CN102156011B - Anchored prestress testing piece - Google Patents
Anchored prestress testing piece Download PDFInfo
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- CN102156011B CN102156011B CN 201110088241 CN201110088241A CN102156011B CN 102156011 B CN102156011 B CN 102156011B CN 201110088241 CN201110088241 CN 201110088241 CN 201110088241 A CN201110088241 A CN 201110088241A CN 102156011 B CN102156011 B CN 102156011B
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- prestress
- test pieces
- anchor
- platinized platinum
- metal platinized
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 229910052751 metal Inorganic materials 0.000 claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 99
- 229910052697 platinum Inorganic materials 0.000 claims description 47
- 238000005259 measurement Methods 0.000 claims description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010998 test method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007716 flux method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses an anchored prestress testing piece that has a simple structure, a thin shape, light mass and low manufacturing cost and can be measured and operated conveniently. The anchored prestress testing piece comprises a testing piece mainbody, wherein the upper surface and the lower surface of the testing piece mainbody are insulating layers; and the testing piece mainbody is internally provided with one or more layers of metal platinium sheets that are arranged parallel to the upper surface and the lower surface of the testing piece mainbody. When in use, the anchored prestress testing piece is arranged between an anchor base plate and an anchor head so that capacitance is formed among the anchor base plate, the metal platinium sheet and the anchor head; before the prestress is applied, the capacitance value among the anchor base plate, the metal platinium sheet and the anchor head is measured; subsequently when the prestress is applied or after the prestress is applied, the testing piece mainbody is extruded and the thickness is reduced, the distance among the anchor base plate, the metal platinium sheet and the anchor head changes; subsequently the capacitance value among the anchor base plate, the metal platinium sheet and the anchor head is measured; according to the difference of the two capacitance values, the applied prestress value is calculated, and the whole detecting process is convenient, reliable, simple and feasible.
Description
Technical field
The present invention relates to building material field, be specifically related to a kind of prestressed test pieces after the anchoring of measuring.
Background technology
Along with the fast development of China's engineering construction project, prestress system more and more is applied in these project engineerings.The anchoring quality of prestress system directly affects its tension force, is important design and construction index.But because a variety of causes, in construction period, exist the indeterminate phenomenon of prestressed size behind the anchor.And during use, prestressed relaxing can occur, cause hidden dangers in project.Therefore, existing effective prestress is very important under the measurement anchor.
Mainly be divided into for the anchor lower prestress measuring method at present: lifting jack liquid (oil) is pressed method of testing, anchor lower sensor method of testing, static strain method of testing, string shake method of testing, magnetic flux method of testing and Fiber Optical Sensor Based etc.Packaged technical equipment in these method of testings is rare at home, and volume is big, quality heavy, and surveying instrument costliness, cost are very high, still can't apply on the engineering.
Summary of the invention
Problem to be solved by this invention is, at the deficiency of above-mentioned technology, design a kind of simple in structure, bodily form thin little, quality is slight, cheap for manufacturing cost, measure prestress test pieces behind the easy to operate anchor.
The technical scheme that the present invention adopts for its problem of solution is:
Prestress test pieces behind a kind of anchor, comprise that upper and lower surface is the test pieces main body of insulation course, be provided with the one or more layers metal platinized platinum that parallels with upper and lower surface in the test pieces main body, be provided with dielectric film between the adjacent two layers metal platinized platinum, every layer of metal platinized platinum outwards leads to the measurement joint that can be connected with external measurement devices, and described test pieces main body is provided with the through hole that presstressed reinforcing steel is passed.
In the present invention, described test pieces main body is provided with a through hole, and the periphery of through hole is surrounded with the metal platinized platinum.
In the present invention, described test pieces main body is provided with a plurality of through holes, and the neighboring of the group of holes of being made up of a plurality of through holes is surrounded with the metal platinized platinum.
In the present invention, described test pieces main body is provided with a plurality of through holes, the periphery of each through hole is surrounded with the metal platinized platinum, is looped around between the metal platinized platinum of each bore periphery separate and all outwards lead to the measurement joint that can be connected with external measurement devices.
In the present invention, described metal platinized platinum is made up of some little metal platinized platinums, is provided with the film that is electrically insulated between the adjacent little metal platinized platinum, all outwards leads to the measurement joint that can be connected with external measurement devices on the every little metal platinized platinum.
