CN210571641U - Triaxial test remolded soil system appearance - Google Patents
Triaxial test remolded soil system appearance Download PDFInfo
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- CN210571641U CN210571641U CN201921448533.0U CN201921448533U CN210571641U CN 210571641 U CN210571641 U CN 210571641U CN 201921448533 U CN201921448533 U CN 201921448533U CN 210571641 U CN210571641 U CN 210571641U
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Abstract
The utility model discloses a three-axis test remolded soil sample preparation instrument, which comprises a counter-force beam, wherein a limiting compaction device, a pressing sample cylinder, a bearing tray and a hydraulic jack are arranged below the counter-force beam; the pressing sample cylinder is provided with a cylinder body, the cylinder body is of a cylindrical structure formed by encircling of multiple petals, an annular pressing plate extending outwards is arranged at the top, a base is arranged at the bottom, the base and the annular pressing plate are fastened together through a pull rod and a screw, and a limiting spigot is arranged on the annular pressing plate; the limiting compaction device is provided with a vertical reverse pushing seat and a vertical guide rod which are fixedly connected with the counter-force beam, the vertical guide rod is abutted below the vertical reverse pushing seat, a compaction disc which is vertically and fixedly connected with the vertical guide rod is arranged below the vertical guide rod, the compaction disc is in sliding connection with the barrel, a plurality of clamping grooves are uniformly distributed on the vertical guide rod, and limiting discs are arranged in the clamping grooves; the pressing sample cylinder is supported by a bearing tray, and the bearing tray is driven by a hydraulic jack to lift. The utility model is simple in operation, system appearance is even, the precision is high, low in labor strength, can prepare out the triaxial test soil sample of preset's different density or compactness.
Description
Technical Field
The utility model belongs to the technical field of geotechnique system appearance equipment, especially a system appearance that utilizes remolded soil preparation test sample among the triaxial test.
Background
The indoor geotechnical test can research the complex characteristics of soil, verify the soil mechanics theory based on the test data and promote the development of the soil mechanics theory. The triaxial test is an important test item in the geotechnical test, the triaxial compressor is an instrument which is relatively complete in researching the strength characteristic of soil and determining the shear strength of the soil, 3-4 cylindrical test pieces are usually required to be prepared by using undisturbed soil, but due to the influence of soil sample taking from the site and remolding in the test operation, the test pieces meeting the test requirements are often difficult to prepare in sufficient quantity, in addition, the mechanical parameters of the soil samples with different densities or compactibility need to be tested in the research, the test pieces meeting the test requirements are difficult to prepare at present, and therefore the disturbed soil is required to be used for preparing the remolded soil sample in the triaxial test. How to prepare a triaxial test sample meeting the requirements of geotechnical test regulations and rock-soil theory research becomes an urgent problem to be solved.
At present, a sample is prepared by a triaxial test, a load is mainly provided by a hammer, and the sample is compacted in a sample beater in a layering mode. Although the method can meet the requirements of conventional geotechnical tests, certain defects exist in the application process: 1) the sample cannot be prepared according to the preset density or compaction degree; 2) the impact hammer is used for providing load, the impact of manpower is great, the hammering times of each layer of soil are not specified, and the compaction effect of the test soil sample is artificially judged to have certain blindness and subjectivity; 3) the compaction effect of each layer of soil is different under the influence of human factors, and the difference of each layer of soil influences the strength parameter test result of the whole test piece. 4) It is difficult to prepare triaxial test specimens of different preset densities or compactities. In conclusion, the existing method for preparing the sample by the triaxial test has the problems of complex operation, uneven sample preparation, poor sample preparation precision and high labor intensity.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the known art and provide a triaxial test remolded soil system appearance, easy operation, system appearance is even, the precision is high, low in labor strength.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a triaxial test remolded soil sample preparation instrument comprises a counter-force beam fixed at the tops of a left supporting upright post and a right supporting upright post, wherein a limiting compaction device, a pressing sample cylinder, a bearing tray and a hydraulic jack are sequentially arranged below the counter-force beam from top to bottom; the sample pressing barrel is provided with a barrel body, the barrel body is of a cylindrical structure formed by encircling of multiple petals, the multiple petal cylindrical structures are connected together in a hooping mode, an annular pressing plate extending outwards is arranged at the top, a base is arranged at the bottom, the base and the annular pressing plate are fastened together through a pull rod and a screw, and a limiting spigot is arranged on the annular pressing plate; the limiting compaction device is provided with a vertical reverse pushing seat and a vertical guide rod which are fixedly connected with the counter-force beam, the vertical guide rod is abutted to the lower part of the vertical reverse pushing seat, a compaction disc which is vertically and fixedly connected with the vertical guide rod is arranged below the vertical guide rod, the compaction disc is in sliding connection with the barrel body, a plurality of clamping grooves are uniformly distributed on the vertical guide rod from bottom to top, a limiting disc matched with the limiting spigot is connected to the vertical guide rod, and the limiting disc is clamped in any one of the clamping grooves; the pressing sample cylinder is supported by the bearing tray, and the bearing tray is driven by the hydraulic jack to lift.
