CN113432578A - Sustainable steel bar surface strain gauge fixing device and using method thereof - Google Patents
Sustainable steel bar surface strain gauge fixing device and using method thereof Download PDFInfo
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- CN113432578A CN113432578A CN202110832970.8A CN202110832970A CN113432578A CN 113432578 A CN113432578 A CN 113432578A CN 202110832970 A CN202110832970 A CN 202110832970A CN 113432578 A CN113432578 A CN 113432578A
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- strain gauge
- surface strain
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- 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
- G01B21/32—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 the deformation in a solid
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A sustainable steel bar surface strain gauge fixing device comprises a surface strain gauge, a variable inner diameter clamp and a fixing mechanism; the surface strain gauge is arranged in the variable inner diameter clamp, the bottom of the variable inner diameter clamp is connected to a fixing mechanism, and the fixing mechanism is arranged on the steel bar; the invention relates to a sustainable steel bar surface strain gauge fixing device and a using method thereof, which improve the defects at present, and not only slightly improve the existing surface strain gauge, but also design the traditional clamp as a clamp with variable inner diameter and a mounting base, thus not only improving the simplicity and convenience of the strain gauge in the mounting process, but also enhancing the adaptability of the existing surface strain gauge, and meanwhile, the existing surface strain gauge is provided with a data processing server and a data collector thereof, thus not only monitoring the measured stress strain, but also directly converting the measured data into the data required by detection personnel.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a fixing device for a sustainable steel bar surface strain gauge and a using method of the fixing device.
Background
The surface strain gauge is a monitoring element which is suitable for being arranged on the surface of a hydraulic structure or other structures for a long time, measuring the strain quantity of the surface of the structure and synchronously measuring the temperature of a distribution point. The vibrating wire type surface strain gauge has the advantages of small elastic modulus, good follow-up property with a measured structure, no interference to an original stress field in measurement, recyclability and the like, and is widely applied to the field of civil engineering tunnels. However, when the device is applied to different projects, the working environment of the device can be greatly different, and the shape of the layout position can be greatly changed. Most of the traditional surface strain gauges consist of a strain gauge, a mounting clamp and a signal transmission cable, the follow-up property is often limited by the shape of a measured structure, and particularly for some special structural members, the traditional surface strain gauges often cannot be stably fixed due to the limitations of the traditional device and the uncontrollable property of an operator, so that huge property loss is caused. The surface strain gauge fixing device for monitoring the strain change of the steel bar is few at present.
Disclosure of Invention
The invention aims to provide a sustainable steel bar surface strain gauge fixing device and a using method thereof, so as to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a sustainable steel bar surface strain gauge fixing device comprises a surface strain gauge, a variable inner diameter clamp and a fixing mechanism; the surface strain gauge is arranged in the variable inner diameter clamp, the bottom of the variable inner diameter clamp is connected to a fixing mechanism, and the fixing mechanism is arranged on the steel bar;
the fixing mechanism comprises an installation base, a welding end and a telescopic spring; the bottom of a plurality of installation bases all is provided with the welding end, connects through expanding spring between the installation base, and the welding end welds on the reinforcing bar.
Furthermore, the number of the installation bases is four, and the contact surfaces of the installation bases and the reinforcing steel bars are arc-shaped.
Furthermore, between four installation bases, adjacent position all is through expanding spring connection.
Further, the variable inner diameter clamp comprises a shell, a fixing bolt and a clamping block; the fixing bolt penetrates through the shell, the two clamping blocks are connected to the fixing bolt inside the shell in a threaded fit mode, and the surface strain gauge is fixed through the two clamping blocks.
Furthermore, the inner side surface of the shell is provided with an insulation board.
Further, the top of the shell is fixedly provided with a cover plate through a buckle.
Furthermore, a through hole is formed in the cover plate, a cable is arranged in the through hole, one end of the cable is connected with the surface strain gauge, and the other end of the cable is externally connected with the processor.
Furthermore, a heat energy converter is arranged in the inner diameter-variable clamp and connected with a cable.
