CN206945427U - A kind of pressure head for sonic test during rock triaxial compressions - Google Patents
A kind of pressure head for sonic test during rock triaxial compressions Download PDFInfo
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- CN206945427U CN206945427U CN201720664349.4U CN201720664349U CN206945427U CN 206945427 U CN206945427 U CN 206945427U CN 201720664349 U CN201720664349 U CN 201720664349U CN 206945427 U CN206945427 U CN 206945427U
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- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 239000011435 rock Substances 0.000 title claims abstract description 50
- 238000007906 compression Methods 0.000 title claims abstract description 38
- 230000006835 compression Effects 0.000 title claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 6
- 238000011161 development Methods 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000012669 compression test Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of pressure head for sonic test during rock triaxial compressions is the utility model is related to, its feature includes：Pressure head lid, pressure head body, gum cover, plug, sealing ring, compressing member, pressure head is made up of compressing member, sealing ring, pressure head lid, pressure head body, the pressure head lid is connected through a screw thread with pressure head body to be fixed together, the cavity for accommodating sonic probe is provided with pressure head body, pressure head body sidewall is provided with wire guide；The sonic probe wraps up its side wall with gum cover, and blend compounds plug is fixed in the cavity of pressure head body；Sealing ring is pressed in the wire guide of pressure head body sidewall by the compressing member.The utility model is simple in construction, easy to operate, strong applicability, available for sonic test of the rock sample under triaxial compressions or Uniaxial Compression, and sonic probe can be made not contact confined pressure oil under the conditions of triaxial compressions and do not acted on by confined pressure, probe is tested in the environment of close drying.
Description
Technical Field
The utility model belongs to the technical field of geotechnical engineering, especially, relate to a pressure head that is used for rock triaxial compression in-process sound wave test.
Background
With the arrival of underground space development hot tides and the construction of more and more hydroelectric nuclear power projects, more and more engineering buildings are in rock environments. However, the development of rock mechanics lags behind engineering applications, so it is important to understand the mechanism of rock failure under various loads and to quickly detect the mechanical properties of rock under various loads. Rock is a product of geological history, has specific material composition and structural structure, is a heterogeneous anisotropic material, and contains microcracks and sometimes macroscopic defects, such as cracks, holes, even joints and the like, so that the rock becomes a complex geologic body. In geotechnical engineering, the rock has different engineering mechanical properties and different mechanical responses under different loads, such as the development tendency of microcracks of the rock and the failure mechanism of the rock. The rock ultrasonic testing means provides an effective experimental approach for researching the mechanical properties of the rock under different loads.
The rock medium acoustic wave testing technology is a new technology developed for more than 30 years, is one of elastic wave testing methods, and the theoretical basis of the rock medium acoustic wave testing technology is established on the propagation theory of elastic waves in a solid medium. Compared with a statics method, the sound wave testing technology has the characteristics of simplicity, rapidness, reliability, economy, no damage and the like; the method is successfully used for the problems of the dynamic elasticity parameter test of the rock-soil mass, the simple rock-soil mass structure model parameter and the rock mass quality evaluation, and the like, so that the test technology has been widely regarded by the geotechnical engineering world at home and abroad.
The research on the acoustic wave characteristics in the rock has important significance for analyzing the rock fracture process, formulating the rock strength criterion, establishing a dynamic tension (compression) damage model and determining a dynamic damage threshold value. With the continuous and deep application of acoustic wave testing technology in geotechnical engineering, it has become more and more important to use acoustic wave characteristics to study the damage development process of rock and further provide a simple and practical acoustic wave theoretical model of rock damage evolution. Currently, researchers have succeeded in applying the acoustic wave testing means to the uniaxial compression test of the rock sample, and have obtained corresponding research results. For the triaxial compression test of the rock material, because the confining pressure medium is contained in the confining pressure cavity, the sound wave probe is attached to the surface of a loading pressure head or a test sample during the test, and the sound wave probe is soaked by the confining pressure medium and is subjected to the load transmitted by the medium, so that the test precision of the sound wave probe is reduced and even the sound wave probe fails. The utility model provides a pressure head for acoustic test among rock triaxial compression process for make the acoustic probe keep away from confining pressure medium, and not receive the load that the medium transmitted at rock material triaxial compression in-process, the quantity of the acoustic probe in the pressure head can artificial control, can make the acoustic test go on smoothly under the rock material triaxial compression condition.
