according to the present invention;
FIG. 3a is a schematic diagram of a time course curve of the circumferential velocity of the pile top detected by the vertical cracked pile according to the present invention;
FIG. 3b is a schematic diagram of a time-course curve of the vertical velocity of the pile top detected by the vertical cracked pile according to the present invention;
FIG. 4a is a schematic diagram of a time course curve of the circumferential velocity of the pile top detected by the transverse fractured pile according to the present invention;
FIG. 4b is a schematic diagram of a time course curve of the pile top vertical velocity detected by the transverse fractured pile of the present invention;
fig. 5 is a schematic structural diagram of a pipe pile crack detection system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that certain names are used throughout the specification and claims to refer to particular components. It will be understood that one of ordinary skill in the art may refer to the same component by different names. The present specification and claims do not intend to distinguish between components that differ in name but not function. As used in this specification and the appended claims, the term "comprising" is an open-ended term that is to be interpreted as "including, but not limited to," or "including, but not limited to. The embodiments described in the detailed description are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention.
Moreover, those skilled in the art will appreciate that aspects of the present invention may be embodied as a system, method or computer program product. Accordingly, various aspects of the present invention may be embodied in a combination of hardware and software, which may be referred to herein generally as a "circuit," module "or" system. Furthermore, in some embodiments, various aspects of the invention may also be embodied in the form of a computer program product in one or more microcontroller-readable media having microcontroller-readable program code embodied therein.
Example 1
The embodiment provides a method for detecting a crack of a tubular pile, which comprises the following steps:
applying instantaneous load at the excitation point of the pile top of the tubular pile, wherein the instantaneous load is in the vertical direction, and generally generating stress waves with the pulse width of 0.8-1.5 ms;
respectively collecting circumferential acceleration response data and vertical acceleration response data at a collecting point of the pile top of the tubular pile, wherein the circumferential included angle between an excitation point and the collecting point is 75-105 degrees; wherein the collecting point is positioned at the center of the wall thickness of the pile top of the tubular pile.
The processing of the annular and vertical acceleration response data specifically comprises:
respectively carrying out numerical integration on the circumferential acceleration response data and the vertical acceleration response data to obtain circumferential velocity time-course curves and vertical velocity time-course curves;
according to the curve smoothness degree between the incident wave and the pile bottom reflection wave in the annular or vertical speed time-course curve, whether the pile body has a horizontal or vertical crack defect is judged, and the method specifically comprises the following steps:
analyzing the obtained circumferential and vertical speed time-course curves:
if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave of the two waves is within a set threshold range and no defect reflection peak exists, judging that the pile body is complete, wherein the threshold range can be preset according to the detection requirement;
if the disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the vertical velocity curve and the annular velocity curve exceeds a set threshold value and a defective reflection peak exists, judging that the pile body has a transverse crack defect;
and if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the vertical velocity curve is within the set threshold range and has no defect reflection peak, and the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the annular velocity curve exceeds the set threshold and has a defect reflection peak, judging that the pile body has a vertical crack defect.
Example 2
Referring to fig. 5, a tubular pile crack detection system includes a data acquisition module and a data processing module, wherein the data acquisition module is arranged at an acquisition point of a tubular pile top and is used for acquiring circumferential vibration data and vertical vibration data at the same position of the pile top and sending the acquired data to the data processing module for data storage and processing;
the data processing module is used for receiving and storing the circumferential vibration data and the vertical vibration data and performing numerical integration on the circumferential acceleration response data and the vertical acceleration response data to obtain circumferential speed time-course curves and vertical speed time-course curves.
The data acquisition module in this embodiment is a two-component acceleration sensor.
The data processing module in the embodiment is a double-channel foundation pile dynamic measuring instrument.
The detecting system in this embodiment further includes a judging and processing module, the judging and processing module is used for judging whether the pile body has a horizontal or vertical crack defect according to the annular and vertical speed time course curves, and specifically includes:
analyzing the obtained circumferential and vertical speed time-course curves:
if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave of the two waves is within a set threshold range and no reflection peak exists, judging that the pile body is complete;
if the disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the vertical velocity curve and the annular velocity curve exceeds a set threshold value and a defective reflection peak exists, judging that the pile body has a transverse crack defect;
and if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the vertical velocity curve is within the set threshold range and has no defect reflection peak, and the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the annular velocity curve exceeds the set threshold and has a defect reflection peak, judging that the pile body has a vertical crack defect.
The detection system in this embodiment still includes the load and produces the module, the load produces the module and is used for producing the instantaneous load of predetermineeing the parameter at tubular pile top as required to produce the stress wave along hoop and vertical propagation in the tubular pile.
