CN215910268U - Remold stickness soil direct shear test's system appearance device - Google Patents
Remold stickness soil direct shear test's system appearance device Download PDFInfo
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- CN215910268U CN215910268U CN202122290628.8U CN202122290628U CN215910268U CN 215910268 U CN215910268 U CN 215910268U CN 202122290628 U CN202122290628 U CN 202122290628U CN 215910268 U CN215910268 U CN 215910268U
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Abstract
The utility model discloses a sample preparation device for a remolded cohesive soil direct shear test, which comprises a base, a cutting ring and a pressing block, wherein the cutting ring is arranged on the base; a round cavity with a closed lower end and an open upper end is arranged in the base; the outer diameter of the cutting ring is matched with the diameter of the circular cavity; the pressing block comprises a first pressing block and a second pressing block; the first pressing block is a cylindrical pressing block, and the diameter of the first pressing block is matched with the inner diameter of the cutting ring; the second briquetting is including pressing appearance head, limiting plate and the head of exerting pressure, presses appearance head, limiting plate and exerts the pressure head and sets firmly even as an organic whole in proper order by supreme down, and the central axis is on same straight line, wherein: the diameter of the sample pressing head is matched with the inner diameter of the cutting ring, the diameter of the limiting plate is larger than that of the circular cavity, and the diameter of the pressure applying head is smaller than that of the sample pressing head. The device has simple structure and high sample preparation efficiency, and can prepare samples in a layered manner so that the density of the soil sample is uniform; the base can be dismantled, is convenient for unload the cutting ring soil sample that system appearance was accomplished from the base, reduces the influence of cutting ring soil sample to the direct shear test result.
Description
Technical Field
The utility model relates to the technical field of geotechnical tests, in particular to a sample preparation device for a remolded cohesive soil direct shear test.
Background
In order to test the direct shear strength of remolded cohesive soil, a cutting ring with a diameter of 61.8mm and a thickness of 20mm is often used for direct shear test sampling. Generally, a larger cylindrical soil sample is prepared by a static pressure or compaction method, then the soil sample is cut into a cutting ring soil sample with the diameter of 61.8mm and the thickness of 20mm, and finally the cutting ring and the soil sample are put into a shearing box together for a shearing test. The method has the biggest defects that the density of the soil sample is difficult to accurately control, and the difference of the densities of different cutting ring soil samples easily causes larger error of the test result. In addition, the soil sample is fixed at a thickness of 20mm, the densities of different vertical positions are different, the large difference of the density of a shearing surface is easily caused, and the existing sample preparation device is not easy to detach the circular knife soil sample from the device, so that the direct shearing test result is influenced. Therefore, in order to ensure the accuracy of the direct shear test, the accuracy and uniformity of the density of the ring cutter soil sample must be improved so as to ensure the accuracy of the direct shear test result.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a sample preparation device for a remolded cohesive soil direct shear test.
The technical scheme for realizing the purpose of the utility model is as follows:
a sample preparation device for a remolded cohesive soil direct shear test comprises a base, a cutting ring and a pressing block; a round cavity with a closed lower end and an open upper end is arranged in the base; the outer diameter of the cutting ring is matched with the diameter of the circular cavity; the pressing block comprises a first pressing block and a second pressing block; the first pressing block is a cylindrical pressing block, and the diameter of the first pressing block is matched with the inner diameter of the cutting ring; the second briquetting is including pressing appearance head, limiting plate and the head of exerting pressure, presses appearance head, limiting plate and exerts the pressure head and sets firmly even as an organic whole in proper order by supreme down, and the central axis is on same straight line, wherein: the diameter of the sample pressing head is matched with the inner diameter of the cutting ring, the diameter of the limiting plate is larger than that of the circular cavity, and the diameter of the pressure applying head is smaller than that of the sample pressing head.
The base comprises an upper base and a lower base, wherein the upper base and the lower base are detachably connected through threads.
The diameter of the round cavity is 65.5mm, and the height of the round cavity is 40 mm.