Further, a method for using the sustainable steel bar surface strain gauge fixing device comprises the following steps:
determining a layout point position of the surface strain gauge, fixing the variable inner diameter fixture on the layout point position, and welding the variable inner diameter fixture with a steel bar of the layout point position through a welding end;
adjusting a clamping block in the variable inner diameter clamp, fixing the surface strain gauge and connecting a cable;
and fifthly, dredging the conducting wire, connecting the conducting wire with a server, and reading the recorded data.
Compared with the prior art, the invention has the following technical effects:
the invention relates to a sustainable steel bar surface strain gauge fixing device and a using method thereof, which improve the defects at present, and not only slightly improve the existing surface strain gauge, but also design the traditional clamp as a clamp with variable inner diameter and a mounting base, thus not only improving the strain gauge simply and conveniently in the mounting process, but also enhancing the adaptability of the existing surface strain gauge, and meanwhile, the existing surface strain gauge is provided with a data processing server and a data collector thereof, so that the measured stress strain can be monitored, and the measured data can be directly converted into the data required by detection personnel; in addition, the simple and convenient base installation is an improvement of the traditional method, the power supply of the geothermal energy early warning system conforms to the idea of sustainable development, and the economic benefit is good.
The problem of surface strain gauge lay inefficacy that leads to because fixed inconvenient in the installation is solved.
The problem of the measurement error of stress strain that the surface strain gauge causes because misoperation when pre-buried in advance and make the deformation early warning of tunnel newly-excavated country rock inaccurate is solved.
Drawings
FIG. 1 is a schematic structural diagram of a fixing device for a steel bar surface strain gauge and a use method thereof;
fig. 2 is a sectional detail view of the structure of the fixing device.
The device comprises a surface strain gauge 1, a variable inner diameter clamp 2, a signal transmission cable 3, an installation base 4, a fixing bolt 5, a through hole 6, a welding end 7, a telescopic spring 8, a buckle 9, a cover plate 10, a steel bar 11, an insulation board 12, a heat energy converter 13 and a clamping block 15.
Detailed Description
The invention discloses a fixing device for a sustainable steel bar surface strain gauge and a using method of the fixing device, and the fixing device comprises a surface strain gauge 1, a variable inner diameter clamp 2, a signal transmission cable 3, an installation base 4, a fixing bolt 5, a through hole 6, a welding end 7, an expansion spring 8, a buckle 9, a cover plate 10, a steel bar 11, an insulation board 12 and a heat energy converter 13.
The surface strain gauge 1 consists of a variable inner diameter clamp 2 and a signal transmission cable 3, is connected with the mounting base through the variable inner diameter clamp, and transmits the temperature and the strain thereof to the outside through the signal transmission cable.
The mounting base is arranged to be a movable mounting base and is formed by combining an upper portion and a lower portion, the lower portion is used for being fixed with a structure to be tested (generally a steel bar), the middle portion is connected through a telescopic spring, deformation is guaranteed to be consistent with the steel bar, a detailed fixed diagram is shown in figure 2, and the upper portion is used for fixing the surface strain gauge.
The through holes are used for dredging the transmission cable.
The welding end is made of hard steel, the mounting base at one end is connected through bolts, and the mounting base at one end is connected with the component to be measured in a welding mode.
The telescopic spring is made of light steel, has good elasticity and strength, is used in three structures of the base, is used for adapting to the inner diameter of a measured structure in the detailed structure figure 2, is used for synchronizing the strain of reinforcing steel bars, and is used for adapting to the size of the surface strain gauge, so that the simplicity of mounting and fixing the surface strain gauge is ensured.
The buckle is used for fixing the cover plate, and the cover plate is guaranteed not to deviate under the action of external force.
The cover plate is used for protecting the surface strain gauge and ensuring that the surface strain gauge is not influenced and is inactivated in the construction process (such as gunite and the like).
The heat insulation plate is used for keeping the temperature in the base constant.