Disclosure of Invention
The utility model aims at providing a pressure head for test of rock triaxial compression in-process sound wave can make the sound wave probe keep away from the confined pressure medium in rock material triaxial compression in-process, and do not receive the load that the confined pressure medium transmitted, and sound wave probe quantity in the pressure head can artificial control.
Therefore, the utility model provides a pressure head for test of rock triaxial compression in-process sound wave, its characteristic includes: the pressure head comprises a pressure head cover, a pressure head body, a rubber sleeve, a rubber plug, a sealing ring and a pressure head body, wherein the pressure head cover and the pressure head body are fixedly connected together through threads; the side wall of the sound wave probe is wrapped by a rubber sleeve and is fixed in the cavity of the pressure head body by a rubber plug; the pressing piece is used for pressing the sealing ring in the outer lead hole in the side wall of the pressing head body.
The pressure head for the sound wave test in the triaxial compression process of the rock is characterized in that a section of thread is processed on the outer wall of the pressure head body close to the top end of the wire guide hole, a section of thread is processed on the inner wall of the pressure head cover, and the pressure head body and the pressure head cover are fixedly connected through the thread to achieve a sealing effect.
The pressure head for testing the sound waves in the triaxial compression process of the rock is characterized in that the side wall of the pressure head body is provided with a wire guide hole, the wire guide hole of the side wall of the pressure head body is divided into an inner wire guide hole I and an outer wire guide hole II, and the outer wire guide hole II is provided with an internal thread.
The pressure head for testing the sound wave in the triaxial compression process of the rock is characterized in that the cavity inside the pressure head body is used for accommodating the sound wave probe, the rubber sleeve and the rubber plug.
The pressing head for the sound wave test in the triaxial compression process of the rock is characterized in that the pressing piece is internally provided with a wire guide hole, the outer wall of the pressing piece is provided with an external thread, and the pressing piece is fixed with the pressing head body through threaded connection.
The pressure head for testing the sound waves in the triaxial compression process of the rock is characterized in that the sealing ring is fixed in the outer wire hole II through the compression piece, and the sealing ring is deformed under the extrusion action of the compression piece, so that the wires in the outer wire hole are locked, and the sealing effect is achieved.
The pressure head for the sound wave test in the triaxial compression process of the rock can be used for the sound wave test in the conventional triaxial compression process and can also be used for the sound wave test in the conventional uniaxial compression process.
The pressure head for the sound wave test in the triaxial compression process of the rock is characterized in that a sound wave probe hole is formed in the rubber sleeve, the sound wave probe hole penetrates from the top to the bottom, and a wire guide groove is formed in the top of the sound wave probe hole.
The pressure head for the acoustic wave test in the triaxial compression process of the rock is characterized in that the number of the acoustic wave probe holes in the rubber sleeve can be adjusted according to test requirements, and the specific arrangement number can be 1-4.
The pressure head for the sound wave test in the triaxial compression process of the rock is characterized in that the number of the plug heads of the rubber plugs is the same as that of the sound wave probe holes in the rubber sleeve, and the rubber plugs are used for pressing the sound wave probes in the rubber sleeve.
The pressure head for the sound wave test in the triaxial compression process of the rock is characterized in that the typical material adopted by the rubber sleeve and the rubber plug is silica gel.
The utility model discloses a characteristics and advantage are: the utility model has the advantages of being simple in structure and convenient in operation, because the pressure head lid passes through threaded connection with the pressure head body and is fixed together, the pressure head body seals the wire of outer wire guide II department through pressing down a and sealing washer for the inside cavity of pressure head body keeps totally sealed, and sound wave probe passes through the better silica gel of elasticity and fixes inside the pressure head body. The utility model has simple structure, convenient operation and strong applicability, can be used for the sound wave test of rock samples under the condition of three-axis or single-axis, and can ensure that the sound wave probe does not contact confining pressure medium and is not subjected to the confining pressure in the process of the three-axis compression test, and the sound wave probe is tested in a closed and dry environment; because the acoustic wave probes are fixed by the rubber sleeve and the rubber plug, and a plurality of acoustic wave probe holes are formed in the rubber sleeve, the arrangement number of the acoustic wave probes can be flexibly arranged according to test requirements.
