CN220982509U - Stress monitoring device in stone filling body - Google Patents
Stress monitoring device in stone filling body Download PDFInfo
- Publication number
- CN220982509U CN220982509U CN202323162007.7U CN202323162007U CN220982509U CN 220982509 U CN220982509 U CN 220982509U CN 202323162007 U CN202323162007 U CN 202323162007U CN 220982509 U CN220982509 U CN 220982509U
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- Prior art keywords
- resistance strain
- strain gauge
- top cover
- filling body
- base
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- 238000012806 monitoring device Methods 0.000 title abstract description 12
- 239000004575 stone Substances 0.000 title description 13
- 239000011435 rock Substances 0.000 claims abstract description 23
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 238000004080 punching Methods 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model belongs to the technical field of stress monitoring equipment, and provides a stress monitoring device in a rock filling body, a base, a top cover and a resistance strain gauge; the base is connected with the top cover and forms a placing space for placing the resistance strain gauge, and a fixing component for fixing the resistance strain gauge is arranged in the placing space; the top cover is provided with a conducting piece which can be in contact with the sensing part of the resistance strain gauge; the number of the resistance strain gauges is more than two. The size of the resistance strain type pressure gauge is reduced, the number of the resistance strain type pressure gauge is increased, the stress in the rock filling body can be accurately measured, the base and the top cover play a role in protecting the resistance strain type pressure gauge, and the damage rate of the resistance strain type pressure gauge is reduced.
Description
Technical Field
The utility model belongs to the technical field of stress monitoring equipment, and particularly relates to a stress monitoring device in a rock filling body.
Background
Monitoring of stresses in a rock filling has been a problem for engineering technicians. Conventional soil pressure gauges have a relatively small pressure surface diameter, only about 10cm, and are typically buried in the soil for monitoring the soil pressure. Because the particle size of the soil particles is smaller, gaps among the soil particles are smaller, and the soil pressure gauge is embedded therein, so that the soil pressure can be accurately measured.
The single block weight of the filled stone often reaches 100-500 kg, even in tons, the particle size of the stone is large, and the gap between the stone and the stone is obviously larger than the gap between soil particles, so that when the soil pressure gauge is embedded in the filled stone, the soil pressure gauge is likely to be exactly positioned in the gap, and thus static stress in the filled stone and dynamic stress caused by upper construction (such as dynamic compaction and rolling) cannot be monitored, or the monitored stress is severely distorted.
In addition, the conventional soil pressure gauge is buried in the rock filling body and is easy to damage, and particularly when the soil pressure gauge and a cable thereof are damaged when the dynamic compaction is performed above the rock filling body.
Disclosure of utility model
In order to overcome the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a device for monitoring stress in a rock filling body.
The technical scheme adopted for solving the technical problems is as follows:
a device for monitoring stress in a rock filling body, comprising:
The device comprises a base, a top cover and a resistance strain gauge;
The base is connected with the top cover and forms a placing space for placing the resistance strain gauge, and a fixing component for fixing the resistance strain gauge is arranged in the placing space;
the top cover is provided with a conducting piece which can be in contact with the sensing part of the resistance strain gauge;
the number of the resistance strain gauges is more than two.
Preferably, the base is a circular steel plate, the top cover is a circular steel plate, and the placing space is of a cylindrical structure.
Preferably, the resistance strain type pressure gauge is of a circular structure, the number of the resistance strain type pressure gauges is three, and the resistance strain type pressure gauges are uniformly distributed in the center of the placement space and along the radial direction of the placement space.
Preferably, the fixing component is three fixing columns, the three fixing columns form a circular surrounding space for surrounding the resistance strain gauge pressure gauge, the diameter size of the surrounding space is larger than that of the resistance strain gauge pressure gauge, and the height of the fixing columns is smaller than that of the resistance strain gauge pressure gauge.
Preferably, the fixing column is connected with the base in a welding mode.
Preferably, the conductive member is a steel gasket welded at the top cover, the steel gasket is circular, and the diameter size of the steel gasket is smaller than that of the resistance strain gauge.
Preferably, a circle of punching net is arranged along the edge of the top cover, the punching aperture of the punching net is smaller than or equal to 10mm, and the height of the punching net is smaller than that of the resistance strain gauge.
Preferably, the resistance strain gauge is provided with a cable for conducting data, a sleeve is sleeved outside the cable, the sleeve adopts a steel corrugated sleeve, and the ring rigidity of the sleeve is more than 16kN/m 2.
Preferably, the punching net is provided with a through hole for the cable and the sleeve to pass through.
Preferably, the top cover is provided with a plurality of bolt pieces, and one ends of the bolt pieces are connected with the base.