The cutting ring comprises an upper cutting ring and a lower cutting ring, the heights of the upper cutting ring and the lower cutting ring are both 20mm, the outer diameters of the upper cutting ring and the lower cutting ring are both 65.5mm, and the inner diameters of the upper cutting ring and the lower cutting ring are both 61.3 mm.
The first pressing block comprises two cylindrical pressing blocks, the diameters of the two cylindrical pressing blocks are 61.3mm, and the heights of the two cylindrical pressing blocks are 6mm and 14mm respectively.
The sample pressing head is 61.3mm in diameter and 20mm in height; the diameter of the limiting plate is 71.8mm, and the height of the limiting plate is 10 mm; the pressure applying head has a diameter of 30mm and a height of 30 mm.
The sample preparation device for the remolded cohesive soil direct shear test is simple in structure and high in sample preparation efficiency, and can prepare samples in a layered manner, so that the density of the soil sample is uniform; the base can be dismantled, is convenient for unload the cutting ring soil sample that system appearance was accomplished from the base, reduces the influence of cutting ring soil sample to the direct shear test result.
Drawings
FIG. 1 is a schematic representation of a soil sample of the present invention after compaction;
FIG. 2 is a schematic view of a second compact;
FIG. 3 is a schematic view of a base;
in the figure: 1. the lower base 2, the upper base 3, the cutting ring 4, the first pressing block 5, the second pressing block 6, the soil sample 7, the sample pressing head 8, the limiting plate 9 and the pressure applying head 10 are circular cavities.
Detailed Description
The utility model will be further elucidated with reference to the drawings and examples, without however being limited thereto.
Example (b):
as shown in fig. 1, 2, and 3:
a sample preparation device for a remolded cohesive soil direct shear test comprises a base, a cutting ring 3 and a pressing block; the base is cylindrical or in other column shapes, the base of the embodiment is cylindrical and comprises an upper base 2 and a lower base 1, the upper base 2 and the lower base 1 are detachably connected through threads, the base is made of steel plates, the thickness of the base is 5mm, and a round cavity 10 with a closed lower end and an open upper end is arranged in the base; the outer diameter of the cutting ring 3 is matched with the diameter of the circular cavity 10; the pressing block comprises a first pressing block 5 and a second pressing block 4; the first pressing block 5 is a cylindrical pressing block, and the diameter of the first pressing block is matched with the inner diameter of the cutting ring 3; second briquetting 4 is including pressing appearance head 7, limiting plate 8 and the head 9 of exerting pressure, presses appearance head 7, limiting plate 8 and the head 9 of exerting pressure to set firmly even as an organic whole in proper order by supreme down, and the central axis is on same straight line, wherein: the diameter of the sample pressing head 7 is matched with the inner diameter of the cutting ring 3, the diameter of the limiting plate 8 is larger than that of the circular cavity 10, and the diameter of the pressure applying head 9 is smaller than that of the sample pressing head 7.
The diameter of the round cavity 10 is 65.5mm, and the height is 40 mm.
The cutting ring 3 comprises an upper cutting ring and a lower cutting ring, the heights of the upper cutting ring and the lower cutting ring are both 20mm, the outer diameters of the upper cutting ring and the lower cutting ring are both 65.5mm, and the inner diameters of the upper cutting ring and the lower cutting ring are both 61.3 mm.
The first pressing block 5 comprises two cylindrical pressing blocks, the diameters of the two cylindrical pressing blocks are 61.3mm, and the heights of the two cylindrical pressing blocks are 6mm and 14mm respectively.
The sample pressing head 7 is 61.3mm in diameter and 20mm in height; the diameter of the limiting plate 8 is 71.8mm, and the height of the limiting plate is 10 mm; the diameter of the pressure applying head 9 is 30mm, and the height of the pressure applying head is 30 mm.
