CN109029338A - A kind of embedded type concrete strain gauge means and its construction method - Google Patents
A kind of embedded type concrete strain gauge means and its construction method Download PDFInfo
- Publication number
- CN109029338A CN109029338A CN201810875877.3A CN201810875877A CN109029338A CN 109029338 A CN109029338 A CN 109029338A CN 201810875877 A CN201810875877 A CN 201810875877A CN 109029338 A CN109029338 A CN 109029338A
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- gasket ring
- strain gauge
- concrete strain
- fixed
- concrete
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- 239000004567 concrete Substances 0.000 title claims abstract description 84
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 239000011435 rock Substances 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 21
- 239000011469 building brick Substances 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 9
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 238000003466 welding Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 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
- G01B21/32—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention relates to a kind of concrete strain gauges, more particularly, to a kind of embedded type concrete strain gauge means and its construction method.The embedded type concrete strain gauge means, including the first gasket ring and the second gasket ring, the first gasket ring and the second gasket ring, which pass through fixed link and be fixed on Rock And Soil, faces sky side, avoids the erection and welding of auxiliary rotating hanging reinforcing bar, occupies little space, easy to use；For concrete strain gauge across being mounted between the first gasket ring and the second gasket ring, both ends are equipped with end seat and stress cake, guarantee concrete strain gauge stress along longitudinal direction；Concrete strain gauge is fixed on the first gasket ring and the second gasket ring by fixed wire, can be effectively eliminated the influence of traditional tied silk the binding concentrated force generated and frictional force, be guaranteed the accuracy of test result.
Description
Technical field
The present invention relates to a kind of concrete strain gauge, more particularly, to a kind of embedded type concrete strain gauge means and its
Construction method.
Background technique
Embedded type concrete strain gauge is often needed to use in field of civil engineering to carry out the stress of concrete structure
On the one hand strain monitoring can test the safety of concrete structure using concrete strain gauge, on the other hand can be to structure
Stress behavior carries out scientific research and explains.Embedded type concrete strain gauge be widely used in room build, tunnel, foundation pit, side slope, dike
The engineering fields such as dam are a kind of widely used components in geotechnical testament.
But it should be noted that the test structure of embedded type concrete strain gauge is affected by embedding manner, on the one hand,
To guarantee accuracy that concrete strain counts, component should ensure that stress along longitudinal direction, should not by relatively larger transverse concentrated force and
The interference of frictional force.On the other hand, embedded type concrete strain gauge is affected by steel bar arrangement, for reinforced concrete lining
It builds, embedded type concrete strain gauge can be bound on reinforcing bar, but this mode will receive the effect of tied silk and reinforcing bar frictional force,
The accuracy of data is impacted；For plain concrete construction, embedded type concrete strain gauge is difficult to arrange, such case needs
It wants field experiment personnel to arrange auxiliary bar, the arrangement of strain gauge is carried out using auxiliary bar, which is more complex, particularly with
Such as the higher position of tunnel top, standing room is small, it is difficult to carry out test job.And on-the-spot test generally requires at an arbitrary position
Place is simple, rapidly carries out the arrangement of component, does not impact to the construction speed of building.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of embedded type concrete strain gauge means and its construction method, this
Invention has many advantages, such as that structure is simple, is easy to make, at low cost, easy to use and measurement result is accurate.
The technical solution adopted by the present invention is that: a kind of embedded type concrete strain gauge means, including it is embedded to concrete
Interior concrete strain gauge, it is characterised in that: further include the first gasket ring and the second gasket ring for installing concrete strain gauge, institute
It states the first gasket ring and the second gasket ring passes through fixed link and is fixed on Rock And Soil and faces sky side, the concrete strain gauge is across being mounted on
Between first gasket ring and the second gasket ring, one end of the concrete strain gauge is stretched out outside the first gasket ring, and the other end stretches out the second pad
Outside ring, end is equipped with end seat and stress cake；The concrete strain gauge is equipped with the electronics group for measuring concrete strain
Part, the electronic building brick are arranged between the first gasket ring and the second gasket ring, and the p-wire of the electronic building brick stretches out outside concrete.