The invention has the beneficial effects as follows: the present invention includes upper and lower surface is the test pieces main body of insulation course, be provided with the one or more layers metal platinized platinum that parallels with upper and lower surface in the test pieces main body, during use, the present invention is installed between anchor plate and the anchor head, forms electric capacity between anchor plate, metal platinized platinum and anchor head like this.Before applying prestress, measure the capacitance between anchor plate, metal platinized platinum and the anchor head, then in applying the prestress process or after applying prestress, the test pieces main body is extruded attenuation, variation has taken place in the distance between anchor plate, metal platinized platinum and the anchor head, measures the capacitance between anchor plate, metal platinized platinum and the anchor head again, according to the difference of front and back capacitance, extrapolate the prestress value that applies, whole testing process is convenient and reliable, simple.And can detect effective prestress under the anchor at any time, for the potential safety hazard of predicting the pre-stress concrete structure provides shortcut, be economic in such monitoring structural health conditions, reliable method.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of present embodiment;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is A-A ' direction cut-open view of Fig. 1;
Fig. 4 is B-B ' direction cut-open view of Fig. 2;
Fig. 5 is the structural representation that present embodiment is connected with external component.
Embodiment
Referring to figs. 1 through Fig. 5, provided by the present invention a kind of simple in structure, volume is little, quality is light, prestress test pieces behind the anchor of low cost of manufacture, comprise that upper and lower surface is the test pieces main body 1 of insulation course 2, be provided with the one or more layers metal platinized platinum 3 that parallels with upper and lower surface in the test pieces main body 1, the number of plies of metal platinized platinum 3 is more many, it is just more many that it measures the parameter of coming, and its measurement result is just more accurate.In the present embodiment, be provided with the two-layer metal platinized platinum 3 that parallels with upper and lower surface in the test pieces main body 1.Be provided with dielectric film 4 between the adjacent metal platinized platinum 3, every layer of metal platinized platinum 3 outwards leads to the measurement joint 31 that can be connected with external measurement devices, and described test pieces main body 1 is provided with the through hole 11 that presstressed reinforcing steel is passed.
As preferred embodiment, described test pieces main body 1 is provided with a plurality of through holes 11 that presstressed reinforcing steel is passed, and makes every presstressed reinforcing steel that the through hole corresponding with it 11 all be arranged, the convenient installation and arrangement.The periphery of each through hole 11 is surrounded with metal platinized platinum 3, is looped around between the metal platinized platinum 3 of each through hole 11 periphery separate and all outwards lead to the measurement joint 31 that can be connected with external measurement devices.The capacitance of each through hole 11 periphery can be measured exactly by measuring joint 31, the stressing conditions of the presstressed reinforcing steel in each through hole 11 can be extrapolated.Further, also can directly measure the whole stressing conditions of prestressing tendon like this with metal platinized platinum 3 around the neighboring that is arranged on the group of holes of being formed by a plurality of through holes 11.Certainly here, also above-mentioned two kinds of schemes can be used in combination, the parameter of measuring like this will be more accurate.
Further, described metal platinized platinum 3 is made up of some little metal platinized platinums 32, be provided with the film that is electrically insulated between the adjacent little metal platinized platinum 32, avoid between the adjacent little metal platinized platinum 32 electric connection being arranged, all outwards lead to the measurement joint 31 that can be connected with external measurement devices on the every little metal platinized platinum 32.Herein, also can remove and measure joint 31, little metal platinized platinum 11 parts are exposed in the outside of test pieces main body 1, perhaps offer aperture in test pieces main body 1, the measuring pen of measuring equipment can be directly and little metal platinized platinum 11 electrical communication by aperture like this.
Be further elaborated below in conjunction with use of the present invention: the present invention is installed between anchor plate 5 and the anchor head 6, and anchor plate 5, metal platinized platinum 3 and 6 of anchor heads form electric capacity like this.Before applying prestress, measure the capacitance between anchor plate 5, metal platinized platinum 3 and the anchor head 6, then in applying the prestress process or after applying prestress, the test pieces main body is extruded attenuation, variation has taken place in the distance between anchor plate 5, metal platinized platinum 3 and the anchor head 6, measures the capacitance between anchor plate 5, metal platinized platinum 3 and the anchor head 6 again, according to the difference of front and back capacitance, extrapolate the prestress value that applies, whole testing process is convenient and reliable, simple.And can detect effective prestress under the anchor at any time, for the potential safety hazard of predicting the pre-stress concrete structure provides shortcut, be economic in such monitoring structural health conditions, reliable method
Because the present invention is simple in structure, volume is little, quality is light, convenient for production, can be easily and the supporting use of other products, so other products and simple superposition of the present invention, one side as anchor plate 5 or anchor head 6 is provided with insulation course so that with the present invention identical technique effect is arranged, and all belongs to the scope of technical solution of the present invention.
The above only is the preferred embodiment of the invention, is not the present invention is done restriction completely, and every foundation technical spirit of the present invention all belongs to the scope of technical solution of the present invention to any simple modification, equivalent variations or decoration that above embodiment does.
