CN112213190A - Expandable deformation micro-friction resistance circular loading plate - Google Patents
Expandable deformation micro-friction resistance circular loading plate Download PDFInfo
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- CN112213190A CN112213190A CN202011138737.1A CN202011138737A CN112213190A CN 112213190 A CN112213190 A CN 112213190A CN 202011138737 A CN202011138737 A CN 202011138737A CN 112213190 A CN112213190 A CN 112213190A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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Abstract
The invention provides an expandable deformation micro-friction resistance circular loading plate which comprises a circular loading plate base and a circular assembling slide block device, wherein the circular assembling slide block device comprises six same fan-shaped assembling slide block units, and comprises a first slide block, a second slide block and a third slide block, and the first slide block, the second slide block and the third slide block respectively comprise a slide block bottom plate, a magnet, a supporting bearing, a slide block top plate and a plurality of bull eye bearings; the top plate of the sliding block is contacted with a sample to be tested, can freely move and rotate on the loading plate base within a certain range through the bull eye bearing, and can freely rotate on the loading plate base through the supporting bearing so as to adapt to the deformation of the end face of the sample to be tested on the loading plate surface, reduce the frictional resistance between the circular rigid loading plate and the sample, truly simulate the mechanical response of a soil body sample, reduce the difficulty of test operation, reduce the using amount of the test sample and save the test expenditure; the invention has the advantages of novel design, simple structure, convenient operation, good effect, strong practicability and wide applicability.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering test and test, and particularly relates to an expandable deformable micro-friction resistance circular loading plate.
Background
In geotechnical engineering, a triaxial test method is generally adopted to obtain mechanical characteristics of a soil body, the triaxial test simulates mechanical response of a cylindrical soil body sample in an axisymmetric stress state, axial stress of the soil body is generally applied by a circular rigid loading plate to increase main stress, the real mechanical characteristics of the soil body are influenced due to the large frictional resistance between the circular rigid loading plate and a loading end face of the cylindrical sample, and in order to obtain a test result which is closer to the real mechanical characteristics, people find that an acceptable test result can be obtained only when the ratio of the height to the diameter of the cylindrical sample is not less than 2 through a large amount of researches, so that the difficulty and the test expenditure of the test can be increased. However, even if a cylindrical sample with the height-diameter ratio equal to 2 is adopted, the frictional resistance between the circular rigid loading plate and the sample loading surface still has great influence on the mechanical properties of the soil sample, and the most obvious result is that the radial deformation of the middle part of the sample is far greater than that of the end part due to the end part constraint effect, so that the soil is in a drum-shaped damage form during the soil damage, and the method is not reasonable and economical. Therefore, it is necessary to reduce the frictional resistance between the circular loading plate and the sample loading end face, so that the triaxial test can more reasonably reflect the real mechanical properties of the soil body, simplify the difficulty of operating the triaxial test, and save the running expense of the triaxial test. Based on the above, the present invention provides an expansible deformation micro-friction resistance circular loading plate to solve the above problems.
Disclosure of Invention
The invention aims to provide an expandable deformation micro-friction resistance circular loading plate which can flexibly adapt to radial deformation of an end face of a sample and has small friction resistance with the end face of the sample.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an expandable deformation micro-friction resistance circular loading plate comprises a circular loading plate base and a circular assembling slide block device, wherein the circular loading plate base is magnetic, the circular assembling slide block device can be adsorbed on the circular loading plate base, the circular assembling slide block device comprises a plurality of sub-slide blocks, and each sub-slide block is adsorbed on the circular loading plate base and can move on the loading plate base; the circular assembling slide block device is in contact with a sample to be tested and can adapt to the deformation of the end face of the sample to be tested on a loading plate surface.
Furthermore, the circular assembling sliding block device comprises six identical concentric sector assembling sliding block units, and each concentric sector assembling sliding block unit comprises a first sliding block, two second sliding blocks and three third sliding blocks; the first sliding block is fan-shaped, and the central angle is 60 degrees; the second sliding block is in a sector ring shape, has a central angle of 30 degrees and is positioned on the outer side of the first sliding block; the third sliding block is in a sector ring shape, the central angle is 20 degrees, and the third sliding block is positioned on the outer side of the second sliding block.
