CN215492911U - Shear test box and test system comprising same - Google Patents
Shear test box and test system comprising same Download PDFInfo
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- CN215492911U CN215492911U CN202121419727.5U CN202121419727U CN215492911U CN 215492911 U CN215492911 U CN 215492911U CN 202121419727 U CN202121419727 U CN 202121419727U CN 215492911 U CN215492911 U CN 215492911U
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Abstract
The utility model discloses a shear test box and a test system comprising the same, wherein the shear test box comprises an upper shear test box and a lower shear test box which are arranged up and down symmetrically; the upper shear test box and the lower shear test box have the same structure and respectively comprise a bearing plate, a sample accommodating block, a fastening stop block and a connecting piece, wherein the sample accommodating block is fixed on the bearing plate; one side surface of the sample containing block is sunken into the stopper body to form a sample containing space, the containing space penetrates through the top surface and the bottom surface of the stopper body, and two side surfaces, matched with the sample, in the sample containing block and the bottom surface of the sample containing block form an acute angle; the fastening stop block is fixed with the sample containing block through the connecting piece, and the sample is fixed.
Description
Technical Field
The utility model relates to the field of rock mechanics, in particular to a fastenable tension-compression shear test box and a test system comprising the same.
Background
At present, a compression shear test is a common means for testing the mechanical properties of rocks, but the compression shear test can only test the shear strength of the rocks under pressure, and cannot measure the shear characteristics of the rocks when the rocks are pulled. Therefore, the shear strength of the rock in a tension and compression state can be obtained only through a tension-compression shear test, so that the strength envelope of the rock under the action of tension and compression is drawn, and rock-soil workers can more comprehensively master the mechanical property of the rock.
However, in the process of the tension-compression shear test, particularly, the rock test piece is difficult to fix when tension is applied, and the rock can deflect due to a gap between the rock test piece and the shear box in the shearing process, which is always a problem in the field of rock mechanics. The method commonly adopted at present is to utilize a high-strength adhesive to bond a rock test piece in a shear box, but the method has the following defects in the test process: 1. the bonding process is complicated to operate; 2. the upper and lower surfaces of the rock test piece are difficult to be tightly attached to the shear box; 3. the test piece may fall off due to loose adhesion during the stretching process; 4. the adhesive was difficult to clean after the test was completed.
Disclosure of Invention
Aiming at the problems, the utility model provides a fastenable tension-compression shear test box, which can enable a rock test piece to be tightly attached to the inner wall of a shear box through the conical butt joint of the shear box and the rock test piece and the tightening action of a fastening stop block, ensure that the rock test piece cannot be separated from the shear box when tension is applied, solve the problem that the rock test piece possibly deflects when the shear force is applied, and have the advantages of simple operation in a sample loading process, increased success rate of tension-compression shear tests and improved working efficiency.
In order to realize the purpose, the following technical scheme is adopted:
the utility model discloses a fastenable tension-compression shear test box, which comprises an upper shear test box and a lower shear test box which are arranged up and down symmetrically; the upper shear test box and the lower shear test box have the same structure and respectively comprise a bearing plate, a sample accommodating block, a fastening stop block and a connecting piece, wherein the sample accommodating block is fixed on the bearing plate; one side surface of the sample containing block is sunken into the stopper body to form a sample containing space, the containing space penetrates through the top surface and the bottom surface of the stopper body, and an acute angle is formed between two side surfaces, matched with the sample, in the sample containing block and the bottom surface of the sample containing block; the fastening stop block is fixed with the sample containing block through the connecting piece, and the sample is fixed.
In a second aspect, the utility model also discloses a shear test system which comprises the shear test box.
The utility model has the following beneficial effects:
(1) because the sample holds and is the acute angle between two sides and the bottom surface of sample holding piece of sample complex in the piece, consequently, can guarantee that the rock test piece can not break away from the shear box when pulling force is exerted, rock test piece upper and lower face and shear box closely laminate when pressure is exerted.
(2) Through the clamping effect of the fastening stop block and the bolt, the rock test piece and the shearing box can be free of gaps, and the rock test piece can not deflect when the shearing force is applied.
(3) The process operation of installing the rock test piece in the shearing box is simple, and the rock test piece is dismantled conveniently after the experiment is accomplished, improves experimental success rate and work efficiency greatly.
Drawings
The utility model is further described below with reference to the following figures and examples:
FIG. 1 is a schematic plan view of an upper shear test cell or a lower shear test cell according to the present invention;
FIG. 2 is a schematic perspective view of an upper shear test cell or a lower shear test cell according to the present invention;
FIG. 3 is a schematic cross-sectional view of the assembled sample of the shear box of the present invention.