In order to further explain embodiments 1 and 2, the following practical tube pile is taken as an example to be detected by using the detection method and the detection system, specifically:
the length of the tubular pile used in the test is 7m, the outer diameter of the pile body is 50cm, and the wall thickness is 10cm;
the test tubular pile is divided into a complete tubular pile, a tubular pile with a transverse crack and a tubular pile with a vertical crack;
wherein the horizontal and vertical cracks are 40cm long and 4mm wide and penetrate through the wall thickness,
wherein the starting point of the vertical crack is 2m away from the pile top, and the terminal point is 2.4m away from the pile top; the transverse crack is 2m away from the pile top.
As shown in the attached figure 1, a two-component acceleration sensor 2 is arranged at the center of the wall thickness of the pile top of the pipe pile; the acceleration sensor 2 is connected to a two-channel foundation pile dynamometer 3.
Applying a vertical instantaneous load on an excitation point 1 which forms an included angle of 90 degrees with the annular direction of the acceleration sensor 2, generating stress waves after the excitation point is subjected to the action of the instantaneous load, measuring the response of the annular direction and the vertical direction acceleration by the two-component acceleration sensor, and conveying the response to a double-channel foundation pile dynamic measuring instrument 3;
integrating the circumferential acceleration time-course curve and the vertical acceleration time-course curve by the double-channel foundation pile dynamic measuring instrument 3 to obtain corresponding circumferential speed time-course curves and vertical speed time-course curves;
referring to fig. 2, a complete pile test result is used, and a circumferential incident wave 21, a circumferential pile bottom reflected wave 22, a pile top vertical incident wave 23 and a pile bottom vertical pile bottom reflected wave 24 can be obtained from the figure, and it can be seen from the figure that curves between the circumferential incident wave 21 and the pile bottom reflected wave 22 and between the vertical incident wave 23 and the pile bottom reflected wave 24 are smooth, no defect reflected wave is generated, and therefore the pipe pile is complete.
Referring to fig. 3a and 3b, a tubular pile with a vertical crack is used for detection, so that a circumferential incident wave 31 and a circumferential reflected wave 32 can be obtained from fig. 3a or 3b, a vertical incident wave 33 at the top of the tubular pile and a vertical reflected wave 34 at the bottom of the tubular pile can be seen, a curve between the circumferential incident wave 31 and the reflected wave 32 at the bottom of the tubular pile is not smooth, a curve between the vertical incident wave 33 and the reflected wave 34 at the bottom of the tubular pile in an obvious defect reflection peak 35,3b is smooth, no defect reflected wave is generated, and therefore the tubular pile has the vertical crack.
Referring to fig. 4a and 4b, by using a tubular pile with a transverse crack for detection, a circumferential incident wave 44 and a circumferential pile bottom reflected wave 45, a pile top vertical incident wave 41 and a pile bottom vertical pile bottom reflected wave 42 can be obtained from fig. 4a or 4b, and it can be seen in fig. 4a that a curve between the circumferential incident wave 44 and the circumferential pile bottom reflected wave 45 is not smooth and has an obvious defect reflection peak 46, and in fig. 4b, an obvious defect reflection peak 43 also exists between the vertical incident wave 41 and the pile bottom vertical pile bottom reflected wave 42, so that the tubular pile has a transverse crack.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place. Or may be distributed over multiple network elements. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention.
And the aforementioned storage medium includes: a U disk, a mobile hard disk, and a Read-Only Memory (ROM). Various media capable of storing program check codes, such as a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A tubular pile crack detection method is characterized by comprising the following steps:
applying instantaneous load at the excitation point of the pile top of the tubular pile, wherein the instantaneous load is vertical load;
respectively acquiring circumferential and vertical acceleration response data of the same position of the pile top at an acquisition point of the pile top of the tubular pile, wherein the circumferential included angle between an excitation point and the acquisition point is 75-105 degrees, and the acquisition point is positioned at the center of the wall thickness of the pile top of the tubular pile;
processing the circumferential and vertical acceleration response data to obtain circumferential and vertical speed time-course curves;
judging whether the pile body has a transverse or vertical crack defect or not according to the curve disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the annular or vertical speed time-course curve;
the processing the circumferential and vertical acceleration response data comprises:
respectively carrying out numerical integration on the circumferential acceleration response data and the vertical acceleration response data to obtain circumferential acceleration time-course curves and vertical acceleration time-course curves;
judging whether the pile body has a transverse or vertical crack defect specifically includes:
analyzing the obtained circumferential and vertical speed time-course curves:
if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave of the two waves is within a set threshold range and no reflection peak exists, judging that the pile body is complete;
if the disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the vertical velocity curve and the annular velocity curve exceeds a set threshold value and a defective reflection peak exists, judging that the pile body has a transverse crack defect;
and if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the vertical velocity curve is within the set threshold range and has no defect reflection peak, and the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the annular velocity curve exceeds the set threshold and has a defect reflection peak, judging that the pile body has a vertical crack defect.
