CN108317987B - Sample for evaluating thickness detection quality of reinforcement protection layer of engineering structure entity - Google Patents
Sample for evaluating thickness detection quality of reinforcement protection layer of engineering structure entity Download PDFInfo
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- CN108317987B CN108317987B CN201810174563.0A CN201810174563A CN108317987B CN 108317987 B CN108317987 B CN 108317987B CN 201810174563 A CN201810174563 A CN 201810174563A CN 108317987 B CN108317987 B CN 108317987B
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- stirrup
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- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 230000002787 reinforcement Effects 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000004698 Polyethylene Substances 0.000 claims abstract description 9
- -1 polyethylene Polymers 0.000 claims abstract description 9
- 229920000573 polyethylene Polymers 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 26
- 239000000758 substrate Substances 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 10
- 210000003205 muscle Anatomy 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 5
- 239000000049 pigment Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 24
- 239000010959 steel Substances 0.000 abstract description 24
- 238000010276 construction Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 10
- 239000004567 concrete Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 102100036219 Cyclic nucleotide-gated olfactory channel Human genes 0.000 description 2
- 101000875054 Homo sapiens Cyclic nucleotide-gated olfactory channel Proteins 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007429 general method Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sample for evaluating the thickness detection quality of a reinforcement protection layer of an engineering structure entity, which comprises a base material made of a high polymer polyethylene material, wherein a plurality of main reinforcements and a plurality of stirrups are arranged in the base material, and the main reinforcements and the stirrups are round steel bars. The invention has the beneficial effects that: the method can be used for evaluating the precision and accuracy of the detection result of the thickness of the reinforcement protection layer of the engineering structure entity, and solves the problem that the laboratory in the construction field is difficult to effectively evaluate the repeatability precision, the middle precision, the reproducibility precision and the accuracy of the detection result of the thickness of the reinforcement protection layer.
Description
Technical Field
The invention relates to the technical field of inspection devices, in particular to a sample for evaluating the thickness detection quality of a reinforcing steel bar protection layer of an engineering structure entity.
Background
The general method flow of the detection of the thickness of the reinforcement protection layer of the solid beam member of the construction engineering structure is to judge the positions of the main reinforcement and the stirrup in the beam member (reinforced concrete) by the movement of the reinforcement detector on the surface of the beam member and detect the minimum linear distance from the main reinforcement to the reinforced concrete surface.
However, there is no effective way to evaluate the precision and accuracy of the thickness detection result of the reinforcement protection layer, so that misjudgment may occur on the positions of the main reinforcement and the stirrup, and a larger error may occur on the detection value of the main reinforcement.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides a sample for evaluating the detection quality of the thickness of the reinforcement protection layer of the engineering structure entity, which can be used for evaluating the repeatability precision, the middle precision, the reproducibility precision and the accuracy of the detection result of the thickness of the reinforcement protection layer in a laboratory in the construction field.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the utility model provides a sample for evaluating engineering structure entity protective layer thickness detection quality, includes the substrate of being made by polymer polyethylene material, inside a plurality of main muscle and the a plurality of stirrup of being provided with of substrate, main muscle and stirrup are round bar.
Further, the number of the main reinforcements and the stirrups is two.
Further, carbon black pigment is added to the high molecular polyethylene material.
Further, the shape of the base material is cuboid, and a cross coordinate line is arranged at the top of the base material.
Further, the four sides of the base material are respectively provided with a mounting hole for inserting the main bar or the stirrup and a side sealing plate for sealing the mounting hole.