Furthermore, the first sliding block, the second sliding block and the third sliding block respectively comprise a sliding block bottom plate, a magnet, a supporting bearing, a sliding block top plate and a plurality of bull eye bearings; the magnet is fixed on the lower surface of the sliding block bottom plate, and the bull eye bearing is arranged at the bottom of the sliding block bottom plate; the lower edge of the magnet is higher than the lower edge of the bull eye bearing; the first sliding block, the second sliding block and the third sliding block are adsorbed on the loading plate base through the attraction force between the magnet and the magnetic circular loading plate base and can freely move and rotate on the circular loading plate base through the bull eye bearing; the supporting bearing is arranged on the upper surface of the sliding block bottom plate, the sliding block top plate is arranged on the supporting bearing, and the sliding block top plate can freely rotate relative to the sliding block bottom plate under the action of the supporting bearing.
Furthermore, the lengths of the sliding block top plates of the first sliding block, the second sliding block and the third sliding block at the side edges of the circular assembling sliding block device in the radius direction are equal.
Furthermore, the circular assembling slide block device further comprises a limiting stop strip, wherein the limiting stop strip is fixedly arranged on the circular loading plate base and is positioned on the outer side of the circular assembling slide block device so as to limit the circular assembling slide block device.
Furthermore, the edge of the round loading plate base is provided with a plurality of counter bores, and the limiting stop bars are fixed on the edge of the loading plate base through counter bores.
Furthermore, the limiting stop strips are circular and made of high-strength non-deformable metal materials; the outer edge of the limiting stop strip is aligned with the outer edge of the circular loading plate base; the top surface of the limiting stop strip is lower than the top surface of the top plate of the sliding block.
Furthermore, a loading plate drain hole and a valve are also arranged on the loading plate base, and the loading plate drain hole is positioned on the inner side of the limiting barrier strip; and the valve is detachably fixed in the drainage hole of the loading plate through the threads.
Furthermore, the circular loading plate base is made of a high-strength non-deforming magnetic metal material; the contact surface of the circular loading plate base and the circular assembling sliding block device adopts a high-polishing plane design.
Furthermore, the sliding block bottom plate, the bull eye bearing, the supporting bearing and the sliding block top plate are all made of light high-strength metal materials.
The invention has the beneficial effects that:
(1) the base of the loading plate and the circular assembling sliding block device are magnetically adsorbed to form the expandable deformation micro-friction resistance circular loading plate, and sliding block top plates of a first sliding block, a second sliding block and a third sliding block in the circular assembling sliding block device are contacted with a sample to be tested; the first sliding block, the second sliding block and the third sliding block can freely move and rotate in a certain range on the circular loading plate base through the bull eye bearing, and freely rotate on the circular loading plate base through the supporting bearing so as to adapt to the deformation of the end face of the sample to be tested on the loading plate surface;
(2) the high-polishing loading plate base, the high-precision bull eye bearing and the supporting bearing are adopted to ensure that the loading plate can generate follow-up radial deformation along with the deformation of the test end face, so that the frictional resistance between the circular rigid loading plate and the test sample is greatly reduced or eliminated, the mechanical response of the soil sample can be truly and reasonably simulated, the height-diameter ratio of the triaxial cylindrical test sample can be further reduced, the difficulty of test operation is reduced, the use amount of the test sample is reduced, and the test expenditure is saved; the invention has the advantages of novel design, simple structure, convenient operation, good effect, strong practicability and wide applicability.
Description of the drawings:
FIG. 1 is a top view of an embodiment of an expansible deformable micro-friction circular load plate according to the present invention;
FIG. 2 is a cross-sectional view of an embodiment of an expansible deformable micro-friction circular load plate according to the present invention;
FIG. 3 is a general side view of a first slider, a second slider, and a third slider in accordance with an embodiment of the present invention;
the labels in the figures are: 1. a load plate base; 2. a limiting stop strip; 3. a counter bore; 4. countersunk head screws; 5. a first slider; 6. a second slider; 7. a third slider; 8. a slider bottom plate; 9. a bull's eye bearing; 10. a magnet; 11. a support bearing; 12. a slider top plate; 13. a loading plate drain hole; 14. a load plate valve; 15. and the concentric sector-shaped assembled sliding block units.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1 to 3, an embodiment of the present invention provides an expandable deformable micro-friction resistance circular load plate, including a circular load plate base 1 and a circular assembled slider device, where the circular load plate base 1 has magnetism, the circular assembled slider device may be adsorbed on the circular load plate base 1, the circular assembled slider device includes a plurality of sub-sliders, and each sub-slider is adsorbed on the circular load plate base 1 and may move on the load plate base 1; the circular assembling slide block device is in contact with a sample to be tested and can adapt to the deformation of the end face of the sample to be tested on a loading plate surface.