In the figure, 1, a supporting plate; 2. a sample containing block; 3. a threaded hole; 4. fastening a stop block; 5. and (4) screws.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the utility model as claimed. 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 invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the utility model expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
the utility model provides a fastenable tension-compression shear test box, which is shown in figure 3; the device comprises an upper shear test box and a lower shear test box which are arranged up and down symmetrically; the upper shear test box and the lower shear test box have the same structure, and are schematic structural diagrams of the upper shear test box or the lower shear test box as shown in fig. 1 and fig. 2, each of the upper shear test box and the lower shear test box comprises a bearing plate 1, a sample containing block 2, a fastening stop block 4 and a connecting piece, and the sample containing block 2 is fixed on the bearing plate 1; one side surface of the sample containing block 2 is sunken into the stopper body to form a sample containing space, the containing space penetrates through the top surface and the bottom surface of the stopper body, and an acute angle is formed between two side surfaces, matched with the sample, in the sample containing block 2 and the bottom surface of the sample containing block; the fastening stop block is fixed with the sample containing block through the connecting piece, and the sample is fixed.
As a further technical scheme, a threaded hole is formed in the side face of the sample containing block, and a through hole is also formed in the fastening stop block; the screw 5 passes through the through hole on the fastening stop block to be matched with the threaded hole.
As a further technical solution, in this embodiment, the supporting plate 1 and the sample containing block 2 are detachably connected through a connecting member, or are integrally formed, preferably, detachably connected.
As a further technical solution, in this embodiment, a threaded hole is formed in a side surface of the sample containing block 2, and a through hole is also formed in the fastening stopper 4; the screw 5 passes through the through hole on the fastening stop block 4 to be matched with the threaded hole.
As a further technical solution, in this embodiment, the supporting plate is a rectangular plate, the sample accommodating block 2 is a rectangular block, one side surface of the rectangular block is recessed into the rectangular block to form an accommodating space for the sample, the accommodating space penetrates through the top surface and the bottom surface of the rectangular block, and an acute angle is formed between two opposite side surfaces of the sample accommodating block 2, which are matched with the sample, and the bottom surface of the sample accommodating block, in this embodiment, the two acute angles are equal. And the angle of the acute angle is equal to the included angle between the side surface and the bottom surface of the sample, so that the sample can be smoothly inserted into the rectangular block.
The specific method comprises the following steps:
before the tension-compression shear test, two sides of a rock test piece are machined to be conical, an upper shear test box and a lower shear test box are needed in the test process, the structures of the shear test boxes are completely the same, the lower end of the conical rock test piece is firstly pushed into the lower shear test box along the sample containing block 2, then the fastening stop block is connected to the sample containing block 2 through a bolt, and the fastening stop block is tightly attached to the rock test piece through the fastening effect of the bolt so as to fasten the rock test piece in the lower shear test box. In the same way, the upper end of the rock specimen was also mounted in the upper shear box, and the effect after mounting was as shown in fig. 3.
In the test process, after the tensile force is exerted, the rock test piece can be ensured not to be separated from the shear box due to the conical fit of the shear box and the rock test piece. After the tangential force is applied, no gap exists between the rock test piece and the shear box due to the clamping effect of the fastening stop block, so that the rock test piece cannot deflect due to the eccentric effect of the tangential force. Therefore, the fastenable tension-compression shear test box provided by the utility model can ensure that the rock tension-compression shear test is successfully completed.
Further, the present embodiment also provides a shear test system, which includes the shear test box, the tangential force applying device, and the normal tension pressure applying device described above.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A shear test box comprises an upper shear test box and a lower shear test box which are arranged in an up-and-down symmetrical manner; the upper shear test box and the lower shear test box have the same structure and are characterized by respectively comprising a bearing plate, a sample accommodating block, a fastening stop block and a connecting piece, wherein the sample accommodating block is fixed on the bearing plate; one side surface of the sample containing block is sunken into the stopper body to form a sample containing space, the containing space penetrates through the top surface and the bottom surface of the stopper body, and an acute angle is formed between two side surfaces, matched with the sample, in the sample containing block and the bottom surface of the sample containing block; the fastening stop block is fixed with the sample containing block through the connecting piece, and the sample is fixed.
2. The shear test kit of claim 1, wherein the sample receiving block has a threaded hole in a side thereof, and the fastening block has a through hole therein; the screw passes through the through hole on the fastening stop block to be matched with the threaded hole.
3. The shear test cassette of claim 1, wherein said support plate and said sample receiving block are removably connected by a connector.
4. The shear test cassette of claim 1, wherein said support plate and said sample receiving block are integrally formed.
5. The shear test cassette of claim 1, wherein the support plate is a rectangular plate.
6. The shear test cassette of claim 1, wherein the acute angle is equal to the angle between the side and bottom surfaces of the test specimen.
7. A shear test system comprising the shear test cartridge of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121419727.5U CN215492911U (en) | 2021-06-24 | 2021-06-24 | Shear test box and test system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121419727.5U CN215492911U (en) | 2021-06-24 | 2021-06-24 | Shear test box and test system comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215492911U true CN215492911U (en) | 2022-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121419727.5U Expired - Fee Related CN215492911U (en) | 2021-06-24 | 2021-06-24 | Shear test box and test system comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215492911U (en) |
-
2021
- 2021-06-24 CN CN202121419727.5U patent/CN215492911U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220111 |