CN216247559U - Many occasions shear test device - Google Patents
Many occasions shear test device Download PDFInfo
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- CN216247559U CN216247559U CN202122863268.6U CN202122863268U CN216247559U CN 216247559 U CN216247559 U CN 216247559U CN 202122863268 U CN202122863268 U CN 202122863268U CN 216247559 U CN216247559 U CN 216247559U
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Abstract
The utility model discloses a multi-occasion shear test device, which belongs to the technical field of rock geotechnical tests and comprises an upper shear device (2) and a lower shear device (1), wherein the lower shear device (1) is internally provided with a first shear loading carrier (13) and a first sleeve (12) which are used for transmitting load upwards, and the first shear loading carrier (13) is detachably arranged in the first sleeve (12); the upper shearing device (2) comprises a second shearing and loading body (23) and a second sleeve (22) for downward load transmission, and the second shearing and loading body (23) is detachably arranged in the second sleeve (22); the first shearing and carrying body (13) and the second shearing and carrying body (23) are both detachable structures, and shearing and carrying bodies with different sections can be replaced; be equipped with the clearance between first sleeve (12) and first box (11), during the lower extreme just imbeds the clearance of upper portion shearing mechanism (2), can effectively fix the test piece position, make test data more accurate reliable.
Description
Technical Field
The utility model relates to the technical field of rock mass geotechnical tests, in particular to a multi-situation shear test device.
Background
The shear strength of soil refers to the ability of soil body to resist shear failure, when the soil body is acted by external load, each point of the soil body will generate shear stress and shear deformation. If the shear stress of a certain point in the soil reaches the shear strength, the point can be subjected to shear failure to form a continuous sliding surface, so that the whole soil body is unstable and loses stability. Shear strength of soil is measured by an indoor geotechnical shear test. When a shear test is carried out, whether the position of a test piece moves or not and the difference of the shear area greatly influence the test result, so that the test strength and the real strength are greatly different.
In the existing test, a test piece is directly placed on a bottom plate of a rigid servo rock triaxial test machine, and the test piece is easy to move in the test process, so that the test result is inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multi-occasion shear test device mainly aiming at the unfavorable limitation existing in the shear test in the prior art.
The purpose of the utility model is realized by the following technical scheme:
the multi-occasion shear test device comprises an upper shear device and a lower shear device, wherein the lower shear device comprises a first box body, a first sleeve and a first shear loading body, the first shear loading body is used for transmitting load upwards, the first sleeve is sleeved in the first box body, and the first shear loading body is detachably arranged in the first sleeve; the upper shearing device comprises a second box body, a second sleeve and a second shearing and loading body for downward load transmission, the second sleeve is sleeved in the second box body, and the second shearing and loading body is detachably arranged in the second sleeve; the first sleeve and the second sleeve are oppositely arranged, and the first shear-adding carrier and the second shear-adding carrier are arranged in a staggered manner;
a gap is formed between the first sleeve and the first box body, and the lower end of the upper shearing device is embedded into the gap.
As a preferred option, the lower shearing device and the upper shearing device are connected through a screw, the lower end of the screw is fixedly connected with the bottom of the first box body, and the upper end of the screw is movably connected with the bottom of the second box body;
the first box body is internally provided with a square body with an upper opening, steel plates are arranged on two sides of the square body, two short columns are arranged at one diagonal of the bottom of the square body, two threaded holes are arranged at the other diagonal of the bottom of the square body, and the threaded holes are connected with the lower end of the screw rod.
Preferably, the first sleeve is provided with at least two studs inside, and the bottom of the first shear-plus-carrier is provided with holes correspondingly connected with the studs.
As a preferred option, the second box body is a square body with a downward opening, and a hole connected with the upper end of the screw rod extends outwards from the lower ends of the two sides of the second box body respectively.
Preferably, a threaded column is arranged inside the second sleeve, and the upper part of the second shear-plus-carrier is provided with a hole correspondingly connected with the threaded column.
As a preferred item, the bottom of the first box body is provided with a supporting circular truncated cone.
Preferably, the loading section of the first shear-plus-support is a semicircle, and the loading section of the second shear-plus-support is a semicircle.
Preferably, the loading section of the first shear-plus-carrier is a circular ring, and the loading section of the second shear-plus-carrier is a circular ring.
Preferably, the loading cross section of the first shear-plus-support is circular, and the loading cross section of the second shear-plus-support is circular.
As a preference, the width of the first casing is larger than the width of the second casing.
It should be further noted that the technical features corresponding to the above options can be combined with each other or replaced to form a new technical solution.