The invention also provides a use method of the sample for evaluating the detection quality of the thickness of the protective layer of the steel bar of the engineering structure entity, which comprises the following steps:
s1, mounting a main reinforcement in a lower part and a stirrup in an upper part in a base material, and measuring position data of the main reinforcement and the stirrup and the minimum linear distance from the main reinforcement to the top of the base material as characteristic values by a vernier caliper;
s2, detecting the distance from the steel bar inside the base material to the top of the base material by using a steel bar detector, taking the steel bar with larger distance from the top of the base material as a main steel bar, taking the steel bar with smaller distance from the top of the base material as a stirrup, obtaining position detection data of the main steel bar and the stirrup, detecting the distance from the main steel bar to the top of the base material, selecting the minimum value of the position detection data as the minimum linear distance detection data from the main steel bar to the top of the base material, and taking the position detection data and the minimum linear distance detection data as detection values;
s3, comparing the detection value with the characteristic value to obtain the accuracy of the detection value;
s4 repeating S2 and S3 to obtain repeatability precision, intermediate precision and reproducibility precision of the detection value.
The invention has the beneficial effects that: the method can be used for evaluating the precision and accuracy of the detection result of the thickness of the reinforcement protection layer of the engineering structure entity, and solves the problem that the laboratory in the construction field is difficult to effectively evaluate the repeatability precision, the middle precision, the reproducibility precision and the accuracy of the detection result of the thickness of the reinforcement protection layer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a sample for evaluating the detection quality of the thickness of a reinforcing steel bar protection layer of an engineering structure entity according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a sample for evaluating the quality of detection of the thickness of a reinforcing bar protection layer of an engineering structure entity according to an embodiment of the present invention.
In the figure:
1. a main rib; 2. stirrups; 3. a substrate; 4. and (5) side sealing plates.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 1-2, a sample for evaluating the detection quality of the thickness of a reinforcement protection layer of an engineering structure entity according to an embodiment of the present invention includes a base material 3 made of a high polymer polyethylene material, wherein a plurality of main reinforcements 1 and a plurality of stirrups 2 are arranged inside the base material 3, and the main reinforcements 1 and the stirrups 2 are round steel bars.
In a specific embodiment of the present invention, the number of the main tendons 1 and the stirrups 2 is two.
In one embodiment of the present invention, carbon black pigment is added to the polymeric polyethylene material.
In one embodiment of the present invention, the substrate 3 is rectangular in shape, and a cross coordinate line is disposed on top of the substrate.
In one embodiment of the present invention, each of four sides of the base material 3 is provided with a mounting hole into which the main bar 1 or the stirrup 2 is inserted, and a side sealing plate 4 for sealing the mounting hole.
The invention also provides a use method of the sample for evaluating the detection quality of the thickness of the protective layer of the steel bar of the engineering structure entity, which comprises the following steps:
s1, mounting a main reinforcement in a lower part and a stirrup in an upper part in a base material, and measuring position data of the main reinforcement and the stirrup and the minimum linear distance from the main reinforcement to the top of the base material as characteristic values by a vernier caliper;
s2, detecting the distance from the steel bar inside the base material to the top of the base material by using a steel bar detector, taking the steel bar with larger distance from the top of the base material as a main steel bar, taking the steel bar with smaller distance from the top of the base material as a stirrup, obtaining position detection data of the main steel bar and the stirrup, detecting the distance from the main steel bar to the top of the base material, selecting the minimum value of the position detection data as the minimum linear distance detection data from the main steel bar to the top of the base material, and taking the position detection data and the minimum linear distance detection data as detection values;
s3, comparing the detection value with the characteristic value to obtain the accuracy of the detection value;
s4 repeating S2 and S3 to obtain repeatability precision, intermediate precision and reproducibility precision of the detection value.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
The shape of the sample is cuboid, the total size is 320mm (length) ×320mm (width) ×68mm (thickness), the color is black, and meanwhile, the top of the sample is marked with a test surface and a cross coordinate line for testing in a laser painting mode; the four sides of the sample are embedded and sealed with side sealing plates 4 with the thickness of 10mm, and the sample mainly comprises the following parts: the base material 3 and the reinforcing steel bar are formed, and the reinforcing steel bar comprises a main reinforcing steel bar 1 and a stirrup 2.