The upper surface of the base is provided with a limiting groove, and the bottom of the barrel is embedded and fixed in the limiting groove of the base.
And a limiting groove is arranged below the annular pressure plate, and the top of the barrel is embedded and fixed in the limiting groove of the annular pressure plate.
And a T-shaped groove is formed below the vertical reverse pushing seat, and a T-shaped connecting block arranged in the T-shaped groove is arranged at the top of the vertical guide rod.
The vertical guide rod and the limiting disc are both made of copper or stainless steel.
The utility model has the advantages and positive effects that: 1) the hydraulic jack is adopted to replace a hammer to provide load output, so that human errors are avoided, the operation is simple, and the labor intensity is low; 2) the compaction height of each layer of soil is accurately limited by adopting a limiting disc, so that the compaction effect of each layer of soil is uniform and consistent, the quality of each layer of soil is equal, the sample preparation is uniform, and the precision is high; 3) the uniformity and the compactness of the prepared sample are kept consistent, and the difference of each layer of soil is very small, so that the test result of the whole test piece is more scientific and reasonable; 4) triaxial test specimens of different predetermined densities or compactities can be prepared.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a top view of the limiting plate of the present invention.
In the figure: 1. an annular pressure plate; 2. a barrel; 3. tightening; 4. a base; 5. a vertical guide rod; 6. a limiting disc; 7. a screw; 8. a pull rod; 9. a counter-force beam; 10. a vertical reverse pushing seat; 11. supporting the upright post; 12. a force bearing tray; 13. a hydraulic jack; 14. an uplink switch; 15. a down switch; 16. and (5) compacting the disc.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1-2, a three-axis test remolded soil sample preparation instrument comprises a counter-force beam 9 fixed at the top of a left support upright post and a right support upright post 11, wherein a limiting compaction device, a pressing sample cylinder, a force bearing tray 12 and a hydraulic jack 13 are sequentially arranged below the counter-force beam 9 from top to bottom.
The pressing sample cylinder is provided with a cylinder body 2, the cylinder body 2 is a cylinder structure formed by a plurality of valves in a surrounding mode, the plurality of valves of the cylinder structure are connected together by a tightening ring 3, an annular pressing plate 1 extending outwards is arranged at the top, a base 4 is arranged at the bottom, the base 4 is fastened with the annular pressing plate 1 through a pull rod 8 and a screw 7, and a limiting spigot is arranged on the annular pressing plate 1. In the present embodiment, the cylinder 2 is a cylinder structure surrounded by three lobes.
The limiting compaction device is provided with a vertical reverse pushing seat 10 fixedly connected with the counter-force beam 9 and a vertical guide rod 5, the vertical guide rod 5 is abutted to the lower portion of the vertical reverse pushing seat 10, a compaction disc 16 vertically and fixedly connected with the vertical guide rod 5 is arranged below the vertical guide rod 5, the compaction disc 16 is in sliding connection with the barrel body 2, a plurality of clamping grooves are uniformly distributed on the vertical guide rod 5 from bottom to top, and in the embodiment, the number of the clamping grooves is 4. The vertical guide rod 5 is connected with a limiting disc 6 matched with the limiting spigot, and the limiting disc 6 is clamped in any one of the clamping grooves.
The pressing sample cylinder is supported by the bearing tray 12, and the bearing tray is driven by the hydraulic jack to lift.
In this embodiment, a limiting groove is arranged on the base 4, and the bottom of the cylinder 2 is embedded in the limiting groove of the base 4. A limiting groove is arranged below the annular pressing plate 1, and the top of the cylinder body 2 is embedded and fixed in the limiting groove of the annular pressing plate 1. A T-shaped groove is formed below the vertical reverse pushing seat 10, and a T-shaped connecting block arranged in the T-shaped groove is arranged at the top of the vertical guide rod 5. The vertical guide rod 5 and the limiting disc 6 are both made of copper or stainless steel, so that the anti-rust and durable effects are achieved.
The method for preparing the remolded soil sample for the triaxial test by applying the sample preparation instrument comprises the following steps:
1) preparing remolded soil according to the preset dry density and the preset water content;
2) equally dividing the remolded soil into four parts according to the volume of the cylinder body of the sample preparation cylinder and the mass of wet soil required by the required dry density;
3) fixing the pressing sample cylinder on a bearing tray 12, then pouring a first part of wet soil into a cylinder body 2, clamping a limiting disc 6 in a first clamping groove (a second clamping groove, a third clamping groove and a fourth clamping groove are arranged downwards in sequence) of a vertical guide rod 5 positioned at the uppermost part, pressing an ascending switch 14, applying static pressure upwards by a hydraulic jack 13, moving the bearing tray 12 upwards until the limiting disc 6 is embedded into a limiting spigot on an annular pressing plate 1 and stops, and at the moment, tightly pressing a first layer of soil sample to a 1/4 position of the cylinder body 2 by the vertical guide rod 5; then, the down switch 15 is pressed, and the hydraulic jack 13 drives the pressing sample cylinder to descend until the vertical guide rod is separated from the cylinder body.