In the embodiment of the invention, the circular assembling sliding block device comprises six identical concentric sector assembling sliding block units 15, wherein each concentric sector assembling sliding block unit 15 comprises a first sliding block 5, two second sliding blocks 6 and three third sliding blocks 7; the first sliding block 5 is fan-shaped, and the central angle is 60 degrees; the second sliding block 6 is in a fan-shaped ring shape, has a central angle of 30 degrees and is positioned on the outer side of the first sliding block 5; the third sliding block 7 is in a sector ring shape, has a central angle of 20 degrees and is positioned on the outer side of the second sliding block 6.
In the embodiment of the invention, each of the first slider 5, the second slider 6 and the third slider 7 comprises a slider bottom plate 8, a magnet 10, a support bearing 11, a slider top plate 12 and a plurality of bull-eye bearings 9; the magnet 10 is fixed on the lower surface of the sliding block bottom plate 8, the eyelet bearings 9 are arranged at the bottom of the sliding block bottom plate 8, and one eyelet bearing 9 is arranged on the inner side of each corner position at the bottom of the sliding block bottom plate 8; the lower edge of the magnet 10 is higher than the lower edge of the bull eye bearing 9; the first sliding block 5, the second sliding block 6 and the third sliding block 7 are adsorbed on the loading plate base 1 through the attraction force between the magnet 10 and the magnetic circular loading plate base 1, and freely move and rotate on the circular loading plate base 1 through the bull eye bearing 9; the supporting bearing 11 is arranged on the upper surface of the sliding block bottom plate 8, the sliding block top plate 12 is arranged on the supporting bearing 11, and the sliding block top plate 12 can freely rotate relative to the sliding block bottom plate 8 under the action of the supporting bearing 11; in this embodiment, the lengths of the top plates 12 of the first slider 5, the second slider 6 and the third slider 7 in the radial direction of the circular splicing slider device are equal.
In the embodiment of the invention, the device further comprises a limiting baffle strip 2, wherein the limiting baffle strip 2 is fixedly arranged on the circular loading plate base 1 and is positioned outside the circular assembling sliding block device so as to limit the circular assembling sliding block device; a certain gap is formed between the circular assembling sliding block device and the limiting stop strip 2, so that enough space is ensured between the outer side surface of the third sliding block 7 and the limiting stop strip 2 to adapt to the development of radial deformation of the loading end surface of the sample.
In the embodiment of the invention, the edge of a round loading plate base 1 is provided with a plurality of counter bores 3, and a limiting stop bar 2 is fixed on the edge of the loading plate base 1 by counter bores 3 through counter bores 3; the limiting stop strip 2 is circular and rectangular in section and is made of high-strength non-deformable metal materials; the outer edge of the limiting baffle bar 2 is aligned with the outer edge of the circular loading plate base 1; the top surface of the limiting stop strip 2 is lower than the top surface of the top plate 12 of the sliding block, so that the top surface of the limiting stop strip 2 is ensured not to influence the loading and deformation of the end surface of the sample. It should be noted that, in the present embodiment, the counterbore 3 is a non-through hole to ensure the tightness of the sample.
In the embodiment of the invention, a loading plate drain hole 13 and a valve 14 are further arranged on the loading plate base 1 so as to conveniently control the drainage condition of the sample; the loading plate drain hole 13 is positioned at the inner side of the limiting baffle strip 2; and threads are arranged in the loading plate drain hole 13, and the valve 14 is detachably fixed in the loading plate drain hole 13 through the threads.
In the embodiment of the invention, the circular loading plate base 1 is made of a high-strength non-deformable magnetic metal material; the contact surface of the circular loading plate base 1 and the circular assembling sliding block device is designed by a high polishing plane; the sliding block bottom plate 8, the bull eye bearing 9, the supporting bearing 11 and the sliding block top plate 12 are all made of light high-strength metal materials.
The application method of the device comprises the following steps:
when the loading plate base is used, the limiting stop strip 2 is installed on the surface of a high polishing plane on the loading plate base 1 through the counter bore 3 and the counter head screw 4, then a concentric fan-shaped assembling slide block unit 15 is formed by one first slide block 5, two second slide blocks 6 and three third slide blocks 7 and is installed in a circular plane on the inner side of the limiting stop strip 2 on the loading plate base 1, and the circle center of the concentric fan-shaped assembling slide block unit 15 is aligned with the circle center of the loading plate base 1; the rest five concentric fan-shaped assembling sliding block units 15 are sequentially arranged on the loading plate base 1, and after the circular assembling sliding block device is arranged, the annular foam strip is used for filling the hole between the inner side wall of the limiting barrier strip 2 and the outer side wall of the circular assembling sliding block device; the loading plate base 1 and the circular assembling slide block device are overturned to be aligned and installed on the loading upper end face of the cylindrical sample to be tested, filter paper or geotextile is required to be installed on the sample before the loading plate is installed on the sample upper end face, and then a valve 14 and a water pipe connected with the valve 14 are installed in a loading plate drain hole 13 on the loading plate base 1; binding and fixing a latex rubber film on the outer side of the sample on the side surface of the loading plate base 1 through a rubber tube; at the moment, the mounting work of the loading plate on the upper end face of the cylindrical sample to be tested is finished, and the subsequent consolidation and loading test work of the sample is consistent with the operation method of a common triaxial test of the rigid loading plate.