The base material 3 is made of a high molecular polyethylene material, and a carbon black pigment is added. Two solid round steel bars with the diameter of 20mm are arranged in the base material 3 to serve as main bars 1, and two solid round steel bars with the diameter of 18mm serve as stirrups 2. The distance between the longitudinal axes of the two main reinforcements 1 is 100mm, the distance between the longitudinal axes of the two stirrups 2 is 210mm, and the two longitudinal axes are distributed according with the actual engineering situation. The main reinforcement 1 and the stirrup 2 in the sample are placed by drilling holes on the base material by a precision machine tool and then mechanically inserted, and the characteristic value (thickness of the main reinforcement protective layer) of the sample is reliable because the reinforcing steel bars are built in the mode.
The thickness values of the protective layers of the two main ribs in the sample are all visible conditions of the solid beam member in the construction engineering and meet the requirement of the table E.0.4 in the standard GB 50204-2015 of the inspection and acceptance of the construction quality of the concrete structure engineering on the allowable deviation of the thickness of the protective layer of the longitudinal stressed reinforcing steel bar of the structural entity and the minimum design requirement of the table 8.2.1 in the specification GB 50010-2010 of the design of the concrete structure on the thickness of the protective layer of the beam member.
The samples according to the invention have the following advantages: 1) The application range is wide, and the coordination with detection equipment is strong. The geometric dimension of the sample testing surface is suitable for most of domestic reinforcement protection layer thickness detection equipment (such as a reinforcement detector); after the carbon black pigment is added to the sample substrate 3, electromagnetic interference cannot be generated on the reinforcement protection layer thickness detection equipment.
2) The sample has high reliability and is convenient to transport and carry. The sample substrate 3 is made of high-molecular polyethylene material, has higher hardness, wear-resistant surface and lighter weight compared with concrete, so that the sample reliability is improved, and the sample substrate is convenient to transport and carry.
3) The sample construction characteristics are certain representative, and the sample characteristic value meets the requirements of relevant standards. The two main reinforcements 1 and the two stirrups 2 are arranged in the sample, and the distribution of the main reinforcements 1 and the stirrups 2 accords with the actual engineering condition. And the characteristic values (thickness of the main reinforcement protection layer) of the samples are all visible conditions of the solid beam member in the construction engineering and meet the requirement of the table E.0.4 in the standard GB 50204-2015 of the acceptance Specification of the construction quality of the concrete structure engineering on the allowable deviation of the thickness of the longitudinal stress reinforcement protection layer of the structural entity and the minimum design requirement of the table 8.2.1 in the specification GB 50010-2010 of the design of the concrete structure on the thickness of the protection layer of the beam member.
4) The sample uses are various, and different requirements of quality control of the inspection and detection mechanism can be met. In general, quality control samples for testing are directed to the result data only. But the sample can also be used for evaluating whether the position of the built-in main reinforcement 1 and the stirrup 2 is correct or not by the inspector. The judgment is a precondition for ensuring the accuracy of the thickness detection result data of the reinforcing steel bar protection layer of the solid beam member. The general method flow of the thickness detection of the reinforcing steel bar protection layer of the solid beam member is to judge the positions of the main reinforcements and stirrups in the solid beam member by moving the reinforcing steel bar detector on the surface of the solid beam member, and test the minimum linear distance from the main reinforcements to the surface of the structural solid. The sample simulates the common concrete solid beam member in construction engineering from three aspects of internal reinforcement arrangement condition, main reinforcement protection layer thickness, no electromagnetic interference of base material, and the sample characteristic value (main reinforcement protection layer thickness) is reliable because the reinforcement is built in a precise machine tool processing mode, so that the reinforcement protection layer thickness detection equipment can test the sample characteristic value under the condition of repeatability, under the condition of some changes in a long time and under the condition of reproducibility, thereby evaluating the repeatability precision, the middle precision and the reproducibility precision of the reinforcement protection layer thickness detection result of the solid beam member. And, by using the internal steel bar arrangement condition diagram and the reference value of the thickness of the main reinforcement protective layer given in the sample, laboratory detection personnel in the construction field can also evaluate whether the position judgment of the built-in main reinforcement 1 and the stirrup 2 is correct, and the consistency degree (accuracy) between the detection result of the thickness of the beam member steel bar protective layer and the reference value is also evaluated.
