CN113566692A - Nondestructive testing method for quality of cable cement protection cover plate - Google Patents
Nondestructive testing method for quality of cable cement protection cover plate Download PDFInfo
- Publication number
- CN113566692A CN113566692A CN202110837027.6A CN202110837027A CN113566692A CN 113566692 A CN113566692 A CN 113566692A CN 202110837027 A CN202110837027 A CN 202110837027A CN 113566692 A CN113566692 A CN 113566692A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- steel bar
- quality
- nondestructive testing
- protective layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000004568 cement Substances 0.000 title claims abstract description 18
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 18
- 239000011241 protective layer Substances 0.000 claims abstract description 28
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 230000005674 electromagnetic induction Effects 0.000 claims description 11
- 238000010586 diagram Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 abstract description 11
- 239000011150 reinforced concrete Substances 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/12—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring diameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
Abstract
The invention relates to a nondestructive testing method for the quality of a cable cement protective cover plate, which is characterized in that a scanning signal oscillogram is obtained by scanning and quantifying a prefabricated reinforced concrete cover plate test piece, and the nondestructive testing of the thickness of the protective layer of the prefabricated reinforced concrete cover plate, the position of a reinforcing steel bar and the diameter of the reinforcing steel bar is realized by analyzing the distribution characteristics of the signal oscillogram. The method has important significance for improving the cover plate detection efficiency and the detection precision.
Description
Technical Field
The invention belongs to the field of nondestructive testing of concrete structures, relates to a cable cement protective cover plate, and particularly relates to a nondestructive testing method for the quality of the cable cement protective cover plate.
Background
The prefabricated reinforced concrete cover plate has the advantages of low cost, large mass, no recycling value and difficulty in losing, can prevent safety accidents caused by theft of the protective cover plate, and is commonly used for construction scenes such as transformer substation cable trench protective cover plates, underground cable trench protective cover plates and the like. However, in terms of construction conditions in China, the phenomena of few ribs, rib leakage, untight control of the thickness of a reinforcing steel bar protective layer and the like exist, and therefore the quality of the prefabricated reinforced concrete cover plate made of the steel fibers needs to be effectively guaranteed. If the quality construction control of the prefabricated reinforced fiber reinforced concrete cover plate does not meet the standard requirements of the standard design, the service life and the durability of the concrete structure are seriously influenced.
At present, most of the quality detection of the prefabricated reinforced concrete cover plate with the steel fiber is sampling damage detection in the existing method, and the whole batch of nondestructive detection of prefabricated parts is lacked.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a nondestructive testing method for the quality of a cable cement protective cover plate.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a nondestructive testing method for the quality of a cable cement protective cover plate comprises the following steps:
the method comprises the steps of firstly, obtaining enough standard component scanning signal oscillograms to form a scanning signal envelope graph, and calculating according to the scanning signal envelope graph to obtain distribution characteristics of waveform signals;
secondly, determining the numerical relationship between the distribution characteristics of the waveform signals and the thickness of the protective layer, the position of the steel bar and the diameter of the steel bar, and determining the fluctuation range of electromagnetic signal distribution characteristic values corresponding to different thicknesses of the protective layer, positions of the steel bar and diameters of the steel bar, wherein the position of the steel bar corresponds to an electromagnetic signal characteristic value Lmax1, the fluctuation error of Lmax2 is a, the diameter of the steel bar corresponds to an electromagnetic signal characteristic value Smax1, the fluctuation error of Smax2 is b, and the fluctuation range of the protective layer thickness corresponding to an electromagnetic signal characteristic value Smean is c-d;
thirdly, when a cover plate is measured specifically, two left and right peak values Smax1 and Smax2, the step distances Lmax1 and Lmax2 of the two peak values are found in a waveform diagram of the cover plate;
judging whether the diameters of the steel bars are qualified if both Smax1 and Smax2 are within the Smax +/-b range, or else, judging whether the diameters of the steel bars are unqualified;
judging whether the positions of the reinforcing steel bars are qualified if the Lmax1 and the Lmax2 are respectively within the ranges of (L-Lcen)/2 +/-a and (L + Lcen)/2 +/-a, or else, judging that the positions of the reinforcing steel bars are unqualified;
and calculating the mean value of the step distance in the range of [ (L-Lcen)/2, (L + Lcen)/2] as Smean, judging that if the Smean is in the range of [ c, d ], the thickness of the protective layer is qualified, otherwise, the thickness of the protective layer is unqualified.