4) Scraping the surface of the first layer of soil sample by using a brush, then pouring a second part of remolded soil into the barrel, clamping the limiting disc 6 in a second clamping groove of the guide rod, and repeating the step 3) to compact the second layer of soil;
5) repeating the step 4) until the compaction of all the remolded soil is completed;
6) the cylinder 2 is disassembled, the sample is taken out, the two ends of the sample are leveled, and the diameter and the height of the sample are weighed and measured. And finishing the preparation of the triaxial test sample by remolded soil.
The utility model discloses a go into spacing dish 6 in proper order in the draw-in groove on the vertical guide arm 5 for vertical guide arm 5 carries out the layering compaction to the remolded soil of the same quality of putting into in proper order in the system appearance section of thick bamboo respectively.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (5)
1. A triaxial test remolded soil sample preparation instrument is characterized by comprising a counter-force beam fixed at the tops of a left supporting upright post and a right supporting upright post, wherein a limiting compaction device, a pressing sample cylinder, a bearing tray and a hydraulic jack are sequentially arranged below the counter-force beam from top to bottom;
the sample pressing barrel is provided with a barrel body, the barrel body is of a cylindrical structure formed by encircling of multiple petals, the multiple petal cylindrical structures are connected together in a hooping mode, an annular pressing plate extending outwards is arranged at the top, a base is arranged at the bottom, the base and the annular pressing plate are fastened together through a pull rod and a screw, and a limiting spigot is arranged on the annular pressing plate;
the limiting compaction device is provided with a vertical reverse pushing seat and a vertical guide rod which are fixedly connected with the counter-force beam, the vertical guide rod is abutted to the lower part of the vertical reverse pushing seat, a compaction disc which is vertically and fixedly connected with the vertical guide rod is arranged below the vertical guide rod, the compaction disc is in sliding connection with the barrel body, a plurality of clamping grooves are uniformly distributed on the vertical guide rod from bottom to top, a limiting disc matched with the limiting spigot is connected to the vertical guide rod, and the limiting disc is clamped in any one of the clamping grooves;
the pressing sample cylinder is supported by the bearing tray, and the bearing tray is driven by the hydraulic jack to lift.
2. The triaxial test remolded soil sampling instrument as recited in claim 1, wherein a limit groove is provided on the base, and the bottom of the barrel is embedded in the limit groove of the base.
3. The triaxial test remolded soil sampling instrument as recited in claim 1, wherein a limiting groove is provided below the annular pressure plate, and the top of the barrel is embedded in the limiting groove of the annular pressure plate.
4. The triaxial test remolded soil sampling apparatus of claim 1, wherein a T-shaped groove is provided below the vertical reverse pushing seat, and a T-shaped connecting block mounted in the T-shaped groove is provided at the top of the vertical guide rod.
5. The tri-axial test remolded soil sampling apparatus of claim 1, wherein the vertical guide rod and the limiting disk are both made of copper or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921448533.0U CN210571641U (en) | 2019-09-02 | 2019-09-02 | Triaxial test remolded soil system appearance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921448533.0U CN210571641U (en) | 2019-09-02 | 2019-09-02 | Triaxial test remolded soil system appearance |
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| CN210571641U true CN210571641U (en) | 2020-05-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707521A (en) * | 2020-07-29 | 2020-09-25 | 长安大学 | Large-scale cylindrical loess remolding sample preparation equipment with controllable initial conditions and sample preparation method |
| CN114414320A (en) * | 2021-12-01 | 2022-04-29 | 上海工程技术大学 | Static pressure rapid sample preparation device for triaxial test, sample preparation method and demolding method |
-
2019
- 2019-09-02 CN CN201921448533.0U patent/CN210571641U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707521A (en) * | 2020-07-29 | 2020-09-25 | 长安大学 | Large-scale cylindrical loess remolding sample preparation equipment with controllable initial conditions and sample preparation method |
| CN114414320A (en) * | 2021-12-01 | 2022-04-29 | 上海工程技术大学 | Static pressure rapid sample preparation device for triaxial test, sample preparation method and demolding method |
| CN114414320B (en) * | 2021-12-01 | 2023-11-24 | 上海工程技术大学 | Static pressure rapid sample preparation device for triaxial test, sample preparation method and demolding method |
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