CN209991906U - Automatic measuring device for retraction amount by post-tensioning method - Google Patents
Automatic measuring device for retraction amount by post-tensioning method Download PDFInfo
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- CN209991906U CN209991906U CN201920913481.3U CN201920913481U CN209991906U CN 209991906 U CN209991906 U CN 209991906U CN 201920913481 U CN201920913481 U CN 201920913481U CN 209991906 U CN209991906 U CN 209991906U
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- measuring
- measuring rod
- hinge line
- measured
- steel hinge
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Abstract
The utility model discloses a back-tensioning returns volume of contracting automatic measuring device, it includes and measures measuring rod of measuring steel hinge line parallel arrangement, with measuring rod and the fixed locking device of the free end locking of measuring steel hinge line and digital display amesdial, digital display amesdial main part and measuring rod tip fixed connection, the measuring head top of digital display amesdial is pressed in roof beam body terminal surface, locking device comprises the axial sleeve pipe of two parallels and the horizontal sleeve pipe of connecting perpendicularly between the axial sleeve pipe, two axial sleeve pipes overlap respectively and locate the one end that the roof beam body was kept away from to measuring steel hinge line and measuring rod, measuring rod center pin and the distance that measures between the steel hinge line of measuring equals the distance between two axial sleeve pipe stretch-draw center pins, it is tensile outward to measure the steel hinge line to wear the jack, make the digital display amesdial measuring head take place deformation and produce the reading. The utility model discloses ensured that the volume of returning is measurationed the direction and is waited to measure steel strand orientation level, avoided the angle error to arouse that the data of measurationing is inaccurate, effectively ensured measurement accuracy and quality.
Description
Technical Field
The utility model relates to a bridge prestressing force post-tensioning returns volume of contracting and measures technical field.
Background
The operation mode of post-tensioning prestressed construction of the bridge mainly comprises two modes of manually controlled tensioning and intelligent system controlled tensioning. The elongation measurement comprises two methods of measuring the distance between a ruler arranged outside the jack and the beam end and measuring the plug-in elongation value of the jack. Compared with the conventional method for measuring the retraction amount by the prestress post-tensioning method, the method for directly measuring the fixed point position of the steel strand to be measured and the fixed point position of the beam end by the steel ruler is adopted. The measured data has large deviation, mainly because the manual measurement is difficult to ensure that the measuring length direction is horizontal to the steel strand to be measured, the measuring angle error is caused; meanwhile, the precision of the steel ruler is not high, so that the steel ruler can be accurately measured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to remedy prior art's not enough, provide the automatic measuring device of the volume of contracting of post-tensioning of improvement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an automatic measuring device for the retraction amount by a post-tensioning method, a steel strand to be measured penetrates through a center-penetrating jack from the end face of a beam body and extends outwards, the automatic measuring device for the retraction amount of the post-tensioning method comprises a measuring rod arranged in parallel with a steel hinge line to be measured, a locking device for locking and fixing the measuring rod and the free end of the steel hinge line to be measured, and a digital display dial indicator, wherein a main body of the digital display dial indicator is fixedly connected with the end part of the measuring rod, a measuring head of the digital display dial indicator is pressed against the end surface of a beam body, the locking device comprises two parallel axial sleeves and a transverse sleeve vertically connected between the axial sleeves, the two axial sleeves are respectively sleeved at one ends, far away from the beam body, of the steel hinge line to be measured and the measuring rod, the distance between the central shaft of the measuring rod and the steel hinge line to be measured is equal to the distance between the central shafts of the two axial sleeves, and a center penetrating jack stretches the steel hinge line to be measured.
In order to adapt to the situation that the jacks in different sites are different in size, the length of the measuring rod can be adjusted, namely the measuring rod is sleeved by more than two sections of pipes with different diameters and is fixed through a locking mechanism, and the small-diameter pipe extends or retracts relative to the large-diameter pipe to prolong or shorten the length of the measuring rod.
The axial sleeve of the locking device is fastened to the steel strand to be measured or the measuring rod through a bolt so as to ensure the fixation of the locking device with the steel strand to be measured and the measuring rod.
The utility model discloses utilize locking device to become synchronous axial extension's whole with the free end locking of the steel hinge line of awaiting measuring with measuring, set up the digital display amesdial between measuring stick and roof beam body, the length measurement that the steel hinge line of awaiting measuring extends outward is converted into the distance measurement that leaves the roof beam body to the measuring stick, can read out through the digital display amesdial, has ensured that the volume of returning is measured direction and the level of the steel hinge line direction of awaiting measuring, avoids angle error to cause the measured data inaccurate; meanwhile, a digital display measuring instrument is adopted, the precision can be accurate to 0.01mm, and the measuring precision and quality are effectively ensured.
