CN202501817U - Device for measuring the tensioning extension amount of pre-stressed steel strand - Google Patents
Device for measuring the tensioning extension amount of pre-stressed steel strand Download PDFInfo
- Publication number
- CN202501817U CN202501817U CN201220162575XU CN201220162575U CN202501817U CN 202501817 U CN202501817 U CN 202501817U CN 201220162575X U CN201220162575X U CN 201220162575XU CN 201220162575 U CN201220162575 U CN 201220162575U CN 202501817 U CN202501817 U CN 202501817U
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- steel strand
- connection strap
- strand wires
- scale
- measuring
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Abstract
The utility model discloses a device for measuring the tensioning extension amount of a pre-stressed steel strand, comprising a jack and a steel strand connected on the jack. The device for measuring the tensioning extension amount of the pre-stressed steel strand is characterized by also comprising a connecting strip and a scale. One end of the connecting strip is connected on the steel strand vertically and fixedly, and the other end is equipped with a sliding hole along the direction of the steel strand; one end of the scale can be in clamp connection in the sliding hole of the connecting strip slidably, and the other end is a zero graduation end and is abutted against the end face of the jack. The device for measuring the tensioning extension amount of the pre-stressed steel strand of the utility model has the advantages of simple structure, convenient operation, accurate measurement, etc.
Description
Technical field
The utility model relates to the measurement mechanism of the steel strand wires elongation in a kind of crowd's anchor system of science of bridge building.
Background technology
When science of bridge building was constructed, the application that the employing PSC is built more and more widely.When adopting PSC to build, need to adopt crowd's anchor system, in crowd's anchor system, generally lean against anchoring place and lifting jack is set carries out group anchor stretch-draw prestressed stretch-draw.In the stretching process, the control of steel strand wires elongation plays an important role to prestressed applying, the measurement of elongation and calculating accurately, also directly have influence on prestress and apply the estimation with the stress performance of structure.
At present; Method for measurement for the steel strand wires elongation in crowd's anchor system; Mainly contain two kinds: a kind of is the elongation method for measurement (being called for short " stroke method ") of jack piston, and a kind of in addition method is the method (being called for short " direct method ") that directly measures the elongation of steel strand wires.When using " stroke method " method for measurement, the elongation accuracy of measurement of jack piston is not high.When using " direct method " method for measurement, promptly on the steel strand wires in the moveable anchor outside, make marks, as the benchmark that measures.But two shortcomings are arranged also: the one, measure inconvenient.The 2nd, steel strand wires are when stressed, and there is the phenomenon of dispersing the termination, and measure influential to the elongation of steel strand wires.
Simultaneously, existing " direct method " measurement mode during each stretch-draw, all need be handed survey instrument and go to measure and reading, and operation is inconvenience very.
The utility model content
To the deficiency of above-mentioned prior art, the technical matters that the utility model will solve is: how to provide a kind of simple in structure, easy to operate, measure prestress wire stretching extension measuring device accurately.
In order to solve the problems of the technologies described above, adopted following technical scheme in the utility model:
A kind of prestress wire stretching extension measuring device; Comprise lifting jack and the steel strand wires that are connected above that, it is characterized in that, also comprise connection strap and scale; Said connection strap one end vertical fixing is connected on the steel strand wires; The connection strap other end is provided with slide opening along the steel strand wires direction, and said scale one end is connected in the slide opening of connection strap slidably, and the scale other end is zero mark end and is against the lifting jack end face.
When the utility model uses, before steel strand tension, read the reading that scale is positioned at connection strap slide opening place earlier.After stretch-draw; Only needing to move scale makes the scale end once more with after the lifting jack end face contacts; Read the reading that scale is positioned at connection strap slide opening place again; Two readings subtract each other can calculate steel strand wires elongation strain amount, need not the repeated moving survey instrument when repeatedly tension is measured, and measures very convenient quick.No matter through several strokes, all measure the length of classification steel strand wires with this, the result of accumulative total is exactly the actual measurement stretch value between initial stress and the whole stress.
As optimization, said connection strap is the cuboid of alumina based material, has circular hole on the connection strap, and said steel strand wires are placed in the circular hole, and corresponding circular hole also is connected with and is used for steel strand wires are tightened fixing bolt on the connection strap.After the optimization; Adopt the cuboid of alumina based material; Be convenient to read exactly the size that scale is positioned at the slide opening place; Connection strap and steel strand wires adopt bolt, can make it as far as possible away from the place that serves as a mark in the location behind the position of steel strand wires termination so that move connection strap, avoid the influence of steel strand wires end distortion to measurement effectively.
