CN212301067U - Cube geotechnical sample preparation device - Google Patents
Cube geotechnical sample preparation device Download PDFInfo
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- CN212301067U CN212301067U CN202021216559.5U CN202021216559U CN212301067U CN 212301067 U CN212301067 U CN 212301067U CN 202021216559 U CN202021216559 U CN 202021216559U CN 212301067 U CN212301067 U CN 212301067U
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Abstract
The utility model discloses a cube geotechnical sample preparation device, which comprises a reaction frame, a hydraulic jack, a supporting plate, a test mold and a pressing block; the reaction frame comprises a reaction frame bottom plate, a reaction frame top plate and reaction frame upright columns, wherein the reaction frame bottom plate and the reaction frame top plate are fixedly connected through the reaction frame upright columns; the hydraulic jack is arranged on the upper surface of the reaction frame bottom plate, the supporting plate is arranged above the hydraulic jack, the test mould is arranged on the supporting plate, the press block is arranged above the soil sample in the test mould, and the top of the press block is in contact with the reaction frame top plate; the test mold comprises a bottom plate and four same rectangular plates, the four same rectangular plates are enclosed to form a square frame, the two adjacent rectangular plates are detachably connected, a groove matched with the square frame is formed in the bottom plate, and the square frame is connected with the bottom plate in a clamped mode through the groove. The device is easy to demould when preparing a sample, and the sample can be taken out by opening a test mould without the help of a demoulding device; scales are arranged on the periphery of the outer surface of the pressing block, so that the pressing block can be accurately controlled not to deflect.
Description
Technical Field
The utility model relates to a civil engineering technical field specifically is a cube geotechnique system appearance device.
Background
In order to test the compressive strength of a soil body, cube and cylinder samples are commonly adopted in geotechnical tests, and a sample preparation device and a sample preparation method of the cylinder sample are mature, but the existing sample preparation method of the cube sample has many defects, particularly, external force is needed for demolding, so that the stress state and the internal structure of the sample are changed, errors are caused to the strength of the soil body, and the accuracy of a test result is influenced. Therefore, in order to provide better test data for geotechnical tests and ensure the accuracy of test results, the research on the cube demolding-free sample preparation device is particularly important.
The existing indoor sample preparation method is mostly compaction sample preparation or static pressure sample preparation, the compaction sample preparation method is a method of compacting a soil sample to a required size by a certain mass of heavy hammer from a determined height layer by layer, and the static pressure sample preparation method is a method of placing a certain mass of soil into a sample preparation mould, pressing by a jack, compacting to a corresponding volume to obtain the soil sample with required dry density and water content. In addition, most of the existing cubic molds for preparing samples are inconvenient to demold or easily cause disturbance to the soil samples.
The prior art samples are mostly cylindrical and require demolding by means of a demolding device or external force extrusion. When the test needs the sample of different cross sectional shapes, it can lack the contrast and the commonality of test data to rely on cylindrical sample alone, and the external force of exerting in the drawing of patterns in-process probably causes damage and damage to the test piece, directly influences the result of experiment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, and provide a cube geotechnique system appearance device.
Realize the utility model discloses the technical scheme of purpose is:
a cube geotechnical sample preparation device comprises a reaction frame, a hydraulic jack, a supporting plate, a test mold and a pressing block;
the reaction frame comprises a reaction frame bottom plate, a reaction frame top plate and reaction frame upright columns, wherein the reaction frame bottom plate and the reaction frame top plate are fixedly connected through the reaction frame upright columns;
the hydraulic jack is arranged on the upper surface of the reaction frame bottom plate, the supporting plate is arranged above the hydraulic jack, the test mould is arranged on the supporting plate, the press block is arranged above the soil sample in the test mould, and the top of the press block is in contact with the reaction frame top plate;
the test mold comprises a bottom plate and four same rectangular plates, the four same rectangular plates are enclosed to form a square frame, the two adjacent rectangular plates are detachably connected, a groove matched with the square frame is formed in the bottom plate, and the square frame is connected with the bottom plate in a clamped mode through the groove.
The central axes of the hydraulic jack, the supporting plate and the test mould are on the same straight line.
The upper surface of the bottom plate is provided with a filter paper layer, and the inner surface of the rectangular frame is provided with a demoulding layer coated with a demoulding agent.