Preferably, first gasket ring and the second gasket ring are all made of the half-sectional metal circular tube knot of upper end opening lower end closed
Structure, connecting hole is equipped on first gasket ring and the second gasket ring, and fixed wire passes through connecting hole and is fixed on concrete strain gauge
On first gasket ring and the second gasket ring.
Further, the connecting hole is with the vertical range of corresponding first gasket ring or the second gasket ring bottom between concrete
Between the end seat outer diameter and stress cake diameter of strain gauge.
Preferably, the fixed link upper end is fixedly connected by screw thread with corresponding first gasket ring or the second gasket ring, under
End is fixedly connected by screw thread with Rock And Soil, and middle part is optical axis.
Preferably, the lower end that the fixed link is fixedly connected with Rock And Soil is taper.
Preferably, first gasket ring and the second gasket ring axis are on same straight line.
A kind of construction method of embedded type concrete strain gauge means, comprising the following steps:
A, the first gasket ring and the second gasket ring are fixed to Rock And Soil by fixed link and face sky side, it is deep that fixed link screws in Rock And Soil
Degree is 5~10cm, and the first gasket ring and the second gasket ring axis are on same straight line；
B, concrete strain gauge is across being placed on the first gasket ring and the second gasket ring；
C, concrete strain gauge and the first gasket ring and the second gasket ring are fixed with fixed wire；
D, casting concrete, it is desirable that the p-wire of electronic building brick leaks out outside concrete.
The beneficial effect that the present invention obtains is: the first gasket ring and the second gasket ring, which pass through fixed link and be fixed on Rock And Soil, faces sky
Side avoids the erection and welding of auxiliary rotating hanging reinforcing bar, occupies little space, easy to use；Concrete strain gauge is across being mounted on
Between one gasket ring and the second gasket ring, both ends are equipped with end seat and stress cake, guarantee concrete strain gauge stress along longitudinal direction；Concrete
Strain gauge is fixed on the first gasket ring and the second gasket ring by fixed wire, can effectively eliminate the concentrated force that traditional tied silk binding generates
With the influence of frictional force, guarantee the accuracy of test result.
Detailed description of the invention
Fig. 1 is the arrangement schematic diagram of traditional embedded type concrete strain gauge；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is the structural schematic diagram that the first gasket ring and Rock And Soil are fixed；
Fig. 4 is the side view of Fig. 3.
Specific embodiment
The present invention will be further explained in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, traditional concrete strain gauge 3, constructs before concrete, is bundled on reinforcing bar 6 by tied silk 7, this
Kind arrangement is affected by the arrangement of reinforcing bar 6, when hanging without reinforcing bar 6, then can not install concrete strain gauge 3, and tied silk
7 and 6 frictional force of reinforcing bar effect, influence will also result on the accuracy of data.
As in Figure 2-4, a kind of embedded type concrete strain gauge means of the invention, including the first gasket ring 1, second pad
Ring 2 and concrete strain gauge 3, the first gasket ring 1 and the second gasket ring 2 are fixed on Rock And Soil by fixed link 4 and face sky side, with tunnel
For test, if the concrete strain of measurement tunnel arch, below the Rock And Soil that the first gasket ring 1 and the second gasket ring 2 are in；If surveying
Measure the concrete strain of tunnel-side, the Rock And Soil side that the first gasket ring 1 and the second gasket ring 2 are in；If measuring tunnel bottom
Above the Rock And Soil that concrete strain, the first gasket ring 1 and the second gasket ring 2 are in.