Compared with the prior art, the utility model has the beneficial effects that:
(1) a gap is formed between the first sleeve and the first box body, the lower end of the upper shearing device is just embedded into the gap, and a test piece is placed between the upper shearing device and the lower shearing device, so that the position of the test piece can be effectively fixed, and test data are more accurate and reliable.
(2) The first shearing and carrying body and the second shearing and carrying body are both detachable structures, the shearing and carrying bodies with different sections can be replaced to meet the requirements on different cut sections, and the shearing and carrying device is suitable for multi-occasion shearing tests.
Drawings
FIG. 1 is a schematic diagram of an overall assembly structure of a multi-field shear test apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of a first case according to the present invention;
FIG. 3 is a top plan view of the lower shear device of the present invention;
FIG. 4 is a schematic view of a first sleeve according to the present invention;
FIG. 5 is a schematic diagram of a first shear-plus-support of the present invention;
FIG. 6 is a schematic structural view of a second case according to the present invention;
FIG. 7 is a schematic view of a second sleeve according to the present invention;
FIG. 8 is a schematic diagram of a second shear-plus-support of the present invention;
FIG. 9 is an overall assembly view of the present invention;
fig. 10 and 11 are schematic diagrams of the positional relationship between the loaded test piece and the loading body according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are directions or positional relationships described based on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The first shearing and carrying body 13 and the second shearing and carrying body 23 are designed to be detachable structures, and shearing and carrying bodies with different sections can be replaced to meet the requirements on different sheared sections, so that the shearing and carrying device is suitable for multi-occasion shearing tests; the test piece is placed between the upper shearing device 2 and the lower shearing device 1, the upper shearing device 2 and the lower shearing device 1 are connected up and down, and the lower end of the upper shearing device is just embedded into the gap of the lower shearing device 1, so that the position of the test piece can be effectively fixed, and test data are more accurate and reliable.
Example 1
In an exemplary embodiment, a multi-situation shear test device is provided, as shown in fig. 1, comprising an upper shear device 2 and a lower shear device 1, wherein the lower shear device 1 comprises a first box 11, a first sleeve 12 and a first shear-adding body 13 for transmitting load upwards, the first sleeve 12 is sleeved in the first box 11, and the first shear-adding body 13 is detachably mounted in the first sleeve 12;
the upper shearing device 2 comprises a second box body 21, a second sleeve 22 and a second shearing and carrying body 23 for downward load transmission, wherein the second sleeve 22 is sleeved in the second box body, and the second shearing and carrying body 23 is detachably arranged in the second sleeve 22; the first sleeve 12 and the second sleeve 22 are oppositely arranged, and the first shear-plus-carrier 13 and the second shear-plus-carrier 23 are arranged in a staggered manner;
a gap is formed between the first sleeve 12 and the first box body 11, and the lower end of the upper shearing device 2 is embedded into the gap.
Specifically, in use, the first shear-plus-carrier 13 is first installed in the first sleeve 12, the first sleeve 12 is then installed in the first casing 11, the assembly of the lower shear device 1 is completed, and similarly, the second shear-plus-carrier 23 is installed in the second sleeve 22, the second sleeve 22 is then installed in the second casing 21, the assembly of the upper shear device 2 is completed, and the lower shear device 1 is installed on the rigid servo rock triaxial tester chassis. In practice, a round hole is formed in the bottom of the lower shearing device 1, a screw is arranged on a bottom plate of the rigid servo rock triaxial test machine and is exactly aligned with the round hole in the bottom of the lower shearing device 1, and therefore the experimental device and the power device are connected.
Further, the loading test piece is mounted on the first shear-adding body 13 in the first sleeve 12, and then the upper shearing device 2 is slid down along the gap between the first sleeve 12 and the first case 11 until the upper and lower sides of the loading test piece are completely contacted with the first shear-adding body 13 and the second shear-adding body 23, respectively. As shown in fig. 9, is a schematic of the assembled overall structure.
Specifically, taking a PTS loading test piece as an example, the PTS loading test piece is a special cylindrical test piece, two concentric circular cracks with different depths are preformed on two parallel cross sections of the test piece along the cylindrical axis direction of the test piece, the first shearing and loading body 13 and the second shearing and loading body 23 are respectively embedded into the different cracks, and a complete cylindrical area at the center is loaded.
Furthermore, the loading section means that a loading test piece is installed in an experimental device, a testing machine is used for applying load to a shearing device, the loading test piece bears shearing deformation at the moment, the section in contact with the loading test piece is called the loading section, the shearing area can be changed by utilizing a cutting technology, the requirements on different shearing sections are met, and the multi-situation shearing test is suitable. After the device is installed, the testing machine respectively applies acting force from top to bottom, the lower shearing device 1 and the upper shearing device 2 move oppositely, and the loaded test piece generates deformation through extrusion, wherein the first shearing carrier 13 and the second shearing carrier 23 are opposite in dislocation, and the loaded test piece is subjected to dislocation load to generate shearing stress, so that the shearing strength of the test piece can be tested.