2. The method for detecting the crack of the tubular pile according to claim 1, wherein an included angle between the excitation point and the collection point is 90 degrees.
3. A tubular pile crack detection system is characterized in that the method of claim 1 is adopted for tubular pile crack detection, and the system comprises a data acquisition module and a data processing module, wherein the data acquisition module is arranged at an acquisition point of the pile top of a tubular pile and is used for acquiring circumferential vibration data and vertical vibration data of the same position of the pile top and sending the acquired data into the data processing module for data storage and processing;
the data processing module is used for receiving and storing the circumferential vibration data and the vertical vibration data and performing numerical integration on the circumferential acceleration response data and the vertical acceleration response data to obtain circumferential speed time-course curves and vertical speed time-course curves.
4. The system of claim 3, wherein the data acquisition module is a two-component acceleration sensor.
5. The system of claim 3, wherein the data processing module is a dual-channel foundation pile motion measuring instrument.
6. The tubular pile crack detection system of claim 3, characterized in that, the system is still including judging processing module, it is used for according to hoop and vertical speed time course curve to judge whether the pile body has horizontal or vertical crack defect specifically including to judge:
analyzing the obtained circumferential and vertical speed time-course curves:
if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave of the two waves is within a set threshold range and no reflection peak exists, judging that the pile body is complete;
if the disturbance amplitude between the incident wave and the reflected wave at the bottom of the pile in the vertical velocity curve and the annular velocity curve exceeds a set threshold value and a defective reflection peak exists, judging that the pile body has a transverse crack defect;
and if the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the vertical velocity curve is within the set threshold range and has no defect reflection peak, and the curve disturbance amplitude between the incident wave and the pile bottom reflected wave in the annular velocity curve exceeds the set threshold and has a defect reflection peak, judging that the pile body has a vertical crack defect.
7. The system of claim 3, further comprising a load generation module for generating instantaneous loads of preset parameters at the pile top of the tubular pile as required to generate stress waves in the tubular pile that propagate in the circumferential and vertical directions.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877490A (en) * | 2012-09-18 | 2013-01-16 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
| CN105510435A (en) * | 2015-11-27 | 2016-04-20 | 航天晨光股份有限公司 | Method for detecting defects of metal bellows based on laser vibration |
| CN106198738A (en) * | 2016-08-30 | 2016-12-07 | 西安热工研究院有限公司 | A kind of localization method of rayleigh waves inspection small diameter tube longitudinal defect |
| CN208224123U (en) * | 2018-06-06 | 2018-12-11 | 湖南湘建检测有限公司 | Pile for prestressed pipe vertically and horizontally crack detecting device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103994921B (en) * | 2014-06-12 | 2016-04-06 | 江西理工大学 | Based on the Characters of Weak Intercalation in Layered Rock Mass elastic modulus method of testing of wavelet waveforms Changing Pattern |
| CN104228886B (en) * | 2014-09-26 | 2017-07-11 | 中国科学院上海高等研究院 | Urban rail transit vehicles day-to-day operation state measurement strategy |
| CN106677232B (en) * | 2016-12-30 | 2018-12-18 | 华中科技大学 | Wave excitation capturing analysis method is cut in a kind of torsion for pile detection |
-
2019
- 2019-11-18 CN CN201911127997.6A patent/CN110824007B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877490A (en) * | 2012-09-18 | 2013-01-16 | 河海大学 | Method for detecting quality of large-diameter tubular pile at low strain |
| CN105510435A (en) * | 2015-11-27 | 2016-04-20 | 航天晨光股份有限公司 | Method for detecting defects of metal bellows based on laser vibration |
| CN106198738A (en) * | 2016-08-30 | 2016-12-07 | 西安热工研究院有限公司 | A kind of localization method of rayleigh waves inspection small diameter tube longitudinal defect |
| CN208224123U (en) * | 2018-06-06 | 2018-12-11 | 湖南湘建检测有限公司 | Pile for prestressed pipe vertically and horizontally crack detecting device |
Non-Patent Citations (2)
| Title |
|---|
| 浅析有缺陷PHC桩的检测与处理方法;张杰 等;《西部探矿工程》;20080930(第9期);第23-25页 * |
| 纵向应力波对裂纹探测研究;徐新生 等;《河南大学学报（自然科学版）》;19950630;第25卷(第2期);第7-12，25页 * |
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