The briquetting, for the hollow cuboid case that top opening, below were sealed, the box surface is equipped with the scale in vertical direction, the cross section of box is the square, square length of side is 1mm than the interior limit length of side of examination mould square frame.
The utility model provides a pair of cube geotechnique system appearance device, the device has following advantage:
1. the prepared cubic geotechnical sample is easy to demould, and the sample can be taken out by opening the test mould without the aid of demoulding equipment, so that the damage of external force to the structure of the sample is avoided, and the accuracy of subsequent strength test of the sample is improved;
2. scales are arranged on the periphery of the outer surface of the pressing block, so that the pressing block can be accurately controlled not to deflect, and the flatness of the surface of the sample is controlled;
3. the device occupies small space and is convenient to store and carry; the structure is simple, the operation is convenient, and the manufacture and the maintenance are convenient;
4. the sample of this device preparation can be used to experiment such as unlimited compressive strength, indirect tensile strength, concrete resistance to compression, indoor resistance to compression resilience modulus, dynamic modulus and anti splitting to and inorganic binder stable material, remold the preparation of cohesive soil sample and concrete test stake.
Drawings
FIG. 1 is a schematic structural view of a cubic geotechnical sampling device;
FIG. 2 is a top view of a square frame;
in the figure: 1. the device comprises a reaction frame top plate 2, a reaction frame bottom plate 3, a supporting plate 4, a hydraulic jack 5, a reaction frame upright post 6, a soil sample 7, a pressing block 8, a test die 9, scales 10, a bottom plate 11 and a rectangular plate.
Detailed Description
The present invention will be further explained with reference to the drawings and examples, but the present invention is not limited thereto.
As shown in fig. 1 and 2:
a cube geotechnical sampling device comprises a reaction frame, a hydraulic jack 4, a supporting plate 3, a test mold 8 and a pressing block 7;
the reaction frame comprises a reaction frame bottom plate 2, a reaction frame top plate 1 and reaction frame upright columns 5, wherein the reaction frame bottom plate 2 and the reaction frame top plate 1 are fixedly connected through the reaction frame upright columns 5; in the embodiment, a reaction frame top plate 1 and a reaction frame bottom plate 2 are square steel plates with the side length of 300mm and the thickness of 15mm, the distance between the two plates is 400mm, and round holes with the diameter of 20mm are respectively arranged at four corners of each plate; the reaction frame upright post 5 adopts a solid cylinder with the diameter of 20mm and the length of 450mm, and the four cylinders penetrate through round holes of the reaction frame bottom plate 2 and the top plate 1 and are fixed by bolts to form a reaction frame;
the hydraulic jack 4 is arranged on the upper surface of the reaction frame bottom plate 2, the supporting plate 3 is arranged above the hydraulic jack 4, the test mould 8 is arranged on the supporting plate 3, the pressing block 7 is arranged above the soil sample 6 in the test mould 8, and the top of the pressing block 7 is in contact with the reaction frame top plate 1; in the embodiment, the supporting plate 3 is a square plate with the side length of 200mm and the thickness of 600mm, a round hole is formed in the center of the supporting plate 3, the diameter of the round hole is 1mm larger than that of the top end of the jack, the depth of the round hole is 500, and the top end of the jack 4 is inserted into the round hole of the supporting plate 3;
the test mold 8 comprises a bottom plate 10 and four identical rectangular plates 11, the four identical rectangular plates 11 enclose a square frame, two adjacent rectangular plates 11 are detachably connected, a groove matched with the square frame is formed in the bottom plate 10, and the square frame is clamped with the bottom plate 10 through the groove; in this embodiment, the length of the inner side of the square frame is 150mm, the thickness of the rectangular plate is 10mm, two adjacent rectangular plates are bolted, the contact surfaces of the two rectangular plates are 45-degree oblique sections, it is ensured that the four rectangular plates are tightly spliced and do not slide, the bottom plate is a steel plate with the thickness of 20mm and the side length of 200mm, the depth of the groove on the bottom plate is 5mm, and the width of the groove is 11 mm.
The central axes of the hydraulic jack 4, the supporting plate 3 and the test mould 8 are on the same straight line.
The upper surface of the bottom plate 10 is provided with a filter paper layer, and the inner surface of the rectangular frame is provided with a demoulding layer coated with a demoulding agent.