Compared with the prior art, the utility model has the beneficial effects that:
According to the application, the size of the resistance strain type pressure gauge is reduced, the number of the resistance strain type pressure gauges is increased, the stress in the rock filling body can be accurately measured, the base and the top cover play a role in protecting the resistance strain type pressure gauge, and the damage rate of the resistance strain type pressure gauge is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an assembled elevation of a stress monitoring device in a rock-fill body of the present utility model;
FIG. 2 is a schematic view of a base of the present utility model;
FIG. 3 is a schematic view of a top cover of the present utility model;
Fig. 4 is a schematic view of the embedded stress monitoring device in the rock filling body of the present utility model.
Wherein:
100-stress monitoring devices in the filled stone body, 101-top cover, 102-steel gasket, 103-punching net, 201-fixed column, 202-resistance strain gauge, 203-base, 301-bolt piece, 401-steel corrugated sleeve.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. The embodiments of the present utility model and the features in the embodiments may be combined with each other without collision. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, and the described embodiments are merely some, rather than all, embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Examples:
as shown in fig. 1 to 4, in this embodiment, there is provided a stress monitoring device in a rock filling body, including:
A base 203, a top cover 101 and a resistance strain gauge 202;
The base 203 is connected with the top cover 101 and forms a placing space for placing the resistance strain gauge 202, and a fixing component for fixing the resistance strain gauge 202 is arranged in the placing space;
The top cover 101 is provided with a conductive piece which can be contacted with the sensing part of the resistance strain gauge 202;
the number of resistance strain gauges 202 is two or more.
In this embodiment, the size of the resistance strain gauge 202 is reduced, and meanwhile, the number of the resistance strain gauge 202 is increased, so that the stress in the rock filling body can be accurately measured, the base 203 and the top cover 101 play a role in protecting the resistance strain gauge 202, and the damage rate of the resistance strain gauge 202 is reduced.
In this embodiment, the resistance strain gauges 202 of this embodiment have a circular structure, and the number of the resistance strain gauges 202 is three, and the resistance strain gauges 202 are uniformly distributed in the center of the placement space and along the radial direction of the placement space.
Meanwhile, as shown in fig. 2, the base 203 is a circular steel plate, the top cover 101 is a circular steel plate, and the placement space is a cylindrical structure. The base 203 is specifically a steel plate with a thickness of 5mm and a diameter of 500mm, the fixing component of the embodiment is arranged on the base 203, the fixing component is three fixing columns 201, the three fixing columns 201 form a circular surrounding space for surrounding the resistance strain gauge 202, the diameter size of the surrounding space is larger than that of the resistance strain gauge 202, the height of the fixing column 201 is smaller than that of the resistance strain gauge 202, and the fixing column 201 is connected with the base 203 in a welding mode.
As shown in fig. 3, the top cover 101 is specifically a steel plate with a thickness of 5mm and a diameter of 500mm, the conductive member is a steel gasket 102 welded at the top cover 101, the steel gasket 102 is circular, the diameter size of the steel gasket 102 is smaller than the diameter size of the resistance strain gauge 202, and the position of the steel gasket 102 corresponds to the position of the resistance strain gauge 202. Because the diameter of the steel gasket 102 is smaller than the diameter of the resistance strain gauge 202, it is ensured that the steel gasket 102 will not contact the outer rim of the resistance strain gauge 202, so that the pressure on the steel gasket 102 is fully transmitted to the diaphragm of the resistance strain gauge 202.
The connection structure of the base 203 and the top cover 101 is a detachable structure, specifically, a plurality of bolt pieces 301 are arranged on the top cover 101, one end of each bolt piece 301 is connected with the base 203, and the base 203 and the top cover 101 can be conveniently fixed or separated due to detachable connection, so that the resistance strain gauge 202 is convenient to install.
Meanwhile, in order to prevent the peripheral broken stone from entering the placing space to damage the resistance strain gauge 202, a circle of punching net 103 is arranged along the edge of the top cover 101, the punching aperture of the punching net 103 is smaller than or equal to 10mm, and the height of the punching net 103 is smaller than that of the resistance strain gauge 202.
The resistance strain gauge 202 of this embodiment is provided with a cable for conducting data, the cable is connected with an external instrument to receive stress data, a sleeve is sleeved outside the cable, the sleeve adopts a corrugated steel sleeve 401, the ring rigidity of the sleeve is greater than 16kN/m 2, the sleeve can be freely bent, one end of the sleeve extends into the stress monitoring device, and the other end extends out of the stone filling area.