Example 2
Based on embodiment 1, a specific structure of a multi-situation shear test device is provided, as shown in fig. 1, 2 and 3, the lower shearing device 1 and the upper shearing device 2 are connected through a screw rod 3, the lower end of the screw rod 3 is fixedly connected with the bottom of the first box body 11, and the upper end of the screw rod 3 is movably connected with the bottom of the second box body 21. The first box body 11 is internally provided with a square body with an upper opening, steel plates 14 are arranged on two sides of the square body, two short posts 15 are arranged at one opposite diagonal position of the bottom of the square body, two threaded holes 16 are arranged at the other opposite diagonal position of the bottom of the square body, and the threaded holes 16 are connected with the lower end of the screw rod 3.
Specifically, the lower end of the upper shearing device 2 slides down along the screw rod 3 and then is installed in the gap of the lower shearing device 1, the upper shearing device 2 is directly arranged in the screw rod 3 through an external cavity reserved by the upper shearing device 2, the upper shearing device 2 is smaller than the lower shearing device 1, a gap also exists between the second box body 21 and the second sleeve 22 of the upper shearing device 2, the gap exists between the box body and the sleeve of the lower shearing device, the screw rod 3 is just positioned in the gap, the box body of the upper shearing device can just enter the gap to be fixed, and the upper shearing device cannot easily shake, wherein the second sleeve 22 is positioned above the first sleeve 12, a loading test piece is just clamped between the first shearing and loading bodies 13 and 23, and therefore, after the whole assembly of the shearing test device is finished, a test can be started.
Further, the testing machine is from upper and lower application effort respectively, when applying the effort, upper portion shearing mechanism 2 and lower part shearing mechanism 1 can remove, can guarantee through setting up of screw rod 3 that the test piece is in left right side fixed state always, can not let the test piece remove about, lead to experimental error, it need notice that the 3 upper ends of screw rod do not need to be fixed, the screw rod is for upper portion shearing mechanism 2 can the lapse, also for better installation upper portion device, 2 salient parts of upper portion shearing mechanism do not have the screw thread, if the loading sample is long, just lean on this fixing device.
Further, as shown in fig. 4 and 5, at least two studs 15 are provided inside the first sleeve 12, and the bottom of the first shear-plus-carrier 13 is provided with holes correspondingly connected with the studs 15.
Further, as shown in fig. 6, the second box 21 is a square body with a downward opening, and a hole connected with the upper end of the screw 3 extends outwards from the lower end of each of two sides of the second box 21.
Further, as shown in fig. 7, a threaded column 221 is provided inside the second sleeve 22, and the upper portion of the second shear-adding body 23 is provided with a hole correspondingly connected with the threaded column 221, so that the upper shear device 2 can slide down along the screw 3, and the distance between the upper shear device 2 and the lower shear device 1 can be adjusted.
Further, as shown in fig. 1, a supporting circular truncated cone 4 is arranged at the bottom of the first box 11, and is used for supporting the whole device, so that the stability of the device is ensured.
Specifically, the first shear-plus-carrier 13 is mounted on the stubs 15 in the first sleeve 12 through corresponding holes, the structure of 4 stubs being shown in fig. 4, and the position of the first shear-plus-carrier 13 can be fixed by actually using any two stubs 15. The first sleeve 12 with the first shear-plus-carrier 13 mounted thereon is mounted in the first housing 11, and the position of the first sleeve 12 is controlled by the diagonal stubs, and then the screw 3 is attached at the screw hole 16.
Further, the positions of the two semicircular loading sections are not well grasped during installation, so that the installation direction of the first shear-loading carrier 13 can be determined by the two short posts at the fixed positions, which is equivalent to that two points determine a straight line, and the installation is convenient to guide.
Further, the second shear-adding body 23 is correspondingly connected with the threaded post 221 through a corresponding hole, the second shear-adding body 23 is installed in the second sleeve 22, the nut is tightened so that the second shear-adding body 23 does not slide downward, the installation of the upper shearing device 2 is completed after the second sleeve 22 is connected with the second casing 21 through the bolt, and then the upper shearing device 2 is installed on the upper portion of the lower shearing device 1 through the screw 3.
The whole device adopts an upper structure and a lower structure, so that the position of a loading test piece can be effectively fixed, the loading test piece is prevented from moving, and test data is more accurate and reliable.
Example 3
In another embodiment, the loaded specimen is sleeved in a cylinder between two shearing devices, and the loading cross sections of the first shear-adding body 13 and the second shear-adding body 23 are semi-circles/rings/circles or other shapes. Different carriers can be replaced in a detachable mode, and different test requirements are met.