The sample preparation is carried out by using the device, and the method specifically comprises the following steps:
1) connecting the upper part and the lower part of the base, then sequentially placing two ring cutters 3 with the height of 20mm into a circular cavity 10 of the base, and coating vaseline on the inner walls of the ring cutters 3;
2) weighing soil materials 6 with preset mass, putting the soil materials into the cutting ring 3, and roughly scraping the surface;
3) sequentially placing a first pressing block 5 and a second pressing block 4 with the thickness of 14mm on the soil 6, and lightly pressing a pressing head 9 of the first pressing block 4 by a hand;
4) applying a force to a pressure applying head 9 of the first pressing block 4 by using a counter-pressure device, such as a counter-pressure frame or a press machine, so as to compact the soil sample 6 and obtain a first layer of soil sample with the thickness of 6 mm;
5) sequentially taking out a first pressing block 5 and a second pressing block 4 with the thickness of 14mm, scraping the surface layer of the rough soil sample, putting a second layer of soil material and roughly scraping;
6) sequentially putting a first pressing block 5 and a second pressing block 4 with the thickness of 6mm, and lightly pressing a pressing head 9 of the first pressing block 4 by a hand;
7) repeating the step 4) to prepare a soil sample with the total thickness of 14 mm;
8) sequentially taking out a first pressing block 5 and a second pressing block 4 with the thickness of 6mm, scraping the surface layer of the rough soil sample, and putting a third layer of soil material;
9) repeating the step 4), stabilizing the pressure for 1-2min, and preventing the soil sample 6 from rebounding after the briquettes are immediately taken out;
10) and taking out the first pressing block 5 and the second pressing block 4, unscrewing the upper base 2 and the lower base 1 through threads, inverting, sliding out the two cutting rings, and finishing the preparation of the cutting ring soil sample.
Claims (6)
1. A sample preparation device for a remolded cohesive soil direct shear test comprises a base, a cutting ring and a pressing block; it is characterized in that a round cavity with a closed lower end and an open upper end is arranged in the base; the outer diameter of the cutting ring is matched with the diameter of the circular cavity; the pressing block comprises a first pressing block and a second pressing block; the first pressing block is a cylindrical pressing block, and the diameter of the first pressing block is matched with the inner diameter of the cutting ring; the second briquetting is including pressing appearance head, limiting plate and the head of exerting pressure, presses appearance head, limiting plate and exerts the pressure head and sets firmly even as an organic whole in proper order by supreme down, and the central axis is on same straight line, wherein: the diameter of the sample pressing head is matched with the inner diameter of the cutting ring, the diameter of the limiting plate is larger than that of the circular cavity, and the diameter of the pressure applying head is smaller than that of the sample pressing head.
2. A remolding cohesive soil direct shear test sample preparation device according to claim 1, wherein the base comprises an upper base and a lower base, and the upper base and the lower base are detachably connected through threads.
3. A remolding cohesive soil direct shear test sample preparation device according to claim 1, wherein the diameter of the circular cavity is 65.5mm, and the height of the circular cavity is 40 mm.
4. A remolding cohesive soil direct shear test sample preparation device according to claim 1, wherein the cutting ring comprises an upper cutting ring and a lower cutting ring, the upper cutting ring and the lower cutting ring both have a height of 20mm, an outer diameter of 65.5mm and an inner diameter of 61.3 mm.
5. A remolding cohesive soil direct shear test sample preparation device according to claim 1, wherein the first pressing block comprises two cylindrical pressing blocks, the diameter of each cylindrical pressing block is 61.3mm, and the height of each cylindrical pressing block is 6mm and 14 mm.
6. A sample preparation device for a remolding cohesive soil direct shear test according to claim 1, wherein the sample pressing head has a diameter of 61.3mm and a height of 20 mm; the diameter of the limiting plate is 71.8mm, and the height of the limiting plate is 10 mm; the pressure applying head has a diameter of 30mm and a height of 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290628.8U CN215910268U (en) | 2021-09-22 | 2021-09-22 | Remold stickness soil direct shear test's system appearance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122290628.8U CN215910268U (en) | 2021-09-22 | 2021-09-22 | Remold stickness soil direct shear test's system appearance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215910268U true CN215910268U (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122290628.8U Active CN215910268U (en) | 2021-09-22 | 2021-09-22 | Remold stickness soil direct shear test's system appearance device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215910268U (en) |
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2021
- 2021-09-22 CN CN202122290628.8U patent/CN215910268U/en active Active
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