Briquetting 7 for the hollow cuboid case that top opening, below were sealed, the box surface is equipped with scale 9 in vertical direction, the cross section of box is the square, square side length is 1mm than the interior limit length of square frame of examination mould.
The method for manufacturing the sample by using the device comprises the following steps:
1. preparing a soil sample according to the design requirements of the test, and installing a test mold;
2. putting filter paper at the bottom in a test mold, and coating a layer of uniform release agent on the inner wall of the test mold to serve as a release layer, so that the soil sample is not adhered to the inner wall when being released;
3. pouring a soil sample with specified mass into a test mold, and primarily scraping and tamping;
4. sequentially placing the hydraulic jack, the supporting plate and the test mold on a bottom plate of the reaction frame, and then placing the pressing block on the upper part of the test mold;
5. slowly lifting the hydraulic jack, tightly squeezing the soil material through the pressing block, observing scale readings on four sides of the pressing block in the static pressure process, wherein the readings on the side surfaces of the pressing block in four directions are consistent, and keeping the pressure of the jack for 2min when the exposed height of the pressing block is 10 mm;
6. and releasing the pressure of the jack, descending the supporting plate, taking out the test mold and the pressing block, loosening the bolt on the outer side of the test mold, and opening the side plate of the test mold to take out the sample.
Claims (4)
1. A cube geotechnical sample preparation device is characterized by comprising a reaction frame, a hydraulic jack, a supporting plate, a test mold and a pressing block;
the reaction frame comprises a reaction frame bottom plate, a reaction frame top plate and reaction frame upright columns, wherein the reaction frame bottom plate and the reaction frame top plate are fixedly connected through the reaction frame upright columns;
the hydraulic jack is arranged on the upper surface of the reaction frame bottom plate, the supporting plate is arranged above the hydraulic jack, the test mould is arranged on the supporting plate, the press block is arranged above the soil sample in the test mould, and the top of the press block is in contact with the reaction frame top plate;
the test mold comprises a bottom plate and four same rectangular plates, the four same rectangular plates are enclosed to form a square frame, the two adjacent rectangular plates are detachably connected, a groove matched with the square frame is formed in the bottom plate, and the square frame is connected with the bottom plate in a clamped mode through the groove.
2. A cubic soil sampling device according to claim 1, wherein the central axes of the hydraulic jack, the supporting plate and the test mold are in the same line.
3. A cubic geotechnical sample preparation device as claimed in claim 1, wherein said bottom plate is provided at an upper surface thereof with a filter paper layer, and an inner surface of the rectangular frame is provided with a release layer coated with a release agent.
4. The cube geotechnical sample preparation device according to claim 1, wherein the pressing block is a hollow cuboid box with an upper opening and a lower opening, scales are arranged on the outer surface of the box body in the vertical direction, the cross section of the box body is square, and the side length of the square is 1mm shorter than the inner side of a square frame of the test mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021216559.5U CN212301067U (en) | 2020-06-29 | 2020-06-29 | Cube geotechnical sample preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021216559.5U CN212301067U (en) | 2020-06-29 | 2020-06-29 | Cube geotechnical sample preparation device |
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| Publication Number | Publication Date |
|---|---|
| CN212301067U true CN212301067U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021216559.5U Expired - Fee Related CN212301067U (en) | 2020-06-29 | 2020-06-29 | Cube geotechnical sample preparation device |
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| Country | Link |
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| CN (1) | CN212301067U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903460A (en) * | 2021-02-04 | 2021-06-04 | 太原理工大学 | Device and method for testing multi-row group column single-shaft bearing of inclined goaf under disturbance influence |
| CN114739729A (en) * | 2022-04-29 | 2022-07-12 | 中国电建集团成都勘测设计研究院有限公司 | Construction method for rapidly obtaining undisturbed soil samples in batches |
-
2020
- 2020-06-29 CN CN202021216559.5U patent/CN212301067U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903460A (en) * | 2021-02-04 | 2021-06-04 | 太原理工大学 | Device and method for testing multi-row group column single-shaft bearing of inclined goaf under disturbance influence |
| CN114739729A (en) * | 2022-04-29 | 2022-07-12 | 中国电建集团成都勘测设计研究院有限公司 | Construction method for rapidly obtaining undisturbed soil samples in batches |
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| Date | Code | Title | Description |
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| 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: 20210105 Termination date: 20210629 |