In sum, the utility model possesses simple in structure, and is easy to operate, measures advantage accurately.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation of independent connection strap among Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to specify.
During practical implementation, as depicted in figs. 1 and 2, a kind of prestress wire stretching extension measuring device; Comprise lifting jack 1 and the steel strand wires 2 that are connected above that; Also comprise connection strap 3 and scale 4, said connection strap 3 one end vertical fixing are connected on the steel strand wires 2, and connection strap 3 other ends are provided with slide opening 5 along steel strand wires 2 directions; Said scale 4 one ends are connected in the slide opening 5 of connection strap 3 slidably, and scale 4 other ends are zero mark end and are against lifting jack 1 end face.During practical implementation, said connection strap 3 is the cuboid of alumina based material, has circular hole 6 on the connection strap 3, and said steel strand wires 2 are placed in the circular hole, and corresponding circular hole 6 also is connected with and is used for steel strand wires are tightened fixing bolt 7 on the connection strap 3.
This tool work principle is: during 1 stretch-draw, entangle steel strand wires with the circular hole of connection strap, and tight a bolt, as mark.2 scales pass the connection strap slide opening, and zero mark end leans on the lifting jack sense data to be the steel strand wires elongation simultaneously, no matter through several strokes, all measure the length of classification steel strand wires with this, and the result of accumulative total is exactly the actual measurement stretch value between initial stress and the whole stress.3 scales should be contained in the position away from the steel strand wires termination as far as possible.
It is easy, easy to operate that this device measures, and solves the dispersing phenomenon of steel strand wires termination simultaneously and to cause the steel strand wires elongation to measure inaccurate.Through this device, the elongation of measurement conforms to theoretical value.
Claims (2)
1. prestress wire stretching extension measuring device; Comprise lifting jack and the steel strand wires that are connected above that, it is characterized in that, also comprise connection strap and scale; Said connection strap one end vertical fixing is connected on the steel strand wires; The connection strap other end is provided with slide opening along the steel strand wires direction, and said scale one end is connected in the slide opening of connection strap slidably, and the scale other end is zero mark end and is against the lifting jack end face.
2. prestress wire stretching extension measuring device as claimed in claim 1; It is characterized in that; Said connection strap is the cuboid of alumina based material; Have circular hole on the connection strap, said steel strand wires are placed in the circular hole, and corresponding circular hole also is connected with and is used for steel strand wires are tightened fixing bolt on the connection strap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220162575XU CN202501817U (en) | 2012-04-17 | 2012-04-17 | Device for measuring the tensioning extension amount of pre-stressed steel strand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220162575XU CN202501817U (en) | 2012-04-17 | 2012-04-17 | Device for measuring the tensioning extension amount of pre-stressed steel strand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202501817U true CN202501817U (en) | 2012-10-24 |
Family
ID=47038430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220162575XU Expired - Lifetime CN202501817U (en) | 2012-04-17 | 2012-04-17 | Device for measuring the tensioning extension amount of pre-stressed steel strand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202501817U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286925A (en) * | 2018-01-17 | 2018-07-17 | 郝铭 | A kind of road and bridge construction measuring device |
| CN109764845A (en) * | 2019-03-12 | 2019-05-17 | 四川升拓检测技术股份有限公司 | One kind being based on reverse drawing method front end steel strand wires displacement detector |
| CN114061402A (en) * | 2021-11-23 | 2022-02-18 | 中国二十二冶集团有限公司 | Method for measuring elongation of prestressed tendon |
-
2012
- 2012-04-17 CN CN201220162575XU patent/CN202501817U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286925A (en) * | 2018-01-17 | 2018-07-17 | 郝铭 | A kind of road and bridge construction measuring device |
| CN109764845A (en) * | 2019-03-12 | 2019-05-17 | 四川升拓检测技术股份有限公司 | One kind being based on reverse drawing method front end steel strand wires displacement detector |
| CN114061402A (en) * | 2021-11-23 | 2022-02-18 | 中国二十二冶集团有限公司 | Method for measuring elongation of prestressed tendon |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |
|
| CX01 | Expiry of patent term |