Drawings
The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention. Wherein,
FIG. 1 is a schematic view of the overall layout of the indenter and the test piece of the present invention;
FIG. 2 is a schematic sectional view of the overall layout of the indenter and the test piece of the present invention;
fig. 3 is a schematic view showing the fit of the pressing head body, the sealing ring and the pressing member of the present invention;
FIG. 4 is a schematic diagram of the specification of the utility model;
FIG. 5 is a schematic view showing the combination of the rubber sleeve, the acoustic probe and the rubber plug;
fig. 6 is a schematic view of the overall fit of the indenter of the present invention.
The reference numbers illustrate:
1. pressing the head cover; 2. a pressing head body; 3. a test piece; 4. a rubber sleeve; 5. a rubber plug; 6. a wire; 7. a seal ring; 8. a compression member; 9. a wire guide groove; 10. A sonic probe; I. an inner wire hole; II. An outer wire guide.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, a pressure head for testing sound waves in a triaxial compression process of a rock is characterized by comprising a pressure head cover 1, a pressure head body 2, a rubber plug 5, a rubber sleeve 4, a sealing ring 7 and a pressing piece 8, wherein the pressure head is composed of the pressing piece 8, the sealing ring 7, the pressure head cover 1 and the pressure head body 2 are fixedly connected together through threads, a cavity for accommodating a sound wave probe 10 is formed in the pressure head body 2, and a wire guide hole is formed in the side wall of the pressure head body 2; the side wall of the sound wave probe 10 is wrapped by a rubber sleeve 4 and is fixed in the cavity of the pressure head body 2 by a rubber plug 5; the pressing piece 8 is used for pressing the sealing ring 7 in the outer wire hole II on the side wall of the pressure head body 2.
Further, a section of thread is processed on the outer wall of the pressure head body 2 close to the top end of the wire guide hole, a thread is processed on the inner wall of the pressure head cover 1, the pressure head cover 1 and the pressure head body 2 are fixedly connected together through the thread, and a sealing effect is achieved; the side wall of the pressure head body 2 is provided with a wire guide hole, the wire guide hole on the side wall of the pressure head body 2 is divided into an inner wire guide hole I and an outer wire guide hole II, the outer wire guide hole II is provided with an inner thread, the outer side of the pressing piece 8 is provided with an outer thread, the inside of the pressing piece 8 is provided with a wire guide hole, and the sealing ring 7 is fixed in the outer wire guide hole II through the pressing piece 8.
Furthermore, sound wave probe holes are formed in the rubber sleeve 4 and penetrate from the top to the bottom, a wire guide groove 9 is formed in the surface of the rubber sleeve, and the number of the sound wave probe holes in the rubber sleeve can be adjusted according to test requirements; the number of plug heads of the rubber plug 5 is the same as that of the sound wave probe holes in the rubber sleeve 4.
Example 1
A pressure head for testing sound waves in a triaxial compression process of a rock comprises the following steps of:
firstly, the number of the acoustic probes 10 required in each pressure head is determined according to the test requirements, and therefore the rubber sleeve 4 containing the corresponding number of acoustic probe holes is selected. And smearing the couplant on the bottom of the sound wave probe 10, placing the couplant into a sound wave probe hole of the rubber sleeve 4, and enabling the lead 6 to penetrate through a lead hole in the side wall of the pressure head body 2 to be connected with the sound wave probe 10. The remaining acoustic probes 10 are placed in the rubber sleeve 4 and connected to the conductor 6 by a corresponding method.
The rubber sleeve 4 with the sound wave probe 10 placed thereon is carefully placed into the pressure head body 2, the wires are arranged along the wire groove 9 on the rubber sleeve 4, then the rubber plug 5 is aligned with the sound wave probe hole in the rubber sleeve 4, and the sound wave probe 10 is fixed in the pressure head body 2. Subsequently, the sealing ring 7 is fixed inside the outer wire hole II on the side wall of the pressure head body 2 by the pressing member 8, and the sealing ring 7 is pressed by the pressing member 8, so that the wire 6 is locked. Screwing the pressure head cover 1 on the pressure head body 2 to tightly screw the threads on the pressure head cover 1 and the pressure head body 2 so as to achieve sealing. In a corresponding manner, the other acoustic probe 10 is fixed in the other indenter.