Or sealing and fixing the loading plate base 1 on a triaxial apparatus base in advance, binding a latex rubber film on the side surface of the loading plate base 1 through a rubber tube, installing a test sample bearing cylinder, reversely sleeving the upper end of the latex rubber film on the sample bearing cylinder, installing a circular assembling slide block device according to the method, sequentially installing filter paper or geotechnical cloth, a sample and the like on the circular assembling slide block device, completing the installation of the circular loading plate at the lower end part of the triaxial sample, and after the installation of the loading plate at the upper end part of the sample is completed, then performing the test steps of consolidation, loading and the like which are consistent with the triaxial test method of a common rigid loading plate.
The base of the loading plate and the circular assembling slide block device are magnetically adsorbed to form the expandable deformation micro-friction resistance circular loading plate, a first slide block, a second slide block and a third slide block in the circular assembling slide block device can freely move and rotate on the circular loading plate base within a certain range through a bull eye bearing, and can freely rotate on the circular loading plate base through a supporting bearing so as to adapt to the deformation of the end face of a sample to be tested on the loading plate surface; the high-polishing loading plate base, the high-precision bull eye bearing and the supporting bearing are adopted to ensure that the loading plate can generate follow-up radial deformation along with the deformation of the test end face, so that the frictional resistance between the circular rigid loading plate and the test sample is greatly reduced or eliminated, the mechanical response of the soil sample can be truly and reasonably simulated, the height-diameter ratio of the triaxial cylindrical test sample can be further reduced, the difficulty of test operation is reduced, the use amount of the test sample is reduced, and the test expenditure is saved; the invention has the advantages of novel design, simple structure, convenient operation, good effect, strong practicability and wide applicability.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention, it should be noted that, for those skilled in the art, several modifications and decorations without departing from the principle of the present invention should be regarded as the protection scope of the present invention.
Claims (10)
1. An expandable deformation micro-friction resistance circular loading plate is characterized by comprising a circular loading plate base (1) and a circular assembling slide block device, wherein the circular loading plate base (1) has magnetism, the circular assembling slide block device can be adsorbed on the circular loading plate base (1), the circular assembling slide block device comprises a plurality of sub-slide blocks, and each sub-slide block is adsorbed on the circular loading plate base (1) and can move on the loading plate base (1); the circular assembling slide block device is in contact with a sample to be tested and can adapt to the deformation of the end face of the sample to be tested on a loading plate surface.
2. An expansible deformation micro-friction circular load plate according to claim 1, characterized in that said circular building block device comprises six identical concentric sector building block units (15), each concentric sector building block unit (15) comprising a first block (5), two second blocks (6) and three third blocks (7); the first sliding block (5) is fan-shaped, and the central angle is 60 degrees; the second sliding block (6) is in a fan-shaped ring shape, has a central angle of 30 degrees and is positioned on the outer side of the first sliding block (5); the third sliding block (7) is in a sector ring shape, the central angle is 20 degrees, and the third sliding block is positioned on the outer side of the second sliding block (6).
3. The expansible deformation micro-friction circular loading plate according to claim 2, characterized in that the first slider (5), the second slider (6) and the third slider (7) each comprise a slider bottom plate (8), a magnet (10), a support bearing (11), a slider top plate (12) and several bull's eye bearings (9);
the magnet (10) is fixed on the lower surface of the sliding block bottom plate (8), and the bull eye bearing (9) is arranged at the bottom of the sliding block bottom plate (8); the lower edge of the magnet (10) is higher than the lower edge of the bull eye bearing (9); the first sliding block (5), the second sliding block (6) and the third sliding block (7) are adsorbed on the circular loading plate base (1) through the attractive force between the magnet (10) and the magnetic circular loading plate base (1), and freely move and rotate on the circular loading plate base (1) through the bull eye bearing (9);
the supporting bearing (11) is arranged on the upper surface of the sliding block bottom plate (8), the sliding block top plate (12) is arranged on the supporting bearing (11), and the sliding block top plate (12) can freely rotate relative to the sliding block bottom plate (8) under the action of the supporting bearing (11).