Moreover, the scanning signal waveform diagram is obtained by an electromagnetic induction scanner.
Moreover, in the first step, the array of the scanning result needs to be stored first, and then the invalid value in the array is removed.
And the electromagnetic induction scanner is arranged on a track plate in a sliding way, and the track plate is positioned above the cover plate and is parallel to the cover plate in use.
And the cover plate is supported by the cover plate supporting body, and step parts capable of supporting two ends of the track plate are arranged at two ends of the top surface of the cover plate supporting body.
And the top surface of the track plate is provided with a track, and the electromagnetic induction scanner is provided with a track wheel.
The invention has the advantages and positive effects that:
the invention develops a nondestructive testing device specially used for detecting the thickness of a cover plate protective layer, the position of a reinforcing steel bar and the diameter of the reinforcing steel bar based on the electromagnetic induction principle by utilizing the characteristics of standard appearance, simple structure and single material of a prefabricated cover plate. The cover plate detection device can effectively and accurately detect the strength, the diameter of the steel bar and the thickness of the protective layer on the premise of not damaging the cover plate, and has important significance for improving the cover plate detection efficiency and the detection precision. Meanwhile, the method has a certain reference function on the development of the industry and the subsequent detection of the steel fiber concrete.
Drawings
FIG. 1 is a schematic view of a cable cement protective cover scanning device;
in the figure: the device comprises an electromagnetic induction scanner 1, a track plate 2, a cover plate 3 and a cover plate support 4.
FIG. 2 is a schematic top view of FIG. 1;
fig. 3 is a schematic diagram of a scanning signal waveform.
FIG. 4 is a flow chart of the operation of the detection device.
FIG. 5 is a waveform diagram of an actual scanning signal according to an embodiment.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
A nondestructive testing method for the quality of a cable cement protective cover plate is characterized in that a scanning signal oscillogram is obtained by scanning and quantifying a prefabricated reinforced concrete cover plate test piece, and the nondestructive testing of the thickness of the protective layer of the prefabricated reinforced concrete cover plate, the position of a reinforcing steel bar and the diameter of the reinforcing steel bar is realized by analyzing the distribution characteristics of the signal oscillogram.
The method comprises the following specific steps:
firstly, putting the standard component into a cable cement protective cover plate scanning device (see fig. 1 and 2) to carry out a scanning test, and acquiring a scanning signal waveform diagram of the standard component.
In the second step, a sufficient number of standard component scanning signal oscillograms (see fig. 3) are acquired through repeated scanning, and scanning signal envelope graphs are acquired.
And thirdly, counting by using a mathematical statistical method, and calculating the distribution characteristics of the waveform signal according to the scanning signal envelope diagram.
Fourthly, determining the numerical relationship between the distribution characteristics of the waveform signals and the thickness of the protective layer, the position of the reinforcing steel bar and the diameter of the reinforcing steel bar, and determining the fluctuation range of the electromagnetic signal distribution characteristic values corresponding to different thicknesses of the protective layer, positions of the reinforcing steel bar and diameters of the reinforcing steel bar: the position of the steel bar corresponds to the electromagnetic signal characteristic value Lmax1, the fluctuation error of Lmax2 is a, the diameter of the steel bar corresponds to the electromagnetic signal characteristic value Smax1, the fluctuation error of Smax2 is b, and the fluctuation range of the thickness of the protective layer corresponding to the electromagnetic signal characteristic value Smean is c-d.