Drawings
Fig. 1 is a schematic diagram of the automatic measuring device for the retraction amount by the post-tensioning method of the present invention in use.
Wherein
1-axial sleeve
2-measuring stick
3-locking device bolt
4-digital display dial indicator, 4.1-probe
5-beam body
6-jack
7-steel strand to be measured
Detailed Description
The utility model discloses a back-tension method returns volume of contracting automatic measuring device, it includes with the measuring stick 2 of measuring volume steel strand 7 parallel arrangement, with measuring stick 2 and the free end locking of measuring volume steel strand 7 fixed locking device, digital display amesdial 4 together. The main body of the digital display dial indicator 4 is fixedly connected with the end part of the measuring rod 2, and the measuring head of the digital display dial indicator 4 is pressed against the end surface of the beam body 5. The locking device is composed of two parallel axial sleeves 1 and a transverse sleeve vertically connected between the axial sleeves, the two axial sleeves 1 are respectively sleeved at one ends, far away from the beam body 5, of the steel hinge line 7 to be measured and the measuring rod 2, and the distance between the central axis of the measuring rod and the steel hinge line to be measured is equal to the distance between the central axes of the two axial sleeves, so that the measuring rod and the steel hinge line to be measured are parallel to each other. When the punching jack 6 stretches the steel hinge wire 7 to be measured and stretches outwards, the locking device synchronously pulls the measuring rod outwards, so that the reading generated by the deformation of the measuring head of the digital display dial indicator reflects the change quantity of the length of the steel hinge wire to be measured. The reading of the digital display dial indicator can be displayed in real time, and the real-time measurement is carried out in stages, so that the retraction amount data can be accurately obtained.
The measuring rod 2 is designed into a telescopic rod, more than two sections of pipes with different diameters are sleeved and fixed through bolts or other locking mechanisms, and the small-diameter pipe extends or retracts relative to the large-diameter pipe to prolong or shorten the length of the measuring rod. When the jacks used on site are different in length, the overall length of the measuring rod can be adjusted to be matched, and the measuring rod is locked and fixed through the bolts. The length measuring rod and the digital display dial indicator device can be replaced by elements such as laser ranging with higher precision, the size of the device is reduced, the installation and use difficulty is reduced, and the interference effects such as beam body reinforcing steel bars are avoided.
Claims (3)
1. The utility model provides a post-tensioning method volume of contracting automatic measuring device, treat that the steel strand to be measured runs through the jack that pierces through outwards to extend from the roof beam body terminal surface, its characterized in that: the automatic measuring device for the retraction amount of the post-tensioning method comprises a measuring rod arranged in parallel with a steel hinge line to be measured, a locking device for locking and fixing the measuring rod and the free end of the steel hinge line to be measured, and a digital display dial indicator, wherein a main body of the digital display dial indicator is fixedly connected with the end part of the measuring rod, a measuring head of the digital display dial indicator is pressed against the end surface of a beam body, the locking device comprises two parallel axial sleeves and a transverse sleeve vertically connected between the axial sleeves, the two axial sleeves are respectively sleeved at one ends, far away from the beam body, of the steel hinge line to be measured and the measuring rod, the distance between the central shaft of the measuring rod and the steel hinge line to be measured is equal to the distance between the central shafts of the two axial sleeves, and a center penetrating jack stretches the steel hinge line to be measured.
2. The automatic measuring device of the post-tensioning retraction amount according to claim 1, characterized in that: the measuring rod is sleeved by more than two sections of pipes with different diameters and is fixed through a locking mechanism, and the small-diameter pipe extends or retracts relative to the large-diameter pipe to prolong or shorten the length of the measuring rod.
3. The automatic measuring device of the post-tensioning retraction amount according to claim 1, characterized in that: the axial sleeve of the locking device is fastened to the steel strand to be measured or the measuring rod by a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913481.3U CN209991906U (en) | 2019-06-17 | 2019-06-17 | Automatic measuring device for retraction amount by post-tensioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920913481.3U CN209991906U (en) | 2019-06-17 | 2019-06-17 | Automatic measuring device for retraction amount by post-tensioning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209991906U true CN209991906U (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920913481.3U Active CN209991906U (en) | 2019-06-17 | 2019-06-17 | Automatic measuring device for retraction amount by post-tensioning method |
Country Status (1)
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| CN (1) | CN209991906U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945737A (en) * | 2021-05-13 | 2021-06-11 | 湖南联智智能科技有限公司 | Test device for measuring anchoring retraction value of steel strand |
-
2019
- 2019-06-17 CN CN201920913481.3U patent/CN209991906U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112945737A (en) * | 2021-05-13 | 2021-06-11 | 湖南联智智能科技有限公司 | Test device for measuring anchoring retraction value of steel strand |
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