The heat energy converter is used for converting geothermal energy into electric energy and providing the electric energy for the data processing server to acquire conversion data.
The data processing server adopts a geothermal energy conversion device, converts the geothermal energy into electric energy required by the data processing server in a thermal energy mode, is connected with the liquid crystal screen, converts the measured temperature and strain into an accumulated deformation amount through processing, displays the accumulated deformation amount and the temperature on the liquid crystal screen, and can adjust the liquid crystal screen to display the accumulated deformation and the stress increment of days, months and years.
The specific operation method and process are as follows:
the specific implementation process of the invention is roughly divided into the following five steps:
firstly, determining the layout point position of a surface strain gauge;
secondly, determining a data processing service placement position;
thirdly, calculating the length of the data transmission cable;
fourthly, mounting a surface strain gauge;
and fifthly, dredging the lead, connecting the server and reading the recorded data.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is described in detail below with reference to the accompanying drawings, and the exemplary embodiments and descriptions of the present invention are only used for explaining the present invention and are not used as limitations of the present invention.
Examples
A sustainable steel surface strain gauge fixing device and a using method thereof comprise a surface strain gauge, and the sustainable steel surface strain gauge fixing device mainly comprises a three-part framework, wherein except for a surface strain 1, the three parts are connected in a bolt connection or welding mode, so that the device is more convenient and flexible. Considering that the surface strain gauge 1 is any commercially available element with different specifications and without fixed volume and diameter, the fixing device structure is divided into two parts, wherein one part is used for connecting with a structure to be measured, the other part is used for arranging the surface strain gauge, the detailed structural components refer to figures 1 and 2,
before installation and layout, firstly, the layout point position and the layout point position of a data processing server need to be determined, the length of a data transmission cable is calculated according to the distance between the layout point position and the layout point position, then, a lower structure of a mounting base is taken out, the mounting base and a steel bar are fixed according to a mode shown in figure 2, then, a surface strain gauge with required specifications is connected and fixed with an upper half structure of the mounting base through a variable inner diameter clamp, the upper half structure and a lower half structure of the base are connected through bolts, the mounting of the base is basically completed, a cover plate is covered, the data transmission cable is taken out from a through hole and connected with a pre-laid data processing service device, and data is read.
Claims (9)
1. A sustainable steel bar surface strain gauge fixing device is characterized by comprising a surface strain gauge (1), a variable inner diameter clamp (2) and a fixing mechanism; the surface strain gauge (1) is arranged in the variable inner diameter clamp (2), the bottom of the variable inner diameter clamp (2) is connected to a fixing mechanism, and the fixing mechanism is arranged on the steel bar;
the fixing mechanism comprises a mounting base (4), a welding end (7) and a telescopic spring (8); the bottom of a plurality of installation bases (4) is provided with welding end heads (7), the installation bases (4) are connected through telescopic springs, and the welding end heads (7) are welded on the reinforcing steel bars.
2. The sustainable steel surface strain gauge fixing device of claim 1, wherein the number of the mounting bases (4) is four, and the contact surfaces of the mounting bases (4) and the steel bars are arc-shaped.
3. The sustainable steel surface strain gauge fixing device of claim 2, wherein adjacent positions between the four mounting bases (4) are connected through the expansion spring (8).
4. The sustainable steel surface strain gauge fixing device of claim 1, wherein the variable inner diameter clamp (2) comprises a housing, a fixing bolt (5) and a clamping block (15); the fixing bolt (5) penetrates through the shell, two clamping blocks (15) are connected to the fixing bolt (5) inside the shell in a threaded fit mode, and the surface strain gauge (1) is fixed through the two clamping blocks (15).
5. The sustainable steel surface strain gauge fixing device of claim 4, wherein the inner side of the shell is provided with an insulation board (12).
6. The sustainable steel surface strain gauge fixing device of claim 4, wherein the top of the shell is fixedly provided with a cover plate (10) through a buckle (9).