For only stress along longitudinal direction as far as possible after guaranteeing in 3 Transducers Embedded in Concrete of concrete strain gauge, in the present embodiment, the first pad
When ring 1 and the second gasket ring 2 are installed, axis be on same straight line, the position of the concrete strain measured as needed, adjusts the
The relative position of one gasket ring 1 and the second gasket ring 2, one end of concrete strain gauge 3 are stretched out outside the first gasket ring 1, and the other end stretches out the
Outside two gasket rings 2, end is equipped with end seat 31 and stress cake 32, and concrete strain gauge 3 is equipped with for measuring concrete strain power
Electronic building brick 33,33 between the first gasket ring 1 and the second gasket ring 2, the p-wire of electronic building brick 33 stretches out for electronic building brick setting
It outside concrete, connect with external equipment, is transmitted for data.
In conjunction with shown in Fig. 3-4, the first gasket ring 1 is identical with the structure of the second gasket ring 2, and the first gasket ring 1 and the second gasket ring 2 are adopted
With the half-sectional round steel pipe structure of upper end opening lower end closed, the length of half-sectional round steel pipe is 5.2cm, outer diameter of steel pipes 35mm, internal diameter
Be equipped on 30mm, the first gasket ring 1 and the second gasket ring 2 connecting hole (11,21), the diameter of connecting hole is 2mm, connecting hole with it is corresponding
2 bottom of the first gasket ring 1 or the second gasket ring vertical range it is straight between 31 outer diameter of end seat and stress cake 32 of concrete strain gauge 3
Between diameter, in the present embodiment, vertical range of the connecting hole hole heart apart from gasket ring bottom is 32mm.Fixed wire 5 passes through connecting hole
Concrete strain gauge 3 is fixed on the first gasket ring 1 and the second gasket ring 2 by (11,21).Concrete strain gauge 3 and (this of fixed wire 5
Steel wire is used in embodiment) it is not directly contacted with, it avoids and the accuracy of DATA REASONING is impacted.
In the present embodiment, fixed link 4 is made of metal material, and the metallic rod of diameter 16mm, total length 30cm, upper end is set
There is fine thread 41, lower end is equipped with coarse thread 42, and middle part is optical axis 43.The upper end of fixed link 4 passes through fine thread 41 and the
One gasket ring or the threaded hole of the second gasket ring lower end are fixedly connected, and lower end is fixedly connected by coarse thread 42 with Rock And Soil.Closely-pitched
The nominal diameter of screw thread 41 is more smaller than 4 diameter of fixed link, nominal diameter 10mm, flight pitch 1mm；42 length of coarse thread is 5
~10cm, nominal diameter 16mm, flight pitch 2mm, the end of coarse thread 42 are pyramidal structure, and coning angle is 30 °, conical points
Screw thread is not set at angle.
Be illustrated by taking a certain Specific construction engineering as an example: scene is in certain mountain tunnel, and test purpose is that test element is mixed
The strain of solidifying soil lining cutting, Grades of Surrounding Rock are IV grades, and the first gasket ring 1 and the second gasket ring 2 are first passed through fine thread 41 and fixed link 4
It is connected and fixed, then the coarse thread 42 of 4 lower end of fixed link is screwed into Rock And Soil, entering Rock And Soil depth is 5~10cm, is protected
When demonstrate,proving the first gasket ring 1 and the installation of the second gasket ring 2, axis is on same straight line, and concrete strain gauge 3 is placed on the first gasket ring
1 and second on gasket ring 2, and finally with fixed wire 5 that concrete strain gauge 3 is fixed, then whole device is installed.It is poured in concrete
After building, the reading of data is carried out using p-wire 331.