Correspondingly, the punching net 103 is provided with a through hole for the cable and the sleeve to pass through.
The method for monitoring stress by using the stress monitoring device in the rock filling body of the embodiment comprises the following steps:
(1) Device assembly
After the base 203 and the top cover 101 are respectively processed, the base 203, the top cover 101 and the resistance strain gauge 202 are assembled into a whole device, namely the stress monitoring device 100 in the rock filling body.
(2) Sensor cable sleeve protection
The steel corrugated sleeve 401 is inserted into the stress monitoring device in the rock-fill body, and the cables of the three resistance strain gauges 202 are threaded into the steel corrugated sleeve 401 at the same time.
(3) The device is buried
As shown in fig. 4, the device is leveled near the point of implantation to ensure that the inclination of the device after placement is no greater than 5 °. The protection section of the corrugated steel pipe 401 is pulled out of the predetermined stone throwing area during placement. The tilt angle of the device is measured after placement and is used for correcting the stress monitoring result.
After the device is placed, the stone blocks are backfilled in layers until the design elevation is reached.
(4) Stress monitoring
The stress monitoring is carried out by adopting a dynamic strain data acquisition system, and the system consists of a USB data acquisition device with the A/D conversion speed of 100kHz/200kHz and corresponding dynamic signal analysis software. When the dynamic compaction is performed on the surface of the rock filling area, the stress waveform curves of the three resistance strain type pressure gauges 202 can be measured, and the impact instantaneous stress value can be obtained after conversion. The conversion formula is as follows: Where D is the diameter of the pressed surface of the resistance strain gauge 202, D is the diameter of the steel plate, and σ 1～σ3 is the measured stress values of the three gauges.
The present utility model is not limited to the preferred embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical proposal of the present utility model.
Claims (10)
1. A device for monitoring stress in a rock filling body, comprising:
The device comprises a base, a top cover and a resistance strain gauge;
The base is connected with the top cover and forms a placing space for placing the resistance strain gauge, and a fixing component for fixing the resistance strain gauge is arranged in the placing space;
the top cover is provided with a conducting piece which can be in contact with the sensing part of the resistance strain gauge;
the number of the resistance strain gauges is more than two.
2. The device for monitoring stress in a rock filling body according to claim 1, wherein the base is a circular steel plate, the top cover is a circular steel plate, and the placement space is a cylindrical structure.
3. The device for monitoring stress in a rock filling body according to claim 2, wherein the resistance strain type pressure gauge has a circular structure, the number of the resistance strain type pressure gauges is three, and the resistance strain type pressure gauges are uniformly distributed in the center of the placement space and along the radial direction of the placement space.
4. A device for monitoring stress in a rock filling body according to claim 3, wherein the fixing component is three fixing columns, the three fixing columns form a circular surrounding space for surrounding the resistance strain gauge, the diameter size of the surrounding space is larger than that of the resistance strain gauge, and the height of the fixing columns is smaller than that of the resistance strain gauge.
5. The device of claim 4, wherein the fixed post is connected to the base by welding.
6. A device for monitoring stress in a rock-fill mass according to claim 3, wherein the conductive member is a steel washer welded to the top cover, the steel washer is circular, and the diameter of the steel washer is smaller than the diameter of the resistance strain gauge.
7. The device for monitoring stress in a rock filling body according to claim 1, wherein a circle of punching net is arranged along the edge of the top cover, the punching aperture of the punching net is smaller than or equal to 10mm, and the height of the punching net is smaller than the height of the resistance strain gauge.
8. The device for monitoring stress in a rock filling body according to claim 7, wherein the resistance strain gauge is provided with a cable for conducting data, a sleeve is sleeved outside the cable, and the sleeve adopts a corrugated steel sleeve with the ring rigidity of more than 16kN/m 2.
9. The device for monitoring stress in a rock filling body according to claim 8, wherein the punching net is provided with a through hole for the cable and the sleeve to pass through.
10. The device for monitoring stress in a rock filling body according to claim 1, wherein a plurality of bolt members are provided on the top cover, and one ends of the bolt members are connected with the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323162007.7U CN220982509U (en) | 2023-11-22 | 2023-11-22 | Stress monitoring device in stone filling body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323162007.7U CN220982509U (en) | 2023-11-22 | 2023-11-22 | Stress monitoring device in stone filling body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220982509U true CN220982509U (en) | 2024-05-17 |
Family
ID=91059559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323162007.7U Active CN220982509U (en) | 2023-11-22 | 2023-11-22 | Stress monitoring device in stone filling body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220982509U (en) |
-
2023
- 2023-11-22 CN CN202323162007.7U patent/CN220982509U/en active Active
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