Claims (5)
1. one kind is used the prestress test pieces to measure prestressed method behind the anchor, it is characterized in that may further comprise the steps:
A, preparation prestress test pieces, this prestress test pieces comprises that upper and lower surface is the test pieces main body (1) of insulation course (2), be provided with the metal platinized platinum (3) that one deck parallels with upper and lower surface in the test pieces main body (1) or be provided with the two-layer above metal platinized platinum (3) that parallels and exist each other dielectric film (4) with upper and lower surface, every layer of metal platinized platinum (3) outwards leads to the measurement joint (31) that can be connected with external measurement devices, and described test pieces main body (1) is provided with the through hole (11) that presstressed reinforcing steel is passed;
B, the prestress test pieces is installed between anchor plate and the anchor head, forms electric capacity between anchor plate, metal platinized platinum and anchor head;
C, before applying prestress, measure the capacitance between anchor plate, metal platinized platinum and the anchor head;
D, in applying the prestress process or after applying prestress, the test pieces main body is extruded attenuation, variation has taken place in the distance between anchor plate, metal platinized platinum and the anchor head, measures the capacitance between anchor plate, metal platinized platinum and the anchor head again;
F, according to the difference of front and back capacitance, extrapolate the prestress value that applies.
2. a kind of use prestress test pieces according to claim 1 is measured prestressed method behind the anchor, and it is characterized in that: described test pieces main body (1) is provided with a through hole (11), and the periphery of through hole (11) is surrounded with metal platinized platinum (3).
3. a kind of use prestress test pieces according to claim 1 is measured prestressed method behind the anchor, it is characterized in that: described test pieces main body (1) is provided with a plurality of through holes (11), and the neighboring of the group of holes of being made up of a plurality of through holes (11) is surrounded with metal platinized platinum (3).
4. a kind of use prestress test pieces according to claim 1 is measured prestressed method behind the anchor, it is characterized in that: described test pieces main body (1) is provided with a plurality of through holes (11), the periphery of each through hole (11) is surrounded with metal platinized platinum (3), is looped around between the metal platinized platinum (3) of each through hole (11) periphery separate and all outwards lead to the measurement joint (31) that can be connected with external measurement devices.
5. according to prestressed method behind arbitrary described a kind of use prestress test pieces measurement anchor in the claim 1 to 4, it is characterized in that: described metal platinized platinum (3) is made up of some little metal platinized platinums (32), be provided with the film that is electrically insulated between the adjacent little metal platinized platinum (32), all outwards lead to the measurement joint (31) that can be connected with external measurement devices on the every little metal platinized platinum (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110088241 CN102156011B (en) | 2011-04-09 | 2011-04-09 | Anchored prestress testing piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110088241 CN102156011B (en) | 2011-04-09 | 2011-04-09 | Anchored prestress testing piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102156011A CN102156011A (en) | 2011-08-17 |
| CN102156011B true CN102156011B (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110088241 Active CN102156011B (en) | 2011-04-09 | 2011-04-09 | Anchored prestress testing piece |
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| Country | Link |
|---|---|
| CN (1) | CN102156011B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2616542A1 (en) * | 1987-06-12 | 1988-12-16 | Renault | COLLECTIVE MANUFACTURING METHOD OF CAPACITIVE PRESSURE SENSORS |
| CN2311765Y (en) * | 1997-11-10 | 1999-03-24 | 陈爱莉 | MC rockbolt dynamic force measuring system |
| CN202066627U (en) * | 2011-04-09 | 2011-12-07 | 刘喜元 | Testing piece of prestressing force after anchoring |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935121A (en) * | 1982-08-23 | 1984-02-25 | Horikawa Yasuo | Pressure detector |
| DK0674164T3 (en) * | 1994-03-18 | 1998-02-23 | Envec Mess Und Regeltechn Gmbh | Capacitive pressure sensor or differential pressure sensor |
| CN1123764C (en) * | 2000-07-15 | 2003-10-08 | 山东省硅酸盐研究设计院 | Ceramic pressure sensor and differential pressure sensor |
-
2011
- 2011-04-09 CN CN 201110088241 patent/CN102156011B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2616542A1 (en) * | 1987-06-12 | 1988-12-16 | Renault | COLLECTIVE MANUFACTURING METHOD OF CAPACITIVE PRESSURE SENSORS |
| CN2311765Y (en) * | 1997-11-10 | 1999-03-24 | 陈爱莉 | MC rockbolt dynamic force measuring system |
| CN202066627U (en) * | 2011-04-09 | 2011-12-07 | 刘喜元 | Testing piece of prestressing force after anchoring |
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| Publication number | Publication date |
|---|---|
| CN102156011A (en) | 2011-08-17 |
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Effective date of registration: 20160613 Address after: 528100 Leping village, Sanshui Town, Foshan City, Guangdong Province, Sanjiang village committee, village of Yin Zi (north of Foshan ring, south side of Guangzhou Zhuhai railway) Patentee after: FOSHAN HIGHWAY&BRIDGE CONSTRUCTION PREFABRICATION CO., LTD. Address before: 528000 No. 18, No. 13-801, Jiangwan Road, Chancheng District, Guangdong, Foshan Patentee before: Liu Xiyuan |