And finally, realizing the nondestructive detection of the thickness of the protective layer of the prefabricated reinforced concrete cover plate, the position of the reinforcing steel bar and the diameter of the reinforcing steel bar by the following steps. The method comprises the following specific steps:
(1) storing a scanning result array: l [ i ], Si (L [ i ], Si are the ith step and ith signal value, respectively).
(2) And removing invalid values in the array, namely removing results with left and right zeros: l [ j ], S [ j ] (L [ j ], S [ j ] are the jth step and jth signal value, respectively), L ═ Lj (j ═ max (j)). And L is the total scanning step distance after zero at the left end and the right end is removed.
(3) Two left and right peaks Smax1, Smax2 are found, as well as their steps Lmax1, Lmax 2.
(4) And (3) checking whether the diameter of the steel bar is qualified by using a peak value: judging whether the diameters of the steel bars are qualified if both Smax1 and Smax2 are within the Smax +/-b range, or else, judging whether the diameters of the steel bars are unqualified.
(5) And (3) checking whether the position of the steel bar is qualified by using the step pitch: judging that the positions of the steel bars are qualified if the Lmax1 and the Lmax2 are respectively in the ranges of (L-Lcen)/2 +/-a and (L + Lcen)/2 +/-a, otherwise, the positions of the steel bars are unqualified.
Lcen is the step distance of the middle-crossing horizontal segment, and L is the total scanning step distance after zero at the left end and the right end is removed.
The mean value was used to check whether the protective layer thickness passed: and calculating the mean value of the step distance in the range of [ (L-Lcen)/2, (L + Lcen)/2] as Smean, judging that if the Smean is in the range of [ c, d ], the thickness of the protective layer is qualified, otherwise, the thickness of the protective layer is unqualified.
The nondestructive testing device for the quality of the cable cement protection cover plate comprises an electromagnetic induction scanner 1, a cover plate supporting body 4 and a track plate 2, wherein the cover plate supporting body is used for supporting a cover plate 3 to be in a horizontal state, the electromagnetic induction scanner is slidably mounted on the track plate, and the track plate is positioned above the cover plate and is parallel to the cover plate in use. Step parts capable of supporting two ends of the track plate are arranged at two ends of the top surface of the cover plate supporting body. The top surface of the track plate is provided with a track, and the electromagnetic induction scanner is provided with a track wheel.
Example (b):
firstly, placing a prefabricated reinforced concrete steel fiber cover plate test piece into a cable cement protective cover plate scanning device for scanning test to obtain a scanning signal oscillogram of a standard component.
In the second step, a sufficient number of standard component scanning signal oscillograms (see fig. 5) are acquired through repeated scanning, and scanning signal envelope graphs are acquired.
And thirdly, counting by using a mathematical statistical method, and calculating the distribution characteristics of the waveform signal according to the scanning signal envelope diagram.
Fourthly, determining the numerical relationship between the distribution characteristics of the waveform signals and the thickness of the protective layer, the position of the reinforcing steel bar and the diameter of the reinforcing steel bar, and determining the fluctuation range of the electromagnetic signal distribution characteristic values corresponding to different thicknesses of the protective layer, positions of the reinforcing steel bar and diameters of the reinforcing steel bar: the fluctuation range of the protective layer thickness corresponding to the electromagnetic signal characteristic value Smean is 6150-9000, the fluctuation error of the steel bar position corresponding to the electromagnetic signal characteristic value Lmax1 is 25, the fluctuation error of the Lmax2 is 25, the steel bar diameter corresponding to the electromagnetic signal characteristic value Smax1, and the fluctuation error of the Smax2 is 1240.
And (3) checking whether the diameter of the steel bar is qualified by using a peak value: and judging that the diameters of the steel bars are qualified if both Smax1 and Smax2 are within the range of Smax +/-1240, otherwise, the diameters of the steel bars are unqualified.
And (3) checking whether the position of the steel bar is qualified by using the step pitch: judging that the positions of the steel bars are qualified if the Lmax1 and the Lmax2 are respectively in the ranges of (L-Lcen)/2 +/-25 and (L + Lcen)/2 +/-25, otherwise, the positions of the steel bars are unqualified.
