CN216695847U - Rock anisotropy tensile strength testing device - Google Patents
Rock anisotropy tensile strength testing device Download PDFInfo
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- CN216695847U CN216695847U CN202122876784.2U CN202122876784U CN216695847U CN 216695847 U CN216695847 U CN 216695847U CN 202122876784 U CN202122876784 U CN 202122876784U CN 216695847 U CN216695847 U CN 216695847U
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- 239000011435 rock Substances 0.000 title claims abstract description 63
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229940099259 vaseline Drugs 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model discloses a rock anisotropic tensile strength testing device, which is arranged on a universal testing machine, wherein a pressure box is arranged on a workbench of the universal testing machine, a dowel bar is arranged on a cross beam, and a mounting hole capable of transversely placing a rock sample is formed in the pressure box; the dowel bar can apply pressure to the pressure box, the workbench is also provided with an annular dial, and the axis of the annular dial is superposed with the axis of a rock sample placed in the pressure box; the device can realize Brazilian splitting loading of natural rock masses in different directions, and can carry out the test of testing the anisotropic tensile strength of the rock masses in actual engineering, thereby knowing the mechanical property of rock tension failure and providing a test foundation for engineering construction and design.
Description
Technical Field
The utility model relates to the field of rock tensile strength testing, in particular to a rock anisotropic tensile strength testing device.
Background
In actual engineering, the natural rock has obvious anisotropic characteristics due to the fact that structural surfaces, microcracks, microporosity and the like are randomly distributed in the natural rock under the action of a geological structure; in the engineering, most rocks are in a tension-compression stress state, the tension failure mode is common, and particularly after the rocks are excavated and unloaded, rock blocks are peeled off from two sides of a chamber. Therefore, the acquisition of the tensile strength index of the rock has very important significance on actual engineering construction and design. At present, the indoor rock Brazilian splitting test is a test method for indirectly acquiring the tensile mechanical strength of the rock. The anisotropic characteristics of the natural rock mass are considered, the tensile strength parameters of the rock in different directions are accurately obtained, and the tensile failure mechanism of the rock can be deeply understood and known. Therefore, the research on the mechanical test of the anisotropic tensile strength of the rock has not only theoretical significance, but also great engineering practical significance.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical defects, the utility model aims to provide a rock anisotropic tensile strength testing device which can be used for carrying out mechanical test research on the anisotropic tensile strength of a rock sample.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a rock anisotropic tensile strength testing device which is arranged on a universal testing machine, wherein the bottom of the universal testing machine is provided with a workbench, and a cross beam of the universal testing machine is provided with a dowel bar.
Preferably, the face, close to the rock sample, of the upper pressure block and the face, close to the rock sample, of the lower pressure block are provided with grooves into which the rock sample can be inserted.
Preferably, the scale range displayed on the annular scale is at least 0-180 °.
Preferably, the face of the cutting edge contacting the rock sample is provided with a notch with the same curvature as the rock sample.
The utility model has the beneficial effects that: according to the utility model, the annular dial is arranged on the universal testing machine, Brazilian splitting loading of natural rock mass in different directions can be realized, and a rock mass anisotropic tensile strength test in actual engineering can be carried out, so that the mechanical property of rock tensile failure can be known, and a test foundation is provided for engineering construction and design.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a rock anisotropic tensile strength testing device provided by an embodiment of the utility model;
FIG. 2 is an angular distribution pattern on the annular dial provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pressure cell and a cutting edge according to an embodiment of the present invention.
Description of reference numerals:
1. a universal experiment machine; 2. a dowel bar; 3. an annular dial; 4. a pressure cell; 41. an upper pressure block; 42. a lower pressure block; 5. a rock sample; 6. a work table; 7. a bolt; 8. and (7) cutting edges.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1 to 3, a rock anisotropic tensile strength testing device is arranged on a universal tester 1, a workbench 6 is arranged at the bottom of the universal tester 1, a dowel bar 2 is arranged on a cross beam of the universal tester 1, a pressure cell 4 is arranged on the workbench 6, and a mounting hole capable of transversely placing a rock sample 5 is formed in the pressure cell 4; the pressure box is made of No. 45 steel, and the elastic modulus of the pressure box is 210 Gpa;
the pressure box 4 comprises an upper pressure block 41 and a lower pressure block 42 which are matched with each other and fixedly connected together through a bolt 7; the bottom of the lower pressure block 42 is fixed on the workbench 6, and the top of the upper pressure block 41 is fixedly connected with the output end of the dowel bar 2; and the workbench 6 is also provided with an annular dial 3, and the axis of the annular dial 3 is superposed with the axis of the rock sample 5 placed in the pressure box 4.