Specifically, if the loading section is a semicircle, the upper and lower loading sections are oppositely arranged, so that the test piece is just damaged by half-and-half deformation, and if the loading section is an upper circle and a lower circle, the test piece can be damaged from the middle.
As shown in fig. 10 and 11, for example, the PTS loading test piece is a special cylindrical test piece, two concentric circular cracks with different depths are preformed on two parallel cross sections of the test piece along the cylindrical axis direction of the test piece, the first shearing and loading body 13 and the second shearing and loading body 23 are respectively embedded into the different cracks, and a complete cylindrical area at the center is loaded.
Further, the width of the first box 11 is slightly larger than the width of the second box 21, and two shearing devices with different lengths are designed, the length of the sample box parallel to the shearing direction is not reduced as the shearing displacement of the sample increases, the calculated shearing stress error is controlled in a smaller range, and the calculated shearing stress value is more accurate.
The above detailed description is for the purpose of describing the utility model in detail, and it should not be construed that the detailed description is limited to the description, and it will be apparent to those skilled in the art that various modifications and substitutions can be made without departing from the spirit of the utility model.
Claims (10)
1. The multi-occasion shear test device is characterized by comprising an upper shear device (2) and a lower shear device (1), wherein the lower shear device (1) comprises a first box body (11), a first sleeve (12) and a first shear loading body (13) used for transmitting load upwards, the first sleeve (12) is sleeved in the first box body (11), and the first shear loading body (13) is detachably arranged in the first sleeve (12);
the upper shearing device (2) comprises a second box body (21), a second sleeve (22) and a second shearing and loading body (23) used for transferring load downwards, the second sleeve (22) is sleeved in the second box body, and the second shearing and loading body (23) is detachably arranged in the second sleeve (22); the first sleeve (12) and the second sleeve (22) are arranged oppositely, and the first shearing and carrying body (13) and the second shearing and carrying body (23) are arranged in a staggered mode;
a gap is arranged between the first sleeve (12) and the first box body (11), and the lower end of the upper shearing device (2) is embedded into the gap.
2. The multi-occasion shear test device according to claim 1, wherein the lower shearing device (1) and the upper shearing device (2) are connected through a screw (3), the lower end of the screw (3) is fixedly connected with the bottom of the first box body (11), and the upper end of the screw (3) is movably connected with the bottom of the second box body (21);
the first box body (11) is internally provided with a square body with an upper opening, steel plates (14) are arranged on two sides of the square body, two short columns (15) are arranged at one opposite diagonal position of the bottom of the square body, two threaded holes (16) are arranged at the other opposite diagonal position of the bottom of the square body, and the threaded holes (16) are connected with the lower end of the screw rod (3).
3. A multi-field shear test device according to claim 1, wherein said first sleeve (12) is internally provided with at least two stubs (15), and the bottom of said first shear-loading body (13) is provided with holes for corresponding connection with said stubs (15).
4. A multi-field shear test apparatus according to claim 2, wherein said second housing (21) is a square body with a downward opening, and a hole connected to the upper end of said screw (3) is respectively extended outwards from the lower end of the two sides of said second housing (21).
5. A multi-field shear test device according to claim 1, wherein said second sleeve (22) is internally provided with a threaded post (221), and the upper portion of said second shear-plus-carrier (23) is provided with a hole corresponding to said threaded post (221).
6. A multi-field shear test device according to claim 2, wherein the bottom of said first box (11) is provided with a supporting truncated cone (4).
7. A multi-context shear test device according to claim 1, wherein the loading cross-section of the first shear-plus-support (13) is a semi-circle and the loading cross-section of the second shear-plus-support (23) is a semi-circle.
8. A multi-context shear test device according to claim 1, wherein the loading cross-section of the first shear-plus-carrier (13) is a circular ring and the loading cross-section of the second shear-plus-carrier (23) is a circular ring.
9. A multi-context shear test device according to claim 1, wherein the loading cross-section of the first shear-plus-carrier (13) is circular and the loading cross-section of the second shear-plus-carrier (23) is circular.
10. A multi-context shear test device according to claim 1, wherein the width of the first housing (11) is greater than the width of the second housing (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122863268.6U CN216247559U (en) | 2021-11-18 | 2021-11-18 | Many occasions shear test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122863268.6U CN216247559U (en) | 2021-11-18 | 2021-11-18 | Many occasions shear test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216247559U true CN216247559U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122863268.6U Active CN216247559U (en) | 2021-11-18 | 2021-11-18 | Many occasions shear test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216247559U (en) |
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2021
- 2021-11-18 CN CN202122863268.6U patent/CN216247559U/en active Active
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