The mean value was used to check whether the protective layer thickness passed: and calculating the mean value of the step distance in the range of [ (L-Lcen)/2, (L + Lcen)/2] as Smean, judging that if the Smean is in the range of [6150,9000], the thickness of the protective layer is qualified, otherwise, the thickness of the protective layer is unqualified.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept, and these changes and modifications are all within the scope of the present invention.
Claims (6)
1. A nondestructive testing method for the quality of a cable cement protective cover plate is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the steps of firstly, obtaining enough standard component scanning signal oscillograms to form a scanning signal envelope graph, and calculating according to the scanning signal envelope graph to obtain distribution characteristics of waveform signals;
secondly, determining the numerical relationship between the distribution characteristics of the waveform signals and the thickness of the protective layer, the position of the steel bar and the diameter of the steel bar, and determining the fluctuation range of electromagnetic signal distribution characteristic values corresponding to different thicknesses of the protective layer, positions of the steel bar and diameters of the steel bar, wherein the position of the steel bar corresponds to an electromagnetic signal characteristic value Lmax1, the fluctuation error of Lmax2 is a, the diameter of the steel bar corresponds to an electromagnetic signal characteristic value Smax1, the fluctuation error of Smax2 is b, and the fluctuation range of the protective layer thickness corresponding to an electromagnetic signal characteristic value Smean is c-d;
thirdly, when a cover plate is measured specifically, two left and right peak values Smax1 and Smax2, the step distances Lmax1 and Lmax2 of the two peak values are found in a waveform diagram of the cover plate;
judging whether the diameters of the steel bars are qualified if both Smax1 and Smax2 are within the Smax +/-b range, or else, judging whether the diameters of the steel bars are unqualified;
judging whether the positions of the reinforcing steel bars are qualified if the Lmax1 and the Lmax2 are respectively within the ranges of (L-Lcen)/2 +/-a and (L + Lcen)/2 +/-a, or else, judging that the positions of the reinforcing steel bars are unqualified;
and calculating the mean value of the step distance in the range of [ (L-Lcen)/2, (L + Lcen)/2] as Smean, judging that if the Smean is in the range of [ c, d ], the thickness of the protective layer is qualified, otherwise, the thickness of the protective layer is unqualified.
2. The method for the nondestructive testing of the quality of the cable cement protective cover plate according to claim 1, wherein the method comprises the following steps: the scanning signal oscillogram is obtained by an electromagnetic induction scanner.
3. The method for the nondestructive testing of the quality of the cable cement protective cover plate according to claim 1, wherein the method comprises the following steps: in the first step, a scanning result array needs to be stored firstly, and then invalid values in the array are removed.
4. The method for the nondestructive testing of the quality of the cable cement protective cover plate according to claim 2, characterized in that: the electromagnetic induction scanner is slidably mounted on a track plate, and the track plate is positioned above the cover plate and is parallel to the cover plate in use.
5. The method for the nondestructive testing of the quality of the cable cement protective cover plate according to claim 4, wherein the method comprises the following steps: the cover plate is supported by the cover plate supporting body, and step parts capable of supporting two ends of the track plate are arranged at two ends of the top surface of the cover plate supporting body.
