CN212340862U - Rock sample confining pressure application test device - Google Patents
Rock sample confining pressure application test device Download PDFInfo
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- CN212340862U CN212340862U CN202021752082.2U CN202021752082U CN212340862U CN 212340862 U CN212340862 U CN 212340862U CN 202021752082 U CN202021752082 U CN 202021752082U CN 212340862 U CN212340862 U CN 212340862U
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Abstract
The utility model discloses a rock sample confining pressure applying test device, which adopts high-strength carbon fiber cloth to wrap a rock sample, and applies confining pressure to the rock sample by pulling the high-strength carbon fiber cloth, so that the rock sample is confined to reach a tension force preset value; and loading axial pressure on the rock sample subjected to confining pressure at a certain speed, so that the rock sample is damaged under the condition that the confined pressure prestress value is constant. By adopting the designed rock sample confining pressure applying test device and applying confining pressure to the rock sample by utilizing the prestressed high-strength carbon fiber cloth, the damage to test personnel caused by instantaneous ejection of rock blocks when high-strength hard rock is damaged under pressure can be avoided, and the change of the water content of the rock sample in the test process can be reduced; the test result can be accurately obtained. The method is suitable for triaxial compression test of hard rock.
Description
Technical Field
The utility model relates to a rock mechanics tests technical field, concretely relates to novel rock sample confined pressure is exerted test device and test method.
Background
In the field of geotechnical engineering, rock mechanics tests are the basis for carrying out related scientific research works. In the rock mechanical test, various rock mechanical testing machines are required, wherein the conventional rock triaxial tester is expensive, and the conventional triaxial compression tester is complex in equipment and difficult to operate. In addition, instantaneous ejection of rock masses when high-strength hard rocks are damaged under pressure in the process of adopting a conventional triaxial tester injures testers; in the test process of researching the influence of the water content on the mechanical property of the rock, the change of the water content of the rock sample cannot obtain a more accurate test result, so that the test effect is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide a rock sample confining pressure applying test device, which adopts prestressed high-strength carbon fiber cloth to wind a rock sample, and connects an air pump air compressor to apply confining pressure and axial pressure to the rock sample through a pneumatic tensioner, so that the damage to test personnel caused by instantaneous ejection of rock blocks when high-strength hard rock is damaged by pressure can be avoided, and the change of the water content of the rock sample in the test process can be reduced; the test result can be accurately obtained, and the rock triaxial compression test of the rock sample by using the rock uniaxial testing machine is realized.
The utility model discloses a realize through following technical scheme.
The utility model provides a rock sample confining pressure applying test device, which comprises a rock sample confining pressure device, a pneumatic tensioner, an air pump air compressor and a computer; the rock sample confining pressure device is characterized in that a rock sample is wrapped by high-strength carbon fiber cloth of the rock sample confining pressure device, the high-strength carbon fiber cloth is connected with a pneumatic tensioner, the pneumatic tensioner is connected with an air pump air compressor, and a computer is respectively connected with the rock sample confining pressure device and the pneumatic tensioner.
As the utility model discloses preferred technical scheme, rock sample confining pressure device includes base, upper and lower column steel seat, seal cover, high strength carbon cloth and from locking-type ground tackle, down the column steel seat be fixed in on the base, through connecting the column steel seat from locking-type ground tackle coaxial coupling.
As the utility model discloses preferred technical scheme, include rubber seal cover, high strength carbon fiber cloth and a pair of shaft-like anchor head from locking-type ground tackle, the rubber seal cover overlaps respectively on last column steel stand, rock sample and lower column steel stand, and the rubber seal cover of the carbon fiber cloth parcel rock sample periphery that excels in is connected to pneumatic strainer.
As the utility model discloses preferred technical scheme, on high strength carbon cloth parcel rock sample passed the gap one end between the self-locking type ground tackle was fixed in the high strength carbon cloth periphery, the other end was connected to pneumatic strainer.
As the utility model discloses preferred technical scheme, shaft-like anchor head both ends cross-section is the square, and the cross-section of middle part pole is circular, and the height of rock sample is good at to the length of anchor head middle part pole.
As the utility model discloses preferred technical scheme, the central axis coincidence of upper and lower column steel seat and rock sample.
As the utility model discloses preferred technical scheme, the survey preforming that is connected to the computer is pasted to rock sample lateral surface.
The utility model discloses owing to take above technical scheme, it has following beneficial effect:
the utility model utilizes the advantages of high-strength carbon fiber cloth with light weight, high tensile strength, high elastic modulus and the like, and adopts the prestressed high-strength carbon fiber cloth to apply confining pressure on the rock sample, and loads axial pressure on the rock sample after the confining pressure at the speed of 0.002mm/s, thereby not causing the ejection of rock blocks when the high-strength hard rock is damaged under pressure and not damaging the high-strength carbon fiber cloth wrapping the rock sample; the device can also be used for rock uniaxial compression tests, and due to the wrapping of the carbon fiber cloth, the damage to testing personnel caused by instantaneous ejection of rock blocks when high-strength hard rocks are damaged under pressure is avoided; in the process of researching the influence of the water content on the mechanical property of the rock, the device can reduce the change of the water content of the rock sample in the test process; the test device has strong practicability and wide application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, do not constitute a limitation of the invention, and in which:
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic view of the self-locking anchorage device of the present invention.