In the beginning of 2017, the national institutional approval supervision and administration (CNCA) was entrusted with the use of the sample, and the 283-family inspection and detection institutions in the whole country were used to detect the thickness of the reinforcing bar protection layer of the solid beam member, and the accuracy of the detection results of the participating institutions was evaluated by the characteristic value of the sample. The project is successfully accepted by the expert conference of the CNCA organization on the 11 th and 10 th 2017, and the acceptance content comprises whether the samples are representative or not and whether the characteristic values of the samples prepared in batches are uniform and stable or not.
In summary, by means of the technical scheme provided by the invention, the method can be used for evaluating the precision and accuracy of the reinforcement protection layer thickness detection equipment such as a reinforcement detector, and the problem that the repeatability precision, the intermediate precision, the reproducibility precision and the accuracy of the reinforcement protection layer thickness detection result are difficult to evaluate effectively is solved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (1)
1. The utility model provides a sample for evaluating engineering structure entity reinforcing bar protective layer thickness detection quality, its characterized in that includes substrate (3) made by polymer polyethylene material, substrate (3) inside is provided with a plurality of main muscle (1) and a plurality of stirrup (2), main muscle (1) and stirrup (2) are round bar, substrate (3) shape is the cuboid, and its top is provided with the cross coordinate line, four sides of substrate (3) are provided with respectively and supply main muscle (1) or stirrup (2) male mounting hole and are used for shutoff side seal board (4) of mounting hole, the quantity of main muscle (1) and stirrup (2) is two; carbon black pigment is added in the high molecular polyethylene material, so that electromagnetic interference can not be generated on the reinforcement protection layer thickness detection equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810174563.0A CN108317987B (en) | 2018-03-02 | 2018-03-02 | Sample for evaluating thickness detection quality of reinforcement protection layer of engineering structure entity |
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| CN201810174563.0A CN108317987B (en) | 2018-03-02 | 2018-03-02 | Sample for evaluating thickness detection quality of reinforcement protection layer of engineering structure entity |
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| CN108317987A CN108317987A (en) | 2018-07-24 |
| CN108317987B true CN108317987B (en) | 2024-02-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487984A (en) * | 2019-08-30 | 2019-11-22 | 深圳大学 | A kind of chamber for NDT detection reinforcement parameter |
| CN114111515B (en) * | 2022-01-26 | 2022-05-20 | 建研院检测中心有限公司 | Protective layer thickness measuring method and system adopting steel bar protective layer thickness structure standard sample |
| CN116576806B (en) * | 2023-04-21 | 2024-01-26 | 深圳市磐锋精密技术有限公司 | Precision control system for thickness detection equipment based on visual analysis |
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| JP2010261772A (en) * | 2009-05-01 | 2010-11-18 | Shimizu Corp | Device and method for inspecting cover thickness of reinforcing bar |
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| CN207963831U (en) * | 2018-03-02 | 2018-10-12 | 中国建筑科学研究院有限公司 | The sample of quality is detected for assessing engineering structure body thickness of protection tier |
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2018
- 2018-03-02 CN CN201810174563.0A patent/CN108317987B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261772A (en) * | 2009-05-01 | 2010-11-18 | Shimizu Corp | Device and method for inspecting cover thickness of reinforcing bar |
| CN103547132A (en) * | 2012-07-17 | 2014-01-29 | 昆山雅森电子材料科技有限公司 | Electromagnetic interference shielding structure and flexible printed circuit board with same |
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