6. The method for the nondestructive testing of the quality of the cable cement protective cover plate according to claim 4, wherein the method comprises the following steps: the top surface of the track plate is provided with a track, and the electromagnetic induction scanner is provided with a track wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110837027.6A CN113566692B (en) | 2021-07-23 | 2021-07-23 | Nondestructive testing method for quality of cable cement protection cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110837027.6A CN113566692B (en) | 2021-07-23 | 2021-07-23 | Nondestructive testing method for quality of cable cement protection cover plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113566692A true CN113566692A (en) | 2021-10-29 |
| CN113566692B CN113566692B (en) | 2023-12-08 |
Family
ID=78166841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110837027.6A Active CN113566692B (en) | 2021-07-23 | 2021-07-23 | Nondestructive testing method for quality of cable cement protection cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113566692B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147548A (en) * | 2023-04-19 | 2023-05-23 | 西南林业大学 | Nondestructive testing method and system for thickness of steel fiber RPC cover plate |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3535117C1 (en) * | 1985-10-02 | 1986-12-18 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Method and device for measuring ferromagnetic objects laid in non-magnetic materials |
| DE19841325A1 (en) * | 1997-09-26 | 1999-04-08 | Nix Steingroeve Elektro Physik | Nondestructive method to determine position-course of metal body in non metallic magnetic material |
| JP4038578B1 (en) * | 2006-08-01 | 2008-01-30 | 国立大学法人山口大学 | Apparatus and method for nondestructive inspection of reinforced concrete structures by electromagnetic waves |
| JP2008232852A (en) * | 2007-03-20 | 2008-10-02 | Yamaguchi Univ | Non-destructive measuring instrument and non-destructive measuring method for measuring reinforcement diameter in reinforced concrete structure by electromagnetic wave radar |
| CN103018337A (en) * | 2012-12-25 | 2013-04-03 | 上海交通大学 | Surface wave-based nondestructive testing method and system for internal concrete state |
| CN104634238A (en) * | 2015-02-16 | 2015-05-20 | 中交第二航务工程局有限公司 | Method and device for measuring reinforcement protective layer thickness |
| JP2018132426A (en) * | 2017-02-15 | 2018-08-23 | 国立研究開発法人物質・材料研究機構 | Reinforcement diameter of ferroconcrete, measuring device of covering, and reinforcement arrangement direction measuring method |
| CN108981557A (en) * | 2018-09-05 | 2018-12-11 | 广州大学 | Detection method that is a kind of while measuring reinforcement in concrete diameter and its protective layer thickness |
| CN110261915A (en) * | 2019-06-14 | 2019-09-20 | 北京海创高科科技有限公司 | A kind of armored concrete bar construction scan method and scanner based on electromagnetic induction |
| CN209857817U (en) * | 2019-04-29 | 2019-12-27 | 浙江交工路桥建设有限公司 | A calibrating device for reinforcing bar protective layer thickness apparatus |
| CN111854666A (en) * | 2020-07-09 | 2020-10-30 | 广东雄炜建筑工程检测有限公司 | Method for scanning steel bars and detecting thickness of concrete protection layer |
| CN212903119U (en) * | 2020-07-09 | 2021-04-06 | 广东雄炜建筑工程检测有限公司 | Reinforcing bar scanning and concrete protective layer thickness detection device |
| CN112630270A (en) * | 2020-12-28 | 2021-04-09 | 青岛理工大学 | Method for detecting state of reinforcing steel bar in concrete structure |
-
2021
- 2021-07-23 CN CN202110837027.6A patent/CN113566692B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3535117C1 (en) * | 1985-10-02 | 1986-12-18 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München | Method and device for measuring ferromagnetic objects laid in non-magnetic materials |
| DE19841325A1 (en) * | 1997-09-26 | 1999-04-08 | Nix Steingroeve Elektro Physik | Nondestructive method to determine position-course of metal body in non metallic magnetic material |
| JP4038578B1 (en) * | 2006-08-01 | 2008-01-30 | 国立大学法人山口大学 | Apparatus and method for nondestructive inspection of reinforced concrete structures by electromagnetic waves |
| JP2008232852A (en) * | 2007-03-20 | 2008-10-02 | Yamaguchi Univ | Non-destructive measuring instrument and non-destructive measuring method for measuring reinforcement diameter in reinforced concrete structure by electromagnetic wave radar |