The method comprises the following steps of 1-a rock sample, 2-an upper cylindrical steel base, 3-a lower cylindrical steel base, 4-a base, 5-a pressure measuring sheet, 6-a computer, 7-a rubber sealing sleeve, 8-high-strength carbon fiber cloth, 9-a first anchor head, 10-a second anchor head, 11-a first bolt, 12-a second bolt, 13-a pneumatic tensioner, 14-a meter air pipe and 15-an air pump.
Detailed Description
The invention will be described in detail with reference to the drawings and specific embodiments, wherein the exemplary embodiments and descriptions are provided to explain the invention, but not to limit the invention.
Referring to the attached drawing 1, the embodiment of the utility model provides a rock sample confining pressure applying test device, which comprises a rock sample confining pressure device, a pneumatic tensioner 13, an air pump air compressor 15 and a computer 6; rock sample confining pressure device's 8 parcel rock samples 1 of high strength carbon cloth, pneumatic strainer 13 is connected to 8 connection of high strength carbon cloth, pneumatic strainer 13 is connected with air pump air compressor machine 15 through rice tuber pipe 14, pneumatic strainer 13 is connected with computer 6 to controlled by computer 6, control pneumatic strainer 13 implements the confining pressure to parcel rock sample 1 high strength carbon cloth 8, pneumatic strainer 13 has tightens up and relaxs the function, can maintain the prestressing force on the 8 carbon cloth that excels in at the test process unchangeable. The lateral surface of the rock sample is attached with the pressure measuring sheet 5 in the rock sample confining pressure device, and the computer 6 is connected with the pressure measuring sheet 5 and used for reading confining pressure of the rock sample, monitoring the confining pressure of the rock sample in real time in the sample loading process and acquiring the confining pressure condition of the rock sample.
As shown in fig. 2, the rock sample confining pressure device comprises a rock sample 1, an upper cylindrical steel seat 2, a lower cylindrical steel seat 3, a base 4 and a self-locking anchorage device, wherein the self-locking anchorage device comprises a rubber sealing sleeve 7, high-strength carbon fiber cloth 8, a first anchor head 9, a second anchor head 10, a first bolt 11 and a second bolt 12, the upper cylindrical steel seat 2, the rock sample 1 and the lower cylindrical steel seat 3 are coaxially arranged on the base 4 from top to bottom in sequence, and the rock sample is respectively arranged between the upper cylindrical steel seat 2 and the lower cylindrical steel seat 3 through the self-locking anchorage device. Rubber seal cover 7 overlaps respectively on last column steel seat 2, rock sample 1 and lower column steel seat 3, and the rubber seal cover 7 of high strength carbon cloth 8 parcel rock sample 1 periphery passes the gap between the first anchor head 9 of self-locking ground tackle, the second anchor head 10, and one end is fixed in on the high strength carbon cloth periphery, and the other end is connected to pneumatic strainer.
Go up cylindrical steel seat 2, cylindrical steel seat 3 all coincides with rock sample 1's the central axis down, and rock sample 1 is the cylinder structure, and vertical the placing is on base 4, and the up end of rock sample 1 is parallel with lower terminal surface, goes up cylindrical steel seat 2 and cylindrical steel seat 3 down and is the cylinder structure and the diameter is the same with rock sample 1's diameter, and goes up cylindrical steel seat 2 and cylindrical steel seat 3 down and is the rigidity material.
The cross sections of the two ends of the first anchor head 9 and the second anchor head 10 are square, the cross section of the middle part of the first anchor head is circular, the length of the circular cross section part of the anchor head is longer than that of the rock sample, and the gravity center position of the anchor head and the gravity center position of the rock sample are on the same horizontal plane. The tensile strength of the high-strength carbon fiber cloth 8 can reach thousands of megapascals, and the width of the high-strength carbon fiber cloth is the same as the length of the circular section part of the anchor head.
The working method of the rock sample confining pressure application test device of the embodiment comprises the following steps:
three test pieces 5 are attached to the middle of the rock sample 1 at appropriate positions.
The rock sample 1 is nested into the rubber sealing sleeve 7, so that the outer side wall of the rock sample 1 is attached to the rubber sealing sleeve 7, the upper cylindrical steel seat 2 and the lower cylindrical steel seat 3 are vertically placed at the upper end and the lower end of the rock sample 1 respectively and are tightly attached to the upper end face and the lower end face of the rock sample, and the rubber sealing sleeves 7 which are arranged at the upper end and the lower end of the rock sample 1 are tightly attached to the outer side walls of the upper cylindrical steel seat 2 and the lower cylindrical steel seat 3 respectively.