Placing the processed core between two pressure heads, fixing the end part of the test piece on the pressure heads by using a self-adhesive tape, then sleeving a section of heat-shrinkable tube on the test piece and the pressure heads, and heating and shrinking the heat-shrinkable tube by using a heat blowing gun so as to wrap the test piece and the pressure heads together. And finally, winding the end part of the heat-shrinkable tube tightly by using an electric adhesive tape so as to seal the test piece. And then placing the test piece and the pressure head in an MTS conventional triaxial tester to perform a conventional triaxial test.
Example 2
The utility model provides a pressure head for rock triaxial compression in-process sound wave test, the sound wave monitoring step when carrying out the unipolar test is with embodiment 1, the difference lies in, the test piece only need be fixed at the pressure head tip with self-adhesive tape, need not wrap up with the pyrocondensation pipe.
Claims (7)
1. A pressure head for testing acoustic waves in a triaxial compression process of a rock is characterized by comprising: the pressure head comprises a pressure head cover, a pressure head body, a rubber sleeve, a rubber plug, a sealing ring and a pressure head body, wherein the pressure head cover and the pressure head body are fixedly connected together through threads; the side wall of the sound wave probe is wrapped by a rubber sleeve and is fixed in the cavity of the pressure head body by a rubber plug; the pressing piece is used for pressing the sealing ring in the outer lead hole in the side wall of the pressing head body.
2. The indenter of claim 1, wherein the side wall of the indenter body is provided with wire guides, the wire guides of the side wall of the indenter body are divided into an inner wire guide I and an outer wire guide II, and the outer wire guide II is provided with internal threads.
3. The pressure head for testing the sound waves in the triaxial compression process of the rock according to claim 1, wherein the sealing ring is fixed in the outer wire guide hole II through a compression member, and the sealing ring is deformed through the extrusion effect of the compression member, so that the wires in the wire guide hole are locked, and the sealing effect is achieved.
4. The indenter of claim 1, wherein a sound probe hole is formed in the rubber sleeve, and the sound probe hole penetrates from the top to the bottom, and a wire guide groove is formed in the top of the sound probe hole.
5. The pressure head for the acoustic wave test in the triaxial compression process of the rock according to claim 1, wherein the number of the acoustic wave probe holes in the rubber sleeve can be adjusted according to test requirements, and the specific arrangement number can be 1-4.
6. The indenter of claim 1, wherein the number of plugs of the rubber plug is the same as the number of sound wave probe holes in the rubber sleeve, and the rubber plug is used for pressing the sound wave probe in the rubber sleeve.
7. A indenter for sonic testing during triaxial compression of rock according to claim 1, wherein the typical material used for the rubber sleeve and the rubber plug is silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720664349.4U CN206945427U (en) | 2017-06-09 | 2017-06-09 | A kind of pressure head for sonic test during rock triaxial compressions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720664349.4U CN206945427U (en) | 2017-06-09 | 2017-06-09 | A kind of pressure head for sonic test during rock triaxial compressions |
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| Publication Number | Publication Date |
|---|---|
| CN206945427U true CN206945427U (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720664349.4U Active CN206945427U (en) | 2017-06-09 | 2017-06-09 | A kind of pressure head for sonic test during rock triaxial compressions |
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| Country | Link |
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| CN (1) | CN206945427U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303310A (en) * | 2018-02-07 | 2018-07-20 | 成都理工大学 | Rock ordinary triaxial test test specimen sealing device and its application method |
| CN108490070A (en) * | 2018-02-23 | 2018-09-04 | 清华大学 | A kind of jointed rock mass sample ultrasonic testing equipment |
| CN111579405A (en) * | 2020-05-20 | 2020-08-25 | 河南工程学院 | Multifunctional rock test system |
-
2017
- 2017-06-09 CN CN201720664349.4U patent/CN206945427U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303310A (en) * | 2018-02-07 | 2018-07-20 | 成都理工大学 | Rock ordinary triaxial test test specimen sealing device and its application method |
| CN108490070A (en) * | 2018-02-23 | 2018-09-04 | 清华大学 | A kind of jointed rock mass sample ultrasonic testing equipment |
| CN108490070B (en) * | 2018-02-23 | 2019-10-01 | 清华大学 | A kind of jointed rock mass sample ultrasonic testing equipment |
| CN111579405A (en) * | 2020-05-20 | 2020-08-25 | 河南工程学院 | Multifunctional rock test system |
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