| CN103018337A (en) * | 2012-12-25 | 2013-04-03 | 上海交通大学 | Surface wave-based nondestructive testing method and system for internal concrete state |
| CN104634238A (en) * | 2015-02-16 | 2015-05-20 | 中交第二航务工程局有限公司 | Method and device for measuring reinforcement protective layer thickness |
| JP2018132426A (en) * | 2017-02-15 | 2018-08-23 | 国立研究開発法人物質・材料研究機構 | Reinforcement diameter of ferroconcrete, measuring device of covering, and reinforcement arrangement direction measuring method |
| CN108981557A (en) * | 2018-09-05 | 2018-12-11 | 广州大学 | Detection method that is a kind of while measuring reinforcement in concrete diameter and its protective layer thickness |
| CN209857817U (en) * | 2019-04-29 | 2019-12-27 | 浙江交工路桥建设有限公司 | A calibrating device for reinforcing bar protective layer thickness apparatus |
| CN110261915A (en) * | 2019-06-14 | 2019-09-20 | 北京海创高科科技有限公司 | A kind of armored concrete bar construction scan method and scanner based on electromagnetic induction |
| CN111854666A (en) * | 2020-07-09 | 2020-10-30 | 广东雄炜建筑工程检测有限公司 | Method for scanning steel bars and detecting thickness of concrete protection layer |
| CN212903119U (en) * | 2020-07-09 | 2021-04-06 | 广东雄炜建筑工程检测有限公司 | Reinforcing bar scanning and concrete protective layer thickness detection device |
| CN112630270A (en) * | 2020-12-28 | 2021-04-09 | 青岛理工大学 | Method for detecting state of reinforcing steel bar in concrete structure |
Non-Patent Citations (1)
| Title |
|---|
| 曲金辉;: "混凝土中钢筋保护层厚度检测准确性分析", 上海建设科技, no. 01, pages 63 - 66 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116147548A (en) * | 2023-04-19 | 2023-05-23 | 西南林业大学 | Nondestructive testing method and system for thickness of steel fiber RPC cover plate |
| CN116147548B (en) * | 2023-04-19 | 2023-07-25 | 西南林业大学 | Nondestructive testing method and system for thickness of steel fiber RPC cover plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113566692B (en) | 2023-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113566692A (en) | Nondestructive testing method for quality of cable cement protection cover plate | |
| CN101971016B (en) | Nondestructive testing system for steel workpiece | |
| CN1975406B (en) | Ferromagnetic component surface defect far field magnetic field detecting method and apparatus | |
| CN108181377B (en) | Intelligent interpretation system and method for broken PCCP steel wire | |
| Schindler | Experimental determination of crack closure by the cut compliance technique | |
| CN110160437A (en) | A kind of protective layer thickness test method of the separate type reinforcing bar based on ECC | |
| CN215261608U (en) | Nondestructive testing device for quality of cable cement protection cover plate | |
| CN205919806U (en) | Measuring mechanism and inequality detection device of axial lead distance are arrived to cable contact surface | |
| CN108317987A (en) | Sample for evaluating thickness detection quality of engineering structure entity steel bar protective layer | |
| CN109472117B (en) | Quantitative nondestructive evaluation method for residual stress distribution of area near nuclear power plant structural crack | |
| CN110967474A (en) | Building strength detection method | |
| CN115451800A (en) | Testing method of portable field testing imager for cement electric pole | |
| CN2434677Y (en) | Metal magnetic memory diagnosis instrument | |
| CN204630542U (en) | Based on the pressure vessel ellipsoidal head testing instruments of ellipsograph | |
| CN210198307U (en) | Cement-based material corrugated pipe volume deformation tester | |
| CN113155011A (en) | Protective layer thickness detection method based on environmental calibration | |
| CN113406192A (en) | U-shaped magnetic conductor focusing probe and pulse eddy current detection method thereof | |
| CN111537348A (en) | Test device and test method for measuring axial tensile property of large-diameter fiber reinforced composite pipe | |
| CN215572947U (en) | Building engineering quality detection ruler | |
| CN212721223U (en) | Supervision detects roof beam cross-section size instrument | |
| CN217818408U (en) | Prefabricated component quality testing is with fixed slide caliper rule | |
| CN215064215U (en) | Special measuring and detecting equipment for construction sleeve | |
| CN219368585U (en) | Measuring device for vertical metal can peripheral ruler method | |
| CN213876016U (en) | Cement base plate material shrinkage continuous detection device based on laser ranging | |
| CN220894212U (en) | Special test block for pipeline pulse vortex detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |