Soil sample layered compaction sample preparation device

Abstract

The utility model discloses a soil sample layered compaction sample preparation device which comprises a sample preparation barrel, a bottom plate, a top plate, a connecting piece and a pressing block, a detachable bottom plate is mounted at the bottom of the sample preparation barrel; the top plate is in threaded connection with the connecting piece; the connecting piece is divided into four sections of detachable parts, the heights of all sections of rod pieces are the same, all the parts are in threaded connection, and the rod pieces can be detached and installed according to use requirements; the pressing block is composed of a circular truncated cone and a rod piece with a threaded hole, and the diameter of the bottom face of the circular truncated cone is slightly smaller than the inner diameter of the sample preparation barrel. The device is simple in structure and high in sample preparation efficiency, layered sample preparation can be realized, so that the soil sample density is uniform, the thickness of each layer of sample is ensured to be the same by controlling the length of the rod piece, and the thickness and the compaction degree of each layer of sample are convenient to control.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical testing, in particular to a soil sample layering compaction sample making device. Background Art

[0002] The constant head permeability test, unconfined compressive strength test and triaxial compression test all require the preparation of samples in layers. The sample preparation method is to add soil samples into the sample preparation tube and compact them in layers, and it is necessary to ensure that the thickness of each layer of soil samples after compaction is the same. At present, the sample preparation usually uses a compaction hammer to hammer the sample in layers, and then uses a ruler to measure the height difference inside the sample preparation tube to control the height of the soil sample. However, it is difficult to ensure that the compaction energy generated by the compaction hammer each time the soil sample is hammered is the same, and the compaction degree of each layer of soil sample is not uniform. Using a ruler to measure the height of the soil sample is cumbersome and the manual reading is inaccurate. Therefore, it is very necessary to design a sample preparation device that can compact the soil sample in layers and evenly, and can control the thickness of each layer of soil sample. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a layered compaction sample preparation device.

[0004] The technical solution to achieve the purpose of this utility model is:

[0005] A layered compaction sample preparation device includes a sample preparation tube, a bottom plate, a top plate, a connector, and a pressure block. A detachable bottom plate is installed at the bottom of the sample preparation tube; the top plate has a diameter larger than the outer diameter of the sample preparation tube and is connected to the connector by threads; the connector is divided into four detachable parts, each section of the rod has the same height, and each section is connected by threads, and the rod can be disassembled and installed according to the use requirements; the pressure block is composed of a truncated cone and a section of the rod with a threaded hole, and the bottom diameter of the truncated cone is slightly smaller than the inner diameter of the sample preparation tube; the materials used for each part are stainless steel.

[0006] The top plate, the connecting piece and the pressing block in the sample preparation device form a compacting device.

[0007] The sample preparation tube is a hollow cylinder, the inner diameter of which is the same as the diameter of the soil sample, the outer diameter is 10 mm larger than the inner diameter, and the height is the sum of the bottom plate thickness, the soil sample height, the truncated cone height and the total height of the rod.

[0008] The bottom plate is a circular bottom plate, the diameter of which is 1mm smaller than the inner diameter of the sample preparation tube, and the thickness is 5mm.

[0009] The top plate is a circular top plate, with a diameter larger than the outer diameter of the sample preparation tube and a thickness of 10 mm. A circular threaded rod is arranged at the center of the top plate, and the threaded rod of the top plate matches the size of the threaded hole of the connecting piece.

[0010] The connecting piece is composed of four sections of rods, each of which has a threaded rod at one end and a threaded hole at the other end. The two ends of the connecting piece are respectively connected to the top plate and the pressing block. The threaded holes and threaded rods of each section of the connecting piece match in size.

[0011] The bottom of the pressing block is a truncated cone, the bottom diameter of which is 1 mm smaller than the inner diameter of the sample preparation tube. Above the pressing block is a rod with a threaded hole. The height of the upper rod is the same as that of the connecting rod section, and the size of the threaded hole matches that of the connecting threaded hole.

[0012] The utility model provides a soil sample layering compaction sample preparation device capable of controlling the thickness of the soil sample, and the device has the following advantages:

[0013] 1. The connector consists of four sections of rods connected by threads, which is easy to disassemble. The rods can be disassembled and installed according to needs to control the thickness of each layer of soil samples.

[0014] 2. The compaction work by the press ensures that the compaction degree of each layer of soil sample is uniform, and the data obtained from the prepared samples in subsequent experiments are more reliable.

[0015] 3. The contact part between the compacting block and the soil sample is designed as a frustum, which can reduce the contact area with the wall of the sample preparation tube and thus reduce the friction. It is more labor-saving to remove the compacting device after compaction is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 is a schematic diagram of a compaction device;

[0018] Figure 3 It is the schematic diagram of the top plate;

[0019] Figure 4 It is a schematic diagram of the connecting rod;

[0020] Figure 5 It is a schematic diagram of the briquetting;

[0021] In the figure: 1. Sample preparation tube 2. Bottom plate 3. Top plate 4. Connecting piece 5. Press block. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited thereto.

[0023] Example:

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown:

[0025] A layered compaction sample preparation device comprises a sample preparation tube 1, a bottom plate 2, a top plate 3, a connector 4 and a pressing block 5; a detachable bottom plate 3 is installed at the bottom of the sample preparation tube 1; the top plate 3 has a diameter greater than the outer diameter of the sample preparation tube 1 and is connected to the connector 4 by threads; the connector 4 is divided into four detachable parts, each rod section has the same height, and each part is connected by threads, and the rod section can be disassembled and installed according to usage requirements; the pressing block 5 consists of a truncated cone and a rod section with a threaded hole, the bottom surface diameter of the truncated cone is slightly smaller than the inner diameter of the sample preparation tube, and each part is made of stainless steel.

[0026] In the sample preparation device, the top plate 3, the connecting piece 4 and the pressing block 5 form a compacting device.

[0027] The sample preparation tube 1 is a hollow cylinder, the inner diameter of which is the same as the diameter of the sample, the outer diameter is 10 mm larger than the inner diameter, and the height is the sum of the bottom plate thickness, the sample height, the truncated cone height and the total height of the rod.

[0028] The bottom plate 2 is a circular bottom plate, the diameter of which is 1 mm smaller than the inner diameter of the sample preparation tube 1 and the thickness is 5 mm.

[0029] The top plate 3 is a circular top plate, with a diameter larger than the outer diameter of the sample preparation tube 1 and a thickness of 10 mm. There is a circular threaded rod in the center of the top plate, and the threaded rod of the top plate matches the size of the threaded hole of the connecting piece 4.

[0030] The connecting member 4 is composed of four sections of rods, each of which has a threaded rod at one end and a threaded hole at the other end. The two ends of the connecting member 4 are respectively connected to the top plate 3 and the pressing block 5. The threaded holes and threaded rods of each section of the connecting member 4 match in size.

[0031] The bottom of the pressing block 5 is a truncated cone, the bottom diameter of which is 1 mm smaller than the inner diameter of the sample preparation tube 1. Above the pressing block is a rod with a threaded hole. The height of the upper rod is the same as that of the connecting rod section, and the size of the threaded hole matches that of the connecting threaded hole.

[0032] The sample preparation using the above device specifically includes the following steps:

[0033] 1) Place the bottom plate 2 into the sample preparation tube 1, connect the threaded holes and threaded rods of each section of the rod in sequence to form a connecting piece 4, and the threaded rods at both ends of the connecting piece 4 are respectively connected to the top plate 3 and the pressing block 5;

[0034] 2) Add a portion of the soil sample into the sample preparation cylinder 1, place it in the compacting device, and use a press to perform compaction work;

[0035] 3) The compaction work is finished when the top plate contacts the upper edge of the sample preparation tube 1, and the compaction device is taken out after the soil sample is compacted;

[0036] 4) removing a section of the connecting member and reconnecting the remaining section to form a compacting device;

[0037] 5) Repeat steps 2), 3), 4) to obtain five layers of samples;

[0038] 6) After the sample is compacted, use a demoulding instrument to demould it, and the layered sample preparation is completed.

Claims

1. A soil sample layering compaction sample preparation device, comprising a sample preparation tube (1), a bottom plate (2), a top plate (3), a connecting piece (4), and a pressing block (5); characterized in that: A detachable bottom plate (2) is installed at the bottom of the sample preparation tube (1); the top plate (3) has a diameter larger than the outer diameter of the sample preparation tube (1) and is connected to the connecting piece (4) by means of threads; the connecting piece (4) is divided into four detachable parts, each rod having the same height, and each part is connected by threads, and the rod can be disassembled and installed according to the use requirements; the pressing block (5) is composed of a truncated cone and a rod with a threaded hole, and the bottom surface diameter of the truncated cone is slightly smaller than the inner diameter of the sample preparation tube; the materials used for each part are stainless steel.

2. The soil sample layering compaction sample preparation device according to claim 1 is characterized in that: The top plate (3), the connecting piece (4) and the pressing block (5) in the sample preparation device form a compacting device.

3. The soil sample layering compaction sample preparation device according to claim 1, characterized in that: The sample preparation tube (1) is a hollow cylinder, the inner diameter of which is the same as the diameter of the sample, the outer diameter is 10 mm greater than the inner diameter, and the height is the sum of the bottom plate thickness, the sample height, the truncated cone height and the total height of the rod.

4. The soil sample layering compaction sample preparation device according to claim 1, characterized in that: The bottom plate (2) is a circular bottom plate, the diameter of which is 1 mm smaller than the inner diameter of the sample preparation tube (1) and the thickness is 5 mm.

5. The soil sample layering compaction sample preparation device according to claim 1, characterized in that: The top plate (3) is a circular top plate, with a diameter greater than the outer diameter of the sample preparation tube and a thickness of 10 mm. A circular threaded rod is provided at the center of the top plate, and the size of the top plate threaded rod matches the threaded hole of the connecting piece.

6. The soil sample layering compaction sample preparation device according to claim 1, characterized in that: The connecting member (4) is composed of four sections of rods, each of which has a threaded rod at one end and a threaded hole at the other end. The two ends of the connecting member (4) are respectively connected to the top plate (3) and the pressing block (5), and the sizes of the threaded holes and threaded rods of each section of the rod on the connecting member (4) are matched.

7. The soil sample layering compaction sample preparation device according to claim 1, characterized in that: The bottom of the pressing block (5) is a truncated cone, the bottom diameter of which is 1 mm smaller than the inner diameter of the sample preparation tube. Above the pressing block is a rod with a threaded hole. The height of the upper rod is the same as the height of the rod section of the connecting piece (4), and the size of the threaded hole matches the size of the threaded hole of the connecting piece.

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