4. An expansible deformation micro-friction circular loading plate according to claim 3, characterized in that the length of the top plate (12) of the first slider (5), the second slider (6) and the third slider (7) in the radial direction of the circular block device is equal.
5. The circular inflatable deformation micro-friction resistance loading plate according to claim 1, further comprising a limiting stop strip (2), wherein the limiting stop strip (2) is fixedly arranged on the circular loading plate base (1) and is positioned outside the circular assembling sliding block device so as to limit the circular assembling sliding block device.
6. The round load plate with expandable deformation and micro-friction resistance according to claim 5, wherein the edge of the round load plate base (1) is provided with a plurality of counter bores (3), and the limiting stop bars (2) are fixed on the edge of the load plate base (1) by counter screws (4) penetrating through the counter bores (3).
7. An expandable deformable micro-friction circular loading plate according to claim 6, wherein the limiting barrier strips (2) are circular and made of high-strength non-deformable metal; the outer edge of the limiting stop strip (2) is aligned with the outer edge of the circular loading plate base (1); the top surface of the limiting stop bar (2) is lower than the top surface of the sliding block top plate (12).
8. The inflatable deformable micro-friction circular load plate according to claim 1, wherein the load plate base (1) is further provided with a load plate drain hole (13) and a valve (14), and the load plate drain hole (13) is positioned at the inner side of the limiting barrier (2); and threads are arranged in the loading plate drain hole (13), and the valve (14) is detachably fixed in the loading plate drain hole (13) through the threads.
9. The expansible deformation micro-friction resistance circular load plate according to claim 1, characterized in that the circular load plate base (1) is made of high-strength non-deformable magnetic metal material; the contact surface of the circular loading plate base (1) and the circular assembling sliding block device adopts a high-polishing plane design.
10. The circular expandable deformation micro-friction load plate according to claim 3, wherein the bottom plate (8), the eye bearing (9), the support bearing (11) and the top plate (12) are made of light high-strength metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138737.1A CN112213190B (en) | 2020-10-22 | 2020-10-22 | Expandable deformation micro-friction resistance circular loading plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138737.1A CN112213190B (en) | 2020-10-22 | 2020-10-22 | Expandable deformation micro-friction resistance circular loading plate |
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| CN112213190A true CN112213190A (en) | 2021-01-12 |
| CN112213190B CN112213190B (en) | 2022-04-01 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001091381A (en) * | 1999-09-21 | 2001-04-06 | Osaka Gas Co Ltd | Method for testing consolidation of ground material and its device |
| CN102183454A (en) * | 2011-03-02 | 2011-09-14 | 上海大学 | Unsaturated soil tester for testing deformation of soil sample of clay in real time |
| CN104089813A (en) * | 2014-07-14 | 2014-10-08 | 长江水利委员会长江科学院 | Geotechnical engineering triaxial compression test micro-friction load force transfer plate |
| CN104697868A (en) * | 2015-03-31 | 2015-06-10 | 辽宁工程技术大学 | Static-dynamic combined loading device used for rockburst simulation experiment |
| CN105021461A (en) * | 2015-08-14 | 2015-11-04 | 长江水利委员会长江科学院 | Bidirectional micro-friction load force transmission plate for soil engineering true triaxial test |
-
2020
- 2020-10-22 CN CN202011138737.1A patent/CN112213190B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001091381A (en) * | 1999-09-21 | 2001-04-06 | Osaka Gas Co Ltd | Method for testing consolidation of ground material and its device |
| CN102183454A (en) * | 2011-03-02 | 2011-09-14 | 上海大学 | Unsaturated soil tester for testing deformation of soil sample of clay in real time |
| CN104089813A (en) * | 2014-07-14 | 2014-10-08 | 长江水利委员会长江科学院 | Geotechnical engineering triaxial compression test micro-friction load force transfer plate |
| CN104697868A (en) * | 2015-03-31 | 2015-06-10 | 辽宁工程技术大学 | Static-dynamic combined loading device used for rockburst simulation experiment |
| CN105021461A (en) * | 2015-08-14 | 2015-11-04 | 长江水利委员会长江科学院 | Bidirectional micro-friction load force transmission plate for soil engineering true triaxial test |
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| CN112213190B (en) | 2022-04-01 |
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