7. The sustainable steel surface strain gauge fixing device according to claim 6, wherein a through hole (6) is formed in the cover plate (10), a cable (3) is arranged in the through hole (6), one end of the cable (3) is connected with the surface strain gauge (1), and the other end of the cable is externally connected with a processor.
8. The sustainable steel surface strain gauge fixing device of claim 7, wherein a thermal energy converter (13) is further arranged in the variable inner diameter clamp (2), and the thermal energy converter (13) is connected with the cable (3).
9. A method for using a sustainable steel surface strain gauge fixing device, which is based on any one of claims 1 to 8, and comprises the following steps:
determining the layout point position of the surface strain gauge, fixing the variable inner diameter fixture (2) on the layout point position, and welding the variable inner diameter fixture with a steel bar of the layout point position through a welding end;
adjusting a clamping block in the variable inner diameter clamp (2), fixing the surface strain gauge (1) and connecting a cable;
and dredging the lead, connecting a server, and reading recorded data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110832970.8A CN113432578A (en) | 2021-07-22 | 2021-07-22 | Sustainable steel bar surface strain gauge fixing device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110832970.8A CN113432578A (en) | 2021-07-22 | 2021-07-22 | Sustainable steel bar surface strain gauge fixing device and using method thereof |
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| CN113432578A true CN113432578A (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110832970.8A Pending CN113432578A (en) | 2021-07-22 | 2021-07-22 | Sustainable steel bar surface strain gauge fixing device and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115565343A (en) * | 2022-09-27 | 2023-01-03 | 中交四公局第三工程有限公司 | Early warning monitoring method for karst tunnel structure safety |
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| JP2015227862A (en) * | 2014-06-02 | 2015-12-17 | 株式会社デンロコーポレーション | Additional stress estimation method of steel structure constituted of angle steel member |
| CN209055099U (en) * | 2018-09-11 | 2019-07-02 | 中交第三航务工程局有限公司 | A kind of high reliability bottom platform monitor for stress |
| CN209446021U (en) * | 2018-12-22 | 2019-09-27 | 中国计量科学研究院 | A kind of strain gauge caliberating device |
| CN210775881U (en) * | 2019-09-20 | 2020-06-16 | 武汉弘泰建筑工程质量检测有限公司 | Steel bar scanner |
| CN210917499U (en) * | 2019-09-20 | 2020-07-03 | 中电建路桥集团有限公司 | Fixing device for steel bar strain gauge |
| CN111855027A (en) * | 2020-07-30 | 2020-10-30 | 河北建设勘察研究院有限公司 | Stress monitoring method for bridge deck and newly-built bearing platform in bridge structure |
-
2021
- 2021-07-22 CN CN202110832970.8A patent/CN113432578A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015227862A (en) * | 2014-06-02 | 2015-12-17 | 株式会社デンロコーポレーション | Additional stress estimation method of steel structure constituted of angle steel member |
| CN209055099U (en) * | 2018-09-11 | 2019-07-02 | 中交第三航务工程局有限公司 | A kind of high reliability bottom platform monitor for stress |
| CN209446021U (en) * | 2018-12-22 | 2019-09-27 | 中国计量科学研究院 | A kind of strain gauge caliberating device |
| CN210775881U (en) * | 2019-09-20 | 2020-06-16 | 武汉弘泰建筑工程质量检测有限公司 | Steel bar scanner |
| CN210917499U (en) * | 2019-09-20 | 2020-07-03 | 中电建路桥集团有限公司 | Fixing device for steel bar strain gauge |
| CN111855027A (en) * | 2020-07-30 | 2020-10-30 | 河北建设勘察研究院有限公司 | Stress monitoring method for bridge deck and newly-built bearing platform in bridge structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115565343A (en) * | 2022-09-27 | 2023-01-03 | 中交四公局第三工程有限公司 | Early warning monitoring method for karst tunnel structure safety |
| CN115565343B (en) * | 2022-09-27 | 2024-05-03 | 中交雄安建设有限公司 | Early warning and monitoring method for karst tunnel structure safety |
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Application publication date: 20210924 |