Cutting the high-strength carbon fiber cloth 8 into a proper length, turning and wrapping the first anchor head 9 by the high-strength carbon fiber cloth at one end, overlapping the extending part with the lower-layer carbon fiber, brushing glue on the overlapped part to soak the glue, winding the fiber cloth around the rock sample 1 for a circle after the glue is solidified, and winding the fiber cloth around the second anchor head 10, penetrating the extending part of the high-strength carbon fiber cloth through a belt penetrating port of a pneumatic tensioner 13, and anchoring the first anchor head 9 and the second anchor head 10 by using a first bolt 11 and a second bolt 12; the pneumatic tensioner 13 is activated by the computer 6 and stops tensioning when the confining pressure to which the rock sample is subjected reaches a predetermined value.
And (3) putting the obtained rock sample 1 on a rock uniaxial compressor, loading axial pressure at a certain speed of 0.002mm/s until the rock sample 1 is damaged, and keeping the pneumatic tensioner 13 in a working state in the loading process to maintain the prestress value of the high-strength carbon fiber cloth 8 so as to ensure that the confining pressure on the rock sample 1 is constant.
And the computer acquires the confining pressure and the axial pressure of the rock sample to obtain an accurate test result.
The high-strength carbon fiber cloth adopted by the utility model can be CDHJ-I-200, the tensile strength of the high-strength carbon fiber cloth is up to 3556MPa, and the elastic modulus is up to 2.41 multiplied by 105MPa. The adoption of the high-strength carbon fiber cloth with prestress to apply confining pressure to the rock sample can avoid the damage of instantaneous ejection of rock blocks to testers when high-strength hard rock is damaged under pressure, and can reduce the rock sample content in the test processA change in water rate; the test result can be accurately obtained.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (7)
1. A rock sample confining pressure applying test device is characterized by comprising a rock sample confining pressure device, a pneumatic tensioner, an air pump air compressor and a computer; the rock sample confining pressure device is characterized in that a rock sample is wrapped by high-strength carbon fiber cloth of the rock sample confining pressure device, the high-strength carbon fiber cloth is connected with a pneumatic tensioner, the pneumatic tensioner is connected with an air pump air compressor, and a computer is respectively connected with the rock sample confining pressure device and the pneumatic tensioner.
2. The rock sample confining pressure application test device according to claim 1, characterized in that the rock sample confining pressure device comprises a base, an upper cylindrical steel seat, a lower cylindrical steel seat, a sealing sleeve, high-strength carbon fiber cloth and a self-locking anchorage, wherein the lower cylindrical steel seat is fixed on the base and is coaxially connected with the upper cylindrical steel seat through the self-locking anchorage.
3. The rock sample confining pressure application test device according to claim 2, wherein the self-locking anchorage device comprises a rubber sealing sleeve, high-strength carbon fiber cloth and a pair of rod-shaped anchor heads, the rubber sealing sleeves are respectively sleeved on the upper cylindrical steel seat, the rock sample and the lower cylindrical steel seat, and the high-strength carbon fiber cloth wraps the rubber sealing sleeve on the periphery of the rock sample and is connected to the pneumatic tensioner.
4. The rock sample confining pressure application test device according to claim 3, wherein one end of the high-strength carbon fiber cloth wrapping the rock sample penetrates through the gap between the self-locking anchors and is fixed on the periphery of the high-strength carbon fiber cloth, and the other end of the high-strength carbon fiber cloth is connected to the pneumatic tensioner.
5. The confining pressure application test device for rock samples as claimed in claim 3, wherein the cross-section of the two ends of the rod-shaped anchor head is square, the cross-section of the middle rod is round, and the length of the middle rod of the anchor head is longer than the height of the rock sample.
6. The rock sample confining pressure application test device according to claim 3, wherein the upper and lower cylindrical steel seats are coincident with a central axis of the rock sample.
7. The rock sample confining pressure application test device according to any one of claims 1-6, wherein a pressure piece connected to a computer is attached to the outer side of the rock sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021752082.2U CN212340862U (en) | 2020-08-20 | 2020-08-20 | Rock sample confining pressure application test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021752082.2U CN212340862U (en) | 2020-08-20 | 2020-08-20 | Rock sample confining pressure application test device |
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| CN212340862U true CN212340862U (en) | 2021-01-12 |
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| CN202021752082.2U Active CN212340862U (en) | 2020-08-20 | 2020-08-20 | Rock sample confining pressure application test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855428A (en) * | 2020-08-20 | 2020-10-30 | 西安建筑科技大学 | Rock sample confining pressure application test device and test method |
| CN113776769A (en) * | 2021-09-28 | 2021-12-10 | 重庆三峡学院 | Hammering testing machine for generating rock accumulated damage |
-
2020
- 2020-08-20 CN CN202021752082.2U patent/CN212340862U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855428A (en) * | 2020-08-20 | 2020-10-30 | 西安建筑科技大学 | Rock sample confining pressure application test device and test method |
| CN111855428B (en) * | 2020-08-20 | 2024-06-25 | 西安建筑科技大学 | Rock sample confining pressure application test device and test method |
| CN113776769A (en) * | 2021-09-28 | 2021-12-10 | 重庆三峡学院 | Hammering testing machine for generating rock accumulated damage |
| CN113776769B (en) * | 2021-09-28 | 2023-06-06 | 重庆三峡学院 | Hammer testing machine capable of generating rock accumulated damage |
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