Basic principle and key structural feature of the invention has been shown and described above.The present invention is not by the limit of examples detailed above
System, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It both falls in the range of claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (7)
1. a kind of embedded type concrete strain gauge means, including the concrete strain gauge (3) being embedded in concrete, feature
It is: further includes the first gasket ring (1) and the second gasket ring (2) for installing concrete strain gauge (3), first gasket ring (1)
Rock And Soil is fixed on by fixed link (4) with the second gasket ring (2) and faces sky side, and the concrete strain gauge (3) is across being mounted on
Between first gasket ring (1) and the second gasket ring (2), the first gasket ring (1) is stretched out outside in one end of the concrete strain gauge (3), another
The second gasket ring (2) are stretched out outside in end, and end is equipped with end seat (31) and stress cake (32)；The concrete strain gauge (3) is equipped with
For measuring the electronic building brick (33) of concrete strain, the electronic building brick (33) is arranged in the first gasket ring (1) and the second gasket ring
(2) between, the p-wire (331) of the electronic building brick (33) stretches out outside concrete.
2. embedded type concrete strain gauge means according to claim 1, it is characterised in that: first gasket ring (1)
It is identical with the second gasket ring (2) structure, it is all made of the half-sectional metal circular tube structure of upper end opening lower end closed, first gasket ring
(1) and on the second gasket ring (2) it is equipped with connecting hole (11,21), fixed wire (5) passes through connecting hole (11,21) for concrete strain
Meter (3) is fixed on the first gasket ring (1) and the second gasket ring (2).
3. embedded type concrete strain gauge means according to claim 2, it is characterised in that: the connecting hole (11,
21) with the vertical range of corresponding first gasket ring (1) or the second gasket ring (2) bottom between the end seat of concrete strain gauge (3)
(31) between outer diameter and stress cake (32) diameter.
4. embedded type concrete strain gauge means according to claim 1, it is characterised in that: on the fixed link (4)
End is fixedly connected by screw thread with corresponding first gasket ring (1) or the second gasket ring (2), and lower end connects by the way that screw thread and Rock And Soil are fixed
It connects, middle part is optical axis.
5. embedded type concrete strain gauge means according to claim 1, it is characterised in that: the fixed link (4) with
The lower end that Rock And Soil is fixedly connected is taper.
6. embedded type concrete strain gauge means according to claim 1, it is characterised in that: first gasket ring (1)
It is on same straight line with the second gasket ring (2) axis.
7. a kind of construction method of embedded type concrete strain gauge means, comprising the following steps:
A, the first gasket ring (1) and the second gasket ring (2) are fixed to Rock And Soil by fixed link (4) and face sky side, fixed link (4) screws in
Rock And Soil depth is 5~10cm, and the first gasket ring (1) and the second gasket ring (2) axis are on same straight line；
B, concrete strain gauge (3) is across being placed on the first gasket ring (1) and the second gasket ring (2)；
C, with fixed wire (5) that concrete strain gauge (3) and the first gasket ring (1) and the second gasket ring (2) are fixed；
D, casting concrete, it is desirable that the p-wire (331) of electronic building brick (33) leaks out outside concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810875877.3A CN109029338B (en) | 2018-08-03 | 2018-08-03 | Embedded concrete strain measurement device and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810875877.3A CN109029338B (en) | 2018-08-03 | 2018-08-03 | Embedded concrete strain measurement device and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109029338A true CN109029338A (en) | 2018-12-18 |
| CN109029338B CN109029338B (en) | 2024-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810875877.3A Active CN109029338B (en) | 2018-08-03 | 2018-08-03 | Embedded concrete strain measurement device and construction method thereof |
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| Country | Link |
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| CN (1) | CN109029338B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940439A (en) * | 2019-12-05 | 2020-03-31 | 武汉理工大学 | Improved embedded concrete strain gauge |
| CN112727094A (en) * | 2020-12-28 | 2021-04-30 | 山东建筑大学 | Device for conveniently pasting steel bar strain gauge and construction method thereof |
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| CN112727094A (en) * | 2020-12-28 | 2021-04-30 | 山东建筑大学 | Device for conveniently pasting steel bar strain gauge and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109029338B (en) | 2024-01-05 |
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