The pressure box 4 is a square box body, and grooves consistent with the surface curvature of the rock sample 5 are formed in the upper pressure block 41 and the lower pressure block 42.
The lower extreme is equipped with the blade 8 that is used for compressing tightly rock sample 5 on the inner wall of mounting hole in the pressure cell 4, realizes blade 8 and rock sample 5's seamless, realizes radial loading, prevents eccentric loading.
Vaseline for reducing friction force between the contact surface of the rock sample 5 and the mounting hole is coated on the cutting edge 8.
The scale range displayed on the annular scale disk 3 is at least 0-180 deg.
The using method of the device comprises the following steps:
s1, selecting a natural rock sample 5 according to experimental requirements, making the rock sample 5 into a cylindrical sample with the diameter of 50mm and the height of 25mm, polishing two ends of the cylindrical sample smoothly, reducing the end effect, and marking the tendency of the rock sample 5 under actual engineering conditions by adopting an X-Y coordinate system;
s2, placing the rock sample 5 in a mounting hole in the pressure box 4, corresponding to the upper cutting edge 8 and the lower cutting edge 8, and controlling the distance between the upper pressure block 41 and the lower pressure block 42 by using the bolt 7 to enable the mounting hole to be matched with the rock sample 5;
s3, rotating the rock sample 5 to make the inclination of the rock sample identical to the inclination marked in the step S1;
s4, screwing out the bolt 7 after setting the angle, pressing the pressure cell 4 and the rock sample 5 in the pressure cell by using the dowel bar 2, and starting a Brazilian splitting test by loading and controlling the universal testing machine 1;
s5, the reference ring is turned to the dial 3 to continue to rotate the rock sample 5 to 0 °, 18 °, 36 °, 54 °, 72 °, 90 °, 108 °, 126 °, 154 ° and 172 °, and then the step S4 is repeated to study the anisotropic tensile strength of the natural rock sample 5.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The utility model provides a rock anisotropy tensile strength testing arrangement, sets up on universal tester (1), the bottom of universal tester (1) is equipped with workstation (6), be equipped with dowel steel (2) on the crossbeam of universal tester (1), its characterized in that, workstation (6) are equipped with down force piece (42), pressure piece (41) are established to dowel steel (2) output, the middle part of going up pressure piece (41), down force piece (42) terminal surface in opposite directions is equipped with blade (8) that are used for compressing tightly rock specimen (5), still be equipped with annular calibrated scale (3) on workstation (6), the axis of annular calibrated scale (3) and the coincidence of the axis of rock specimen (5), scribble on blade (8) and be used for reducing the vaseline of frictional force between rock specimen (5) and mounting hole contact surface.
2. The device for testing the anisotropic tensile strength of the rock according to claim 1, wherein the surfaces of the upper pressure block (41) and the lower pressure block (42) close to the rock sample (5) are provided with grooves into which the rock sample (5) can be inserted.
3. A rock anisotropic tensile strength testing device according to claim 1, wherein the scale range displayed on the annular scale (3) is at least 0-180 °.
4. The device for testing the anisotropic tensile strength of the rock according to claim 1, wherein the face of the cutting edge (8) contacting the rock specimen (5) is provided with a notch having the same curvature as that of the rock specimen (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122876784.2U CN216695847U (en) | 2021-11-23 | 2021-11-23 | Rock anisotropy tensile strength testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122876784.2U CN216695847U (en) | 2021-11-23 | 2021-11-23 | Rock anisotropy tensile strength testing device |
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| Publication Number | Publication Date |
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| CN216695847U true CN216695847U (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122876784.2U Active CN216695847U (en) | 2021-11-23 | 2021-11-23 | Rock anisotropy tensile strength testing device |
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| CN (1) | CN216695847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115165565A (en) * | 2022-07-01 | 2022-10-11 | 中国地质科学院地质力学研究所 | Method for evaluating value range of tensile strength of rock by using rock core deformation method |
-
2021
- 2021-11-23 CN CN202122876784.2U patent/CN216695847U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115165565A (en) * | 2022-07-01 | 2022-10-11 | 中国地质科学院地质力学研究所 | Method for evaluating value range of tensile strength of rock by using rock core deformation method |
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